ML18038A595
| ML18038A595 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 08/25/1983 |
| From: | Federal Emergency Management Agency |
| To: | |
| Shared Package | |
| ML17054A040 | List: |
| References | |
| NUDOCS 8308300695 | |
| Download: ML18038A595 (95) | |
Text
'c TOWN OF
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.SCRIBA, NEW YORK OSWEGO COUNTY.
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F PDR Rr GULATORY DOCKET FlLE federal emergency management agency COMMUNITYNUMBER - 360663
0 TABLE OF CONTENTS Pacae 1o0 INTRODUCTION 1.1 Purpose of Study 1.2 Authority and Acknowledgements
- 1. 3 Coordination 2 ~0 AREA STUDIED 2 ~ 1 Scope of Study
- 2. 2 Community Description 2.3 Principal Flood Problems 2.4 Flood Protection Measures
~ 0 ENGINEERING METHODS
- 3. 1 Hydrologic Analyses 3.2 Hydraulic Analyses 4~0 FLOOD PLAIN MANAGEMENT APPLICATIONS 12
- 4. 1 Flood Boundaries 13 4.2 Floodways 13 5 ' INSURANCE APPLICATION
- 5. 1 Reach Determinations 5.2 Flood Hazard Factors 24 5.3 Flood Insurance Zones 24 5.4 Flood Znsurance Rate Map Description 25
TABLE OF CONTENTS - continued Pacae 6~0 OTHER STUDIES 25 7~0 LOCATION OF DATA 25 8~0 BIBLIOGRAPHY AND REFERENCES 25 FIGVBES Figure 1>> Vicinity Map Figure 2 - Potential 100-year flood level for Walker Creek at the Creamery Road bridge Figure 3 - Floodway Schematic 21 1lQKES Table 1 - Summary of Discharges 9-10 Table 2 Floodway Data 15 -20 Table 3 - Flood Insurance Zone Data 22-24 EXHIBITS Exhibit 1 - Flood Profiles Oswego River Panels 01P - 02P Wine Creek Panel 03P Walker Creek Panels 04P - 05P Lycoming Creek Panels 06P - 08P Cliff Road Creek Panels 09P - 12P Lakeview Creek Panels 13P - 14P Harbor Brook Panel 15P Exhibit 2 - Flood Boundary and Floodway Map Index Exhibit 3 - Flood Boundary and Floodway Map
TABLE OF CONTENTS continued I
(
PUBLISHED SEPARATELY:
Flood Insurance Rate Map Index Flood Insurance Rate Map
0 0
FLOOD INSURANCE STUDY TOWN OF SCRIBA~ NEW YORK 1 ~ 0 INTRODUCTION 1.1 Purpose of Study This Flood Insurance Study investigates the existence and severity of flood hazards in the Town of Scriba, Oswego County, New York, and aids in the administration of the National Plood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This study will be used to convert Scriba to the regular program of flood insurance by the Federal Emergency Management Agency (PEMA). Local and regional planners will use this study in their efforts to promote sound flood plain management.
In some states or communities, flood plain management criteria or regulations may exist that are more restrictive or comprehensive than those on which these federally-supported studies are based. These criteria take precedence over the minimum federal criteria for purposes of regulating development in the flood plain, as set forth in the Code of Federal Regulations at 44 CFR, 60. 3. Zn such cases, however, it shall be understood that the state (or other jurisdictional agency) shall be able to explain these requirements and criteria.
1.2 Authority and Acknowledgements The source of authority for this Flood Insurance Study is the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973
'he hydrologic and hydraulic analyses for this study were prepared by Lockwood, Kessler and Bartlett, Inc. for the Pederal Emergency Management Agency, under Contract No. H-4741. This work was completed in June 1980.
- 1. 3 Coordination An initial Consultation and Coordination Officer's (CCO) meeting was held on April 14, 1978 to identify streams requiring detailed study. This meeting was attended by representatives of Lockwood, Kessler and Bartlett, Inc. (the study contractor), the FEMA, and the Town of Scriba.
A legal notice announcing the intent to perform the study and stating its objectives was placed in the local newspaper.
During the course of this study several federal, state and miscellaneous agencies were contacted for information. Federal agencies contacted
0 included the Buffalo District of the U. S. Army Corps of Engineers (COE),
the Soil Conservation Service (SCS), the U. S. Geological Survey (USGS),
the National Oceanic and Atmospheric Administration (NOAA), the U. S.
Department of Civil Defense and the Federal Disaster Assistance Administration.
Agencies contacted from the State of New York included the New York State Department of Commerce, the Department of State, the Department of State Community Affairs Library, the Department of Environmental Conservation (Flood Control Section), the State Library, the Department of Transpor-tation and the Office of Disaster Prepardness The Oswego County Planning Board, the New York Public Library and representatives of the Town of Scriba were also contacted for related information.
The results of the hydrologic analyses were coordinated with the COE, the USGS, the SCS and the New York State Department of Environmental Conservation (NYSDEC).
On September 16, 1981, the results of the study were reviewed at the final CCO meeting attended by representatives of the study contractor, the FEMA, community officials and interested citizens.
2~0 AREA STUDIED 2o 1 Scope of Study This Flood Insurance Study covers the incorporated area of the Town of Scriba, Oswego County, New York. The area of study is shown on the Vicinity Map (Figure 1) ~
The Lake Ontario and Oswego River shorelines within the Town of Scriba, Wine Creek, fzom Town Line Road to Churchill Road, the segment of Walker Creek between State Route 104 and Middle Road, Lycoming Creek, fzom the Hamlet of Lycoming to its mouth at Lake Ontario, Cliff Road Creek, from the vicinity of Conrail to its mouth at Lake Ontario, Lakeview Czeek, from Lakeview Road to its mouth at Lake Ontario, and 300 feet of flooding affecting Scriba from Harbor Brook in the City of Oswego along the west corporate boundary were studied by detailed methods. The areas studied by detailed methods were selected with priority given to all known flood hazard areas and areas of projected development and proposed construction for the next five years, through June 1985.
A portion of Walker Creek Tributary from its confluence with Walker Creek to the Conrail crossing, a 1,000 foot segment of Lake Creek beginning at the western boundary of the Town of Scriba, the remainder of Wine Creek from the Churchill Road - Hall Road intersection to Deer Ridge Road, Deer
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Ridge Creek and Deer Ridge Creek Tributary, Black Creek and Black Creek Tributaries 7 through 9, Paddy Creek, Paddy Pond Tributaxy, Crooks Pond Tributary, Black Creek, Crooks Creek, Crooks Pond, Paddy Pond and portions of Mud Pond Creek located within Scriba were studied by approximate methods. Approximate methods of analysis were used to study those areas having low development potential and minimal flood hazards as identified at the initiation of the study. The scope and methods of study were proposed to and agreed upon by the FEMA.
20 2 Community Description The Town of Scriba, encompassing a land area of 41 ' square miles, is located in the northwestern section of Oswego County, New York, along the southern shoreline of Lake Ontario. Scriba is approximately 28 miles north of the City of Syracuse, New York. Xt is bordered by the Town of New Haven on the east, the Town of Volney on the south and the Town of Minetto and the City of Oswego on the west.
Zn 1970, the population of Scriba was 3,619, approximately 45 percent greater than its 1960 population of 2,489 (Reference 1). This gave the town a 1970 population density of approximately 88 persons per square mile (Reference 2). The Town of Scriba was incorporated on April 5, 1811, and was once a prosperous dairying area, although it is now known for its extensive vegetable and fruit production. While many of Scriba's 0 residents work in the surrounding region, several major industries provide employment within the town. These industries include an Alcan Aluminum Plant, the J. A. Fitzpatrick Nuclear Power Plant and the Nine~lile Point Nuclear Power Station.
The Town of Scriba lies within the geographical area known as the Lake Ontario Plains, which are located within the greater geographical- area called the Great Lakes Plain. The Great Lakes Plain extends along the full length of the northern and western borders of New York State, connecting Lake Erie, Lake Ontario and the St. Lawrence River (Reference 2). Zn the east-central portion of the town, the terrain is relatively level. Zn the remainder of the town the terrain consists primarily of rolling hills and drumlin formations. Elevations within Scriba range from a low of 246 feet at the Lake Ontario shoreline to a high of 515 feet just south of the State Route 104 - Delancy Airport. Road inter-section The land use in Scriba is predominantly undeveloped, agricultural, or comprised of forest. Small orchards are also located intermittantly through the town. Wetlands are plentiful, with Teal Harsh and the wetlands surrounding Black Creek the most significant (Reference 3).
Residential and commercial development tends to follow the main traffic corridors- Small concentrations of residential development are found in
the Hamlets of Lycoming, Scriba, Lakeview, Jones Corner, and in the area northeast of the Mall Road - Town Line Road intersection in eastern Scriba.
Approximately 7.4 miles of the Lake Ontario coastline forms the northern border of the Town of Scriba. A portion of Scriba's western border is formed by the Oswego River. At the town's corporate limits, the Oswego River drains an area of 5,096 square miles. Wine Creek originates in the southwestern section of Scriba and flows north through the City of Oswego before emptying into Lake Ontario. It has a drainage area of 1-8 square miles. Walker Creek originates to the northeast of the Hall Road-Johnson Road intersection and flows northwest through the town before emptying into Lake Ontario. Walker Creek has a drainage area of 3.9 square miles Lycoming Creek is a major drainage source, and drains an area of 6.8 square miles in northeast Scriba. It flows generally north from the Hamlet of Lycoming to its mouth at Lake Ontario in Sunset Bay.
Cliff Road Creek, which originates southeast of the North Road - Creamery Road intersection in north-central Scriba, has a drainage area of 1.9 square miles at its mouth at Lake Ontario. Lakeview Creek flows north to empty into Lake Ontario at the Hamlet of Lakeview. It has a drainage area of 4.0 square miles.
Walker Creek Tributary originates in central Scriba and flows northwest to its confluence with Walker Creek. A short segment of Lake Creek flows through Scriba before entering the City of Oswego, where it empties into Lake Ontario. Deer Ridge Creek Tributary flows northwest through south-west Scriba before joining Deer Ridge Creek, which also flows northwest through the town to reach its confluence with the Oswego River. Black Creek Tributaries 7, 8 and 9 flow south to their respective confluences with Black Creek in south central Scriba. Paddy Creek, Paddy Pond Tributary, Crooks Creek, Crooks Pond Tributary, Mud Pond Creek, Crooks Pond and Paddy Pond are all located in the southeast corner of the town-I, The region's climate is classified as humid continentals Prevailing westerly winds that blow across the full length of Lake Ontario affect the temperature in both summer and winter, with the exclusion of periods when the lake's surface is frozen. The ice causes the delay of warm weather in the spring. Autumn is a relatively warm season; however, winters are severe due to a large frequency of storms and cold waves (Reference 4) ~ Scriba is subject to what is known as the "lake effect",
due to its close proximity to Lake Ontario. Because the lake is a large body of water, it responds slowly to changes in temperature. When cold air arrives in the winter, the lake waters are still relatively warm, while in the early summer, the lake remains quite cool. Each winter the lake effect is the cause of many heavy snow squalls. These squalls continue well into February, since much of the lake surface does not freeze throughout the early winter months. The mean monthly temperature
for Scriba is approximately 24.5 degrees Fahrenheit (4F) in January and approximately 69.5 F in July. The mean annual rainfall is approximately 34.5 inches, and the mean annual snowfall is approximately 85 inches (Reference 4).
2.3 Principal Flood Problems There are several areas subject to flooding within the Town of Scriba.
Along Wine Creek, flooding has occurred at Town Line Road and along the muck farms bordering the creek. Zn the past, Walker Creek has overtopped Creamery Road and Lycoming Creek has overtopped Lycoming Road. Many of the cottages bordering Lake Ontario have also been inundated. The 100-year flood level of Walker Creek at the upstream face of
'otential the Creamery Road Bridge is shown in Figure 2.
~6 ~ g l00 YEAR FLOOD
~ A Figure 2 - The potential 100-year flood level for Walker Creek at the upstream face of the Creamery Road Bridge, facing west.
An historical storm occurred in June 1972, as Tropical Storm Agnes passed through the Oswego River basin. Although many communities within the area received record amounts of rainfall, flooding and its resultant damages were minimal in Scriba (Reference 5). Zn March 1973, however, serious flooding and accompanying soil erosion occurred along Lake Ontario, damaging nearly $ 2.2 million worth of property along its shore-line in Oswego County (Reference 6) Additional flooding occurred in
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January 1978, when an ice jam on the Oswego River in the Town of Volney flooded homes in nearby Scriba.
Flooding along Lake Ontario is affected by three categories of lake level fluctuations: long-term, seasonal and short-period. Long term fluctu-ations are caused primarily by an increase or decrease of precipitation over the lake. Shoreline flooding also occurs when consecutive annual rainfalls are higher than the mean annual precipitation. The time inter-vals between successive high-water periods are of irregular length and can sometimes cause abrupt increases in the lake level. This study is primarily concerned with long-term fluctuations in combination with seasonal and short-period variations of the lake levels. Zn accordance with seasonal fluctuations, high lake levels on Lake Ontario generally occur in the spring, when run-off increases due to snowmelt, low rates of evaporation from the lake and evapotranspiration from the land surface.
Short-period fluctuations of, lake levels can be caused by wind blowing over the lake. This wind drives surface water in great volumes toward the shore, thus raising the water level at one side of the lake while lowering the water level at the other side. The effect of this wind set-up is more pronounced in bays where the rising water is concentrated in a restricted space within the shores of the bay.
Outflow from Lake Ontario is regulated by a powerhouse and dam at Barnhart Zsland, New York. The lake is controlled according to plan "1958-D", which tries to anticipate high and low water levels according to seasonal fluctuations. Large, long-term fluctuations of the lake sometimes make it difficult to maintain the desired range of lake levels.
Due to the relationship of the large lake area to the limited discharge capabilities of outflow streams, flood levels on the lake persist for a considerable time after the factors causing the high levels are removed (Reference 7).
The Znternational Joint Commission (ZJC) has published a report, Further causes for Great lake levels fluctuation, the results of gresent regulation, and investigates the feasibility of alternate possible regulation plans (Reference 8). This report states that the effects of shoreline erosion, a continuous process, are most pronounced during periods of high water. Hence, decisions concerning future regulat'on will have an effect on the Lake Ontario shoreline erosion problems existing in the Town of Scriba.
2e4 Flood Protection Measures The only flood protection structures within the Town of Scriba are individual seawalls constructed along Lake Ontario at various cottages in the attempt to orotect against erosion. The Scriba Town Board has also enacted an ordinance which regulates construction in flood hazard areas designated on the Flood Hazard Boundary Map for the Town of Scriba (References 9 and 10). No other flood protection measu es are employed in Scriba.
3~0 ENGINEERING METHODS Por the flooding sources studied in detail in the community, standard hydrologic and hydraulic study methods were used'o'etermine the flood hazard data for this study. Flood events of a magnitude which are expected to be equalled or exceeded once on the average during any 10-, 50-, 100-, or 500-year period (recurrence interval) have been selected as having special significance for flood plain management and for flood insurance premium rates-These events, commonly termed the 10-, 50-, 100-, and 500-year floods, have a 10-, 2-, 1-, and 0 ~ 2-percent chance, respectively, of being equalled or I
exceeded during any year. Although the recurrence interval represents the iong-term ~overs e period between dloods od a specific magnitude, rare dloods could occur at short intervals or even within the same year. The risk of experiencing a rare flood increases when periods greater than one year are considered. Por example, the risk of having a flood which equals or exceeds the 100-year flood (one-percent chance of annual occurrence) in any 50-year period is about 40 percent (four in,ten) and, for any 90-year period, the risk increases to about 60 percent (six in ten). The analyses reported here reflect flooding potentials, based on conditions existing in the community at the time of completion of this study. Maps and flood elevations will be amended periodically to reflect future changes.
- 3. 1 Hydrologic Analyses Hydrologic analyses were carried out to establish the peak discharge-frequency relationships for floods of the selected recurrence intervals for each flooding source studied in detail affecting the community.
The peak discharge-frequency relationship for the Oswego River was determined by a statistical analysis of the discharge records of USGS gaging station No. 04249000, located at Lock No. 7, Oswego, New York The analysis was performed with 39 years of record using the standard log-Pearson Type ZII method as outlined by the Water Resources Council (Reference 11). These results were then compared to the discharges developed by the USGS for the Flood Insurance Study for the City of Oswego (Reference 12). Since these previously developed discharges fell within the 50 percent confidence interval of the more recent estimates, the former have been adopted as the basis of the proposed discharges for the Flood Insurance Study for the Town of Scriba.
The peak discharges for Wine Creek were adopted from the Flood Insurance Study for the City of Oswego and adjusted based on reduction in drainage area (Reference 12) ~ Zn this study, flood-frequency relationships for Wine Creek were developed by averaging the results from the rainfall frequency-runoff relationships developed by the, SCS, and the results from the method developed by the USGS, Water Resources Division, New Jersey District (References 13 and 14) ~ This method relates peak flood discharge to drainage basin size, channel slope, surface storage within the basin, and an index of manmade impervious cover.
For Harbor Brook, peak discharges were also adopted from the Flood Insurance Study for the City of Oswego (Reference 12). The SCS rainfall frequency-runoff relationship was used to determine the discharges, and extends through the 100-year return period. The 500-year return period was determined by a straight line extrapolation. Reduction from upstream storage was not considered.
Peak discharges for Walker Creek were developed using the methodology of the Federal Highway Administration's (FHWA) Runoff Estimates for Small Rural Watersheds and checked by the SCS's method (References 15 and 13).
The peak discharges for Lycoming Creek were developed using the USGS Regional Water Supply Paper 1677, and checked by the FHWA's runoff estimates. (References 16 and 15) ~
The peak discharges for Cliff Road Creek and Lakeview Creek were developed using the methodology of the Bureau of Public Roads peak Rates of Runoff from Small Watetsheds, and checked by the PRWA method (References 17 and 15).
A summary of drainage area-peak discharge relationships for the streams studied by detailed methods is shown in Table 1, "Summary of Discharges".
TABLE 1 -
SUMMARY
OF DISCHARGES DRAINAGE AREA PEAK DISCHARGES (cfs )
FLOODING SOURCE AND LOCATION (sa. miles ) 10-YEAR 50-YEAR 100-YEAR 500-YEAR OSWEGO RIVER At the Town of Scriba corporate limits 5,096m 0 28P 570 35f 465 38f 460 45P 455 WINE CREEK At the Town of Scriba corporate limits 1 ~ 8 400 540 600 800 WALKER CREEK At confluence with Lake Ontario 3~ 9 380 640 740 1, 000 LYCOMZNG CREEK At confluence with Lake. Ontario 6.8 745 1, 030 1, 150 1, 330 CLIFF ROAD CREEK At confluence with Lake Ontario 1.9 275 400 455 ~ 595
TABLE 1 -
SUMMARY
OF DXSCHARGES - continued DRAINAGE AREA PEAK DISCHARGES (cfs)
LA1Q~VIEW CREEK At confluence with Lake Ontario 4' 470 700 810 1,090 HARBOR BROOK Approximately 12,040 feet above confluence with Lake Ontario 0 ' 290 440 48,0 560 Analyses were carried out to establish the peak elevation-frequency relationships for floods of the selected recurrence intervals for the portion of Lake Ontario studied in detail affecting the community-Analyses of elevations of Lake Ontario were based on records for the lake gages at Rochester, New York (19 years), Oswego, New York (40 years) and Cape Vincent, New York (58 years), as well as those at Port Weller (45 years), Toronto (60 years), Cobourg.(18 years) and Kingston (63 years),
on the Canadian side. Xn 1977, the COE determined the 10-, 50-, 100- and 500-year flood levels for 5 reaches along the United States shoreline of Lake Ontario (Reference 18). These levels are based upon frequency curves derived from the annual maximum flood levels recorded at each previously mentioned gage site, and adjusted to reflect present diversion and outlet conditions. Comparison of these flood levels with those used in completed Flood Insurance Studies in nearby communities resulted in no significant difference. Therefore, the COE's flood levels were adopted for use in this study.
A summary of elevation-frequency relationships for the section of Lake Ontario studied by detailed methods is shown in Table 2, "Summary of Elevations" ~
TABLE 2 -
SUMMARY
OF ELEVATXONS ELEVATION (feet)
FLOODING SOURCE AND LOCATION 10- YEAR 50- YEAR 100- YEAR 500- YEAR LAKE ONTARIO Entire shoreline within the Town of Scriba 248 ~ 7 249. 2 249.4 249 08 10
'I ~
The storm surge elevations for the 10-, 50-, 100-, and 500-year floods have been determined for Lake Ontario. The analyses reported herein reflect the still water elevations due to tidal and wind set up effects, but do not include the contxibutions from wave action effects such as the wave crest height and wave runup. Nonetheless, this additional hazard due to wave action effects should be considered in the planning of future development.
3~2 Hydraulic Analyses Analyses of the hydraulic characteristics of the flooding sources studied in detail were carried out to provide estimates of the elevations of floods of the selected recurrence intervals along each of these flooding sources.
Cross sections of overbank areas for the backwater analyses of the Oswego River, Wine Creek, Walker Creek, Lycoming Creek, Cliff Road Creek Lakeview Creek and Harbor Brook were obtained by photogrammetric methodsr the below-water sections were obtained by field measurement. All bridges, dams and culverts were surveyed to obtain elevation data and structural geometry. Cross sections were located at close intervals above and below bridges and culverts in order to compute. the significant backwater effects of these structures.
Channel roughness coefficients (Manning's "n") used in the hydraulic computations were chosen by engineering judgement and were based on field observations -of the stream's channel and flood plain areas Roughness values for the main channel of the Oswego River ranged from 0.035 to
- 0. 060 and the overbank values ranged from 0.10 to 0.15. Roughness values
~
for the main channel of Wine Creek ranged from 0 ~ 024 to 0.050 and the overbank values ranged from 0 ~ 05 to 0.10. For Walker Creek, the roughness values for the main channel ranged fxom 0.028 to 0.120, and the overbank values ranged from 0 07 to 0.25. Lycoming Creek roughness
~
values ranged from 0.03 to 0.10 for the main channel and from 0.07 to 0.25 for the overbank areas.- Cliff Road Creek roughness values xanged from 0.035 to 0.120 for the main channel and from 0.07 to 0.25 for the ovexbanks ~ Roughness values for the main channel of Lakeview Creek ranged rom 0.03 to 0.08 and the ovexbank values ranged from 0-09 to 0 20 ~
Mater-surface elevations for floods of the selected recurrence intervals were computed through the use of the COE HEC-2 step-backwater computer program (Reference 19) ~ Starting water-surface elevations for the Oswego River, Wine Creek, and Harbor Brook were taken from the Flood Insurance Study for the adjacent City of Oswego at the Oswego/Scriba corporate limits (Reference 12). Starting water-surface elevations for Walker 11,
0 Creek, Lycoming Creek, Cliff Road Creek and Lakeview Creek were determined by the slope/area method. Por Walker Creek, the starting water-surface elevations determined by these methods were developed at cross sections downstream of the limits of the study. The computed water-surface profile through these downstream reaches converged to the true elevation at the first cross section at the beginning of the detailed study limits Flood profiles were drawn showing computed water-surface elevations to an accuracy of 0.5 foot for floods of the selected recurrence intervals.
Por Harbor Brook, flood profiles were adopted from the City of Oswego Flood Insurance Study (Reference 12).
Locations of selected cross sections used in the hydraulic analyses are shown on the Flood profiles (Exhibit 1). For stream segments for which a floodway is computed (Section 4.2), selected cross-section locations are also shown on the Flood Boundary and Floodway Map (Exhibit 3).
All elevations used in this study are referenced to the National Geodetic Vertical Datum of 1929 (NGVD), formerly referred to as Sea Level Datum of 1929. Locations of the elevation reference marks used in the study are shown on the maps.
The hydraulic analyses for this study are based on the effects of unob-structed flow. The flood elevations shown on the profiles are valid only if hydraulic structures remain unobstructed and do not fail Flood information for Lakeview Creek Tributaries 1 and 2, Deer Ridge Creek, Deer Ridge Creek Tributary and the remainder of Wine Creek studied by approximate methods, was obtained by use of the SCS runoff curves and the hydrology and flood depth results of certain detailed flooding sources (Reference 13) ~ Flood depths were then determined by normal slope/area methods using Manning's equation, and by culvert and bridge flow capacity analyses at, crossings. Flood information for the remaining streams and tributaries studied by approximate methods was obtained from the PIA Flood Hazard Boundary Map for the Town of Scriba (Reference 10).
4~0 PLOOD PLAIN MANAGEMENT APPLICATIONS The National Flood Insurance Program encourages state and local governments to adopt sound flood plain management programs. Therefore, each Flood Insurance Study includes a flood boundary map designed to assist communities in devel-oping sound flood plain management measures.
12
4.1 Flood Boundaries In order to provide a national standard without regional discrimination, the 100-year flood has been adopted by the FEHA as the base flood for pur-poses of flood plain management measures. The 500-year flood is employed to indicate additional areas of flood risk in the community. Por the Lake Ontario shoreline studied in detail, the boundaries of the 100- and 500-year flood levels have been delineated using the storm water elevations. The topographic maps used to delineate lake flooding were either prepared from aerial photography at a scale of 1:4,800 with a contour interval of 5 feet or were USGS topographic maps at a scale of 1:24,000 with a contour interval of 10 feet (References 20 and 21). For each stream studied in detail, the boundaries of the 100>> and 500-year floods have been delineated using the flood elevations determined at each cross section; between cross sections, the boundaries were interpolated using topographic maps prepared from aerial photographs at a scale of 1: 4,800 with a contour interval of 5 feet (Reference 20) ~ In cases where the 100- and 500-year flood boundaries are close together, only the 100-year boundary has been shown.
Flood boundaries for Lakeview Creek Tributaries 1 and 2, Deer Ridge Creek, Deer Ridge Creek Tributary and the remainder of Wine Creek studied by approximate methods were plotted on USGS topographic maps (Reference
- 21) ~ Flood boundaries for these streams were further verified by examination of aerial photographs or field inspection.
Flood boundaries for the 'remaining streams and tributaries studied by approximate methods were transferred to USGS maps from the Flood Hazard Boundary Maps for the Town of Scriba (Reference 10).
The area east of Lycoming Road at Lycoming Creek has been classified as a divergent flow area. Surcharging flow at the southern crossing of Lycoming Road would short circut and flow at undetermined depths along the eastern side of Lycoming Road to where it enters Lycoming Creek again just downstream of the northern crossing of Lycoming Road. Since the depth of this flooding is probably less than one foot, the area has been designated Zone B.
The boundaries of the 100- and 500-year floods are shown on the Flood Boundary and Ploodway Map (Exhibit 3). Small areas within the flood boundaries may lie above the flood elevations and, therefore, may not be subject to flooding. Owing to limitations of the map scale and lack of detailed topographic data, such areas are not shown.
4o2 Ploodways Encroachment on flood plains, such as artificial fill, reduces the flood-carrying capacity, increases the flood heights of streams, and 13
increases flood hazards in areas beyond the encroachment itself. One aspect of flood plain management involves balancing the economic gain from flood plain development against the resulting increase in flood hazard. For purposes of the Flood Insurance Program, the concept of a floodway is used as a tool to assist local communities in this aspect of flood plain management. Under this concept, the area of the 100-year flood is divided into a floodway and a floodway fringe. The floodway is the channel of a stream plus any adjacent flood plain areas that must be kept free of encroachment in order that the 100-year flood can be carried without substantial increases in flood heights. Minimum standards of the FEMA limit such increases in flood heights to 1.0 foot, provided that hazardous velocities are not produced. The floodways in this report are presented to local agencies as minimum standards that can be adopted or that can be used as a basis for additional studies.
The floodways presented in this study were computed on the basis of ecpxal conveyance reduction from each side of the flood plains. The results of these computations are tabulated at selected cross sections for each stream segment for which a floodway is computed (Table 3)
As shown on the Flood Boundary and Floodway Map (Exhibit 3), the floodway widths were determined at cross sections; between cross sections, the boundaries were interpolated. In cases where the boundaries of the flood-way and the 100-year flood are either close together or collinear, only the floodway boundary has been shown. Portions of the floodway widths for the Oswego River extend beyond the corporate limits.
The area between the floodway and the boundary of the 100-year flood is termed the fl'oodway. fringe. The floodway fringe thus encompasses the portion of the flood plain that could be completely obstructed without increasing the water-surface elevation of the 100-year flood by more than 1.0 foot at any point. Typical relationships between the floodway and the floodway fringe and their significance to flood plain development are shown in Figure 3.
5~0 INSURANCE APPLICATION In order to establish actuarial insurance rates, the FEMA has developed a pro-cess to transform the data from the engineering study into flood insurance criteria. This process includes the d'etermination of reaches, Flood Hazard Factors (FHFs ), and flood insurance zone designations for each flooding source affecting the Town of Scriba.
5~ 1 Reach Determinations Reaches are defined as lengths of watercourses having relatively the same flood hazard, based on the average weighted difference in water-surface 14
l FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION WIDTH SECTION MEAN WITH CROSS SECTION DISTANCE AREA REGULATORY INCREASE (FT.) VELOCITY FLOODWAY FLOODWAY (SO. FT.) (F.P.S.) (NGVD) (FEET)
Oswego River AA 16, 0501 4763 13, 792 2 7 296+7 296 ~ 7 296 ~ 7 0.0 AB 18,O1O'0, 5023 13, 530 2.8 296 ' 296 ~ 8 296 ' 0.0 AC 2801 7793 15,845 2~4 297 ' 297 ~ 0 297 ' 0~0 AD 22,4901 6643 11,958 3 2 297 ' 297 ~ 2 297.2 0~ 0 AE 24 7601 4983 9,727 3 9 297 ' 297 ~ 6 297 ' 0~0 AF 25,6201 4863 9, 183 4~ 1 297.8 297 ' 297 ' 0~0
(/ine Creek 802 49 458 1 ~ 3 343 ~ 1 343 ~ 1 343 1 0~ 0 8 6202 219 1,698 0~ 3 343 1 343 ~ 1 343~ 1 0~0 C 9702 387 1,338 0 ' 343 1 343 ~ 1 343 ~ 1 0~0 D 1,690 35 308 1 ~ 9 343. 1 343 ~ 1 343 ~ 1 0~0 E 2, 1102 50 410 1 4 343. 1 343 ~ 1 323 2 0 1 2,3852 32 294 2' 343 ~ 1 343 ~ 1 343 ' 0.1 2,5452 92 556 1 ~ 0 343 ' 343 7 343 7 0~0 H 3; 1302 39 343 1 ~ 7 343 ' 343 ' 343 8 0 1 3,2852 37 332 1 ~ 8 343+7 343 ' 343~8 0~ 1 Feet above confluence with Lake Ontario Feet above corporate limits This width extends beyond corporate limits FEDERAL EMERGENCY MANAGEMENTAGENCY FLOODWAY DATA TOIN OF SGRIBA, NY
- (oswEGo co.) OSWEGO RIVER AND WINE CREEK
FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION WIDTH SECTION MEAN WITHOUT WITH REGULATORY INCREASE CROSS SECTION DISTANCE AREA VELOCITY FLOODWAY FLOODWAY (FT.) (SQ. FT.) (F.P.S.)
(NGVD) (NGVD) (NGVD) (FEET)
Wine Creek (Continued)
J 3,7551 29 279 2~ 1 343.7 343 ~ 7 343. 9 0~2 K 3, 9251 333 2,975 0~2 345 ~ 1 345 ~ 1 345 ~ 2 p.1 L 4,6051 872 7,286 0~0 345 ~ 1 345 ~ 1 345 2 0~ 1 Walker Creek A 15,0302 40 284 2~5 342 ~ 0 342 ' 342 0 0~0 B 15,3102 152 791 Oi9 324 ~ 0 324 ' 324 ~ 1 0.1 C 16i 4702 20 70 10 ~ 5 329.5 329 ' 329. 8 Oi3 D 17,3202 142 595 1 ~ 2 334.0 334 ' 334. 9 0 9 E 17,9652 55 237 3.1 335. 4 335.4 336 ~ 1 0 7 F 18,4502 107 347 .2 ~ 1 337 ~ 7 337.7 338 ' 0.9 G 18,8852 35 114 6 4 340 ~ 1 340 ~ 1 340 ' 0.6 H 19,0502 200 959 0.7 342.2 342 2 343 2 1 ~ 0 I 19,4202 91 329 2~2 342 ' 342 ' 343 2 1 ~ 0 J 19 77P 85 394 1 ~8 345 ' 345 ' 346 ~ 8 0 '
K 19 9452 139 515 1 ~4 346 ~ 1 346 1 347 ~ 0 0 '
L 20 i 1502 23 100 7~3 346 ~ 3 346 3 347.3 0~9 M 20,3002 128 1, 192 0~6 354 ' 354 ' 354 ' 0.2 1Feet above corporate limits Feet above confluence with Lake Ontario FEDERAL EMERGENCY MANAGEMENTAGENCY Ft.000NAY OATA
'OIH OF SCHtBA, NY
.;. (oswEGo co.) WINE CREEK AND WALKER CREEK
FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION 1 WIDTH SECTION MEAN WITHOUT " WITH CROSS SECTION DISTANCE AREA VELOCITY FLOODWAY INCREASE IFT.) (NGVVA ) FLOODWAY
{SQ. FT.) (F.P.S.) {NGVD) (NGVD) {FEET)
Lycoming Creek A 760 47 185 6+2 256 ~ 2 256 ' 256 ~ 2 0 '
B 915 151 947 1 ~2 260 ~ 4 260+4 260o4 0 '
C 1,610 104 675 1 ~7 260 ~ 6 260 ' 260 ~ 6 0 '
D 2,460 61 219 5.2 261 ~ 0 261 ~ 0 261 ~ 2 0 '
E 2,830 99 431 2' 263 ' 263 ' 263 ~ 4 0.4 F 3,280 130 592 1 ~ 9 264 ' 264 ' 265 ~ 0 0 '
G 3,870 66 355 3~2 265 ' 265 ' ,
266 ~ 0 0 '
H 4, 110 162 860 1 ~3 265 ' 265.5 266. 3 0 ~ 8 I 4,615 40 138 8+3 266 ' 266 ' 267 ' 0~5 J 4,760 274 2i003 0 ' 277 ' 277 ' 277 ~ 2 0~0 K 5i240 559 3,437 0~3 277 ' 277 ~ 2 277 ~ 2 0~0 L 5,950 396 2,638 0~4 277 ~ 2 277.2 277 2 0~0 M 6,360 473 3,310 0~3 277 ' 277 ' 277 ' 0~0 N 6,805 787 4,734 0~2 277 ~ 2 277 ' 277 2 0~0 0 7, 545 887 5,429 0 2 277 ' 277 ~ 3 277 ~ 3 0~0 P 7,995 404 1,955 0~5 277.3 277 ~ 3 277 ~ 3 0~0 Q 8, 135 284 1,967 0~5 281 ~ 7 281 ~ 7 281 ~ 7 0~0 R 8,380 236 1,922 0~5 281 ~ 7 281 7 281 ~ 7 0~0 S 8, 740 636 5,075 0~2 281 ~ 7 281 ~ 7 28107 0~0 1Feet above confluence with Lake Ontario FEDERAL EMERGENCY MANAGEMENTAGENCY FLOODIAY DATA TOWN OF SCRlBA,-NY
- -'oswEGo co.). LYCOMING CREEK'.
FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION WIDTH SECTION MEAN WITHOUT WITH CROSS SECTION DISTANCE 1 AREA VELOCITY REGULATORY INCREASE
{FT.) (NGVD) FLOODWAY FJ.OODWAY (SQ. FT.) (F.P.S.) {NGVD) (NGVD) (FEET)
Lycoming Creek (Continued)
T 9, 160 570 2t 614 0 4 281 ~ 7 281 ~ 7 281 7 0 0 U 9,620 120 476 2.4 281 ~ 7 281.7 281 ~ 7 0.0 V 10, 380 70 444 2 5 284.6 284+6 285 ~ 1 0.5 W 10,540 222 1,616 0 ' 287 ' 287 ~ 4 287 ' 0~3 X 10,860 107 806 1 4 287 ~ 7 287 ' 288 1 0 4 Y 11,260 39 164 6 9 288 ~ 3 288e3 289 ' 0~9 Z 11,960 685 2,303 0 4 295.4 295 ' 296 ~ 1 0~7 AA 12,205 144 693 1.6 296 ' 296 ' 297 ' 0~9 AB 13,235 61 321 3~5 305 ~ 1 305 ~ 1 305 ' 0.8 AC 13,885 140 602 1 ~ 9 312 ~ 2 312 ~ 2 312 ~ 2 0 '
AD .14,595 584 2t 831 0 4 314 7 314 ~ 7 315 ~ 2 0.5 AE 15,295 357 2,287 0 ' 316. 6 316+6 327 5 0 '
AF 15,975 91 628 1 ~ 8 317 ~ 5 317 ~ 5 318. 4 0 '
AG 16,375 25 146 7' 317 5 317 ~ 5 318 ~ 5 1 0 AH 16,555 482 4,435 0 ' 323 ~ 5 323 ' 323 5 0 '
AI 17,045 137 618 1 ~ 8 323 7 323 ~ 7 323 ' 0~ 1 AJ 17,355 129 542 2~ 323.9 323 ' 324 ' 0 '
AK 17, 515 183 1i306 0.8 329 2 329 ' 329.2 0 0 il "Feet above confluence with Lake Ontario FEDERAL EMERGENCY MANAGEMENTAGENCY FLOODWAY .DATA TOWN. OF SCBIBA, NY (oswEeo ca.)- - --. .LYCOMING CREEK
FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION WIDTH SECTION MEAN WITH CROSS SECTION DISTANCE 1 AREA VELOCITY REGULATORY INCREASE IFT.) FLOODWAY FLOODWAY ISO. FT.) IF.P.S.) INGVD) {FEET)
Cliff Road Cree A 345 22 118 3~8 249+9 249' 249 ' 0 '
B 1, 125 53 268 1 ~ 6 253.9 253 ~ 9 253 ' 0 '
C 1,590 66 73 6 1 259+ 1 259 1 259 ~ 1 0~0 D 1,970 264 549 0 ' 263 ~ 8 263.8 263 ~ 9 0~ 1 E 2,525 71 181 2.5 265 ' 265.9 266 ~ 7 0 '
F 2,925 43 113 3 ' 270 ' 270~8 271 ~ 7 0 '
G 3,040 85 539 0 ' 276~2 276 ' 276 ~ 2 0 '
H 3,220 462 1,728 0 ' 277 ' 277 ' 277+4 0+0 I 3,420 169 701 0 ' 277 ' 277 ' 277 ' 0 0 J 3,720 182 669 0 ' 277 ' 277 ' 277 ' 0 '
K 4,090 302 676 0' 277 ' 277.5 277 ' 0.1 L 4,375 313 914 0 ' 277 ' 277 ' 277 ' 0.1 M 4,525 450 1, 646 0' 277 ' 277 ' 277 ~ 7 Oo1 N 4,780 239 951 0~4 277+6 277 ' 277 ' 0~ 1 0 5,030 220 1, 242 0 ' 277 ' 277 ' 277.7 0.1 P 5, 160 241 939 0.4 277+6 277 ' 277 ~ 7 0~ 1 Q 5,410 154 407 1 ~ 1 277 ' 277 ' 277 ' 0~ 1 R 5,580 140 463 0~9 277 ' 277 ' 277 ' 0 2
~
S 6,090 410 1,336 0 ' 277 ~ 7 277 7 277 F 9 0~2 1Feet above confluence with Lake Ontario FEDERAL EMERGENCY MANAGEMENTAGENCY FLOODWAY DATA TOWN OF SCBIBA. NY (ose~eo co.) CL)'FF ROAD CREEK
FLOODING SOURCE FLOODWAY BASE FLOOD WATER SURFACE ELEVATION WIDTH SECTION MEAN WITHOUT WITH CROSS SECTION D ISTANCE1 AREA VELOCITY REGULATORY INCREASE IFT.) INGVD) FLOODWAY FLOODWAY ISO. FT.) (F.P.S.) INGVD) INGVD) IFEET)
Cliff Road Creek (Continued)
T 6,530 72 110 4~ 1 278 ~ 7 278 ' 278+7 0~0 U 6,900 108 279 1 ~ 6 283.9 283 ' 284. 1 042 V 7, 190 70 319 1.4 284 7 284 7 285 ~ 0 0~0 W 7,970 76 165 2~7 287 ' 287 ' 288 ~ 1 0 '
X 8,600 47 143 3 ~ 1 296.4 296.4 296.4 0.0 Y 9, 130 31 149 3 ' 301.3 301 ~ 3 302 ' 0.7 9, 355 60 253 1.7 302.7 302 ' 303 ' 0.7 M 9i 620 72 257 1 ~ 7 303 8 303 ' 304 ' 0~7 Lakeview Creek A 255 84 300 2 ' 249.0 246 ~ 02 24900 0.0 B 375 107 606 1 3 253,9 253 ~ 9 254 ' 0~8 C 755 66 287 2~8 254 0 254 ' 254 8 0~8 D 1,225 35 135 5~9 259 ~ 1 259 ~ 1 259 ' Oe7 E 1,940 243 933 0~8 261 ~ 7 261 ~ 7 262 ' 0.7 F 2,330 56 247 3~2 262 ' 262 4 263 ' 0.8 Feet above confluence with Lake Ontario Elevations computed without consideration of backwater effects from Lake Ontario FEDERAL EMERGENCY MANAGEMENTAGENCY FlOODIAY DATA TOWN OF SCRIBA, NY . CLIF.F.ROAD GREEK (osweeo co.)- AND LAKEVIEW CREEK
100 YEAR FLOOD PLAIN FLOODWAY FLOODWAY FLOODWAY FRINGE FRINGE STREAM CHANNKL FLOOD ELEVATION WHEN CONFINED WlTHIN FLOODWAY ENCROACHMENT ENCROACHMENT
'Vg0TI >,@44~@j SURCHARGE~ (4PY".> 4L~>kP>i 8
,c g~<.,ps'). g AREA OF FLOOD PLAIN THAT COULD FLOOD ELEVATION SE USED FOR DEVELOPMENT 8Y EEFOR E ENCROACHMENT RAISING GROUND ON FLOOD PLAIN LINE A ~ 8 IS THE FLOOD ELEVATIONBEFORE ENCROACHMENT LINE C ~ D IS THE FLOOD ELEVATIONAFTER ENCROACHMENT
~SURCHARGE NOT TO EXCEED 1 0 FOOT IFEMA REOUIREMENTI OR LESSER AMOUNTIF SPECIFIED 8Y STATE.
FLOOOWAY SCHEMATIC elevations between the 10- and 100-year floods. This difference does not have a variation greater than that indicated in the following table for more than 20 percent of the reach.
Average Difference Between 10- and 100-Year Floods Variation Less than 2 feet 0.5 foot 2 to 7 feet 1 ~ 0 foot 7.1 to 12 feet 2.0 feet Nore than 12 feet 3.0 feet The locations of the reaches determined for the flooding sources of the Town of Scriba are shown on the Flood Profiles (Exhibit 1) and are summarized in the Flood Insurance Zone Data Table (Table 4).
21
0 ELEVATIONDIFFERENCE BETWEEN 1A% (100-YEAR) FLOOD AND BASE FLOOD3 FLOODINO SOURCE PANEL FHF 20NE ELEVATION 0.2%
{50 YR.) I500 YR.) INGVD)
{10 YR.)
Lake Ontario Reach 1 -0 ' -0 ~ 2 +0.4 005 249 Oswego River Reach 1 10 -1 ~ 8 -0 ~ 7 +1 ~ 0 020 Varies Wine Creek Reach 1 10 -1 ~ 2 -0 ' +0 ' 010 Varies Walker Creek Reach 1 05 -2 ~ 0 -0 ~ 1 +0 3 020 A4 Varies Reach 2 05 -2 ' -0 ' +1.8 025 A5 Varies Reach 3 05 -1 ~ 1 -0 ' +0 ' 010 A2 Varies Lycoming Creek Reach 1 '5 -1 ~ 3 -0 ' +0 ' 015 A3 Varies Reach 2 05 -2 ' -0 ' +F 8 025 A5 Varies Reach 3 05 -1 ~ 2 -0 ' +0.5 010 A2 Varies Flood Insurance Rate Map Panel Weighted Average Rounded to the nearest foot see map FEDERAL EMERGENCY MANAGEMENTAGENCY FLOOD )NSORANCF. ZONE DATA
,.TBNN BF SCRIBA, NY LAKE ONTARIO; OSWEGO RIVER, WINE CREEK, (OSWEGO CO.) --, WALKER CREEK AND LYCOMING CREEK
ELEVATIONDIFFERENCE BETWEEN 1.0% (100-YEAR) FLOOD AND BASE FLOODS FLOODING SOURCE PANEL FHF ZONE ELEVATION 101C 0~ (NGVD)
(10 YR.) (60 YR.) (600 YR.)
'liff Road Creek Reach 1 05 -1 ~ 1 -0 ~ 3 +0.6 010 A2 Varies Reach 2 05 -0.5 -0.2 +0 ' 005 A1 Varies Reach 3 05 -1 +8 -0.2 +0 ' 020 A4 Varies Reach 4 05 -0.8 -0 ~ 2 +0 ' 010 A2 Varies Lakeview Creek Reach 1 05 -1 0 0 ' +0 ' 010 Varies Harbor Brook Reach 1 <10 -0 ' 0 ' +0 ' 005 A1 Varies Flood Insurance Rate Hap Panel Weighted Average Rounded to the nearest foot see map FEDERAL EMERGENCY MANAGEMENTAGENCY FLOOD INSURANCE ZONE DATA TOIN OF BCBIBA. IIY CLIFF ROAD CREEK LAKEVkEW CREEK (oswEGo co.) AQD HARBOh BR00
Zn lacustrine areas, reaches are limited to the distance for which the difference between the 10- and 100-year flood elevations does not vary more than 1.0 foot. Using these criteria, the Lake Ontario shoreline qualifies as one reach. The location of this reach is shown on the Flood Insurance Rate Map 5.2 Flood Hazard Pactors The PHP is the FEMA device used to correlate flood information with insur-ance rate tables. Correlations between property damage from floods and their PHFs are used to set actuarial insurance premium rate tables based on FHFs from 005 to 200.
The FHF for a reach is the average weighted difference between the 10-and 100-year flood water-surface elevations expressed to the nearest 0.5 foot, and shown as a threeMigit code. For example, if the difference between water-surface elevations of the 10- and 100-year floods is 0.7 foot, the FHP is 005; if the difference is 1.4 feet, the FHP is 015; if the difference- is 5.0 feet, the PHP is 050. Nhen the difference between the 10- and 100-year water-surface elevations is greater than 10 ~ 0 feet, accuracy for the FHP is to the nearest foot.
5.3 Flood Xnsurance Zones After the determination of reaches and their respective FHFs, the entire incorporated area of the Town of Scriba was divided into zones, each having a specific flood potential or hazard., Each zone was assigned one of the following flood insurance zone designations:
Zone A: Special Flood Hazard Areas inundated by the 100-year flood, determined by approximate methodss no base flood elevations shown or PHPs determined.
Zone A1, A2, A3, Special Flood Hazard Areas inundated by the 100-year A4 and AS flood, determined by detailed methods; base flood ele-vations shown, and zones subdivided according to FHF.
Zone B: Areas between the Special Flood Hazard Area and the limits of the 500-year flood, including areas of the 500-year flood plain that are protected from the 100-year flood by dike, levee, or other water control structure; also, areas subject to certain types of 100-year shallow flooding where depths are less than 1 ' foot; and areas subject to 100-year flooding from sources with drainage areas less than 1 square mile.
Zone B is not subdivided.
Zone C: Areas of minimal flooding.
Table 4, "Flood Insurance Zone Data," summarizes the flood elevation dif-ferences, FHFs,'flood insurance zones, and base flood,elevations for the flooding sources studied in detail in the Town of Scriba.
5.4 Flood Insurance Rate Map Description The Flood Insurance Rate Map for the Town of Scriba is, for insurance purposes, the principal result of the Flood Insurance Study. This map (published separately) contains the official delineation of flood insurance zones and base flood elevation lines. Base flood elevation lines show the locations of the expected whole-foot water-surface elevations of the base (100-year) flood. This map"is developed irr accordance with the latest flood insurance map preparation guidelines published by the FEMA 6o 0 OTHER STUDIES Flood Insurance Studies are currently being prepared for the Towns of Oswego, New Haven, Volney, Granby, Schroeppel and Lysander and for the City of Fulton (References 22, 23, 24, 25, 26, 27 and 28). A Flood Insurance Study has already been published for the City of Oswego (Reference 12) ~ The data pertaining to Harbor Brook were adopted from this study. All of these studies have analyzed in detail portions of the Oswego River, with the exception of the Town of Oswego and the Town of New Haven studies. The results of those analyses will be fully compatible with the results of this study. Zn addition, since the Towns of Minetto, Volney, and New Haven and the City of Oswego are all adjacent to Scriba, the flood boundaries, floodway limits and flood profiles for their respective studies must be reconciled. The final results of these studies will match exactly with the results of this study.
This study is authoritative for purposes of the Flood Insurance Program, and the data presented here either supersede or are compatible with previous deter-minations-
- 7. 0 LOCATION OF DATA Survey, hydrologic, hydraulic, and other pertinent data used in this study can be obtained by contacting the office of the Insurance and Mitigation Division of the Federal Emergency Management Agency, Regional Director, Region IZ Office, 26 Federal Plaza, Room 19-100, New York, New York 10278.
8o 0 BIBLIOGRAPHY AND REPLACES
- 1. U. S Department of Commerce, Bureau of the Census, 1970 Census of Office, Washington, D. C., 1971.
25
2~ Oswego County planning Board, ~Oswe o ~Count Data, Oswego, New York, 1977 '
~ Oswego County Planning Board, Wetlands of 0~see o ~Count, New York: An tn~ntornr and ~anal sis, Fulton, New York, May 1973.
4e U. S. Department of Commerce, National Oceanic and Atmospheric Administration, Climatography of the United States, No. 60-30, Climates of the United States, New York by A. B. Pack, Silver Spring, Maryland, June 1972 ~
- 5. U. S Army Corps of Engineers, Buffalo District ~Re ort of Ploodf
~Tro ical Storm ~A>es, June 1972: ~oswe o River Basin, Buffalo, New York, August 1 973 ~
6~ St. Lawrence-Eastern Ontario Commission, Lake Ontario and the St.
by D J Palm, Ph.DWF Watertown, New York, March 1975.
7e
~au crier and Ontario, Plan SO-901, Detroit, Michigan, Septemher 1974 ~
8~
Ottawa, Quebec, Canada, '1976.
- 9. Town of Scriba, New York Town Board, Ordinance, "Protection of Construction in Areas Susceptible to Flood", Town of Scriba, New Yorkf 1978 ~
10 ~ U. S. Department of Housing and Urban Development, Federal Insurance Adad.nistration, Flood Nazard Bo~~zor ~Ma, Town of scriha ~oswe o C~ount New York, Washington, D CeF July 19, 1974 1 1 ~ Water Resources Council, "Guidelines for Determining Flood Plow Fre-quency," Bulletin 17A, Washington, D. CMF June 1977.
12 ~ U. S. Department of Housing and Urban Development, Federal Insurance Administration, piped Insurance ~Stud, ~Cit of 0~see o, ~Oswe o ~Count, New York, U S Government Printing Office, Washington, D. C, May 16F 1977.
1 3~ U. S. Department of Agriculture, Soil Conservation Service, Technical Watersheds, Washington, D C F April 1973.
14 ~ State of New Jersey, Department of Environmental Protection, Division of Water Resources, in cooperation with the U. S. Geological Survey, Special Report 30, ~ccnitude and ~Frecuenc of Floods in New berne with Effects of Urbanization by Stephen J. Stankowski, Trenton, New Jersey, 1974 ~
26
15, U. S. Department of Commerce, Federal Highway Administration, Runoff Estimates for Small Rural Watersheds,washington, D. C., October 1977.
16.~ U.~ S Department of the Znterior, Geological Survey, Water-Supply Paper 1677, ~Ma nitude and ~Fre x~enc of Floods in the United States, Part 4.
St Lawrence River Basin by S. W Wiitala, Washington, D. C., 1965 ~
- 17. U. S. Department of Commerce, Bureau of Public Roads, Peak Rates of Run-off from Small Watersheds, Washington, D. C., October 1977 ~
18 '
m' S Army Corps of Engineers, Detroit District, ~Re ort on Great Lakes of Engineers, Hydrologic Engineering Center, HEC-2
'19.
U. S. army Corps Water Surface Profiles, Generalized ~Com ter ~Pro ramD,avis, California, October. 1973.
~Ma)~in, Scale 1:4,800, Contour Znterval 5 Feet: Town of Scriba, New York.
U. S- Department of the Znterior, Geological Survey, 7.5 Minute Series New York, 1956'swego East, New York, 1954'exas, New York, 1955; West of Texas, New York, 1955.
- 22. Federal Emergency Management Agency, Federal Znsurance Administration, Flood Znsuzance Study, Town of O~eceo, ~oswe o ~Count, New York (Unpublished) ~
- 23. Federal Emergency Management Agency, Federal Znsurance Administration, Piped Znsuzance Stu(g, Town of New Haven, ~oswe o ~Count, New York (Unpublished) ~
- 24. Federal Emergency Management. Agency, Federal Znsurance Administration, Flood Insurance Study, Town of V~olne, ~oswe o ~Count, New York (Unpublished) ~
- 25. Federal Emergency Management Agency, Federal Znsurance Administrationf Flood Insuzance ~Stud, Town of ~Grant, ~oswe o ~Count, New York (Unpublished) ~
- 26. Federal Emergency Management Agency, Federal Znsurance Administrationf (Unpublished) ~
27
- 27. Federal Emergency Management Agency, Federal Insurance Administration, Flood Znsurance Study, Town of ~Lsander, ~Oswe o ~Count, New York (Unpublished) ~
- 28. Federal Emergency Management Agency, Federal Insurance Administration, Flood Znsurance Stu(2Z, ~Cit of pulton, ~oswe o Coun~, New York (Unpublished) ~
New York State Department of Transportation, 7 5 Minute Series Planimetric
~Ma sf Scale 1:24,000, Contour Interval 10 Feet: New Haven, Second Edition, 1975> Oswego East, Second Edition, 1975; Texas, Second Edition, 1975; West of Texas, Second Edition, 1975 ~
Oswego County Department of public Works, ~Na of 0~see o ~Count, New York, Scale 1 Inch Ecpxals 2 Miles, The National Survey, Chester, Vermontf 19'74 ~
the EEC-2 ~Ezid e Routines, ~Trainin Document No. 6, Davis, California, June 1974m U. S. llrmy Corps of Engineers, Eydzologic Engineering Center, ~Floodwa Detezmination U~sin Computer Prorram SEC-2, ~Tzainin Document No. 5, Davis, California, May 1974-U. S. ~Y Corps of ENgineers, south atlantic Division ~yzoodwa ~esicen Considerations, September 1978 ~
U. S Department of the Interior, Geological Survey, Bulletin 68, Characteristics of New York Lakes, part 1, Gazetteer of lakes, Ponds and Reservoirs by P~ E. Greeson and F. L Robi.nson, washington, D. C., 1970 ~
State of New York, Scale 1:500,000, Reston, Virginia, 1975 ~
28
I C
IL'Jj CIO Ial R
O Llj O
K 266 I
280 g
276 27S O
Z o
K 270 270 172 o SIXI YEAR FLOOD Qo CO ~
100 YEAR FLOOD U. w 265 60 YEAR FLOOD Oo 10 YEAR FLOOD K STREAQ SED O
CROSS SECTION I-LOCATION 16.0 16.6 17.0 17.6 IILO ~ IIL6 10.0 11.6 .20.0 20.6 21 A)
ST REAM DISTANCE IN THOUSANDS OF F E ET ABOVE CONF LU ENCE WITH LAKE ONTARIO OlP
40 lab O
CR UJ Cl a V o
O 5
290 I
286 o~ 285 I
J O
h.5 215
<<t 216 e'8 Cb o LEOEND
~ oo 500 YE'AR F LOOD E3 CO I00 YEAR FLOOD 210 50 YEAR FLOOD 10 YEAR FLOOD ug 8 STREAM BED ~$ g CROSS SECTION LOCATION 265 2I.O 21.6 22.0 23.6 24.0 2i.s 250 25$ 28AI STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 02P
CA lsd ika III I2:
0 CJ Ch IIJ CI z
~ eJ a Ih 0
Z 340 I
0g 335 I
0 Z;
us ~
32S
<o S00 YEAR FLOOD l00 YEAR FLOOD
'3 u)
U-00 YEAR FLOOD g Do eo I 0 YEAR FLOOD STREAM BEO xj Z .
CC CROSS SECTION LOCATION 9
1.60 2.00 2.fi0 3.00 STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CORPORATE LIMITS 03P
0 7
ILI W
Ch
~ aa 330 I
~ 326 O
I 315 315 LEOEND u
~c
) O2oo 600 YEAR FLOOD ,< oo 100 YEAR FLOOD 60 YEAR FLOOD
< n 310 Q o 10 YEAR FLOOD STREAM BEO fj CROSS SECTION LOCATION o 11.8 16.2 1&.6 1$ .0 HL4 18.8 11.2 Isa IILO 'IIL1 STREAM DISTANCE IN TIIOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 04P
~ <
h
'I CR ce4 4 le 350 I
IL 3IS gI u
Z 4
Z Ol o LEGEND 600 YEAR FLOOD g<<ul l00 YEAR FLOOD 80 YEAR FLOOD 10 YEAR FLOOD 4-'o z
us),
U- ea Pl Jw STREAM SED CROSS SECTIOtl c I-LOCATION IIL4 18.8 I 92 19.8 20.0 20A STREAM DISTANCE IN TtIOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTAttiO 05P
0 4A )C 216 215 I@i Ill Di las I2:
CJ CC O
210 220 Ch coal Ik a
l5 K
265 I
0g 260 I
9 266
)
I Z
pg
<<C ill '$ O)
LE SEND 600 YEAR FLOOD
~4 5o Vl ~~
100 YEAR FLOOD 60 YEAR FLOOD 245 10 YEAR FLOOD STREAM SEO CROSS SECTION LOCATION 240 0.60 1.60 ~ 2AO 2.60 3.00 3.60 4Q STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO
Ql
~4 u 58 Ch C5 CI IA V-285 I
280 gI 275 276 2
0 270 270 500 YEAR FLOOD u o 100 YEAR FLOOD 50 YEAR FLOOD 255 10 YEAR FLOOD STREAM 8 ED CROSS SECTION LOCATION 8.00 ~ 8.50 8.00 Q,50 104 10.5 12.0 STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONF LUENCE VIITIILAKE ONTARIO
leA 326 ~ hC 325 laI MI
~ ke IL CS LJ 0
Cl la 5
315 I 315 W
z O
310 310 I
O LEGEND QO YEAR FLOOD 100 YEAR FLOOD 60 YEAR FLOOD 10 YEAR FLOOD STREAM SED CROSS SECTION LOCATION 12.5 13.0 ILO < N.6 16.0 16.6 IS.O IIL6 17.6 16.4 STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 08P
k eI SC
~O lal lpga C5 CN'5 O
210 CS 210 Cl Ih 255 I
W IL 260 g
I 255 y$ cC LEOEND
- SOOYEAR FLOOD OT a 100 YEAR FLOOD 245 50 YEAR FLOOD 10 YEAR FLOOD ill STREAM BEO
>~o CROSS SECTION 240
- 6. LOCATION 0.20 OAO 0.50 e '.80 1.00 1.20 IAO 1.60 1.80 2.20 QAO P.OO STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO
0 C
40 Y
IIJ ill Ik O
Cl U U
~ ba Z
O 280 I ~
280 IL zo 276 276 I
270 270 O
Z R.S 286 265 O2 o LEOEND <<C'E o 500 YEAR FLOOD )~ uoo C77 100 YEAR FLOOD O 50 YEAR FLOOD 10 YEAR FLOOD 2'.
STREAM BEO g)
CROSS SECTION CI . LOCATION 3.40, 3.60 3.80 i.00 4.20 8AO STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 1DP
0 IL CJ O
CC O
Ch M
M O
290 286 0g 276 276 f
600 YEAR LOOO f
IOO YEAR LOOO 60 YEAA fLOOO 210 IO YEAR FLOOD STAEALI SEO CAOSS SECTION LOCATION 6.20 SAO 6.00 I 0.20 0.40 6.60 0.80 MO TAO MO STREAM DISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 11P
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285 rO III h.5 LEO END 500 YEAh FLOOD ~z~ Oo'+
Cll I00 YEAh FLOOD 50 YEAh FLOOD z) U-cs 286 I0 YEAR FLOOD STREAM BEO CROSS SECTION LOCATION B.q0 8.20 BAO 8.60 '80 NO 8.20 )
QAO 8.80 8.80 IBAD STREAM OLSTANCE IN THOUSANDS OF FE'ET ABOVE CONF LUFNCE WITH LAKE QNTARIO 12P
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~S 255 0z 250 I
215 246 g
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h.8 IJ 600 YEAR FLOOO 100 YEAR FLOOD u 60 YEAR FLOOD g Oo 10 YEAR FLOOO STREAM SEO CROSS SECTION W LOCATION a Q
0.20 OAO '.50 0.80 1.00 1.20 1AO IL STREAM OISTANCE IN THOUSANDS OF FEET ABOVE CONFLUENCE WITH LAKE ONTARIO 13P
Vl CS UJ 276 276 LJJ 2C tl K
210 0z 266 5
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o I
0
~~ 6OoD LEGEND 600 YEAR FLOOD H I00 YEAR FLOOD 50 YEAR FLOOD lD YEAR FLOOD STREAM BED 0
CROSS SECTION LOCATION O III IL ~
2.00 c 2.20 2AO 2.60 STREAM DISTANCE IN THOUSANDS OF F SET ABOVE CONFLUENCE WITH LAKE ONTARIO
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COMMUNITY-PANEL NUMBER bo FB Lake ctbu~ ')
Tributary No. i Lokeuiew Creek
--liLT i CONRAIL.
0 360663 0005 B RPI>>
co.--,-
Qi Qtoa L
In 0 0 0 2 al N
(Black Creek Tributary No. 8 i
0 0
0 c b'bi td Vn Black Creek POND Tri b u torY OAO No. 9 yt THIS AREA OF THE COMMUNITY 0 IS SHOWN AS INSET A 0 ON PANEL 360663 0005 8 Qlb 360663 0010 8 n
Fuddy Pood Trit utan )
0
',Z. P ~POND CROOLLB PADDY, PO NDvi a~ax Deer Rldee Creek Tr butary NATIONAL FLOOD INSURANCE PROGR Paddy Creek V FIRM FLOOD INSURANCE RATE MA TOWN OF SCRIBA, NEW YORK OSWEGO COUNTY PRC MAP INDEX P HINTED I:R TUBE PANELS PRINTED. 5, 10
,JUFI 3 089
~ARD PROOF SEPT 16, 1982 TIEYYBERRY G DAVIS .9ocketOESQ. !
COMMUNITY-PANEL NUMBERS tl~ 360663 0001-0010 g/~of
+'oofrclWUC'If~o Ome Oocilmeiih R."O'ULATORY ROCKET FILE EFFECTIVE DATE:
federal emergency management agency federal insurance administration
KEY TO MAP THE CORPORATE LIMITS HAVE BEEN 500-Year Flood Boundary SHOWN OFFSHORE FOR CLARITY. 100-Year Flood Boundary COINCIDE WITH THE SHORELINE.'O RPO'R(kTE THE ACTUAL CORPORATE LIMITS Zone Designations*
ELEVATION REFERENCE MARKS ELEVATION REFERENCE MARKS W 100-Year Flood Boundary
'"':: ",2 E,IPJE, REFERENCE ELEVATION REFERENCE ELEVATION RM1 IN FT. INGVD) DESCRIPTION OF LOCATION ~ACC E S 500-Year Flood Boundary MARK IN FT. (NGVD) DESCRIPTION OF LOCATION MARK ROAD 324.69 Bott set in utility pole 38 on south side of Minor Road near RM2 Base Flood Elevation Line 513 RM 270.32 Southeast corner of concrete curb at the A A. Fitzpatrick RM 9 prO/A~O~
1 Nuclear Power Plant, approximately 250 feet south of Lake culvert over Lycoming Creek, located approximately 400 feet With Elevation ln Feet**
east along Minor Road from imersection of Lycoming Road.
Ontano ZON 656. ZONE A3 (EL 987)
~n ZONE C Base Flood Elevation in I-eet 306.54 Chiseled square cut in top of south head wall of CONRAIL Where Umform Within Zone**
Z ONE A RM 2 255. 43 Chiseled square cut in northwest corner of dock of Private RM 10 Road bridge over Lycommg Creek, located approximately bndge over Cliff Road Creek, located approximately 2600 c+
feet west along CONRAIL from intersection of Lake View Elevation Reference Mark RM7>(
1900 feet north along Private Road from East Lake Road J LACCESS R~QOJO 0 Road.
mterssctidn, m ONE ra 'e Zone 0 Boundary 263.93 Nail set at intersection of CONRAIL and Pnvste Road; 22 ~io RM 3 272.11 Chiseled square cut in tap of north head wall of East Lake RM 11 located approximately 1900 feet northwest along Private River Mile ~ M1.5 Rr)ad bridge over Lycommg Creek, located approximately Road from intersection of North Road 700 feet west along East jake Road from Nine Mile Point Road intersection. *NReterenced to the National Geodetic Vertiral Datunl of 1929 RM 12 321.91 Chiseled square cut in top of south head wall of Middle Road culvert over Walker Creek. located approximately 1600 feet )0 ~
~ZONE RM4 252.07 Chiseled square cut in top of southeast corner of south head west along Middle Road from intersection of Creamery Road. *EXPLANATIONOF ZONE DESIGNATIONS wall of Private Road culvert over Lakewew Creek, located approximatety 1400 feet northwest along La'ke View Road (I A3'~ho RM 13 354. 54 Bolt set in utility pole N.M 125 on north side of State Route 0 from intersection of East Lake Road 104 culvert over Walker Creek, located approxunstety 22 2~5 266 ZONE EXPLANATION ZONE C Chiseled square cut in top of east head wall of Parkhurst 450 feet east along State Route 104 from the mtersection of 0 6 A,ST 0 RM5 274.67 Road culvert over Lycoming Creek, located approximately 1850 feet south along Parkhurst Road from intersection Creamery Road D 0 -PBJVAT s Areas of 100-year flood; base flood elevations and flood hazard factors not determined ROAD AO Areas of 100-year shallow flooding where of East Lake Road. 1 National Geodetic Vertical Datum of 1929 depth're between one (I) and three (3) feet; average depth 284.47 Chrsbled square cut in top of southeast wing wall of Lycom- of inundaaion are shown but no flood hazard factors RM 6 ZO are determined.
mg )Road bridge aver Lycoming Creek, located approxi-matrjtv 2400 feet south along Lycorning Road from inter- AH Areas of 100-year shallow t)ooding where depths section of East Lake Road. J A Fitzpatrick Nuclear Power Plant ZONE'A2: " are between one (1) and three (3) feet; base flood elevations are shown, but no flood hazard factors Bolt set in 40 inch maple tree on south side of East Lake )ADLAI n RM 7 270.75 Road near Lakewew Creek crossing, located approximately 300 feet southwest. along Cliff Road from mtersection of 1
'NE 0 A1-A30 are determined.
Areas of 100.year flood; base flood elevations and Lake View Road .Ezg,t Nay'RIVATE flood hazard factors determined, ROAD A99 Areas of 100-year flood to be protected by flood RM 8 274.04 Bolt set in 40 inch maple tree on north side of Cliff Road, protection system under construction; base flood located approximately 300 feet west along Cliff Road from ZONE. elevations 2nd flood hazard factors not determined.
intersection of East Lake Road. Lakeview Creek Areas between limits af the 100-year flood and 500-ONE C year flood; or certain areas subject to 100-year flood-HALL'IG AO I National Geodetic Vertical Datum of 1929 ZONE C ZONE B ing with average depths less than one (1) foot or where
' the contributing drainage area is less than one square ZONE A1 ZONE C mile; or areas protected by levees from the base flood.
'B O RM6 (Medium shading)
C Areas of minimal flooding. (No'shading)
'. LIMITOF DETAILED STUDY ZONE, ZON C ',p+. D Areas of undetermined, but possibte, flood hazards.
ONE C ZONE INSET A
.'ZONE 8 ZONE A1 (EL 249)
C ZONE A26 Y A5 V Areas of 100-year roastal flood with velocity (wave action); base flood elevations and flood hazard factors 0 254 zl not determined.
1249 Oy t.r ZONE. B V1-V30 of 100-year coastal flood with velocity (wave
'reas z!
QO action); base flood elevations and flood hazard factors ONE +f determined.
..A2 0'7
' +
'ZONE, 9 9, NOTES TO USER g
k(t(TS ZONE C Certain areas not in the special flood hazard areas (zones A and V}
NE C B may be protected by flood control structures.
ONE A1 This map is for flood insurance purposes only; it does not neces-ZONE Ai' up arily show zlt areas subject to ftooding in the community or CO pll plznimetric features outside special flood hazard areas.
266 )~~nhtLER
~
PARK ROAD m, PRIVATE 0 'PRM 9RIVATE For adjoining map panels, see separately printed Index To Map ROAD wo 27 1 ws 27 ROAD 2/O7NE A' Panels.
0 CLIFF 0 RQAD,. ZON rF,y A"'OIIIE.A1 F 00 T 6 Ei I 0 G E ZONE C ZONE A2 ~Ebb (EL 249)
/
/ INITIALIDENTIFICATION:
/ ZONE B 3(S FLOOD HAZARD BOUNDARY MAP 324 M IN42 R RRDAO~
REVISIONS'LOOD MINOR ~RO D 929
,/ZONE IMIT OF DETAILED STUDY 2 THE CORPORATE LIMITS HAVE BEEN SHOWN OFFSHORE FOR CLARITY.
THE ACTUAL CORPORATE LIMITS
/ B Wg/
X RO/O INSURANCE RATE MAP EFFECTIV Est COINCIDE WITH THE SHORELINE. p ZONE C ZO E B 2)g I LOOD INSURANE 5 Rhl I MAP RFVISIONS ZONE A2 ZONE A2 ~N ppp LIMIT OF DETAILED STUDY ZON RM10 0
/ 0
/
/ ONE B, ZONE A1 (EL249l ..',
9 o
g.
ZONE C PU}
Refer to the FLOOD INSURANCE RATE IVIAP EFFECTIVE date Qi shown on this map to determine when actuarial rates apply to structures in Ihe zones where clevations or depths have been estab lished, RO AO To determine if flood insurance is available in this community, Qi NO RTH contact your insurance agent, or cail the National Flood insurance ZONE A1 4 ~
qc Program, at (800) 638 6620 (Et. 249) ZONE C wr ZONE Z NEA1, ZONE C APPROXIMATE SCALE Qrr. 1000 0 1000 FEET p
it-CO NATIONAL FLOOD INSURANCE PNOUNANI 0@
FIRN ROAD FLOOO INSURANCE RATE INAP LIMITOF j RM. MIDDLE DETAILED STUDY +12 3 4 ROAD MIDDLE ZONE A4 9 N. s ZONE B ZONE B TOWN OF SCRIBA,,
ZONE A5 .. 'Ew ZONE B '21 ra ZONE B NR%'YQRK
~ee4 ZONE C Walker Creek OSWEGO COUNTY 330
~3" ZONE C ZONE C PANEL 6 OF 10 (sEENMAI INDEx FoR PANEL6 a)DT PRINTED)
ZONE A2 p. ZONEIl B
'ZONE B
Qap ZONE C PROOF SEPT 161 1982 P Rl VATE3(i ZONE A2 0 TBAIOGE PRg
>06 I CCI(lTCI 0 OIUCCgmg+
1Vl, 355 LIMITOF DETAILED STUDY Cg R o U-16-', UUCNEI PILE CDNIIIUIIITY-PAIIEI.IIIUNBER UEUU$1 360663 0005 l3
'FFECTIVE DATE:
I'/
Federal Emergency Management Agency, DEWBERRY & Cc E FRAME.
KEY TO MAP I,
'ih '"ZOFEE 8 0 Year Flood Boundary
'00 I
)m 2
Zone Desiznationse With 8--UxZTE RN/dz Date of Identification e.g., 12/2/74 OSIIVE ZONE B 100 Year Flood Boundary ROAD n .Ptarv 500-Year Flood Boundary RM14 Z//w
/oR-:-"
UE 0 0 Base Flood Elevation Line 513~
31 With Elevation In Feetee PRIvATE, 007 Base Flood Elevation in Feet (EL 987)
ORZ/
ljrn 3x ZONE B Where Uniform Withm Zoneve OI m Elevauon Reference Mark RM7 x
~ M1.5 ZONE B River Agile
'ilo ZONE C ee Referenced to the National Geodetic Vertical Datum of 1929 g/
"EXPLANATIONOF ZONE DESIGNATIONS
/. ZONE EXPLANATION 0 base flood eievations and Areas of 100-yea( flood; Q flood hiltard factors not determined 0 PRIVATE ROAD Q AO Areas of 100-year shallow flooding where depths ZONE are between one (I) and three {3) feet; average depths 00 . RO x/i of inundation are shown, but no flood hazard factor.
40 ZONE B 0
0 are determined.
9' 4A ~niVA~E AH Areas of 100-year shallow flooding where depths ZOI xgare between one (I) and three (3) feet; base flood PRIVATE DRIVE l 40//
ZONE C elevations are shown, but no flood hazard factors are determined.
ou38 ZONE A1 AI-A30 Areas of 100 year flood. base flood elevations flood hazard factors determined, A99 Areas of 100.year flood to be protected by flood ZONE C protection system under construction; base flood elevations and flood hazard factors not determined I 14 Areas between limits of the I'00-year flood and 500.
+. year flood; or certain areas subject to 100-year flood-ZONE B ing with average depths less than one (I ) foot or where
@74 the contributing drainage area is less than one square mile; or areas protected by levees from the base flood.
(Medium shading) i',
r L'.-
'LZPNNI'a 0 Areas of minimal flooding. (No shading)
ZONE D Areas of undetermined, but possible, flood hazavc .
V Areas of 100-year coastal flood with velocity (wave action); base flood elevations and flood hazard factors not determined.
LIMITOF DETAILED STUDY,, '0 VI-V30 Areas of 100-year coastal flood with velocity factors (trave OI/
um action); base flood elevations and flood hazard m determined.
'l NOTE5 TO USER p~'
I' tk A ai d V)
>ic Certain areas not in Ihe special liood irarard as (zoI s ic may bc protected by flood control structures.
This map is for flood insuran, purposes only; it does nor neces-040 sarily show all areas. subicrs to ilomling rn Ihe community or Q4 all planimetric feaiurgzdutsidc special flood ha ard areas ONtE A"', For adloining rnaP I>anclsf % vcl,trulcly d Index tri MaP Ui/
Cr "ZONE Panels.
z 0 CONNER 0 p/ 0 Ui 2
I
)W ZONE I...RIUATE A h,s z
z' m
z' INITIALIDENTIFICATION:
PRIVATE l,R-u" 0 FLOOD HAZARD BOUNDARY MAP REVISIONS i
Ro 0 R IVF. 10 Z
,I Ro 0 m
/
,0cl Z rn
') '0 m ZONE A 0: FLOOD INSURANCE RATE MAP EFFECTIVE 0
2 Ft ODD INSURANCE RATE MAP REVISioNS; Z
m I
ct I ln ZONE A 00 0
ROAD tc ROAD WHIT T EMORE ,/
',0
'iO tvl ROA ZONE A4 ZONE A ZONE C XRM '16 2,
. 04 H
ITG ZONE A Il
',0 Refer to the FJ DOD INSURANCE RATE MAP EFFECTIVE C date shown on this map to determine when actuarial rates apply to ZONE C ZONE A Ã structures in the'ones where elevations or depths have been established.
P,I y..Oq,v To determine if flood insurance is available In this community, PRIVATE ROAD contact your insurance agent, or call the National Flood Insurance
%~""-. "l. 0 ZONE A Program at (600) 6364I620.
'291 x RM17 R Od RPO ZONE C 0,'ONE RO AO ZONE C vti r' 0 Oi vy 2 I I
(c'BI I'"
ZONE C
- ZONE A xh 0 APPROXIMATE SCALE r 1000 0 00 FEEI 404
@oi 4,$ .
ZONE B ROAO
'IS 7 I PRIVATE 1 74) DZ Ir RIDGE DRIVE F ROI PO To ROAD NATIONAL FLOOD INSURANCE PROGRAM DEER Rior ZONE B ra As Cree/
',,ZONE A4 ZONEI A ZONE C ZONE AL ZONE C Deer Ridge 'A .
io Creek Tn/nrrary ZONE A IIP Ilo FI.OOD INSURANCE RATE MAP Z '9o L I M ITS ZONE 0 CORPORATE ZONE
'2 A. ;fz 'eg ZONE A ZONE B TOWN OF RM18 ZONE B ZONE C 8CRIBA, I;
NEW YORK L OSWEGO COUNTY COF(PORATE 298 PANEL 10 OF 10 ELEVATION REFERENCE MARKS '(SEE MAP INDEX FOR PANELS NOI PRINTED)
ELEVATION REFERENCE MARK IN FT, (NGVD)
Bait set pole N.M 'I DESCRIPTION OF LOCATION on Belch Dove, Ir cated approx mately 450 feet east along Belch Dnv intersection of City Lme Road. PRC PROOF RM 14 337.74 m u RM 15 342.99 Bolt set m utdrtv pole 51 on north srde of Hail Roasat la/me Cr Iocaied approximately 3300 feet e; .t along Hail Road from ntr rsecuo t of City Line Roar of Qld itate Route 57 XPERTU~F-SEPT 161 1982 west end of wirldovvsi ut north of Paqe Mernonai Chapel, located ast sr t C~IID 1935, set m s RM 16 370.73 Standard USLS disk, stamped OS 7 I sole 6050 on west side of ()Id State RouteI 67, iorated approximately 1500 feet north along Old State Routq 57 from miersection of Deer RM 17 309.74 PK nail set n utn Rrdge Road d State Route 57 from mtersectron of D ter RM 16 305.30 PK nail set in R dge Road.
uulrty pole 156 on rest side of I I State Route 57, h ied approximaieiy 2'I00 feet south along 0 0-""
~o~ mOO%
CDMMUItITY PANEL NUMBER 1.,
Ner o ouetic Vertical Datum of 1929 TIooV if'~ AT)oO 360663 0010 B fttQL
~11 oeo 1OO1DO<
EFFECTIVE DATE: