National Program for Inspection of Non-Federal Dams. Notown Reservoir Dam and Dike; Dam (00870), Dike (01240, Merrimack River Basin, Leominster, Massachusetts. Phase I Inspection Report.
Abstract
The main dam is 600 feet long with a hydraulic height of 21 feet. It contains a sheet piling and concrete upstream cutoff. The dike is 750 feet long with a hydraulic height of 13 feet height. The spillway's capacity with a 8-inch flashboards in place, is about 1,850 cfs or 37 percent of test flood outflow, at the top of dam. With the flashboards in place, the test flood outflow, 5,070 cfs, surcharges the reservior to elevation 741.5. The dam and dike and a small section of Route 2 are overtopped by 0.9 feet. Based on the visual inspection, the dam was in generally fair condition. However, due to the dense vegetation on the downstream slope, apparent seepage in this area could not be adequately inspected. This combined with apparent settlement along the upstream slope and the probable presence of root systems within the embankment give overall rating of the dam as poor. The dike was found to be in generally good condition.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1980
- Accession Number
- ADA155640
Entities
Organizations
- New England District, U.S. Army Corps of Engineers