Accession Number:

ADA088781

Title:

National Dam Safety Program. Smith Reservoir Dam. NDI Number PA-00017. PennDER Number 25-28. Lake Erie Basin. West Branch of Sixteen Mile Creek, Erie County, Pennsylvania. Phase I Inspection Report,

Descriptive Note:

Corporate Author:

BAKER (MICHAEL) JR INC BEAVER PA

Personal Author(s):

Report Date:

1980-07-01

Pagination or Media Count:

77.0

Abstract:

Smith Reservoir Dam was originally designed 1924 as a 35 foot high earth dam with an emergency spillway excavated in shale in the right abutment. In 1935, the spillway channel was excavated one foot lower and a 2 foot high concrete weir was added to the spillway crest. At the same time the embankment was raised 3 feet. The dam was built for water supply, for which it is still used today. The outlet works consist of two 12 inch cast-iron pipes through the embankment. A valve house is located on the downstream side of the embankment. Both 12 inch pipes can function as blow-offs or supply water into a 24 inch steel pipe leading to the water treatment plant downstream. Hydraulichydrologic evaluations revealed that the spillway will pass the 100-year flood without overtopping the dam. A spillway design flood SDF in the range of the 100-year flood to the 12 Probable Maximum Flood 12 PMF is required for Smith Reservoir Dam. The 100-year flood was chosen because the dam is on the low side of the Small size category according to storage capacity. The spillway is therefore considered adequate. The inspection and review of information revealed certain items of work which should be performed immediately by the owner.

Subject Categories:

  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE