ML20127M648
| ML20127M648 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 12/31/1977 |
| From: | Heberling G, Ward E NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 9211300353 | |
| Download: ML20127M648 (110) | |
Text
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.I f' O R T H E R N STATES POWEH COMPANY u i N N a A p o s u . u s N N r. n o t A es4ot
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Tl ,ikI jdb.'/J"!' it IEC ' A 3 1 i m July 31, 1978 1 flr J G Heppler Director, hegion 111 1 Of fice of Inspection 6 Enf orcer.,ent
< U S tlucicar Regulatory Commission 4 /99 housevelt Road ' Glen Ellyn, IL 60137
Dear 11r Keppler:
il0!1TICI ALD liUC1. EAR GLiiEPAIING PIMT Do c k;_ . !;o . 50-263 License !;o. DPR-2 2 19 77 E'ivi ronmental 14cnitoring and
,Ecoloni.:al St udies P ron r ana keport In a co rda r.:e wi tti Technical Specif icat ion i tem 6. l .C.! -c ,
se are submitting two copies of the subject report. Yours very truly, 9 I
, 9 c- , S e\
1 L (.(. A ?( 4
'i E C Ward, PE 14anage r-huclear Environtaental Services {
ECW/deh fg{g cc: Director, UKR (c/o DSU) (17) q G Charnoff
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I e f**\ ENVIRONME NTA
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!l L AND lJ [i/
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ECOLOGICAL
.. STUDIES
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q .. s !' 177 - AN N JA_ pf(~ ,f l REPOR" /' FOR THE \_ MONTICELLO NUCLEAR GENERATING PLANT ' rJ
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i Monticello, Minnesota ' i m, MSP
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,r i Data Si RPOUL.' pp .~L .h
", , /;,wawredd ARY DOCKFT PTTE W/4,,(y reed oh ho
I 4, CONTENTS Page I NT R O D U CT I ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I WATER MONITORING STUDIES Water Monitoring Summary (Physical Parameters)......1.1-1 Water Monitoring Summary (Chemical Parameters)......1.2-1 ECOLOGICAL STUDIES Attached Algae (Periphyton). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1-1 Fi s h C reel S u rvey. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 2-1 Electrofishing S urvey S umma ry. . . . . . . . . . . . . . . . . . . . . . . . . 2.3-1 ! Fish S eining Study. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 4-1 l l l i i RE'1RN10 BCTOR DOCKiT F L iS C ..._ - . - a e r
l' i 4 I ! i i f i i INTRODUCTION i . A e i i
- Since 1968, Northern States Power Company has published and 2
i distributed annual reports of ecological / environmental studies in the area of Monticello Nuclear Generating Plant. This is the tenth consecutive report (seventh operational) and is for [i a the calendar year 1977. a j This is the last year a report of - studies of Attached Algae (Periphyton) will be issued. Also, the'Macroinvertebrate Study was discontinued in 1977. Fish Seining, a new study, , j was initiated in 1977 and will be continued in succeeding L years. 4
- -t I
2 I i i Environmental and Governmental Activities Department i Northern States Power Company (NSP) July 25, 1978 { 1 1 I a j i ] 1 1-
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MONTICELLO NUCLEAR GENERATING PIJsNT ENVIRO!O4 ENTAL MONITORIN/1 PROGRAM 1977 ANNUAL REPORT ) l I i , WATER MONITORING
SUMMARY
(Physical Parameters) (1.1) l J Prepared for Northern States Power Company Minneapolis, Minnesota by
~
; G. D. Heberling Environmental and Governmental Activities Department Northern States Power Company l 1.1-1 i
i _, ,.. - , , - - - , , - , n e e - wrc - - , v' v- ~- ~'
l i i I i i 1.1 1977 MONTICELLO WATER MONITORING
SUMMARY
i : 1.1.1 PHYSICAL PARAMETERS i 4 I
' I The Monticello Nuclear Generating Plant had seven outages i during 1977 (Table 1.1-1) . The accumulation of these outages amounted to slightly more than 72 days. The l {
outage of greatest duration began on September 9 and j terminated on November 10. This refueling outage accounted for 86 percent of the 1977 down time.
~
! I j Drought conditions, which began in the fall of 1975 and extended through 1976, persisted into the spring of 1977. Precipitation during this period was far below normal i and resulted in extremely low river discharges (Figure f 1.1-1). In the fall rainfall recharged drainage systems i' and river levels return to normal. , l [ Because of these low river levels, the thermal plume, f l . created by the Monticello Plant, was of greater magnitude and intensity, as evidenced by the factored average l temperature rise (FATR) in data in Figure 1.1-2. FATR 1 , determinations were made on 180 days in 1977 at the Minnesota Highway No. 25 bridge according to methods ! described in the 1974 report. These FATR's exceeded 50 F on 69 days or 38 percent of the time. -FATR's were exceptionally high during the winter, reaching a maximum . . weekly average of 15.3 0 F in February. Lowest FATR's l
- occurred in the summer when cooling tower operation l (helper mcde) dissipated most of the heat to the air.
b 1.1-3
t I' i Ambient river water temperatures are illustrated in , Figure 1.1-3. Winter temperatures were consistently at 320 F, warming began in March, and very rapid temperature - changes occurred in April. Maximum temperatures, near 4 800F, were attained in July, and a gradual temperature decline transpired in the fall with the occurrence of 9
! higher river discharges.
Discharge canal water temperatures were usually between 60 and 70 0 F during the winter (Figure 1.1-4) . Cooling tower failures in late July resulted in maximum annual discharge canal temperatures. The difference between ambient and discharge canal temperatures was generally 30 F during periods of once-through open cycle cooling. i This temperature differential dropped to 120F during periods of cooling tower operation (helper cooling mode). I Plant intake volumes are summarized in Table 1.1-2. The rate of water withdrawal by the plant from the Mississippi f River was generally between 500 and 600 cfs. The percentage of river discharge consumed by the plant (Figure 1.1-5) reached a maximum of nearly 50 percent in August. These high percentage consumption figures were t ! due to low river discharges and once-through cooling operation by the plant. l e e 1.1-4
.- ~ ._ -. - - .. - .__- __- .. .- ._ - _ . - - - .
l j Table 1.1-1. 1977 Monticello Off-line Time Time Off Tinie On Date Hrs Date Hrs Outage Time January - - - February 2/23 0659 2/24 0445 21' 46" a March 3/19 0248 3/21 0939 54' 51" April 4/19 1250 4/19 2352 11' 02" i May - - - June 6/11 1449 6/14 1258 70' 09" 6/25 0132 6/27 0702 53' 30" July - - - 1 August - - - September 9/9 2014 9/30 2400 507' 46" October 10/1 0000 10/31 2400 744'
- November 11/1 0000 11/10 2137 237' 37"
' December 12/15 2029 12/17 0729 35' TOTAL 1735' 41" l
72 Days 7 hr 41 min 4 l ' ) 1 e 1.1-5 I
t Table 1.1-2. 1977 Monticello water System Summaries Ambient 5 River River Plant Disch Canal Hoek of FATR Temp Discharge Intake Temp ., (*P) (*F) (cfs) (c f s) (*F) 1/2/77 12.0 32.0 1311 470 62.6 1/9 12.0 32.0 1315 465 61.7
, 1/16 12.8 32.0 1348 454 64.7 1/23 12.4 32.0 1424 442 64.5 i l 1/30 14.6 32.0 1558 425 67.8 2/6 15.3 32.0 3556 410 69.6 2/13 14.3 32.0 1808 412 68.9 2/20 9.5 32.0 1863 401 60.0
- 2/27 12.3 32.0 1843 453 58.5 3/6 , 10.6 32.0 2112 436 49.4 3/13 5.0 32.0 4389 395 69.5 3/20 4.1 32.0 3435 380 64.6
! 3/27 3.1 37.1 3427 435 76.0 4/3 3.0 39.7 3135 437 77.9 4/10 7.0 53.2 2740 457 88.6 4/17 5.8 57.3 3420 541 83.2 4/24 4.1 59.1 4027 570 88.7 5/1 4.4 61.1 2847 571 90.6 5/8 5.0 67.5 2233 580 92.3 5/15 3.0 72.5 1921 573 85.4 j 5/22 2.3 73.5 1807 576 86.0 5/29 2.1 72.7 2332 577 84.5
{ 6/5 1.2 71.6 3061 500 81.6 l 6/12 1.7 71.4 2269 412 80.1 l 6/19 2.2 73.0 2239 510 83.7 l 6/26 1.8 74.9 2126 483 82.2 7/3 3.1 78.6 3004 610 88.4 i 4 7/10 2.5 76.4 2757 621 87.7 7/17 4.5 79.7 1988 625 96.2 7/24 4.5 76.0 1741 547 91.4 , 7/31 3.4 73.2 1506 559 85.2 l 8/7 2.8 72.3 1276 588 84.8 8/14 3.6 69.1 1186 553 80.5 8/21 5.5 68.9 1135 560 82.6 8/28 5.2 68.7 2547 555 82.0 9/4 2.6 6'/ .1 3060 555 80.3 - 9/11
- 65.3 4402 485 68.1 .
3 9/18
- 61.6 3674 11 64.1 ,
, ! 9/25
- 58.5 4674 15 61.3 l } 10/2
- 54.7 5240 9 55.2 i
! 1.1-6
i . 1I i l
! Table 1.1-2 (continued) f . Ambient-4 -
River River Plant Disch Canal , Week of FATR Temp Discharge Intake Temp j - ('F) ('F) (cfs) (cfs) (*F) i 10/9/77
- 48.5 6460 8 48.8 il 10/16
- 47.6 6259 7 49.6 j j 10/23
- 48,1 5454 12 50.1 i
10/30
- 48.4 5384 11 50.5 4 11/6 2.0 44.2 6472 123 50.1 l 11/13 1.9 36.1 8561 540 65.4 j ; 11/20 1.9 32.4 6716 543 67.8 j 11/27 1.4 32.1 6340 541 68.2 l 12/4 1.2 32.2 6317 560 70.0 l l 12/11 1.9 32.4 5845 440 61.0.
j j 12/18 2.4 32.2 ~ 6259 553 65.1 1 12/25
- 32.1 5764 547 69.2 3
1 3 i 1 I
- No FATR detenninations made
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a Figure 1.1-4. 1977 Weekly Average Discharge Canal Water Temperature. 100- -100 . s 5 90- -90 - 80- -80 70- -70 e ,
,P 60- -60 e n.
A 5 . M B 50- -50 40- -40 30 , , ,- 1 , , , , , , , 30 J F M A M J J A S O N D MONTH
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Figure 1.1-5. 1977 Weekly Avorage Percentage of River l Discharge consumed by the Monticello Plant. 1
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1 4 i 50 - -50 j . - i 40- -40 4 il i t i 30- -30 8 i m o , I < - j O I N -20 i m 20-s l
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l . i i i r 10 - -10 l 0 , , , , , , , , , , , -0 J F M A M J J A S O N D
. MONTH 1.1-13
. ...- . . . . . - . - - - - - . . - _ ~ . - - . _ _ . - . - . . . . - - - -. . - - - - . . -.
i i .s l i ! i f i . MONTICELIO NUCLEAR GENERATING PLANT i ' ENVIRONMENTAL MONITORING PROGRAM 1977 ANNUAL REPORT i 1 ! i . 4 l i l- !; k~ } WATER MONITORING
SUMMARY
4 (Chemical Parameters) (1.2) l i i < 4 Prepared for ! , Northern States Power. Company ! Minneapolis, Minnesota
.1 by M. L. Hestick I ~
Environmental and Governmental
. Activities Department i
Northern States Power Company. I- i l 1.2-1
2 1 4 I i l.2 MISSISSTPPI RIVER WATER MONITORING PPOGR$d e 1.2.1
SUMMARY
Mississippi river water chemistry analyses were done on l samples taken from the three sampling sites that have been
- used since 1972. The sample statistics were used as j estimates of river water parameters. Statistical values from the discharge canal and downstream samples were com-pared with upstream sample statistical values. Significant differences were calculated with the use of a 95 percent confidence limit t-test, in an attempt at determining the
- impact of the Monticello Plant discharge on the river.
- The three sampling sites included 1,000 feet upstream from the intake structure, the discharge canal, and 1,000 feet l downstream from the outfall. Samples were collected during
! the last waek of the month from January through December 1977 by NSP personnel. Sample analyses were performed j at the NSP Company testing laboratory. Both sample collection and analyses were done according to procedures ; outlined in the US EPA Manual of Methods for Chemical ! Analyses of Water and Wastes and APIIA-AWWA-WPCF Standard 4 Methods for the Examination of Water and Waste Water. l The results of the analyses are presented in Tables 1.2-1. l The t-test revealed significant differences between up-l stream sample statistics and discharge canal and downstream j . sample statistics in the following water properties:
- Temperature--both the discharge . canal and downstream
- samples had higher values than upstream; dissolved 1.2-3
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- oxygen--only the discharge canal samples showed any I
difference. There was a reduction in the sample statis-1 I tical value. There were also reductions in the concen- , n trations of carbonates'(c0 3=) and p - alkalinity (Caco 3) i i 1 in both the discharge canal and upstream samples. Graphs i of these statistics are presented in Figure 1.2-1. 2 The increase in temperature in conjunction with the l . decrease in dissolved oxygen, p - alkalinity (Caco3) and l cO3= were consistent with the principles governing the j solubility of gases in liquids.. What is noteworthy is the ,, f absence of any significant difference in the dissolved j j oxygen concentrations of the upstream and downstream samples. ! This fact does suggest a rapid return to normalcy of the i water system, with reference especially to this specific t ' important water parameter. i ! l l l l l I e L i L i l . _ _ i e 9 l l 1.2-4 .
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Table 1.2-1 Mississippi River wat Analysis Mg/l - Upstream Tot. Tot. Calcium Magnesium Total Alk. Month Solids TDS TSS Hardness CACO 3 CACO aCO 3 3 Jan 250 248 1.6 213 140 72 201 Feb 242 241 1.2 198 130 68 188 Aarch 199 195 4.2 152 100 52 137 April 217 198 18.8 168 110 58 153 May 213 190 22. 172 108 64 160 June 193 177 16. . 156 98 58 143 Jul*/- 196 178 18.2 148 94 54 137 ia w August 178 162 16.2 142 90 52 130 1
- Sept 182 173 9.4 132 88 44 121 October 185 177 7.8 132 88 44 119 Nov 201 184 7.9 150 100 50 134 Dec 207 205 2.2 170 114 56 161 TOTAL 2463 2328 125.4 1933 1260 672 1784 MEAN 205 194 10.45 16 105 56 148.6 l l
S. D. 22.4 28.9 7.53 7',7 16.48 8.69 25.4 Lowest 178 162 1.2 150 88 44 119 Highest 250 248 22.6 213 140 72 201 No 12 12 12 12 12 12 12
. %- ur , , x n n
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4 e t i Upstream ; Table 1.2 (Continued) . Mississippi River Water Analysis. Mg/l - s Carbonate Bicarbonate Chloride Nitrate 1 P-Alk. Dissolved Ammonia Month- . CACO 2 3 3' , 3 0.67 ;0.0 .245 8.0 0.40
.Jan 0.0- -6.50 i 0.0 229' 9.0 0.48 Feb 'O.'- .9.25 0.49 0.33 0.0 167- 6.0 0.57 March 0.0 10.00 0.00 7.2 172 50. 0.00 April 6.0 8.70 0.03 10.2 174 4.5 0.01 May 8. 5 - -8.00 0.00 '6.6 160 8.5 0.02 June 5.5 8.60-14 8 6.0 . <0.01 July 7.5 9.50' O.02 9.0 g
- 6.10 <0.01 6.0' 146 6.0- O.11 August 5.0' l7
- m 0.30 0.0 .7.10 0.04 -0.0 147 6.0 Sept 0.02. .0.0 145 4.0 0.15
' October. 0.0- l11.00
-12'.00: 0.06 0.0 163 5.0 0.30
'Nov O.0 13.40 0.14 0.0 196 8.0 0.35 Dec 0.0 110.15- < l'. 8. 39.0 2092 76.0 2.70 TOTAL 32.5 9.17 <0.15 7.8 174.3 -6.3 0.22
- MEAN .- 6.5 2.19 0.20 2.0 32.9 3.31 0.30 S. D. 1.45 6.10 0.00 .0.0 145 4.00 0.00-Lowest 0.0 13.4 0.67 10.0 2.45 9.00 0.57 Highest 8.5 12- 12 12- 12 12 No 12 12
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T&ble 1.2-1 (Continued) Mississippi River Water Analysis Mg/l - Upstream Sulfate Tot. Sol. P. Silica Calcium Magnesium Sodium Total Month S0 4 P SiO 2 Ca Mg Na Fe Jan 22.4 0.085 13.4 56.1 17.5 9.4 0.09 Feb 20.5 0.064 12.2 52.1 16.5 9.8 0.12 March 25.0 0.045 9.5 40.0 12.6 6.8 0.15 April 24.5 0.019 1.5 44.1 14.1 6.8 0.11 May 15.5 0.034 5.8 43.3 15.6 7.0 0.35 June 16.0 0.041 9.8 39.3 14.1 7.4 0.15 July 11.2 0.095 9.8 37.7 13.1 6.2 0.10
. August 14.0 0.036 4.7 36.0 12.6 6.6 0.20 9
4 Sept 14.8 0.052 9.9 35.2 10.7 4.8 0.18 October 13.9 0.031 7.3 35.2 10.7 5.0 0.25 Nov 8.2 0.033 10.2 40.1 12.2 5.2 0.33 Dec 16.0 0.033 12.7 45.7 13.6 5.7 0.35 TOTAL 202.0 0.568 106.8 504.8 163.3 80.7 2.38 MEAN 16.8 0.047 8.9 42.0 13.6 .7 0. L*# S. D. 5.2 0.023 3.5 6.62 2.11 1.58 0.24 Lowest 8.2 0.019 1.5 35.2 10.7 4.8 0.09 Highest 25.0 0.095 13.4 56.1 17.5 9.4 0.35 No 12 12 12 12 12 12 12 s
_. - _ _ . _ . .s
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Di I Table l.2-1 (Continued) Mississippi River Water Analysis Mg/l - Upstream .
~
'- Ryznar Conductivity .. Turbidity Index pinhos/cm Color Temp.*C NTU At 25'c at 25'C pH
-Month ' APHA BOD g i
15 1.3 -1.0 1.5 7.04 440 7.90 ,
~Jan-15 1.3 0.0 1.5 7.11 420 7.75 Feb March 30' -
3.O' 2.2 7.21 330 8.15 April 20 4.0 16.0 4.8 6.50 340 8.70 May 20- 3.9 23.0 6.5 6.42 309 8.75 50 3.1- 24.0 5.0 6.64 260 8.65 June July' 50 3.2 23.5 6.9 6.60 ~305 8.80 290
.s 30- 21.0 5.2 6.81 8.65
. August 1.6 w
4.5. 7.31 270 8.25
$ Sept- 70 '*1.0 .15.0
\ october 80 1.2 10.0 4.2 7.26 265 8.30 Nov 70 -1.1 0.0 4.5 7.30 294 8.10 Dec 50 - 0.0 2.4- 7.10 328 8.05 $ TryrAL' 500- .' 21.' 7 134.5 49.2 83.3' 3851 100.05 i MEAN 41.66' '2.17 11.20 4.1 6.94 320.9 8.33 I S. D. 23.1' l.23 10.36 1.8 0.33 56.9 0.36 l j Lowest '15 0.0 -1.00 1.5 6.42 265 7.90 Highest. 80 3.9 '24.00 6.9 7.31. 440 8.8 No 12: 12 12- 12 12 12 12
- Estimated value ,. incubation period too long.-
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Table 1.2-1 Mississippi River Water Analysis Mg/1. - Downstream , Tot Tot. Calcium Magnesium Total Alk.= Month Solids- TDS TSS Hardness CACO 3 CACO 3 CACO 3 Jan- 256 254 1.8 212 140 72 202 . j Feb 243- 243 0.0 200 132 68 188 l- March 202 196 5.6 152 '102 50 137 April. 219 202 17.2 168 110 '58 154 May 221 199 22.2' 172 110 62 162
- June 204 189 14.8 156 100 56 145 i
- j. July '197. '
181 15.6 150 96 54 139 ! M August 187 170 17.4 142 90 52 131 j ' Sept 182- 175' 6.8 132 90 42 121 t October- 186 179 7.2 132 90 42 119 Nov .201 '195' '6.4 150- 100 50 134 Dec 203 200 2.8 172 116 56 161 i i TOTAL 2501 2383 117.8 1938 127C 662 1793 ! MEAN-. 208.4 198.5' 9.8 161.5 106.3 55.1 149.4- - i
.S.D. 22.69 25.6. 7.17 24.5 15.9 8.8 25.5 i Lowest 182 170 0.0 132 90 50 119 .
l Highest 256 254 22.2 212 140 72 202
- No. 12- 12 12.0- 12 12: 12 12-
- t _'O.326 'O.40_ 0.22 0.05 O .1% 0.08 0.07 i
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Table 1.2-1 Mississippi River Water Analysis Mg/l - Discharge Canal (Cont.) Tot. Tot. Calcium Magnesium Total Alk. ; Month Solids TDS TSS . Hardness CACO 3 CACO 3 CACO 3 i 253 1.6 212- 140 72 201 Jan- 255 239 . 238 1.2 200 130 70 188 1 Feb 199 194 5.2 152 102 50 137 March-219 199- 20.0 168 112 56 154 April _ 220 199 20.6- 172 110 62 161 May 197 180 14.8 156 100 56 145 j June 195 179 16.4 150 96. 54 137 July 165 16.8 142 90 52 131
.
- August 182 to 177 6.6 132 88 44 121 b Sept- 184 O- 44 121 October '173 168 ,
5.4 132 88 201 6.2 150 100 50 134 2 Nov 207
' 199 2.8 172 .116 56 161 l Dec 202 i
2472 2352 117.6- 1938 1272 666 1791 4 TOTAL 206 196 9.8 161.5 106 55.5 14 9.2 - MEAN 23.8 26'.4 7.4 - 24.5 16.4 8.86 25 S.D.. 173 165- 1.2 132- 88 44 121 i' Lowest 4 Highest '255 253- 20.6 212 14 0 72 '201
- 12. 12 .12 12 12 12 12
- No.
0.10 0.18 0.22 0.05 0.15 0.08 0.05
, t
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-- ' - - - - ~ -
Table 1.2-1 Mississippi River Water Analysis Mg/l - Discharge Canal (Cont. ) P -Alk Dissolved Anunonia Carbonate Bicarbonate Chloride Nitrate Month CACO 3 02 N CO 3 IICO3 Cl N Jan G.0 6.5 0.59 0.0 245 8.0 0.45 Feb 0.0 8.5 0.49 0.0 229 9.0 0.46 March 0.0 8.5 0.31 0.0 167 6.0 0.55 April 5.0 8.0 0.01 6.0 176 4.5 0.0 May 6.0 6.5 0.03 7.2 182 5.0 0.01 June' 4.0 8.4 0.00 4.8 167 5.5 <0.01 July 6.5 6.9 0.02 7.8 151 6.5 <0.01 w g August 5.0 5.8 0.01 6.0 147 6.'. 0.11 I p Sept 0.0 5,7 0.00 0.0 147 50 0.30 October 0.0 9.5 0.03 0.0 147 '.0
. 0.17 Nov 0.0 5.4 0.09 0.0 163 5.0 0.28 Dec 0.0 9.2 0.14 0.0 196 7.0 0.37 TOTAL 26.5 G8.9 1.72 31.8 2117 73.0 < 2. 72 MEAN 5.3 7.4 0.17 6.3 176.4 6.0 <0.24 S.D. 1.0 1.43 0.21 1.17 32.3 1.38 0.197 Lowest 0.0 5.4 0.00 0.0 147 4.5 0.0 Highest 6.5 9.5 0.59 7.8 245 9.0 0.55 No. 12 12 12 12 12 12 12 4
t 2.4 # 3.87 # 0.24 3.2 # 0 15 0.22 0.22
# = Significant (95% confidence limit)
_ _ _ . _ _ _ _ _ _ _ _ _ _ - _ _ _ _ . . . _ _ _ . . _ . - _ _ . . _ _ _ _ . _ _ _ . _ . _ . _ . _ . . . _ . . _ . _ . _ . _.._._ ..-.m..
- - . . . -.a.. ... ,. _ - : .u ,
t
-t Table " 1.2-l' Mississippi River Water Analysis Mg/l - Discharge Canal T (Cont.) Sulfate -Tot. Sol.P. Silica Calcium Magnesium Sodium Total l '
SiO 2 Ca Mg Na Fe ;
- Mcnth SO4 P i
21.1 0.086 1? 4 56.1 17.5 10.0 0.10 ; Jan . 0.060 12.2 52.1 17.0 9.8 0.10 4 Feb 20.0 0.045 9.3 40.9 12.2 6.8 0.23 March 24.7 i 0.017 2.1 44.9 13.6 6.2 0.17 April 23.9 1 17.5 0.042 6.4 44.1 15.1 7.0 0.43 4 May
.16.4 0.048 10.1 40.1 13.6 7.4 0.05 -
! June'
'13.9 0.095 9.4 38.5 13.1 6.6 0.15
+ July. ! e 0.044 5.0 36.0 12.6 6.4 0.18 i y August 14.0
.0.060 9.9 35.2 10.7 5.0 0.15 b- Sept 14.8
- j. N 5.2 0.19 14.4 0.36' 7.8 35.2 10.7
- October !
0.039 10.2 40.1 12.2 5.0 0.34 Nov' 8.6 , 16.3 'O.02 12.5 46.5 13.6 5.9' O.14 Dec 0.592 108.5 509.7 161.9 81.3 2.23 j TOTAL 205.6 17.1 0.049 9.04 42.47 13.49 6.77 C.185 , ! MEAN i 0.023 3.29 6.6 2.15 1.6- 0.106 !~ S.D. 4.6 10.7 5.0 0.05 i Lowest 8.6 0.017 2.1 35.2 24.7 0.086' 13.6 56.1' 17.5 10.0 0.43 ; Highest i 12.0 12.0- ' No. 12.0 12.0 12.0 '12.0 12.0 , 0.15: 0.25 0.03 0.175 0.12 0.07 0.13
- t 4
7 4 k' 1
_ _ _ . . . _.... - _ . _ _ . _ . _ , . _ .- ._._ _.._.--...s. _ . . . _ _ . . _ . _ . - _ . _ , _ . . . . _ . . _ _ . _ .__._
- -- - ~ '
, - - . - - _ , . - ~ - - . - . - - - -
1 4 Table 1.2 11 Mississippi River Water Aralysis Mg/l - Discharge Canal 2
. (Cont. ) Turbidity Ryznar Index
., Conductivity l Month APHA BOD' Temp OC NTU at 250C umhos/cm @ 25'C pH l ] Jan 15 2.9 22.5- 1.6 6.86 440 7.90.
- :Feb 15 1.5 21.0 1.5 6.96 420 7.90 :
1 : 4, March 30 - 21.0 2.5 7.14 330 8.20 :
-April 20 3.8 31.5 5.0 6.51 340 8.65 May 20 2.5 29.0 6.3 6.52 315 8.60 June '40 3.1 28.0- 5.3 6.55 265 8.75
- July 60 3.0 27.8 6.9 6.65 307 8.75
. ." August' 30 1.5 29.0 5.9 6.76 296 8.70 n
4
-w.
Sept 70
- 1. 2 ' 15.0 4.0 7.31 270 8.25
, -October :80- 1.1 11.0 3.6 7.30 270 8.20 f 1 Nov .70 1.3 18.2 4.5 7.30 294 8.10 i Dec 40 0.0 19.5 2.4 7.0 32? 8.70 , t i TOTAL. 490 21.9 273.5- 49.5 82.86 3870 100.7 s.
- j. MEAN 40.8 2.19 22'.7 4.12 6.90 322.5 8.39 I- S.D. 23.4 0.97 6.18 1.83 ,0.31 55.8 0.33 !
- Lowest. 15 0.0 11.0 1.5 6.51 270 7.9 i: Highest 80 3.8 31.5 6.9 7.3 440 8.7
{ No. 12 '12.0 12.0 "12.0 12.0 12 12.0 , t .0.03 0.04 -3.1# O.01 0.16 0.0 0.43
'* Estimated-value,. incubation period too long l # Significant: (95% confidence limit) 1 y
i {'
_ a a.. - . . . i Table 1.2-1 Missisaippi River Water Analysis Mg/1. - Downstream - (Cont. ) Ammonia Carbonate Bicarbonate Chloride Nitrate-P-Alk Dissolved C0 3 HCO 3 Cl N Month CACO 3 02 N t 0.54 0- 2,4 6 8.0 0.45 t . Jan 0 5.8 i 0.43 0 229 9.0 0.50 Feb 0 8.4 , il 0.32 0 167 6.0 0.56 March 0 8.5 i 0.01 4.8 178 5.0 0.0 l April 4 7.5 0.03 4.8 188 5.0 0.01 May 4 7.0 0.00 7.? 162 5.5 0.01 ! June 6 8.9 6.4 <0.01 7.2 155 5.5 <0.01 , July 6 i H 0.12 ! 5 5.8 0.01 6.0 147 6.0 l w August l. 0.00 0.0 147 5.0 0.30 !. '% Sept 0 5.7 0.02 0.0 145 5.0 0.15 October O 10.0 i i 0.08 0.0 163 5.5 0.33 j- Nov -. 0 '12.8 0.09 0.0 196 7.0 0.47
.Dec. 0 10.6
)
<l.54 30.0 2123 72.5 < 2. 91
! 2DTAL 25 97.4 i 8.1 < 0.154 6.0 176.9 6.0 < 0.242 MEAN 5.0 0.199 1.2 32.72 3.3 0.194.
, S.D. 1.0- 2.0 i i
0.00 0.0 145 5.0 0.0 i Lowest 0.0 5.7 0.54 7.2 246 9.0 0.56 l Highest 6.0 12.8
- - 12.0 12.0 12.0 12.0 12.0 12
[ No. 12.0 1.9 0.05 -3.3# 0.194 0.22 0.22 j t 3.0# i # - Significant (95% confidence limit) t
!i
i, Table-1.2-1 nissiJ'ippi River We.er Analysis Mg/l - Downstream
-(Cont.) Sulfate Tot. Sol.P. Gilica Calcium Magnesium Sodium Total P Ca Mg Na Fe Month SO4 .SiO2 0.084 14.0 56.1 17.5 10.0 0.10 Jan 22.0 0.064 11.8 52.9 16.5 9.8 0.12 Feb 20.5 0.045 9.0 40.9 12.2 6.8 0.23 March 23.1 April 23.9 0.016 2.1 44.1 14.1 '6.6 0.16 17.5 0.052 6.3 44.1 15.1 7.0 0.43 May 16.5 0.040 9.8 40.1 13.6 7.4 0.10 June July 14.2 0.085 9.0 38.5 13.1 6.0 0.15
." August 14.0' O.044 5 .1 36.0 12.6 6.6 0.21 to 14.5 0.054 9.9 36.0 10.2 5.0 0.14 Sept h 10.2 5.0 0.29 October 13.8 0.030 7.5 36.0 8.2 0.033 9.9 40.1 12.2 5.2 0.33 Nov 15.4 0.0i4 12.9 46.5 13.6 5.8 0.26 Dec 0.577 107.3 511.3 160.9 81.2 2.52 TOTAL 203.6 16.56 0.048 8.94 42.6 13.4 6.7 0.21 MEAN S.D. 4.6 0.023 3.3 -6.5 2.21 1.66 0.102 8.2 0.016 2.1 36.0 10.2 5.0 0.10 Lowest Highest 23.9 0.085 12.9 56.1 17.5- 10.0 0.33 No. 12.0 12.0 12.0 12.0 12.0 12.0 12.0 t 0.09 0.012 0.03 0.224 0.22 0.0 0.1
.r-
7_ i . . _
. ... s . -__. _ _ _ . _ _ -__..-...u_~ ._ __, . . _ _ _
Table 1.2-1 Mississippi River Water Analysis Mg/l - Downstream (Cont.) Color Turbidity 'Ryznar Index Conductivity BOD Temp CO NTU at 250C umhos/cm @ 25'C pH Month APHA Jan 15 2.9 22.0 1.5 6.86 440 7.9 i Feb 15 2.7 21.5 1.4 6.96 420 7.9 March 30 - ' 21.0 2.5 7.19 330 8.15 April 20 3.5 31.0 4.1 6.58 340 8.60 May 20 1.9 28.0 6.5 6.54 315 8.60 June 50 3.1 27.0 5.5 6.62 265 8.70 July 60' 3.0 27.8 6.5 6.65 305 8.75 ! August 30 1.7 26.5 5.8- 6.76 290 8.70 Sept 70 *l.2 15.1 4.0 7.29 270 8.25 I
." October 80 1.0 10.0 3.9 7.24 265 8.30 9
Nov 70 1.2 10.0 4.4 7.30 286 8.05 h. cn - Dec 40 - 13.0 2.3 7.10 323 8.0 I TOTAL 500 22.2 252.9 - 48.4 83.09 3849' 99.9 ! MEAN 41.6 2.22- 21.0 4.03 6.92 320.7 8.32 4 S.D. 23.5 0.927 7.40 1.81 0.29 57.0 0.33 i 4 Lowest 15 0.0- 10.0 1.4 6.54 265 7.90 l Highest 70 3.5 31.0 6.5 7.3 440 8.75-i No. 12 12.0 12.0 12.0 12.0 12 12.0 I t 0.003 0.11 2.8# 0.0 0.28 0.00 0.07
- Estimated value, incubation period too long l # - Significant (95% confidence limit) j l' - '
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. . . 1 9
a ! 1977 MONTHLY TEMPERATURE VAUJES ('C) i MISSISSIPPI RIVER WATER SAMPLES TAKEN AT T11E < a Figure 1,2-1 MONTICELID GENERATING PIANT SITE , 3A / sN !
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-r P
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Figure 1.2-1 (Continued) . 1977 MONTHLY DISSOLVED OXYGEN (ppm) 14- MISSISSIPPI RIVER WATER SAMPLES TAKEN AT THE MONTICELLO GENERATING PIANT SITE 13-12- Upstream ,
---- - Di scharge , \ '
- Downs tream /
11-
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. .. . , _._..._..m . m...._.._.. . _ . . . . _ . _ . . - _ . , . . ~ . _ _ _ . _ . - ., . . . . _ . . _ _ . . _ . ~ . . . . . _ . _ . . - _ _ . . , . . . . _ . . . . . . . . . , _ . . . . . . . . . .
k L 4 Figure 1.2-1 (Continued) 1977 MONTHLY CO3 (mg/1) MISSISSIPPI RIVER WATER SAMPLES TAKEN.
- AT THE MONTICELLO GENERATING PIANT SITE b
Upstream 10 - ---- Dischargo
--- Downstream 9-
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. -m. . . ~ _ - - ~ --
_ , _ ~ ~ _ . -
?
f 1 < u I t
. Figure 1.2 (Continued) ' MONTHLY P-ALKALINITY VALUES -(mg/l)
' MISSISSIPPI RIVER WATER SAMPLES TAKEN AT THE MONTICELLO GENERATING PIANT SITE Upstream 11- ----- Discharge
-- Downstream
_. i 10 - 9- , c 1 4 8-I o O.
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' JAN - MAR APR. .MAY 'JUN JUL AUG- SEP OCT NOV- DEC l
FEB MONTH
- i I
. .. . = _.
i i 4 MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL MONITORING PROGRAM
- 1977 ANNUAL REPORT b ,
i I a n 4 1977 ATTACHED ALGAE STUDIES OF THE 3 MISSISSIPPI RIVER NEAR THE MONTICELLO NUCLEAR GENERATING PLANT
; .(2.1) i i
f For Northern States Power Company. Minneapolis, Minnesota l 3 I by G. M. Kuhl Environmental and Governmental Activities Department l Northern States Power Company e e. 2.1-1
4 f 2.1 1977 ATTACHED ALGAE STUA 'ES OF THE MISSISSIPPI RIVER NEAR THE MONTICELLO NUCLEAR GENERA _T_ING PLANT i 2.
1.1 INTRODUCTION
l Attached algae data gathered during 1977 represented the ninth year of the program with seven operational years and l two preoperational years of data. The periphytic flora of 1 large rivers is found on or near the substrate of the river-bed, aquatic macrophytes, and various types of debris. Algal cells sloughed or abraded off their natural substrates are available for colonization onto glass microscope slides ! utilized-in the monitoring program. , This report investigates seasonal trends of the periphyton community in response to natural environmental factors and
- the addition of ther;aal plant effluent. The interaction of l seasonal data, based on current velocities and temperatures,
' . I' allows statistical analysis to indicate the presence or i absence of significant environmental impact. Species composi-i- tion and cell biomass estimates, coupled with the statistical analysis, provide the basis for interpreting the periphyton {' community. 4 2.1.2 MATERIALG AND METHODS 2.1.2.1 Field Procedures
- Five periphyton monitoring stations are located within the
[ study area (Figure 2.1-1). Stations 2 and 7 represent ambient locations, whereas Stations 3, 3A, and 11 are affected by the. thermal plume. Field sampling procedures remained consistent 2.1-3
4 .a + , . - ' + -
---t.
- ...--m ,_ . . _- 2. - . .-- - ----- - - - - - - - - --
i-. 1 l with previous years. Nine glass microscope slides were placed in a stainless steel and acrylic plastic sampler and , i allowed to colonize in the river for 14 days (Figure 2.1-2). i After the colonization period, one slide was removed from - l each rung, the side not facing the current scraped clean, l > and then placed in a bottle containing 'approximately 10 ml of I , magnesium carbonate saturated 90 percent aqueous acetone i ! solution. The remaining slides were placed in order in an appropriately labeled slide tox. All samples were placed in an ice chest and returned to the ldboratory.
, 2.1.2.2 Laboratory Procedures i 2.1.2.2.1 Pigment Analyses 1
Pigment analysis procedures for chlorophyll a remained consistent with previous years; samples were scraped, macer- [ ated, diluted to a known volume (25-100 ml), and centrifuged i for ten minutes. Pigment extract was decanted into n four-centimeter cuvette and analyzed at 665 nm and 750 nm before l and after acidification using a Beckman Model DB-GT spectro- [ photometer. Chlorophyll h, concentrations and Phaeophytin a, L , the primary degradation product of chlorophyll a, were deter-mined by computer program utilizing the Lorenzen (1967)
.i
! equation:
i I. Chlorophyll a, pg/cm = 26.7 [(665-750)" - (665-750) *3 x V (18.0 cm / slide) (4 cm light path) . 9 1 Phaeophytin a,pg/cm = 26.7[1.7 (665-750)* -(665-750)"3 x V ' (18.0 cm / slide) (4 cin light path) l-2.1-4
- ._ - _ __ _ ..__._~_ _ -
i f i where
- j. u = unacidified a = acidified I ,,
665 = Chlorophyll a absortm;e ! 750 = turbidity' blank e Deu: Dance , i i
- ; V = acetone & chlorophyll a extraction volume - (ml)
Results of above computer ualysis-~are expressed-as micro-
]~
f grams of chlorophyll a an'd phaeophytin a_ per square centi-I meter, and as percent chlorophyll a _(chlorophyll a x 100/ chlorophyll a + phaeophytin a) .
-i t
. As in previous years, a three-way analysis of variance on
- ! chlorophyll A data evaluated the significance of interaction i i between ambient Stations 2 and 7, and heated Stations 3 and 11 (Knutson 1976). Stations 2 and 11 were paired as medium current velocity; and Stations 3 and 7 were paired as having -
( fast current velocities. The F-test values consider tempera-l~ ture (ambient versus heated), time, and: habitat. i
~
2.1.2.2.2 Taxonomic Identification and Enumeration i 1 i: 1 Periphyton enumeration was carried out utilizing two methods, l~ 4 one method for non-diatom species and another method -for - analyzing diatoms. _Non-diatom sp<.m.ies were mounted using - the same method employed by Knutson-(1976).- Diatoms were ' .- 1'
- prepared by scraping the algal film from the-- slide into -a 250 ml beaker and cleaned using nitric acid and' potassium dichromate. Cleaned frustulos were placed in a vial and
. diluted to ten milliliters with distilled water. This
~
~
sample was then shaken, and a known aliquot pipetted onto a i 2.1-5 I w .- n - -c c .- - - , - - ,, .-. , - + , -Inw .,r ., ,,,,n,. amn ---,,-nan A m.+e rw e' A - n u ,,rw,-- v
J l t 22 mm 2 No. 1 cover glass. The cover glass was heated on a l hotplate to evaporate all moisture and a permanent mount made
- j using Hyrax. The finished slide was labeled and categorized i
until identification and enumeration analyses. . i I Enumeration procedures were done using an American Optical a Phase Star phase contrast microscope and 1000 x oil immersion, l Standard taxonomic keys were used to identify algal species observed on 30 random fields or until 100 of the most dominant species were tallied. Raw data were then extrapolated to determine algal density (cells / square centimeter) .
-i 2.1.3 RESULTS I
2.1.3.1 Physical Parameters The 1977 sampling year ran from April 13 through November 10 with 15 sampling periods averaging 14 days each. Table 2.1-1
; shows the sampling schedule, mean river water discharge,
- mean ambient river water temperature, and plant off-line times.
1 i i River water temperature data were taken at each station on each sampling date. Temperatures ranged from 7.0 C to 27.5 C at ambient stations, whereas heeted stations had a temperature range from 8.0 C to 33.0 C. Extended periods of plant off-line time resulted in heated station temperatures approaching ambient river water temperatures. , Current velocity measurements were taken at each station on - all dates, with the exception of periods of instrument mal-2.1-6
function. Current velocity, related to river water discharge, exhibited a range from-0.0 meter per second at Station 3A in the : discharge' canal during periods' of plant off-line to a e maximum of:1.2 meters per second at Station 2 on April 26 and-June 7. Seasonal mean current velocities were 0.9 and 0.6 meters per second for ambient Stations 2 and 11, respectively, while heated Stations 3 and 11 exhibited a seasonal mean of-0.6 meter per second _ for both stations. 2.1.3.2 Chlorophyll a Analyses Table 2.1-2 shows chlorophyll a_ concentrations (micrograms per l square centimeter) for all stations on all sampling dates. Ambient stations'had a chlorophyll a_ range from 0.17 pg/cm at Station - 2 on October 12 .to 7.89 pg/cm ' at ' Station 2 on April 26. Heated stations had. chlorophyll a ranges from 2 2 0.07 vg/cm -at Station 11 on' October '26 to 7.59 pg/cm at Ste. tion 7 on April 26. High spring'_ chlorophyll a concentra - - tions at both heated and ambient stations are associated with
- the-spring. diatom community of Diatoma vulgare,-Navicula _
salinarum var. intermedia,- and Gomphonema olivaceum. Figure 2.1-3 'shows the seasonal chlorophyll a concentrations forallshations. Spring - maxima are - followed by! irregular
- summer trends. Fall chlorophyll A concentrations drop before the onset of- the late fall / winter community. - FiguresI2.1-4
-through 2.1-8 indicate. chlorophyll:a concentrations related to.riverLwater temperature and current velocity.
Table 2.1-3 shows_ seasonal percent chlorophyll A values -for all stations. Ambient stations exhibited a range from 54 2.1-7 _ . ~ . _ _ _ _ _ _ . _ . . _ _ _ _ . _ _ _ _ _
, . . _u - .
percent at Station 7 on May 24 to 100 percent at Station 7 I on April 26. Heated stations had a percent chlorophyll a range from 39 percent at Station 3A on June 7 to 100 percent at Stations 3 and 11 on November 9. Seasonal means for per-cent chlorophyll a values were 87 percent for ambient Stations 2 and 7 and 76 percent for heated Stations 3, 3A, and 11.
) Table 2.1-4 shows phaeophytin a concentrations for all sampling periods at all stations. Ambient stations had a range-from 0.00 pg/cm at Station 7 on April 26 and November 9 to 1.31-pg/cm at Station-7 on May 24. Heated stations had a phaeophytin range from 0.00 pg/cm at Stations 3 and 11 on November 9 to 1.85 pg/cm at Station 3A on June 7.
3 2.1.4 DISCUSSION 4 The attached algae community of the Mississippi River near-i Monticello, Minnesota has had considerable investigation I' since 1969. During this time the species composition and
' chlorophyll a biomass estimates have defined the qualitative and quantitative aspects of the periphyton assemblage.
F Addition of thermal effluent has been the area of major interest in relation to possible adverse environmental impact. A three-way analysis of variance (ANOVA) was conducted on chlorophyll _a biomass estimates relative to time, temperature, habitat, and their interaction components. No significant difference was shown with respect to all statistical components . of the-ANOVA with the exception of time. This is an expected j response due to-the population fluctuations from one season } to another. This does not mean that heat has no effect on the algal community, but rather the effect is below the 2.1-8
. - = . . . - . . .. - _ . -
i i i statistical level of significance. l Seasonal trends of chlorophyll a biomass during 1977 are i i representative of previous years with comparable flow and temperature regimes. The high spring peak in chlorophyll a corresponds to the spring diatom community of Diatoma vulgare, Navicula salinarum var. intermedia, and Gomphonema olivaceum. This peak, found only in ambient stations, was followed by a
- small summer peak. The onset of the fall-winter diatom i
assemblages is evident in a rise in chlorophyll a biomass shortly before the termination of the study. Species composition data gathered during 1977 reflected close-similarity with those of previous years' data, indicating no-1 change in species dominance from the thermal effluent. i Cocconeis placentula, Diatoma vulgare, Gomphonema olivaceum, i Gomphonema parvulum, and Navicula salinarum var. intermedia remained the most stable elements of the diatom community. i Chroccoccus minimus and Phormidium faveolarum were dominant members of the Cyanophyta (see Table 2.1-5 for species list) . The periphytic community studied for the last nine years represents an important element in the trophic structure of } the river. Any severe impact to the algal community would t-
- probably be evident in-successive elements of trophic levels.
l The ability of these primary producers to recover in a short period of time has resulted ih a stable population since i 1969. During this time, there has been no evidence of detri-mental environmental impact on the periphyton community.- 4 The lack of adverse effects supports the deletion of the Monticello Nuclear Generating Plant Periphyton Program. 2 2.1-9 2 J
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e 1 l 2.1.5
SUMMARY
t 3
- 1. Three-way ANOVA statistics showed no significant effect on chlorophyll a biomass resulting from thermal effluent (
addition.
- 2. Species composition of the Misaissippi River near Monti-I cello, Minnesota rewained unchanged in 1977 with respect I to species dominance and seasonal population trends.
- 3. Chlorophyll A biomass trends during 1977 were representa-tive of previous years of comparable temperature and flow, f
- 4. During the nine years of periphyton monitoring, no l adverse environmental effects have been detected.
I i i i i
.E l
2.1-10
.__ _ _ _ - __--_----__ .-- 1
d l t 2.1.6 LITERATURE CITED Knutson, K. M. 1976. Attached Algae Studies in the Missis-i - sippi River at Monticello During 1976. M Environmental l i Monitoring and Ecological Studies Program, NSP Annual Report 1976. l Lorenzen, C. J.- 1967. Determination of Chlorophyll-and Pheo-
- pigments
- Spectrophotometric Equations. Limnol. Oceanogr.
! '12(3):343-346, 1 1 i-j s i i a - k i. i J i t 7 7 2.1-11
- ... - _ .. . . - - ~ . - - . _ _ . . . - - _ - _ - _ _ _ - _ . - . . .-._ . -..._-.-...-....-..---- - -... - . - .-. -. MI SSIS S I PPI RIVER PE R I P HYTO N STATIONS N i
. S TA. 2 8 A
PLANT \' STA. 3A -
~~ ~
S TA. 3 STA. . 7
~
~
.~ .
. +-
~ ' ,. . h
^
MONTICELLO LO l. 2 3 c ,, t '
! '? :sf - '
SCALE IN MILES ::;- h 3
~
F/GURE 2. /- /
WM -' MS O * 'b***' j ,, e UPPER UPPER M/SSISSIPP/ R/VER PER/ PHYT O N S A MPL ER u aoxnceuo,c. use auctene naur sl$
/
=.- , ' >, rse /g-.- .
s
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._ _ _q- ._ . =._ =..
N
. A g % -
~, ~ .
- I m
mn~ FIGURE 2./-2 .
Figure 2 1 Seasonal Chlorophyll a, Concentrations fo'< All Stations During 1977 p D 9' , g ,O tu
/ 1 1* ,
"8 g ,
U # g e- ,, a ' 0-
.$* ~
o
= -
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l l t l i __J" ! '! ) I _ _1d d - ! 7.0 -- l , , f Figure 2.1-4. 1977 Seasonal Variation for Chlorophyll a_,
= Temperature, and Current Velocity at Station 2 - . ,,
t 6.0 -- I M I n 5.0 l-6 s i o ' i
; s el4.0 --
a i I J m !
* 'I l3.0 =} ,
5 -l /\ l \ 2.0
/ \
& A r _
/ \ /. \ /
f <r N \ ' 10 % 7 (-- l MAY JUN JUL AUG i SEP
%f- OCT NOV DATE 2.1-16
i l I i 1 J- _ ao J[! ti_ I " i' ' '
- y- g ! (I - -.
n i s g2 ni T i \L e 10 7 ,
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1 v , , 3. 1 i Fii i i i i i t-i l ! l I ! I l ! !
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TTT4 i i ! , ,, i i e i i i t j i iIj ~
' j i !
1 g ! ! I l i ii i i l I i ! i l I ! I i I ! 7l l I
! I t I!! ! !
}--.d ! I 7.0 - !! ! !
Figure 2.1-5. 1977 Seasonal Variation for chlorophyll a, _, Temperature, and current velocity at Station 3 6.0 -
^ r '
l r f .__.- l -
- 5.0 : ' ' ' !
! n ! l .! l ! ! i i ! 6 i i ! >! I t ' hn
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j
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\ /
I i i y v 3
. 1 a 1 , , , ,e I MAY JUN JUL AUG SEP OCT NOV l DATE
'I i 2.1=17 1
- - - , - . - - . - . _ , - . < , - ,,,,-.,-w, ,---w, -
-,---+g-y 9 7,..- ,
I I ! j_I I I ' ! ! !
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+ ~Qdi i. j _- _l._._Q_bd i
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l ___.-~-t-l I l I I 2 l l _t Ml -*l l l i l- lLL Q_ l
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l
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' 7.0 Figure 2.1-6. 1977 Seasonal Variation for Chlorophyll a,
; !_, Temperature, and Current Velocity at Station 3 A l_.
I I I l I-i i j 6.0 -- j
. +-;
{f sl % f' g - f1 l
--- i l
' 1
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-i
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l ' 4 ! ! - i ii+-- i 5.0 N
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l l i el ' l l I ( I l l i i j i I I i <' 4 a -: i i i: -i ! i - da! _4 s : : l h: i_j l l ( ! i! -+.I -.i_s1 ! -
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+
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=
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AUG SEP OCT NOV MAY JUN JUL DATE I 2.1-18
1
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i
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44 < I i i i 4 7.0 1 ' ' i l i Figure 2.1-7. 1977 Seasonal variation for Chlorophyll a, i
.N~ Temperature, and Current Velocity at Station 7
~
4 l 6.0 !' I i! i
! I l , 5.0 - - -
n ! ! , .
! ! l 4
8 II Tl . 4 i b J' i i i ! ! ! el 4'O i a . i
< i
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- " 3.0 l a I
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i
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_i A / \ / \- / l 4 1.0 ;/' h/ \/ \\ jf / I
/
1II i X / i u ! 1 u w I MAY JUN JUL AUG SEP OCT NOV DATE
-2.1-19 a 'a v- . ~ , . . , - r - - , . - - , + +r,
.,m . . - . -
g i i I t I t
!. __j -
Q ! - 30 - b-- !
.o p n %
_.,q :
, je 20 - g ; j7 '
l . 10
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j l , -( , -j~ ! l l t ! I I i l t l ! ! ! i > 1 1.0 -
- ; 9 s i r w
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- s 7 ; e 3 W"5 /NN- -
- -*-L-l l l l/L/
l l l _q -- l l l l i i ii j I
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l l __1__!- !_l. l ! !! , , _i l l 1 I ! I L * ' i l I 7-7.0 - 1 s Figure 2.1-8. 1977 Seasonal Variation for Chlorophyll a, - i._ , ! Temperature, and Current Velocity at Station 11_ } ! I ( i i , 6.0 - ! ~
! 5.0 - l\
n Il\ B - I\ !
- s i l 1 4 I #
i0 -[ f , i l ' l :) - I' V \
- e 1 i
j E i 230 -- r { I i 4 8 m j' l u g f g
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N \ Y '\ 11 / \ f- A 1 \
# DW [ \
t a 1.0 .b w
\
\ $
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l- 1. l l- %n . MAY JUN JUL AUG SEP OCT NOV 2
- DATE
- 2.1-20 s
- - - ~ - - - - . , . , .-,_.,.,-,,,,,,,,y mvy..w.w,,-,,,,,,,.m.,%,yyy.yy,-,y..ww w- y e m w. y ,, - - , , , ,
b Table 2.1-1 1977 Sampling Schedule, Mean Ambient River Water Temperatures, Mean River Discharge, and j Plant Off-Line Time. Mean River Water Mean Ambient River Plant Off-Line Time Sampling Periods Days Discharge *(cfs) Water Temperatures *( c) Days Date a J
- 1. 13 April-26 April 13 3396 13.4 0.5 19 April
- 2. 26 April-09 May 13 3174 16.1 g 3. 09 May-24 May 15 2023 21.2
- y. 4. 24 May-07 June 14 2321 23.1
. u
" 2022 21.8 3.7 10 June-14 June
- 5. 07 June-22 June 15
- 6. 22 June-06 July 14 2247 24.1 2.2 25 June-27 June I 4 ;
~
- 7. % July-20 July 14 2763 25.5
- 8. - 20 July-03 August 14 1771 24.6 t ,9. 03 August-17 August 14 1325 22.2 i
- 10. 17 August-31 August '14 1303 20.5 i
- 11. 31 August-14 September 14 3584 19.6 l 12. 14 September-28' September 14 4002 16.7 09 September-i 13.- 28 September-12 October 14 5400 12.8 ,> 62.0 19 November j s-i
l l Table 2.1-1 -1977 Sampling Schedule, Mean Ambient River Water Remperatures, Mean River Discharge, and i l Plant Off-Line Time (continued). , i 1 i Mean River Water Mean Ambient River Plant Off-Line Time Discharge a(cfs) Water Temperatures a (oc ) Days Date Sampling Periods Days or I i 14. 12 October-26 October 14 5580 8.3 s 26 October-10 November 14 5399 9.1 l 15. I l-w
- g. ! 210 days s . .
M i N
- aData obtained from Monticello Nuclear Generating Plant Computer readout I
4 h 4 i I i
+
e . i a O- , ,
- . - - - . - -. _..- - . - ... . . - .=. - - . - - - - - . . . -
h J l Table 2.1-2 1977 Chlorophyll gConcentrations at Each Station Expressed as pg/cm2 / sampling period
! Collection Date' Station 11 2 3 3A 7 i 26 April 7.89 6.22 0.68 7.59 -2.31 ! 09 May 0.99 1.00 0.68 0.98 l'.78
! 24 May 2.84 ---- 0.92 1.53 5.42 f 07. June 0.88 0.93 1.16 0.91 1.00. ] i 22 June 1.21 1.65 1.67 1.83 1.41 06 July O.94 1.56 0.95 0.85 1.15 i 20 July 0.87 0.93 1.37 1.66 1.06 j 03 August 0.78 0.41 0.22 2.61 1.87 i j 17 August 1.13 0.86 1.16 3.02 ---- 4 1 -- 31 August 1.98 0.49 0.39 2.68 2.10 i 14 September 0.28 1.09 0.54 2.04 1.55 28 September 0.33 0. 7'4 1.29 -1.03 0.49
, 12 October 0.17 0.22 0.91 -0.26 0.23 26 October 0.24 0.21 0.29 0.18 0.07
[ 09 November 1.48 2.18 0.46 1,51 0.64 i
- Seasonal Mean 1.47 1.32 0.85 1.91 1.51-1 T
s-l t N e 4 L 4 . 2.1-23
- - . . - . - - - . - . . - - . - - - - -.=
l I I i
! Table 2.1-3 1977 Percent Chlorophyll i Values for Each ,
Station. Percent Chlorophyll g = Chl 1 x 100 Chl 1 + Phao a Collection Date Station 2 3 3A 7 11 ! 26 April 99 92 54 100 92 09 May 74 81 42 86 89 24 May 88 -- 48 53 94 l i 07 June 80 81 38 x85 80 22 June 90 82 71 94 83 06 July 84 79 76 95 89 j
' 59 96 92 20 July 93 73 i 03 August 88 66 64 96 92 17 August 79 87 68 92 --
31 August 96 65 57 91 83
- 14. September 63 84 66 93 96 28 September 88 83 84 85 84 12 October 72 84 84 87 90 26 October 89 98 81- -75 58 09 November 98 100 86 '
100 lod 1 Seasonal Mean 85 82 65 88 81 k I l l l 1
,, 2.1-24 . _ .
I
-. - y - _ y --,.,,-,,,,,,~c
4 . i
- Table 2.1-4 1977 Phaeophytin g Concentrations at Each
, Station Expressed as pg/cm2/ sampling period l Collection Date Station 2 3 3A 7 11 26 April 0.07 0.52 0.56 0.00 0.19 j 09 May 0.35 0.24 0.92 0.16 0.21 24 May 0.39 ---- 0.99 1.31 - 0.30
- 07 June 0.22 0.22 1.85 0.16 0.25 t i 22 June 0.13 0.36 0.67 0.10 0.28
~
j 06 July 0.18 0.41 i 0.29 0.04 0.14 l 20 July 0.07 0.34 0.95 0.06 0.09 03 August 0.10 0.21 0.12 0.10 0.15
- i 17 August 0.29 0.13 0.52 0.23 ----
4
- 31 August 0.09 0.27 0.29 0.26 0.42
, 14 September 0.16 0.21 0.28 0.15 0.06 2S September 0.05 0.15 0.24 0.18 0.09 12 October 0.07 0.04 0.17 0.04 0.02 g 26 October 0.03- 0.01 0.07 0.06 0.05 09 November 0.03 0.00 0.10 0.00 0.00 4 1 e l- . 2.'l-25
Table 2.1 ". Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 26 April 1977 Station Species 2 3 3A 7 11 Blue-Green Algae 5,610 40,290 510 510 10,200 Chroococcus minimus 2,550 0 0 Phormidium faveolarum 510 0 510 1,530 0 0 0 quirulina subtillissima Green Algae 6,630 0 0 Scenedesmus sp. O O 0 0 39,780 0 0 Stiaeoclonium nanum Diatoms 3,950 0 0 Achnanthes exigua 0 1,975 0 0 1,975 0 0 Achnanthes lanceolata 1,975 3,950 1,975 0 0 g Asterionella formosa 7,900 3,950
- Cocconeis pediculus 9,875 1,975 0 g,
3,950 51,350 11,850 5,925 9,875 Cocconcis placentula var. L
- euglypta 1,975 1,975 5,925 33,575 3,950 l
Cyclotella meneghiniana 31,600 1,975 0 11,850 0 Diatoma clongatum 31,600 3,950 17,775 9,875 7,900 Diatoma vulgare 67,150 7,900 33,575 110,600 13,825 Gomohonema olivaceum 3,950 1,975 Melosira granulata 80,975 0 0 O 5,925 31,600 1,975 0 Navicula grac ilis 3,950 1,975 3,950 0 3,950 Navicula hungarica var. cap-itata 5,925 41,475 1,975 1,975 0 Navicula salinarum var. intermedia 1,975 7,900 1,975 1,975 3,950 Nitzschia acicularis 5,925 0 3,950 3,950 0 Nitzschia dissipata 9,875 0 0 1,975 0 Nitzschia Dalea 25,675 1,975 5,925 Stephanodiscus niagarae 0 1,975
[' > > 1 0 5 1 5 7 9 9 3 1 0 7 5 o 9 l 0 , l 3 e cr
- i e tt ne om n Mi o 0 t i A 5 rn t 3 9 ae a ,
0
- eC t 3 n ) S ed
. rre eau vun i qi RSt n ipec ro pp( 3 0 0 0 5 i 9 9 ss7 , , sl7 7 3
- il9 se1 sC i l Msi e
arp 0 0 hdA t e 2 5 5 9 9
. s6 , ,
f s2 3 3 oe r ep ax gE _ l _ As r d e _ eb h m cu aN t t A . s 5 e s i n
- c e p
1 e a
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. l a a b r r a d d T s e e m n n o y y t S S a
i D eWIo4t
' ;. . : 1
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Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 09 May 1977 Station Species 2 3 3A 7 11 Bluegreen Algae Chroococcus minimus 39,780 34,170 510 14,'90 14,790 Oscillatoria sp. 0 0 510 0 0 Phormidium faveolarum 0 0 6,120 510 0 Green Algae Characium pringsheimii 0 0 367,710 0 0 Stigeoclonium nanum 0 3,570 23,460 0 0 Diatoms Achnanthes exigua 0 0 1,975 0
" 0 1,975 3,95d 0 1,975 . Achnanthes lanceolata var.
7 cmissa y Ampitora perpusilla 1,975 O_. 0 1,975 0 Asterienella formosa 13,825 C 0 0 0 Cocconeis pediculus 19,750 5,925 0 1,975 0 Cocconeis placentula v?.r. . euglypta 5,925 51,350 9,875 3,950 5,925 Cyclote31a meneghiniana 1,975 3,950 33,575 3,950 1,975 Diatomp u longatum 23,700 0 7,900 25,675 7,900 Diatoma vulgare 31,600 0 0 27,650 9,875 Fragilaria capucina 3,950 3,950 73,075 7,900 11,850 Gomphonema olivaceum 80,975 5,925 1,975 124,425 3,950 ^ Gomphonema parvulum 5,925 51,350 73,075 1.,975 3,950 Navicula gracilis 3,950 1,975 0 3,950 1,975 Navicula salinarum var. 1,975 3,950 23.700 5,925 0 intermedia Nitzschia acicularis 0 1,975 5,925 3,950 0 , Stephanodiscus niagarae 5,925 5,925 23,700 0 0 synedra actina steraides 43,450 9,875 3,950 11,850 7,900
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 09 May 1977 (continued)'. Station Species 2 3 3A 7 11 Diatoms Synedra rumpens 11,850 3,950 1,975 O O Synedra ulna 5,925 0 0 0 o u o b I M
~
- -- .~
, gA m. , gr mm. nad 1 4-
' Table.2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter f 24 May 1977 ,
j
' i l
Station f & Species 2 3 3A 7 11 Blue-Green Algae 46,920 214,710 33,660 163,710 6,630
-Chroococcus minimum 1.020 8.670 8.160 510 4.080 ,
Ph'rmidium o faveolarum 0 510 3.060 snirulina subtilissima 1.530 Green Alcae 1,530 0 0 O 510 Sticeoclonium nanum 0 0 510 0 Clost4rium sp. 0 ; i Diatoms 1,975- 0 0 5,925 , 5,925 i Achnanthes lanceolata var. ! ' lanceolata- '1,975 73,075 25,675 5,925 0 , [3 Achnanthes minutissima 3,925 0 1,975 0 3,950 y Cocconeis pediculus 75,050 17,775 0 13,625 67,150 g Cocconeis placentula 280,450 199,475 161,950- 1,975
- Cocconeis placentula var.
euglypta ' 19,750 3,950 0 O O Cymbella ventricoca 1,975 23,700 1,975 1,975 0 '- Diatoma vulgare- l 33,575 0 3,950 25,675 0 Gomphonema angustatum 39,500 41,475 0 29,625 0 Gomphonema'olivaceum 41,475 100,725 238,975 0 35,550 4 Gomphanema parvulum 5,925 1,975 7,900 33,575 1,975
' Navicula gracilis 3,950 0
? Navicula salinarum var. 15,000 1,97[~ O f intermedia 0 0 5,925 0 Nitzschia dissipata 13,825 i 0- 1,975 15.f 800 1,975-Nitzschia palea 5,925 ~ ] 1,,925_ 3,950 17,775 0 Nitzschia romana - O f 1,975 1,975 3,950 3,660 0
'sunaara rnmnana 21,975 3,95'O O 1,975- 0 t S'ynedra uln'a i ll i
) i L
/ - -
i . . . .
~ . l -
- -e r '
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 07 June 1977 Station Species 2 3 3A 7 11 Blue-Green Algae' 0 510 3,060 0 0 Chroococcus minimus 10,200 510 0 1,020 1,020 Phormidium faveolarum Green Alcae Characium pringsheimii 0 0 22,440 0 0 Diatoms 3,950 Achnanthes exigua- 1,975 1,975 5,925 0 51,350 136,275 86,900 15,800 90,850 Cocconeis'placentula
" 7,900 0 1,975 0 0
. Diatn== vulaare 77,025 0 3,950 33,575 0 7 Gamphonama olivaceum 15,800 41,475 43,450 0 -77,025
$ Gomphonema oarvulum J
11,850 -3,950. 5,925 5,925 0 Melosira varians 1,975 5,925 Navicula hungarica .1,975 1,975 1,975 Navicula salinarum' var. 0 0 3,950 1,975. ! intermedia 21,725 O 1,975 0 0 0 Navicula exicua Nitzschia palea 1,975 0 0 3,950 0 3,950 0 1,975 1,975 0-Nitz'schia romana 0 5,925 Synedra rumpens 5,925- 0 0 11,850 0 0 < 13,825 3,950 synedra ulna l-I l: [
,g
_,4p
-%,, p i% M li wW. _.-@- 5yg h?
Table 2.1-5. Attached Algae of the Mississippi River near Monticello. Numbers Expressed as Cells per Square Centimeter 22 June 1977 Station Species 2 3 3A 7 11 Blue-Green Alcae 51,000 24,990 10,710 45,390 10,710
' Chroococcus minimus. 0 1,020 0 0 Oscillatoria amphibia 1,020 0 510 1,530 3,570 66,810 Phormidium faveolarum Green Algae 80,070 0 0 0 71,910 Characium pringsheimii
' Diatoms 1,975 13,825 1,975 7,900 0
'Achnanthes lanceolata 0 3,950 0 0 0 Achnanthes'linearis- 278,475 304,150 3,950 317,975 337,725 Cocconeis placentula 1,975 7,900 5,925 i 3,950 Cocconeis pediculus' var.euglypta 33,575 0 7,900 1,975
" 13,825 1,975
. Diatoma vulgare 0 35,550 47,400 p
357,475 15,800-I 'I- Gomohonema'olivaceum 343,650 94,800 0 80,975 120,475 U Gomphonema - parvulum 5,925 0 5,925 0 3,950
-Navicula'salinarum var.
intermedia 0 0 0 - 1,975 Navicula gracilis 0 0 1,975 1,975 0 Nitzschia dissipata 1,975 i 0 3,950 3,950 0
- Synedra ulna 3,950 t
O O
*
- 9 O , _ , _
I 1 Table 2.1-5. LAttached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 06 July 1977 Station Species 2 3 3A 7 11 - Blue-Green Algae Chroococcus minimus 109,140 24,990 116.280 1.020 510
'Oscillatoria amphibia 0 1,530 8.670 1.530 1.530 .;
Phormidium faveolarum 10,710 7,140 32,640 2,040 1.530 4 Green Algae a Characium pringsheimii 0 0 36,210 0 0 Stigeoclonium nanum 0 510 6.630 0 . 0 Diatotus u 'Achnanthes exiqua- 0 5.925 7.900 0 1_ 97 c; r Achnanthes: lanceolata- 1,975 0 1.975 1.975 3.950 i- b Achnanthes lanceolala var. 61,225 395.000 35.550 61,225 3.950 3 omissa Cocconeis placentula 219,225 33,575 3,950 195,525 1,975 Cymbella ventricosa- 7,900 1,975 0 9,875 0
- Gomphonema parvulum' 7,900 11,850 0 5,925 31.600 i
Gomphonema parvulum var. 23,700 80,975 0- 19,750 9,875 , micropus i -Navicula.hungarica- 1,975 0 1,975 1,975 1,975
. Navicula rhyncocephala 1,975 0 0 3,950 3,950 f
l Nitzschia palea 0 5,925 7.900 11.850 13.825 i- Synedra rumpens 1,975 3,950 0 5.925 0 l e i' l: i i
. _ , . . ~ . .- . - - - .
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter , 20 July 1977 Station Species 2 3 3A 7 11 Blue-Green Algae 71,400 30,090 102,000 76,500 4,590 Chroococcus minimus 3,570 0 1,530 Phormidium favosum 2,040 510 7,140 16,830 14,790 1,530 45,900 Phormidium faveolarum Green Algae 0 1,020 122,910 0 Characium pringsheimii 510 0 0 0 Closterium sp. Diatoms 1,975 0 159,975 51,350 80,975 Achnanthes lanceolata var. f omissa 1,975 0 0 11,850 1,975 i y Achnanthes linearis 355,500 0 67,150 1,975
- Cocconcis placentula 237,000 f ,
1,975 0 0 5,925 1,975 y Cymbella ventricosa 3,950 0 0 3,950 3,950 i A Gomphonema olivaceum 1,975 1,975 7,900 0 0 ; Gomphonema parvulum 1,975 1,975 Gomphonema parvulum var. micropus 15,800 238,975 0 0 3,950 3,950 1,975 3,950 ; Melosira varians 3,950 5,925 l 3,950 5,925 0 I Navicula salinarum var. Latermedia 5,925 0 Nitzschia palea 7,900 0 0 13,825 1,975 0 5,925 0 Nitzschia romana
. g .
C_.
t
,...w.. .. l?_ _ . -. , - , -. -.
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter I t 03 August 1977 l l Station Species ! 2 3 3A 7 11 Blue-Green Algae Calothrix membranacea. 0 510 0 61,710 0 Chroococcus minimus 102,000 95,880' 95,880 0 107,100 Phormidium favosum 3,570 0 16,320 0 0 Phormidium faveolarum. 78,540 3,570 20,910 3,060 44,880 Green' Algae i 1 Closterium sp. 510 0- 0 0 0
- m. Diatoms
- i g Achnanthes exiana 0 1,975 17,775 0 0 '
d, Achnanthes lanceolata var. 17,775 -3,950 5,925 3,950-
- 57,275 !
lanceolata Achnanthes lanceolata' var. , omissa. 9,875 1,975 0 1,975 120,475 Cocconeis placentula 278,475 371,300 13,825 357,475 363,400 Cymbella tumida 3,950 0 1,975 0 1,975 Gomphonema parvulum 7,900 0 23,700 0 349,575- ; Gomphonema parvulum var. micropus 86,900 0 37,525 0 _ 33,575 Navicula exiqua 1,'975 3,950 0 1,975 0 Navicula salinarum var. 5,925 1,975 0 3,950 3,950
' intermedia.
- Nitzschia palea 5,925 3,950 7,900 0 0 Nitzschia romana- 1,975 0 3,950 3,950 0 t Synedra ulna var. 0 0 0 1,975 5,925 .
oxvrhynchus ' t
-- - -- ^ * ~ ~ ~ ~ ^ ~
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 17 August 1977 Station Species 2 3A 7 3 11 Blue-Green Algae
-Chroococcus minimus 124,440 148,410 71,910 41,310 107,100 Phormidium favosum 2,040 O- 0 0 0 Phormid.cm faveolarum 10,710 1,530 0 0 7.140
. Green Algae Stigeoclonium nanum O 510 510 0 O' !
Diatoms j Achnanthes. lanceolata var. O' 1,975 3.950 0 1.q75 lanceolata . Achnenthes lanceolata var. I w omissa 23,700 1,975 17.775 1.975 0 b Achnanthes linearis 11,850 0 19,750 3.950' 17.775 i E Cocconeis pediculus 5,925 3,950 1.975 7.900 3.950
- Cocconeis placentula 225,150 237,000 179,725 120,475- 317,975
- Cymbella tumida 1,975 0 3,950 0 1,975 j Diatoma elongatum 1,975 0 0 0 0 Gomphonema olivaceum '7,900 'O O 1,975 0 i- Gomphonema parvulum var. O O 1,975 15,800 3,950 '
micropus i Navicula salinarum var. 3,950 3,950 3,950 0 5,925' 4 . intermedia j Nitzschia palea 3,950 5,925 0 1,975 O l j Nitzschia'romana- 1,975 3,950 0 0 0 l l Synedra ulna O 1,975 0 1,975 3.950 i t 1 . . j . - . .
._ .m._. .__ .. _ . _ .-_ _ ... _ .. _ .._ _.. _ . _ ..._ _ _ .. _ .-- _--_, _ . _ _ . _ _ _ _ . _ . _ _ . . . . _ . . . - . _ . . . _
- _. . . . . _ . . . _ . _ . _ ~ . _ . . _ _
- j. rable 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells'per Square Centimeter -
31 August 1977
.l Station
, Species 2 3 3A 7 11 Blue-Green Algae Chroccoccus minimus 128,010 61,710 133,110 108,120 95,880 Phormidium favosum 0 0' 2,040 0 0 'i
~Phormidium faveolarum 16,830 0 3,060 0 0 i i Green Algae Stigeoclonium nanum 1,530 510 0 0 510 j- Diatoms l- Achnanthes lanceolata var.- 3,950 0 75,050 0 -3,950 u lanceolata g Achnanthes lanceolata var. 21.725 3.950 41.475 0 3.950-i omissa
'3' Achnanthes linear'is 1,975 1.975 13.825 1,975 5,925 Cocconeis pediculus 3.950 0 0 3.950 0 .
t l Cocconeis placentula 73,075 238,975 258,725 240,950 317,975' Cymbella tumida 1,975 0 0 1,975 1,975 ' Epithemia'sorex 0 1,975 3,950 0 0
- Gomphonema olivaceum 61,225 0 0 0 1,975 l Gomphonema-parvulum 27,650 0 0 0 3,950-Melosira varians '15,800 3,950 1,975' 3,950 5,925 f Navicula salinarum var. 11,850 0 0 5,925- 0 intermedia l
, Nitzschia dissipata 5,925 1,975 1,975 1,975 0 { Synedra ulna 1,975 0 0 3,950 0
- j. ...
i'
-i
_ _ _ . _ _ . _ . - _ _ _ ~ ~_ _ Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 14 September 1977 Station l Species 2 3 3A 7 11 Blue-Green Alone 71.910 95.880 10.710 108.120 22.440 Chroococcus minimus 1.530 0 1.020 2.040 Phormidium favosum 1.530 1.020 10.710 1.030 5.100 Phnrmidium faveolarum 2.040 O 510 0 0 Soirulina subtilissina O Green Alcae 0 510 _ O Stiaeoclonium nanum 510 0 __ Diatoms O 7.900 1.975 0 33.575 Achnanthen lanceolata var. lanconinen 0 55.300 O 3.950 1.975 g Achnanthes lanceolata var.
+ omissa 13,825 53,325 0 55,300 23,700 7 Cocconeis pediculus 114,550 110,600 337,725 341,675 Cocconeis placentula 284,400
$ 5,925 238,975 0 0 82,950 Gomphonema parvulum 3,950 0 317,975 7,900 55,300 Gomphonema parvulum var.
micropus 0 1.975 0 0 0 Navicula decussis 0 0 3,9.50 0 Navicula castrum 3.950 3,950 0 0 1,975 5,925 Navicula salinarum var. intermedia 5,925 1,975 7,900 1,975 41,475 ; Nitzschia fonticola 0 1.975 3.950 1.975 Rhoicosphania curvata 1.975 Q O
~~ '
Table 2.1-5. Attached Algae of the Mississippi River near Monticello Numbers Expressed as Cells per Square Centimeter 28 September 1977 Station Species 2 3 3A 7 11 nium-Green Algae-Anabaena so. 510 0 510 1.020 0 chroncoccus minimum 1.020 -*
- 15.810 1.020 0 Phormidium faveolarum 1.530 510 1.020 0 0 . i Green Alcae I Characium urinasheimii 0 0 20.910 0 0 Diatoms Amohora ovalis 0 0 0 3.950 0 Cocconeis pediculus 5.925 7.900 7.900 1.975 3,950 1 cocconsin niacantula 73.075 77.025 13.825 35.550 11.850 Y Cocc.nein olacmntula var. 23.700 5.925 17.775 55.300 0
$ eucivota cymbella tumida 0 1.975 11.850 0 0 Diatoma vulgare 3 3 . <*a 27,650 13,825 1,975 23,700 Fracileria leptostauron 3,950 1,975 0 0 1,975 Gomphonema olivaceum 17.775- 0 0 1,975 1,975 Gomphonema parvulum 3,950 1,975 1,975 3,950 '3,950 Gomphonema parvulum var. 5.925 13.825 3,950 3,950 5.925 micropus Melosira varians 7,900 0 1,975 13,825 11,850 Navicula oracilis 0 1,975 9,G75 11,850 9,875 Navicula salinarum var _ O 7.900 27.650 13.825 41.475 intermedia Nitzschia amohibia 3,950 0 O_ 0 0 Svnadra ulna 1.975 1,975 C 3,950 5,925
' " ' ' ~
! ji 6 1
1 1 7 o l _ l e cr i e _ t t ne om n o Mi t i A rn t 3 ae a eC t n S e rr ea vu i q RS i r pe 3 pp i ss 7 sl 7 il se 9 1 sC i r Ms e e a bo hd t ,t
~ ,_ t e c f s s O oer 21 ep 4 ax gE l
As o r t d e s eb e e h m u i cu D t aN i t s s t o n A l e p D s m
. e a l 5 i S l
- c e 1 e e C
. p v 2 S i w t o
_ e a L o _ l t _ b i v a t l _ T n e am ' u e
- O r t
ox N E _ o.WtbO t
, [ > L : - 1 . 1 7
o l l e cr ie tt ne _ om n Mi o t i A rn t 3 ae a eC t n S e rr e ea vu iq RS i r pe 3 pp i ss sl
- il se
. sC i 7 Ms 7 a 9 . e 1 hd 2 t e r s e foes b o r t ep c ax gE O l 6 o As 2 t r s d e e e eb u i h m D t cu i _ aN s s t e n t l e A p D m s a l e S l 5 i e
- c e C 1 e v P i w 2 S t o a L e t l i y
_ b t l a n e T a m
, u e Q r . t o x
_ N E
- n. IbH
- ~~
Table 2.1-5. Attached Algae of the Mississippi River near Monticello i Numbers Expressed as Cells per Square Centimeter 09 November 1977 Station Species 2 3 3A 7 11
- j. Blue-Green Algae Chroococcus minimus 510 0_ 10.710 0 0 Phormidium faveolarum O O 3.060 0 0 Green Alcae Characium pringsheimii 0 0 20,400 0 0 Diatoms Cocconeis pediculus 1,975 3,950 3,950 1.975 3.950
! Cocconeis placentula 3,950 13.e25 7.900 3.950 0 Cvmbella tumida 1.975 0 0 3.950 1.975 DiatO== eloncatum 25.675 2.3.700 11.850 27.650 31.600 Diatoma vulgare 100.725 80.975 33.575 55.300 41.475
.u Gomphonema parvulum 7,900 3.950 0 1.975 1.975 Y Gomphonema parvulum var. 3.950 1.975 0 1.975 3.950
- r .
w micropus Navicula origua O n O 1.975 0 13_R75 3_950 1.97% 71,700 1_qqn
- Navicula gracil in 1 Navicula salinarum var. 5,925 13.825 23.700 1.975 1.975 I intermedia j Nitzschia acicularis 1,975 0 19,750 0 0 Nitzschia nalea 5.925 5.925 1.975 3.950 0 f Synedra ulna O 1.975 0 5.925 3.950 synedra ulna var. 1.975 7.900 5.925 5.925 1.975 oxyrhynchus 9 4 g
1 MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL MONI'IORING PROGRAM 1977 ANNUAL REPORT i A SUtiMARY OF THE 1977 MONTICELLO-SHERCO CREEL SURVEY (2.2) 1 Prepared for i ' Northern States Power Company Minneapolis, Minnesota 1 1 l j by l G. D. Heberling and l J. W. Weinhold Environmental and Governmental
, Activities Department Northern States Power Company
- 2. 2-1
-.-- - -..---._ _.-_-.. . - - - _ - - . . _ . - . ~ . - . - . . _ _ . - . ..- -
l 2.2 A StMMARY OF THE 1977 MONTICELI4-SHERCO CREEL SURVEY f . :
, -2.
2.1 INTRODUCTION
j The sixth season of a continuing angler creel survey was con-ducted on the Mississippi River near Monticello from May-14
, through October 16, 1977. Ninety days were sampled during this-156-day period, which encompassed a majority of the annual
{ fishing pressure for this river section. Six creel survey 4
- stations were used to collect data on angling-pressure and recreational use of the river (Figure 2.2-1) . These stations j .
were the same locations employed by the 1974, 1975, and 1976 l , studies. 1 2.2.2 MATERIALS AND METHODS I i l j The angler population was sampled by a stratified random creel [ . survey, as described in the 1974 Northern-States Power Mont-icello Annual Report. As in previous years, the survey consisted f' i of two parts: angler interviews and' instantaneous counts on the j
-' number .of fishermen and boats. _ Sampling-was-conducted on.every -t weekend during this study period; two weekdays were also ran-l, domly sampled each week. The survey clerk was positioned-at one i
j station for ' a con.plete day. While at the sampling site, the. I clerk made ten instantaneous counta daily 'at hourly. intervals.
- I .He also conducted-as many'interviewsiwith fishermen as possible.
.l .
Information~from this survey was then compiled and submitted i j . 1 . ., 2.2-3 j
. _ .-__. - . _ . - - _ _ _ - - - .-. .- - _=. .
i 4 i j for analysis under the computer program " CRAPPIE" (Creel
! Results Application Program Providing for Industrial Ecology) ,
for estimates of angler pressure and harvest. l i 2.2.3 RESULTS Table 2.2-1 gives the number of instantaneous counts, number ' i of fishermen counted, and the estimated fishermen hours por !
- site. In total, 900 instantaneous counts were made, 804 fishermen were counted, and an estimated 11,673.86 man-hours
{ were spent fishing. , I Table 2.2-2 presents the overall catch rates for the species ! of fish caught by sampling site. In total, 857 fish were caught at a rate of 1.398 fish per man hour. i Catch rates for the species of fish that were sought is presented in Table 2.2-3 by site. The overall rate of success for species sought was 1.201 fish per man hour. The estimated harvest, in numbers and kilograms, was. computed for each sampling site and is given in Table 2.2-4. Some species of fish were caught incidentally to the species of fish that were sought. As a consequence, many of the species l I that were not desired, or fish that were too small , were re-leased. These fish were excluded from the harvest estimates. i /
; The total harvest estimate was 4,522 fish, or 2,065 kg.
As in all previous studies, most angling was done from shore. However, unlike earlier years, leisurely fishing attitudes , did not persist and anglers made a concerted effort to f
. 2.2-4
1 locate fish. Forty-eight percent of the anglers continued to use l
. natural bait. Artificial lures were utilized by 37 percent of the fisherman, 4 percent used prepared bait, and 12 percent used a combination of artificial, natural, or prepared bait. A majority of the anglers (58 percent) were Twin cities residents, and I 25 percent came from the Monticello area. Most fishing was conducted on weekends and holidays (three Mondays during the period), with the following daily pressure distribution: Sunday 29 percent, Monday 33 percent, Tuesday zero percent, Wednesday 11 percent, Thursday 5 percent, Friday 7 percent, and Saturday 15 percent.
2.2.4 DISCUSSION The total 1977 fishing pressure estimate of 11,674 man-hours was l 102 percent greater than the previous year's creel census estimate, reflecting a substantial increase in recreational use of this section of the Mississippi River. As in previous years, access-ibility of the fishing sites strongly governed the mmount of l > fishing pressure. Montissippi Park had the highest fishing l ' l pressure with 3,514 man-hours. The lowest pressure estimate was j l made at the controlled access of the Monticello Nuclear Generating
, Plant discharge canal site (552 man-hours) .
l 1 Seventy-five percent of the angling pressure was directed toward l l smallmouth bass as compared with 21 percent in 1976. Ten percent f of the anglers fished for anything, five percent for carp, five percent sought crappies, and four percent fished for walleyes. The 1977 catch rate for all species combined was 1.398 fish / man-hour. Anglers commonly pursue fish they are most successful
; at catching. This held true for smallmouth bass in 1977, l
2.2-5
m, - - . _ _ _ _ _ . _ _ _ . _ -_. _ _ . _ _ - - _ _ _ . _ . _ _ _ . _ _ _ _ 1 1 s i l which had the highest catch rate at 1.233 fish / man-hour. l carp were second at 0.082 fish / man-hour and walleye third at , j 0.029 fish / man-hour. The, remaining fish had successively
! I lower catch rates. Tarzan Elms had the highest rate of i
success, 2.239 fish / man-hour, with River Terrace being least s a productive at 0.360 fish / man-hour. I 4 ! Table 2.2-5 shows that 1977 anglers had the highest catch rate l in the six-year creel survey. Smallmouth bass was the pri-
~
mary contributor to this high rate of success. catch rates ] ' ! for other species were consistent with data from previous i years. l a i The tremendous increase in angling success for smallmouth bass is attributable to their very strong-1976 year class. 1 ! i Large bass were also caught in greater quantities than in - ! previous years. However, a majority of smallmouth bass Vere f l in the 0.2 to 0.3 kg or 170~to 250 mm range ~(1976 year class), These yearling fish were taken by most angling-techniques and i ! were apparently enjoyable to catch, as indicated by the in- ! creased angling pressure. i i i The total 1977 harvest estimate for the six' census sites was i 4,522 fish and 2,065 kg.- These harvest estimates were over nine times greater by number and seven times greater by. 1 weight than the 1976 estimate. i l l . .
~
2 Montissippi Park had the largest harvest estimate of 1,598 . A fish and 772 kg, whereas Tarzan Elms was second with 977 fish and 373 kg. The remaining sites had progressively lower , harvest estimates, with the Monticello Plant's discharge canal i I' [ l 2. 2-6 1-
- - _ _ - =.__ -__-.=u._ _ _ . . . _ . . _ _ _ _ _ . . . . _ . _ _ _ . . _ , _ , _ _ . , , , , _ . . _ , .
i having the lowest with 177 fish and 63 kg. 2.2.5 SUMHARY 1
- 1) The 1977 angler creel survey was conducted on 90 days i
from May 14 to October 16, 1977.
- 2) Total fishing pressure estimates for all sites combined 1
was 11,674 man-hours (102 percent greater than those of 1976).
- 3) The combined catch rate was 1.398 fish / man-hour. This is nine times greater than the fishing success exper-lence in 1976.
- 4) Seventy-five percent of the anglers were fishing for smallmouth bass, ten percent fished for anything, five percent for carp, five percent sought crappies, and four percent fished for walleyes.
- 5) The total harvest estimate was 4,522 fish, or 2,065 kq.
- 6) The strong 1976 year class of smallmouth bass became recruitable in 1977. The abundance of these yearling fish and their vulnerability resulted in elevated catch rates and created increased fishing pressure in 1977.
f-I h 2.2-7
SITE 1 e
, ,, (NE LSON'S LAMOING) f s-4, SCALE I
O 1
/S,, b
+
%y y w
"M %
'WMN k NONTICELLO NUCLEAR GEAERATING PLANT v
%z%
SITE 2 b (TAnZAN ELMS) P (SIS (MNS PAfWO SITE 3 (DISCHAn9E CANAL) Figure 2.2-1 SITE 5 LOCATIONS OF SAMPLING SITES FOR THE MONTICELLO - SHERCO SITE 6 CREEL SURVEY (RwEn TennAct TnA Len nnneo ( 1977 )
=
e
_.. . . . .. - . . _ . _ . _ _ _ . . . _ . _ _ . _ _ . . . . .m... .__ ..__m ._. _ _ . . .
. . +
TABLE 2.2 Miscellaneous Stati stics 1977 MONTICE1.ID - S!ERCO CREEL CENSUS Site #1 Site e2 Site e3 Site #4 Site 45 Site +6 TOTAL l NO FISHERMAN COUNTED 117 122 38 91 242 194 804 NO INSTANTANEUUS COLTTS 150 150 150 150 150 150 900 ESTIMATED FISHERMAN-fE*URS 1698.04 1771.44 551.76 1321.32 3513.84 2816.88 11673.86 i TABLE 2.2-2 fRNBER OF FISH AND REAL OVERALL CATCH RATES I
.I EXPRESSED AS FISH / MAN-HOUR FOR SPECIES CAUCHT .Y.
Site #1 Site #2 Site 83 Sate #4 Site #5 Site e6 TUTAL SPE".IES Caught Fish M Caught FishNJER Caught Fish Nl!R Caught FishAHR Catr7ht Fi sh/9tHR Caught Fi sh/DtHR Caught FisAh walleye 4 0.040 9 0.074 0 0.0 0 0.0 4 0.020 1 0.009 18 0.029 Smallmouth base 125 1.250 258 2.123 29 1.160 78 1.554 239 1.181 27 0.237 756 1.233 Northern pike 1 0.010 0 0.0 0 0.0 2 0.040 0 0.0 0 0.0 3 0.005 white sucker 15 0.150 0 0.0' O 0.0 0 0.0 0 0.0 0 0.0 15 0.024 I crappie 0 0.0 2 0.016 0 0.0 0 0.0 0 0.0 6 0.053 8 0.013 Carp 8 0.080 3 0.025 5 0.200 1 0.020 26 0.129 7 0.061 50 0.082 Shorthead redhorse 5 0.050 0 0.0 0 0.0 0 0.0 1 0.005 0 0.0 6 0.010 ! Silver redhorse 0 0.0 0 0.0 0 0.0 0 0.0 1 0.005 0 0.0 1 0.002 TOTAL 158 1.580 272 2.239 34 1.360 81 1.614 271 1.340 41 0.360 857 1.39s i ~
_ _ _ - _ _ _ _ _ _ _ _ . _ . _ . . . ._. . . _ _ . -_ ~ . . . . _ . . - .. ._ ,_ -. - e ~ ~ . . .--~_n- , _- - r - - - .- .- sw . . _-w. I e 1 I I i TABIE 2.2-3 NSWBER OF FISH CAtXNT AND REAL Sr.M.k2'T CATCH DATES FOR SPECIES SOUGHT EXPRESSED AS FISH ' MAN-HOFJR Site -1 Site e2 Site e3 Site e4 Site e5 Site e6 I TOTA t. S PECI ES Caught Fi sh/Mfut Caught Fish /MHR Caught Fish /M!!R Catsqht Fish /MMR Caught Fishf>5tm Caught Fneh/PWUt Cought Fishf?*MD ! i walleye 0 0.0 2 0.500 0 0.0 0 0.0 0 0.0 0 0.0 2 0.000 Smallmouth bass 122 1.649 255 2.247 29 1.20s 62 1.357 233 1.310 19 0.704 720 1.558 Crappie 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 6 0.188 6 0.188 Carp 2 1.000 0 0.0 0 0.0 0 0.0 5 0.556 1 0.059 8 0.250 TOTAL 124 1.240 257 2.115 29 1.160 62 1.235 23R 1.176 26 0.228 736 1. 2<n 1 ' o i 1 i i I' J l TABLE 2.2-4 ESTIMATED TOTAL HARVEST OF FISMES EXPRESSED AS KILOCPAMS AND Nt,WBER OF FISR Sect 1 Sect 2 Sect 3 Sect 4 Sect 5 S*ct 6 TOTAL k
.No of No of No of No of No of No of No of i SPECIES 7ish FG Fish FG Fish FG Fish FG Fish FC Fish MG Fish PG I
walleye 68 38.400 131 73.976 0.0 0.0 52 29.365 25 14.118 276 155.859 I Smallmouth bass 646 228.306 846 ' 298.9si9 177 62.555 368 130.057 1390 491.247 321 113.444 3748 1324.601 } Northern pike 17 24.933 53 l 0.0 0.0 77.733 0.0 70 102.667 Crappie 0.0 0.0 0.0 0.0 0.0 148 29.600 148 29.600 Carp . 0.0 0.0 0.0 0.0 156 124 251.727 200.091 280 451.817 4 TOTAL 731 291.639 977 372.966 177 62.555 421 207.790 159a 772.339 618 357.254 4522 2064.543 i J i t e f
-. .- -. . . . - . . . - - - . - - . .-.___ - _ _ - _ . = _ _
1 TABLE 2.2-5 MONTICELID-SHERCO ANGLZR CATCH RATE IN FISH PER HOUR FOR 1972 THROUGH 1977 SPECIES 1972 1973 1974 1975 1976 1977 Walleye 0.005 0.031 0.083 0.010 0.010 0.029 SmalLmOuth bass 0.081 0.078 0.050 0.185 0.078 1.233 Northern pike 0.006 0.150 0.023 0.008 0.006 0.005 White sucker 0.006 0.018 0.003 0 0 0.024
. Black crappie 0.014 0.101 0.104 0.280 0.010 0.013 4
E Carp O.202 0.078 0.087 0.103 0.049 0.082 w Rock bass 0.005 0 0.003 0.003 0 0 i Black bullhead 0.062 0.053 0.200 0.026 0 0 Shorthead redhorse O O O.003 0.021 0.003 0.010 ' Silver redhorse O O O O.008 0 0.002 TOTAL O.381 0.508 0.568 0.643 0.155 1.398 i i i
4 i i e i . MONTICELLO NUCLEAR GENERATING PLANT 1 I
. ENVIRONMENTAL MONITORING PROGRAM '
i , 1977 ANNUAL REPORT !) i i 1 i E l A
SUMMARY
OF THE 197 7 MONTICELLO I 4 ET.ECTROFISHING SURVEY j- (2.3)
- i 1
i j l ! l
?
l <
- 3 i Prepared for i
Northern. States Power' Company-Minneapolis, Minnesota 4 by J. W. weinhold =
. and G. D. Heberling
- Environmental hnd~ Governmental-Activities Department Northern States Power Company-1
- [ 2.3-1
_ , , , , . , -,m- , , , . . , - - . - . - . _ . . . . , , , , . _ - _ . _..,._..,-....__a.,4, ..._ . - - , . , - - , - - . - , . . - . ,,
I ii 4 { 2.3 A
SUMMARY
OF THE 1977 MONTICELLO ELECTROFISHING ftURVEY l : 2.
3.1 INTRODUCTION
l Electrofishing studies were conducted in 1977 to assess the relative abundance and seasonal distribution of fish in response to the Monticello Nuclear Generating Plant's thermal
- j. plume. The study areas (Figure 2.3-1) were sampled eight times i
'i s between April 13 and October 27. Sector A encompasses an area l of 21.6 ha. and extends from the discharge canal outlet upstream 1.7 km to the top of Cedar Island. Sector B extends 1.5 km ) downstream from the discharge canal outlet to the bottom of Boy , Scout Rapids and includes an area of 27.1 ha. i i As in 1976, sampling and navigational problems were encountered
- due to low river levels. The 1976 drought persisted through i
the spring of 1977 and created low river discharges through August. By September drainage systems became sufficiently l recharged, and the Mississippi River returned to' normal discharge t ! levels. 2.3.2 MATERIALS AND METHODS l i 1977 sampling was conducted with pulted direct-current electro-fishing equipment (Figure 2.3-2). A 16-foot,_ flat bottom boat j was equipped with a railing, one anode, and ten cathodes. -The ( power source was a 230-volt revolving field portable _ alternator. j Current was maintained at five amperes at a rate of 60 pulses /- ~ l second-with a Smith-Root Model VI Electrofisher transforming unit.
+
l i 2.3-3 ' , - - - - - -. -._ - -.a.._ . - - - . - - . . - - - . . . . -
i Paired shocking runs were conducted along opposing shorelines as described in the 1975 report. Stunned fish were captured with one-inch mesh landing nets equipped with eight-foot handles and placed in holding basins until the completion of each
, sampling run. Elapsed shocking time was recorded for each run by a clock, which only tallied the seconds that the electrical field was energized.
i h Fish were measured to the nearest millimeter and weighed to the nearest 10 grams. Scales were collected from key scalo areas from specimens over the entire-length range for future age and rate of growth analysis. In an attempt to gain an understanding about fish movements, many specimens were marked with Floy #FD67C plastic anchor. tags that were serially numbered. .These tags were inserted into the fish at the bases of their dorsal fins. All fish, whether they were tagged or not, were allowed to recover before being released near the midpoint of each electrofishing run. I Species catch per unit effort (cpe) was computed for both sectors on each sample date. Cpe's were determined for number (fish /hr) and weight (kg/hr) by dividing the total-number and weight of fish collected per area by the elapsed ' shocking time.for that area. g Fish were grouped into twenty-millimeter intervals, and mean total lengths and weights were computed-for each group. Using i these averages, condition factors were computed for the most .' abundant species with the formula . 2.3 ._. _ _ _ _ _ _ O
1 1 K= W x 105 L3
)
where K is the condition factor, W is weight in grams, and L is total length in millimeters. I 2.3.3 RESULTS j A total of 2,282 fish were collected in the 1977 surveyr 1,148 from Sector A and 1,134 from Sector D. Most of the four-teen species that composed this catch have been common components of area electrofishing surveys since 1968 (see species list Table 2.3-1). I Percentage contribution to the total catch by number was computed for each species from 1968 through 1977 (Table 2.3-2). Monthly catch per unit effort statistics were also computed by number (fish /hr) and weight (kg/hr) for each species (Tables 2.3-3 and 2.3-4). Cor.dition factors were determined at twenty-millimeter
- intervals for the five most predominant species (Table 2.3-5).
Numbered tags were installed on 415 fish in Sector A and 355 fish in Sector B for a total of 770 (Table 2.3-6). Only four of' these tagged fish were later recovered with electrofishing l equipment. 2.3.4 DISCUSSION d As stated earlier, the 1976 drought extended into the spring of 1977, resulting in virtually no st ring run-off and low river [ levels through August. These low river levels concentrated l l l 2.3-5 l-
. .,- - . . , . - , . - _ . . . - - + - -- . - - .
j 3 i 4 the fish. This effect, plus the fact that electrofishing is L more efficient in clear, shallow water, contributed to generally - 1 i higher catch rates in 1977. Table 2.3-7 reveals substantial ; }
- increases in cpe for most species as compared with 1976 data. .
l 4 a e, Carp l 3 Carp constituted 19.6 percent of the total catch by number in Sector A and 21.2 percent in Sector B. Although these percent- ) O ages are substantially lower than those of previous years, the >
- abundance of carp, as indicated by cpe (fish /hr) in Table 4
2.3-7, remained the same as-1976. The" drop in percentage l i contribution to the total catch by carp was due to. changes in abundance of other species. i ! Catch per unit effort by number (fish /hr) for each sampling i period is illustrated in Figure 2.3-3. This figure reveals l l that carp were attracted to the warm water of Sector B in the~ I spring, whereas during summer and fall, differences in ! f abundance between the two sectors were small. l l ! Condition factors of Sectors.A and B carp were very similar. . s The mean condition factor for both sectors was 1.35. This stutistic compares well with the 1976 data, when Sector A's f mean condition factor'was 1.31 while Sector B's was 1.37. l- LThese.similar mean condition factors-in 1976 and 1977 ! indicate that carp were.in the same physical condition during i , i these two years. -
- l. -
r l ' l
~
L i 2.3-6 _ _ _ _ . _ _ _ , - . _ . . . ~ . _._ _ _ . , . _ -.. .. _ , - _ . _ ,
l S_horthead redhorse 1 ' l Shorthead redhorse composed 40.3 percent of the catch by number in sector A and 33.1 percent in Sector B. These j percentages fall within the ranges of data collected between 1968 end 1976. Figure 2,3-4 shows that the spring abundance of shorthead redhorse in Sector B was high. As in 1976, this species denonstrai:ed an attraction te wom water during the pre-spawning and spawning seaCons. During summer these fish were apparently repulsed by warm water, because the cpe in Sector B was substantially below that of Sector A. Fall abundance was very similar in both sectors. Table 2.3-7 re-veals that the 1977 annual average catch rate was significantly higher than that of 1976. Part of this increase is due to a strong 1976 year class that became recruited in 1977. Sector A, however, demonstrated a large increase in abundance of older fish also. To date, this phenomenon is unexplainable. Silver redhorse i l Silver redhorse constituted 12.7 percent of the catch by number in Sector A and 15.3 percent in Sector B. Both of these per-centages compare well with data from 1968 through 1976. As indicated by Figure 2.3-5, silver redhorse were more abundant during spring in Sector B. This abundance steadily declined
; throughout the summer, and in August the catch rate in Sector A exceeded that of Sector B. Fall catch rates were not significantly different between the two sectors.
l l 2.3-7 I l
l . Ii l The 1977 catch per unit effort was substantially greater than 1 the 1976 cpo. Most of this increased abundance was the result of a strong 1976 year class.
)
condition factors for silver redhorse from Sector A were generally larger for a given length interval than those of Sector B. The mean condition factor, however, was 1.19 for t Sector A and 1.20 for Sector B. This agreed well with the 1976 mean condition factor, which was 1.18 for both sectors. White sucker 1 i White sucker composed 3.4 percent of the total catch by number in Sector A and 2.1 percent in Sector B. Both of these fig-ures rank rather low in the data collected since 1968. As I with carp, these low statistics reflect abundance fluctua-tions of other species more so than a change in abundance of white sucker.
! Catch per unit effort for white sucker was approximately two times higher in 1977 than in 1976. This was the result of a strong 1976 year class which became recruitable. White sucker were more abundant in Sector A than in Sector B (Figure 2.3-6) .
This thermal plume avoidance tendancy has also been observed in several other years. White sucker condition factors from Sector A were larger for a given length interval than those of Sector B. Mean condition - s i factors for the two sectors were, however, very close, 1.17 for l Sector A and 1.14 for Sector B. These mean condition factors . 4 i a 2.3-8
1 l were lower than those of 1976, possibly indicating some stressful conditions. ! l Smallmouth bass Sma11meuth bass made a tremendous increase in abundance in 1977. Their percentage contribution to the total catch was 20.4 in Sector A and 22.8 in Sector B. These figures were , substantially higher than any sampling year since 1968. A very strong 1976 year class was the primary reason for this increase, and composed a majority of the smallmouth bass catch. The 1977 catch per unit effort for smallmouth bass was several times greater than 1976 for both sectors. Figure 2.3-7 demonstrates that the 1976 year class, which composed most of the catch, became more recruitable as the sampling season progressed. In spring smallmouth bass favored the warm-water areas. By midsummer they became more abundant in the ambient sector. With the return of cooler water temperatures in fall, smallmouth bass were again attracted to the warm water of Sector B. Mean condition factors for smallmouth bass collected in 1977 were 1.55 for sector A and 1.43 for Sector B. These figures were very close to those computed for 1976 fish. In general, Sector A fish had condition factors that were greater than those of Sector B fish. Walleve I - I . As in most other years, walleya composed a very small portion
~
of the 1977 electrofishing catch. Their percentage contribution was only 0.8 percent in Sector A and 1.0 percent in Sector B (by number) . 2.3-9
_ . , _ - . _ . _ _ ~ _ __ _- . _ _ l S i Catch per unit effort for walleye was virtually the same in 1976 and 1977 (Table 2.3-7) . Figure 2.3-8 shows that of - l 1 the few fish that wene collected, some attraction to warm ! I water was demonstrated in spring, whereas some avoidance . occurred in midsummer.
> Too few walleyes were collected in 1977 to warrant compu-l: tation of condition factors.
Miscellaneous fish Miscellaneous species comprised 2.8 percent of the catch in' Sector A and 4.6 percent in Sector B. Their catch rate was fairly substantial and averaged 8.9 fish /hr. in Sector A and
, 17.3 fish /hr. in Sector B.
1 The miscellaneous catch in Sector A was composed of eleven northern , pike, nine black crappie, six rock bass, one bluegill, four h northern hogsucker, and three black bullhead. In Sector B the
! catch was composed of one northern pike, ten black crappie, eleven rock bass, eight bluegill, one largemouth bass, four i northern hogsucker, eleven black bullhead, and five yellow bullhead.
Tagging study of the */70 fish that were tagged in 1977, only four were later recovered via electrofishing. These recaptures included one walleye, one northern pike, one white sucker, and one shorthead , redhorse. The walleye was tagged in Sector A on August 4 and - (
- was recaptured in Sector A on September 29. The northern pike -
1 ' ! 1 demonstrated a sedentary nature also. It was tagged on May 11 f 1 and recaptured on October 27 in the same area of Sector A. i l 2.3-10 t
White sucker and northern redhorse, however, displayed a
- transitory nature. Both fish were tagged in Sector A prior to their spawning activities. These two fish were recaptured
, later in the spring by electrofishing surveys that were being conducted at the Sherco Plant approximately three miles upstream.
It is hypothesized that fish migration and tag mortalities significantly contributed to the poor return of marked fish. A third possibility might be an experienco-avoidance reaction that fish display after once being captured by the electro-fisher. 2.3.5
SUMMARY
- 1. The 1977 electrofishing survey was conducted with a pulsed DC unit at four-week intervals from April through October.
i
- 2. Fourteen species were contained in the overall catch of 2,282 fish.
l
- 3. Both sectors had a fish community structure with the following dominance ranking: shorthead redhorse, smallmouth bass, carp, silver redhorse, white sucker, and walleye.
4 The 1977 catch per unit effort was substantially higher than 4 the 1976 cpe because of: ( l
- 1) Strong 1976 year classes of shorthead redhorse,
, silver redhorse, white sucker, and smallmouth i
.l bass that became recruitable in 1977.
t
- 2) Low river levels, present throughout most of the survey, concentrated the fish populations.
. 5. Highest annual average catch rates occurred in Sector B l for most species.
l l 3 2.3-11 l l
1 i l i
; 6. condition factors were computed for the five dominant species. These indices indicate that fish in both sectors have the same shape for a given length (plumpness). ' i 7. Seven hundred seventy fish were marked with Floy #FD 67 C f4 plastic anchor tags to study fish movements. Only four of these marked fish were recaptured, i
- I i
, s. 4 I, e l l l l r 2.3-12 i
Figure 2.3-1. 1977 Monticello electrofishing areas Legend CEDAR Sector A M ISLAND f Sector B ll,[" [!!ini).jg? i
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260-- Figure 2.3-4. 1977 Monticello Electrofishing Shorthead Redhorse Catch per Unit Effort. 240- ' 220-200-
--- - Sector A N- 4 Sector a 180- .N
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t Figure 2.3-5. 1977 Monticello Electrofishing ' Silver Redhorse Catch per Unit Effort. 160* --- - Sector A Sector B 140; 120-u 2 - 100-1 i'w d M- '! 4 m 80-s . De 60-7 N -
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N O i i e i i i i , 4/13, 5/11 6/9 7/7 8/4 9/1 9/29 10/27 l DATE i P t
_ _ _ . . . _ _ . . . _ _ ~ . _ __. , . . . Figure 2.3-6. 1977 Monticello Electrofishing White Sucker Catch per Unit Effort.
--- Sector A Sector B 80-s 60-p:
- c D m 40-M N
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Y A 20- s s v .. y~' ,s'
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i i i O i i i i 5/11 6/9 7/7 8/4 9/1 9/29 10/27 4/13 DATE , i ? I e i l 1 i 4
Figure 2.3-7. 1977 Monticello Electrofishing 220-Smallmouth Bass catch per Unit Effort. 200-
-180- - - - - Sector A Sector B
-160-140- 7
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0 # I I I I I i i 4/13 -5/11 6/9 7/7 8/4 . 9/1 9/29 10/27 DATE i i s
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i i Figure 2.3-8. 1977 Monticello Electrofishing Walleye Catch per Unit Effort. i
- - - Sector A Sector B 40- ,
30-a: - x hm 20-t H " n. w w O 8 10-s -*~ ~ p
/ ^~ y r ~ ~
5 I I 0 I. I I I I 6/9 7/7 8/4 9/1 .9/29 10/27 4/13;- 5/11 DATE i
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O a e
^ * *- _ _ _ _ _ . _ . . _
e Table 2.3-1 [ SPECIES LIST OF FISH CAPTURE , IN THE 1977 MONTICELLO ELECTROFISHING SURVEY I ! Common Name Latin Name Carp Cyprinus carpio ] Shorthead redhorse Moxostoma macrolepidotum Silver redhorse Moxostoma anisurum White sucker Catostomus commersoni Northern hogsucker - Hypentelium nigricans l Walleye . Stizostedion vitr' bum Northern pike Esox lucius
- j. Smallmouth bass Micropterus dolomieui Largemouth bass Micropterus salmoides
! Bluegill Lepomis macrochirus Black crappie: Pomoxis nigromaculatus t i , Rock bass Ambloplites rupestris Black bullhead Ictalu rus - mela s I l Yellow bullhead - Ictalurus natalis l-I l' ( l i l'
- 1 e
S 4
-2.3-21 1
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.... _ ......_._.. _.~...._._ _.... . _..._._ -. __ _..... _ ._ ._-..~ ,_____._. _
. . . - . , . . . A . . .
Table 2.3-2 i 1977 MONTICELLO ELECTROFISHING Percent of Total Catch by Number
.i Shorthead Silver White Smallmouth Carp redhorse redhorse sucker bass Walleye Misc . SECTOR'A 50.7 34.5 4.4 2.7 1.5 '4.8 'O.8 -;
1968 i 29.4 48.6 7.4 4.5 1.8 2.0 1.0 1969 1971 25.3 36.9 9.1 13.1 7.6 7.1 1.0 45.11 26.1 9.1 4.1' 7.0 1.1 2.6 1972 '
'1973' :39.9 34.8- 13.0 4.9 2.0 0.7 -2.2 1974 44.3- 20.3 16.7 9.2 1.5 0.1 1.5.
M .1975 '53.5 27.0 ~9.3 3.7 0.9 0.5 2.8 w 1976- 41.0 36.4 12.3 3.5 3.4 1.4 2.0 I ' 12 ; 7 .. 3.4. 20.4 0.8 2.8 w '1977 -19.6 40.3 w , SECTOR B" 34.3 58.9 2.9 3.0 0.4 0.3 0.3
- 1968 '
17.3 65.1 9.6 4.8- 2.0 1.2 0.4 1969 27.2 35.9 7.8 6.3 12.6 6.8 ~ 2.0 1971 5.9 2.0 2.5 i
'1972 38.4 33.4 8.2 3.3-1973- 31.2 41.3 11.5 4.0 2.9 1.2 1.8 i 1974 47.9 22.6- 15.2 6.4 0.9 0.6 2.6' 1975 40.8 37.6, 10.8 1.9 3.8 1.3 0.6 .
I 1976 32.4' '40.1 12.6 1.6 9.3 ' 1. 5 2.5 . i 1977 ~21.2 33.1 15.3 2.1 22.8 1.0 4.6 1 1
- y. , , , y ,
Table 2.3-3
- 1977 MONTICELLO ELECTROFISHING Catch Per Unit Effort by Number (Fish /hr)
Shorthead Silver White Smallmouth Carp redhorse redhorse sucker bass Walleve Misc Total SECTOR A '!
- 4/13 30.0 187.3 28.3 21.2 - -
10.6 277.4 . 5/11 126.7 168.2 50.7 6.9 32.2 2.3 18.4 405.4 6/9 106.9 101.8 56.0 12.7 45.8 5.1 2.5 330.8-i -7/7 26.6 129.8 29.9 6.7 93.2 - 10.0 296.2 8/4 61.0 186.9 44.7 4.1 48.8 8.1 6.0 359.6 9/1
.23.9 97.7 54.3 -
60.8 - 8.8 245.5 9/29 38.2 95.6 44.0 11.5 88.0 3.8 7.6 288.7 l Y 10/27 77.1 41.4 9.4 20.7 141.0 - 7.6 297.2 u j Annual ! Average '61.3 126.1 39.7 10.5 63.7 2.4 8.9 312.6 i I SECTOR B l 4/13 175.5 250.7 103.1 11.1 13.9 16.7 2.8 573.8 5/11 -159.5 258.6 _ 129.3 4.3 73.3 4.3 64.7 694.0 l 6/9- 79.7 48.3 72.5 7.2 38.6 4.8 4.8 255.9 { 7/7 33.4 88.3 43.0 2.4 52.5 - 4.8 224.4
- 8/4 83.2 97.9 17.1 -
39.5 - 10.0- 247.7 l 9/1 24.0. 107.9 55.2 4.8- 103.1 2.4- 4.8 302.2 9/29 25.4 116.7 35.5 12.7 200.4 2.5 17.7 410.9 10/27 53.9 22.2. 1.6 19.0 160.1 - 28.6 285.4 [ ' Annual-
. Average 79.3 123.8 57.2 7.8 85.2 3.8 17.3 374.4 i
l. i
. -..._m._ . ..._ _ . _ . . . _ . _ ... _ _ _ _ _. . ...... _ . .__ _ _ ... _ . _ _ _. . ....... _ ___... _ . _ .. _ _ _ _ . - _ . . _ .
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f I Table 2.3-4 ' l i 1977 MONTICELLO ELECTROFISHING
. Catch Per Unit Effort by Weight (Kg/hr)
Shorthead Silver White- Smallmouth redhorse Sucker bass Walleve Misc Total Carp redhorse SECTOR A l 52.4 13.7 - - 3.9 348.9' 4/13 52.7 226.2 i 85.6 3.0 8.6 0.5 8.9 492.0 5/11 214.5 170.9 94.4 76.8 9.1 13.4 3.0 0.1 364.6- > 6/9 167.8 6.1 21.6 - 5.6 206.3 7/7 35.4^ 99.9. 37.7 44.8 3.6 7.1 2.6 0.9 260.7 , ! 8/4 94.6' 107.1 10.6 - 4.2 168.1 9/1 42.5 6 2. 4.. '48.4 - i 86.4 51.1 4.8 19.1 2.4 10.3 246.7 9/29 72.6 5.4 24.0 - 3.1 207.6
- u 10/27 138.4 27.6 9.1 to i Annual 30'.8 5.7'
+ 64.4 13.0- 1.1 4.6 1
- ".p. Average 103.6 109.4 i
i. l SECTOR B
.238.2 171.6 '63.7 7.6 7.7 .0.3 694.7 .
! 4/13 205.6 211.4' 138.5 2.8 11.4- 2.1 8.0 569.5 l 5/11- 195.3 i 3 0. 2 -- 75.6 5.7 10.4 4.5- 0.6 216.0 [ 6/9 89.0 0.2- 8.7 - 0.9 91.3 25;3 22.7-
- l. 7/7 33.5 6.8 3.7 192.21 37.6 8.3 -
8/4 4 135.8 31.9 '32.0 3.3 20.0 'O.3 -1.1 117.2 9/1 28.6 9.7 35.6 2.3 2.6 222.1 39.8 88.7 -43.4 ,
- j. 9/29 7.9 24.7 -- 2.6 130.4 22.0 '3.3 j
o 10/27 -69.9 1 Annual 2.5 279.2 61~. 9 11.7 15.6 2.1 I Average .99.7 85.7 i I I'.. . .
= . . , ,
m - 9
. _ , . _, - -2 _
i-i t' i l Table 2.3-5 1977 MONTICELLO FISH CORDITION FACTORS FOR SECTORS A AND B j
- Total Shorthead Silver White Smallmouth l
length Carp redhorse redhorse Sucker Bass , A B A B A B A B A B 100 120 1 140 1.40 1.47 I 160 1.0 1.17 1.50 1.57 1.45 1.19 1.62- 1.29 i 180 1.17 1.22 1.20. 1.31 1.32 1.14 1.56- 1.36 } 200 1.33 1.23 1.10~ 1.19 1.14 l'.55 1.38 ! 220 1.17 1.17 1.23 1.10 0.94 1.47 1.87 240 .l.13 1.22 1.07 1.32 1.11 1.23 1.41- 1.37 1.09 I 260 1.25 1.50 1.07 1.17 0.90 l.16- 1.40 1.40 4 280 1.32 1.02 1.10 1.15 1.43 1.32-i 300 1.34 1.44 1.19 1.37 1.15 1.12 1.57 1.41. ! I 320 1.44 1,55 1.14 1.05 1.05- 1.43- 1.16 ! ' 340 1.36 1.36 1.15 1.20 1.91- 1.20 ! 360 1.19 1.47 1.18 1.21 1.18 1.01- 1.91 1.53 l 380 1.15 1.12 1.09 1.26 1.19 0.87 1.54 1.59 ! 400 1.67 1.30 1.25 1.12 1.14 1.11 1.23 1.14 '1.54 1.59 . 420 1.50 1.31 1.14 1.10 1.12 1.11 1.12 1.11 1.71 I 440 1.42 1.34 1.10 1.12 1.27 1.22 1.24 0.97 1.46 I 460 1.40 1.34 1.08 1.12 1.19 -1.07 1.10 1.03 1.59 i 480 1.39 1.43 1.09 1.09 1.24 -1.18 1.05 1.63 500 1.35 1.35- 1.12 1.07 1.18 1.17. l 520 1.36- 1.39 1.11 1.08 1.19 1.19 8 540 1.49 1.35 0.99 1.17 1.20- 1. 21--- 560 1.37 1.40 1.19- 1.17 580 1.37 1.30 1.20 1.15 l 600 1.28 1.30- 1.06-620' 1.39 1.05 1.32 640 , 660 '1.15 3 680- 0.97 700- 1.36 j- , Mean 1.35- 1.35 1.14 1.15 1.19 1.20 1.17 1.14- 1.55- 1. <4 3
]-
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C . W G . U White , sucker o l n w ! e M 4 j P- J , W H w u Smallmouth m 7 7 w m 5 l bass
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* * " Walleye $ @$ .
C P-8*9 ! n M h Northern- 7 d " ! M i + co r .a N O
- Pike w e F
r
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a m . P- H i e Black n m
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e 4 4 crappie > s !
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A i y w i Yellow , bullhead
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. _ - _ _ _ _ _ _ _ - , , _ . _ ~ . .. _ _._ . . _ _ . . . . . ~ . .
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P I Table 2.3-7 .i - i MONTICELLO ELECTROFISHING
'1976 and 1977 Catch Per Unit Effort by Number (Fish /hr)
Shorthead Silver White Smallmouth I Carp redhorse redhorse Sucker bass 'Walleve Misc Total-4 SECTOR'A ^ 1976 67.4 59.9 20.3 5.8- 5.7- 2.3 3.2 164.6 1977 61.3 126.1 .39.7 10.5 63.7 2.4 8.9- 312.6 . i l b i
.ta j h- SECTOR B
- w 1976- 77.0' 95.2 29.9 3.8 22.2 3.5 6.0 231.6 f 1977 79.3 123.8 57.2~ 7.8 85.2 3.8 17.3- 374.4 i
4 4 i 1 4 t 1 s
i i f i MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL MONITORING PROGRAM' 1977 ANIUAL REPORT l l 4 I i SEINING STUDY . (2.4)- t I i e i l l-i i Prepared for . ' Northern States Power Company Minneapolis, Minnesota-l ,
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l i J. W. Weinhold Environmental and Governmental 3 Activities Department ! . Northern States Power Company i-
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2.4 MONTICEILO SEINING STUDY - 1977 2.
4.1 INTRODUCTION
Seining studies were conducted once every two weeks on the Mississippi River near the Monticello Nuclear Generating plant between June 8, 1977 and September 28, 1977. The study objectives were to determine species composition and relative abundance of small fish within the plant site area. The study area included 1.6 km of river extending 0.8 km upstream and 0.8 km downstream from the plant 's discharge canal. Shoreline and bottom structure dictated selection of sampling locations. Two sites upstream and two sites downstream from the discharge canal outlet were selected (Figure 2,4-1) . Station M-1 was located in a channel between Beaver and Cedar Islands 0.6 km upstream from the discharge canal. This riffle area was approximately 0.7 m. deep and had a i rubble-gravel bottom with no aquatic vegetation present. Station M-2 was located 0.8 km upstream from the discharge on the north side of a small island on the depositional side of a bend, near a fast-flowing trench that was 2 m. deep.
! M-2 had moderate current velocity and an average depth of
! 0.8 m. The substrate consisted primarily of gravel with no
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aquatic vegetation. M-3 was located 0.5 km downstream from the discharge canal i' within the plant 's thermal plume. This site was i I l 2.4-3 I
k 4 l characterized by a gravel-sand bottom, slow current, no aquatic vegetation, and an approximate depth of 0.6 m. M-4 was located 0.8 km downstream from the discharge canal i and was also within the plant 's t'.termal plume. This site has an average depth of one meter. It had a gravel substrate 1 and slow current velocity. Small patches of aquatic vegetation (Potomageton nodosus) were also present. 2.4.2 METHODS AND MATERIALS A 15-foot seine with 1/8-inch mesh netting and a 20-foot seine
; with 1/4-inch mesh netting were used for sampling. Hauls were directed downstream with the current. The distance of each 4
seining haul was determined and recorded. Captured fish were immediately placed in a water-filled basin. Specimens were identified, tabulated, and released. Voucher specimens were preserved in a 10 percent formalin solution. Computation of the area sampled was accomplished by multi-plying the length of the haul by the width of the seine. Species abundance indices were computed by expanding the-number of captured fish to the number of fish that would have been collected in a hectare (cpe). Species percentage composition to the total catch figures were calculated using these abundance indices. j 2.4.3 RESULTS [ A total of 23 species were collected in the 1977 study (Table 2.4-1). Twenty species were captured in upstream t 2.4-4
.. - - - . . .. ..- -.. .. . _ . . .. . . - , . ~ - -. .
i i 4 I i areas and 18 species in downstream locations. i 2 Abundance indices (Tables 2,4-2 and. -3) showed that the major l upstream species were bigmouth shiner, spotfin shiner, ' and bluntnose minnow. Major downstream species, in decreasing j abundance, were bluntnose minnow, spotfin shiner, and , bigmouth shiner. i ! Community structure, expressed as ranked dominance (Table ! 2.4-4), indicated a similarity between upstream and downstream - s l areas, with deviations arising from the presence or absence l of relatively uncommon species. Variation in community i
- structure between stations was associated with habitat differences at these stations.
i j 2.4.4 DISCUSSION l In 1977 the Mississippi River had extremely low discharge l- levels, consequently, some of the sseining station locations-l that were used in 1970, 1973, 1974, and 1976 did not' exist in 1977. Comparative sampling,._therefore, was impossible. i A total of 23 species in 16 genera and.6 frmilies were l I e collected in 1977. Upstream species-composition islsimilar i , to that of the downstream section,.with the exception of 4 creek chub, carp, longnose dace,-blacknose dace,-and trout. ?
! }' perch. These species 1were all found at Station M-1 in the i !
j . upstream area. I f' I Rockbass, bluegill, and' brook silverside were found primarily-4 at M-4. These species prefer deeper water, slow current, and i - 4 2.4-5 4 .., -, ,. ,.- _ . . , , . . . , . . _ . - . _ . . , _ , . . _ _ _ . . _ _ _ . . ~ . . _ . _ _ ..._.. _ . _ _. _ _ . .. . __ _ ,
I I I aquatic vegetation, which are characteristics of only site - M-4. , Major small fish populations, in this and previous studies,. were the spotfin shiner, bluntnose minnow, bigmouth shinor, and sand-shiner. Bigmouth shiner was the dominant species in riffle areas, and the bluntnose minnow the dominant species in slower mc,ving water. .Spotfin shiner and sand g shiner were most abundant in moderately flowing water with a gravel substrate. It is hypothesized that- lower water levels in 1977 and the presence of aquatic vegetation may = have contributed to slight shifts in community structure as compared with other years , (Tables 2.4-1 and 2.4-4) . Table-2.4-5 presents the 1973, 1974, and 1977 data-on the - number of fish collected per hectare for smallmouth bass, white sucker, and redhorse species. The reduced cpe-suggests - that 1977 was a year of poor _ reproductive success for these species. Abnormal spring conditions,'which included rapidly falling river-levels-and tremendously-accelerating temperatures.during spawning and incubation periods, are believed _to be responsible for poor first-year _ survival of these species. 2.4.5
SUMMARY
I
- 1) A total of 5,812 fish from 2.? species were captured in' .
the seining study- (3,568 fish were collected in upstream 2.4-6 j
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i 4 k 4 areas and 2,244 in downstream areas). l: l 2) Dominant species in the upstream section were bigmouth a i shiner, spotfin shiner, bluntnose minnow, white suckar, and johnny darter. The downstream community had the j following order of dominance: bluntnose minnow, spotfin l shiner, bigmouth shiner, sand shiner, logperch, and i johnny darter. t l 3) Variation in dominance for major species between stations I was due to microhabitat differences. Bigmouth shiner l was found primarily in~ fast ' moving water and bluntnose j minnow was found mainly in slow current areas. Spotfin shiner and sand shiner preferred. shallow, moderately-flowing water with a gravel substrate. Dace and chub ! species were found exclusively in riffles, in contrast to the silverside and sunfish species, which were j collected in only vegetated locations. i ! 4) Cpe data for 1973, 1974, and 1976 indicated poor repro-i ductive success in 1977 for smallmouth bass,. white sucker, '
.and r'edhorse species, i
- ; See Table 2.4-6 for species list of fish ~ discussed in this text.
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d i M-2
! CEDAR ISLAND l
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w l BETNIR M1 - r ISLA99 j g k PLANT SITE- ._ d COOLING S;#ERS i I DISCHARG CANAL 'i l l ' M-3 fg 0 0.5 \ f l OXBOtt I 1 j i j ISIAND Scale-Kilometers sD l
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l MT j LANDING l STORAGE / l BUILDING j
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l / THERMAL i / l / PLUME MONTISIPPI PARK i . s',f l f Figure 2.4-1. Monticello Seining Areas i I ! 2.4-9 ,
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Table 2.4-1 1977 Monticello Seining Study Species Lists for 1970, 1973, 1976,and 1977. _1970 1973 1976 1977 Hornyhead chub X X X X Creek chub X X X ' Fathead minnow X X X Bluntnose minnow X X X X. 1 Brassy minnow X Spotfin shiner X X X X Bigmouth shiner X X X X Sand shiner X X X- X River shiner X Spottail shiner X X X Connon shiner -X X X X Golden shiner X Mimic shiner X Carp X X Longnose dace X X X X Blacknose dace X 'X X X Northern redbelly dace X Silver redhorse X X X X Shorthead redhorse X X X X White sucker X X X X Black bullhead X Trout perch X X Brook silverside X Smallmouth bass X -X X X Largemouth. bass X Black crappie X Rockbass X X Bluegill X X i Logperch X X X j . Johnny darter X X X X ? -i { X --Denotes presence e 1 2.4-11
e Tabel 2.4-2 1977 Monticello Seining Study Average number of fish collected per hectare and percentage composition of the total catch for each species in upstream and downstream areas. Station M-2 Station M-3 Station M-4 Station M-1 Fish /ha % Fish /ha % Fish /ha % Fish /ha % 99 0.7 215 2.2 1617 5.2 52 0.4 Hornyhead chub 13 < 0.1 Creek chub 80 0.6 13 0.1 44 0.1 2561 25.8 Fathead minnow 2753 21.0 3509 24.7 Bluntnose minnow 4092 13.2 2092 21.1 1954 14.9 2964 20.1 Spotfin shiner 5551 17.9 2497 17.6 1599 16.1 9572 30.9 3105 23.7 Bigmouth shiner 1286 9.8 934 6.6 7 0.1 1254 4.1 Sand shiner 106 0.8 2180 15.3 926 9.3 River shiner 587 1.9 11 0.1 693 5.3 11 < 0.1 Spottail shiner 0.4 195 1.4 319 3.2 g 144 0.5 54
- Common shiner 21 0.2 Carp 27 0.1 i
279 0.9 50 0.4 U Longnose dace 21 0.1 Blacknose dace 1.4 30 0.2 169 1.2 219 2.2 Silver redhorse 443 0.2 100 1.0 322 2.5 29 37 0.1 Shorthead redhorse 12.1 557 4.3 209 1.5 74 0.7 White sucker 3754 Trout perch 32 0.1 11 0.1 Brook silverside 50 0.4 Smallmouth bass 131 0.4 133 1.3 16 0.1 Rockbass 22 0.2 Bluegill 425 3.3 440 3.1 1303 13.1 Logperch 331 1.1 321 3.2 1624 12.4 403 2.8 Johnny darter 2142 6.9 89 0.6 Shiner species 898 2.9 383 2.7 Redhorse species l w_ ____
Table 2.4-3 1977 Monticello Seining Study , Average number or fish collected per hectare and percentage composition of the total catch for each species in upstream and downstream areas. i - Upstream Downstream Fish /ha % Fish /ha % Horneyhead chub 862 3.9 175 1.4 Creek chub 8 < 0.1 i Fathead minnow 24 0.1 35 0.3 Bluntnose minnow 2946 13.4 3023 24.6 Spotfin shiner 3301 15.0 2518 20.5 Bigmouth shiner 6724 30.5 1980 16.1 Sand shiner 1414 6.4 529 4.3 River shiner 390 1.8 1747 14.2 Spottail shiner 390 1.8 11 < 0.1 Common shiner 107 0.5 287 2.3 Carp 27 0.1 Longnose dace 370 0.8 Blacknose dace 12 < 0.1 Silver redhorse 203 0.9 208 1.7 Shorthead redhorse 202 0.9 71 0.6 i White sucker 2401 10.9 157 1.3 Trout perch 18 < 0.1 Brook silverside 6 < 0.1 Smallmouth bass 101 0.5 12 < 0.1 Rockbass 72 0.6
- Bluegill 13 < 0.1 i
Logperch 449 2.0 845 6.9 i Johnny darter 1954 8.9 381 3.1 Shiner species 337 1.5 22 0.2 Redhorse species 215 1.8 (undetermined) l l l { 2.4-13 I
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+whe-Table 2.4-4 1977 Monticello Seining Study in 1970, 1973, 1976,and 1977 Dominance rankings for upstream and downstream areas 1973 1976 1977 1970 Up Down Up Down Up Down Up Down stream stream stream stream j stream stream stream stream 10 j 8 14.5 7 9 5 7 IIornyhead chub 19 20 12.5 11 16.5 13 I
Creek chub' 9 12.5- 8 17 16.5 1 Fathead minnow 2 3 4 3 4 8 4 Bluntnose minnow 15 13 Brassy minnow ~ 2 1 2 2 3 3 1 3 1 3 Spotfin shiner 2 3 4 6 1 1 6 Bigmouth shiner 2 2 1 4 5 3 6 Sand shiner 11 4 River shiner 11 17 10 14 12 10 Spottail shiner 6 17 14 9 8 6 5 Common shiner 17.5 t u Golden shiner 14.5 14 Mimic shiner 12.5 12 15 Carp 8 10.5 13 h 7 7 8.5 15
- Longnose dace 12 13 18 10.5 19 11 Blacknose dace 20 Northern redbelly dace 10 5 7 5 4 11 8 10 White sucker 15.5 Black bullhead 14 14 18 Trout perch 18 i Brook silverside 6 9 8.5 11 10.5 10.5 16 16 Smallmouth bass 17 Largemouth bass Black crappie 15.5 12 17.5-Rockbass 14 15 Bluegill '16 9 9 8 5 18 Logperch 4 6 7 6 7 5 8 5
Johnny darter 11 19 Shiner species 12 1. 2 9 7
' 12.5 13 11 Redhorse species 8 . g
H Table 2.4-5 1977 Monticello Seining Study Average number of smallmouth bass, white sucker and Redhorse species collected per hectare in upstream and downstream areas
. in 1973, 1974 and 1977 Smallmouth bass Upstream Downstream Fish /ha Fish /ha
, 1973 256 92 1974 380 152 1977 101 12 4 White sucker Upstream Downstream i Fish /ha Fish /ha 1973 1881 1416 1974 250 78 1977 2401 157 Redhorse species Upstream Downstream Fish /ha Fish /ha 1973 989 1140 1974 841 797 1977 405 494 8 2.4-15
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> Table 2.4-6 1977 Monticello Seining Study species list of fish discussed in this text
, Common Name Latin Name Hornyhead chub Nocomis_biguttatus Creek chub Semotilus atromaculatus Fathead minnow Pimephales promelas Bluntnose minnow Pimephales notatus Brassy minnow . Hybognathus-hankinsoni Spotfin' shiner Notropis spilopterus Bigmouth shiner Notropis. dorsalis i Sand shiner. Notropis stramineus j River shiner Notropis blennius Spottail-shiner Notropis hudsonius Common shiner Notropis cornutus . Golden shiner .Notemigonus crysoleucas Mimic shiner Notropis volucellus Carp Cyprinus carpio Longnose dace Rhinichthys cataractae Blacknose dace Rhirichthys ,atratulus l , Northern redbelly dace Chrosomus eos j j Silver redhorse Moxostoma anisurum e Shorthead redhorse Moxostoma macrolepidotum
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. White sucker. Catostomus commersoni Black bullhead Ictalurus melas f Trout perch Percopis omiscomaycus f l Brook silverside Labidesthes sicculus i Smallmouth bass Micropterus dolomieui l Largemouth bass .Micropterus salmoides i Black crappie Pomoxis nigromaculatus Rockbass Ambloplites rupestris ' Bluegill. Lepomis macrochirus . Logperch Percina caprodes-Johnny-darter- Etheostoma nigrum-L- 4 t 4 9 2.4-16 1
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