National Program for Inspection of Non-Federal Dams. Harlow Brook Number 1 Dam (MA 00032), Wareham River Basin, Wareham, Massachusetts.
Abstract
Harlow Brook Dam No. 1 is a 200-foot long, 12-foot high earthfill dam built in 1910. The crest of the dam is used as a roadway to a picnic area on the west side of the reservoir. Discharge from the dam is through a 5.1-foot wide by 10-foot high arched concrete conduit. Flow through the conduit is controlled by manually removed stoplogs with the top at elevation (E1) 45.9. Discharge from the conduit is directly into the reservoir of Harlow Brook No. 2. Generally, the dam is in poor condition. The following are visible signs of distress which indicate a potential hazard at the site: seepage at the dam, spalling and undermining of the walls in the discharge conduit, missing riprap on the downstream face of the dam, erosion of the downstream slopes and accumulation of debris in the discharge channel. Hydraulic analyses indicate that the conduit with stoplogs in place can discharge a flow of 75 cfs with the water surface at El 49.5, which is the average low point on the crest of the dam. Therefore, an outflow test flood (estimated as one-fourth of the PMF) of 265 cfs will overtop the dam to El 50.1. The conduit stoplogs can discharge 28 percent of the test flood before the dam is overtopped.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1979
- Accession Number
- ADA145309
Entities
Organizations
- New England District, U.S. Army Corps of Engineers