National Program for Inspection of Non-Federal Dams. Webster Brook Dam (ME 00229), Saint John River Basin, Limestone, Maine. Phase I Inspection Report.
Abstract
Webster Brook Dam is an earth fill embankment 1050 feet long and 66 feet high. A reinforced concrete drop inlet principal spillway leads to a 30 inch diameter reinforced concrete conduit under the dam that ends in a reinforced concrete impact basin. A grass lined earth cut emergency spillway is provided at the left abutment. The embankment dam, principal spillway drop inlet, principal spillway impact basin and emergency spillway were found in good condition. In the embankment itself, there were no dips, sags or other evidence of distress. The reinforced concrete structures were sound with no evidence of deterioration. The grass cover on the downstream embankment, crest and emergency spillway were well developed. The grass cover on the upstream face was very sparse. Stagnant water was observed at the toe of the downstream slope to the right of the downstream outlet structure. The test flood was the PMF. This yielded a peak inflow of 5140 cfs (1270 csm) and a routed peak outflow of 2680 cfs. The computed maximum reservoir level E1. 590.4 NGVD was below the embankment crest E1. 595 NGVD and no overtopping of the embankment would occur. The capacity of the dam is greater than 100% of the test flood.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1981
- Accession Number
- ADA155386
Entities
Organizations
- New England District, U.S. Army Corps of Engineers