ML19256D119
| ML19256D119 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/03/1967 |
| From: | Waterfield R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Newell J US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7910170578 | |
| Download: ML19256D119 (3) | |
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?00R OR GINAL
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John F. Bowell, Chief f
Environmental & Radiation Safety Tech. Br., II:L ncy 3 1967 Bobert L. Waterfield Environmental & MmAfation Safety Tech. Br., BEL MEETDIG5 WITE ME!BOICLITAN EDISON RE TERIE MII2 ISLARD - DOCIET $0 289 EutarstmaL:RIN ET-229 The first of two meetings was held with the ML staff in Room 107, Bethesda, on october 17 The socced mething was held with both the DEL staff and the ACRS shittee present at Eershey, Plannsylvania, on October 19 At both meetings the at*==d=== incluess the writer, as well as Eric Meyer of the Mediongdrology Branch, DNS, and Mr. Richres McIanors of Gibbs and Eill, one of the applianat's consultants.
Mr. Meyer 'inde some opening ecuments as the 17th to the effect that he halieved that the channel seastriction 'aelos Comevego rapids (just beloe the York Eaven Dem) probably was the contrciling alament in the river stage pro-file in this area. Es het been to the Corps of Engineer's office in Enitimore to get detailma data en high water marks which were recorded in the 1936'Zlood, in which the flee in this area was apprarinately 750,000 efs.
Sinos the maximum probable flood is about 1.1 mmien afs, the data from this flood would be very helpful.
Mr. metan= e presented a description of his flood hydrogssph salculations.
These indicated that he did not start at the ehennal ecastriction because of the rough bottom between this point and the dam, an area which has not been surveyed. Instead, he began with initial water levels above the dam, assumed a variety of bottom roughness factors, and halmnead, the flows through the three channals above the dam to arrive at eensistant levels at the acr$h and of Three Mila Tanna-Es left as the impression that he had done a thorough job of analysis, aat that it matched measuzwd flood levels fairly well, even though it was obvious he had act started at the right point in the river, and that there was aces tendency to distart facts.
It was agreed that Mafmame would bring his special bottom profile survey data with him to the meeting on the 19th, alces with scue computer printouts, Mr. me,or ao.I4 revi.e these a.d e,atost. them.
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P00R BRIGINAl At the meeting on the 19th, a considsrable amount of time was spent in exploring the river by boat, inspecting York Haven Dam, and locating high water marks fromi the 1936 flood on the east bank of the riwr.
It was found that the high water mark of 295 2 feet at the mouth of the Conswego Creek at Falmouth was on a vall forming the south side of the creek channel-at a point between the road bridge and the railroad bridge.
The railroad bridge was downstream frca the water mark, and had only 3 small arches for the water to pass through. The top of these was submerged some 4 or 5 feet at the recorded water level, as was the entire bridge structure, including the level of the tracks at that time. Thus, if there was auch flow under this bridas at the time, the water mark would be above or below the level of the river, depending on the direction of flow.
Wealsolocatedanotherhighmark(apprezimately)on'arailroadbridge about a mile north of Falmouth. This one appeared to be only a foot or two above the top of the arch under the bridge, indicating the lowl was a more relish indies. tion of the true level of the river.
After the site visit, Meyer, McLenore, an4 the writer had an extensive private discussion of the situation, with no other participants.
mt-wwe stated that he had some paper from the Corps of Engineers which indiented that the maximum probable flood would produce a level of 308 7 feet at Olmstead Air Esse, a short distanse up the river frca the sits, just past another ebennel flow constristion. Es has since forwarded this to Meyer, and it proved to be part of a graph of flow versus river stage, but the source of the graph is not indiented. It appears to be deriwd frca gage readings at the air base, and we vill attempt to learn about the reliability of this gage point, whose existence is t=1rnnwn to us at this time. If this value is reliam, we might be am to estrapolate down stream to the site to determine the flood level there.
As it became apps. rent that there was no straightforward way to resolve the flood level problem, et,arme offered to raise the levee around the site fremt 307 feet to 310 feet, and indicated that he might be am to raise it two feet more at no great expense.
Although no direct statements to the effect were ande by DEL, it became appannt that if some==an=M.e degree of credibility een be established for the level derived fca Clasted, then something very near 310 feet would be neceptable at the site. Bowowr, there is still some problem about.the level at the south end of the site area.
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Frirm AEC.338 (Rev. MU u.s.aommenT mmms ess.-o na29