National Program for Inspection of Non-Federal Dams. McTaggarts Pond Dam (MA 00879), Nashua River Basin, Fitchburg, Massachusetts. Phase I Inspection Report.
Abstract
The impounding facility at McTaggarts Pond is a 458-foot long, 23 foot high stone-earthfill structure with upstream and downstream concrete retaining walls. The spillway which is a 158 foot long ungated broad crested weir has a crest at elevation (El) 636.0. The outlet structure, located adjacent to the spillway includes a discharge pipe to a mill downstream and a low level outlet. The following deficiencies were observed at the dam: Seepage at the toe of the downstream retaining wall; seepage through the joints in the concrete on the spillway side walls; bulging of a downstream retaining wall; displaced riprap and brush growing through the riprap; erosion on the top of the right (west) embankment section; and rubble, boulders and debris in the downstream channel. Hydraulic analyses indicate that the spillway can discharge 6,910 cfs at El 641.6 which is the low point on the top of the dam. The spillway cna discharge 86 percent of the test flood before the dam is overtopped.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA155702
Entities
Organizations
- New England District, U.S. Army Corps of Engineers