National Program for Inspection of Non-Federal Dams. Swan Lake Dam (CT 00328), Naugatuck River Basin, Oxford, Connecticut. Phase I Inspection Report.
Abstract
The Swan Lake Dam consists of an earth embankment with a top width of 25 feet, a maximum height of 16 feet, and an overall length of 325 feet including a 25 foot long overflow spillway located near the center of the dam. The upstream edge of the dam crest is protected by a precast concrete block wall. The outlet works located to the left of the spillway consist of a concrete intake structure which discharges through a 24-inch reinforced concrete low level outlet or blowoff pipe at the downstream toe of the dam. The dam impounds Swan Lake which is used for recreational purposes by the surrounding property owners. Based on the visual inspection, the dam is judged to be in poor condition. Features that could affect the future integrity of the dam are seepage at the downstream toe; missing mortar and voids in the downstream spillway slope; the condition of the downstream channel; the presence of trees and stumps on the downstream slope; erosion and settlement behind the upstream concrete block wall; erosion on the downstream slope; and inadequate spillway capacity. The test flood inflow of 1,042 cfs results in a test flood routed outflow of 860 cfs that would overtop the dam by 0.7 feet. The spillway capacity with water level at top of dam is about 245 cfs and is equal to 28 percent of the test flood routed outflow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA144165
Entities
Organizations
- New England District, U.S. Army Corps of Engineers