National Program For Inspection Of Non Federal Dams Campton Pond Dam Nh 00130 Merrimack River Basin Campton New Hampshire Phase I Inspetion Report

The dam is composed of three main sections including an earth dike with stone masonry retaining wall, a concrete dike section and a solid concrete spillway section. It is small in size with a significant hazard classification. The dam was found to be in fair condition based on a limited spillway capacity of only 52 percent of the test flood. (Author).

The dam is an earthfill embankment dam about 400 ft. long and 56 ft. high. The overall condition of the dam is considered fair because the embankment has exhibited settlement since its rebuilding in 1974, as well as erosion, seepage and leakage. The most important investigation is the assembly of documentation for the design of the dam. (Author).

Chase Pond Dam is a rock filled log crib with timber planking overflow structure between stone and concrete embankments. The overall length of the dam is 103 ft. The timber overflow section is approximately 12 ft. high by 50.5 ft. long and 10 ft. wide at the crest. The embankments, which are approximately 5.4 feet higher than the crest of the timber overflow section, are composed of masonry and concrete on the upstream and training wall faces. As a result of the visual inspection of this facility, the dam is considered to be in poor condition. The dam is small in size with a significant hazard classification. The dam at the outlet from Tannery Pond could be overtopped or breached. Keywords include: Inspection, Dam safety, Merrimack River Basin, Wilmot, New Hampshire, and Chase Pond.

Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

The dam is a 450 ft. long, 35 ft. high earthfill dam with cemented rubble stone masonry core walls. The dam is intermediate in size with a significant hazard potential. The test flood is taken as 1/2 of the PMF. Generally the dam is in fair condition. (Author).

Mountain Pond Dam is located on the north end of Mountain Pond in Sanbornton, N.H., in mountainous terrain two miles south of the village of New Hampton. The dam is an earth embankment, 97 feet long and 14 feet high with a gated 8-inch outlet. The impoundment stores the water supply for the Town of New Hampton and is also the fire protection reserve. It is small in size with a low hazard potential. The test flood is in the range of a 50 to 100 year frequency. The condition of the dam is considered to be fair, requiring that modifications be made by the owner within 1-2 years after receipt of this inspection report. Keywords include: Inspection, Dam safety, Merrimack River Basin, Sanbornton, New Hampshire, and Tributary of Pemigewasset River.

The dam consists of a 260 ft. long granite-faced earth dam with spillway, flume, and outlet culvert consisting of granite masonry and concrete. It is small in size with a significant hazard potential classification. It is in fair condition. Although there is no immediate concern, features revealed by this inspection do require attention. A formal sequenced operation plan for emergencies involving upstream and downstream dam operations should be developed and submitted to the NHWRB for review and comment.

Berry Pond Dam is an earth embankment 185 feet long and 12 feet high, with a stop-logged spillway, 11 feet wide and 7 feet high. The dam was superimposed in 1967 upon an earlier rock crib dam built in 1884. Three pipes penetrate the dam, two of which are abandoned. The operative pipe, a gated 8 in. line, regulates flow through a man-made channel to a downstream water supply reservoir for the Town of Pittsfield. It is small in size with a low hazard classification. The dam's condition is rated as fair but deficiencies were found in freeboard, in emergency discharge provisions, and in draw-down capability. Keywords include: Inspection, Dam safety, Merrimack River Basin, Pittsfield, New Hampshire, and Tributary to Suncook River.

The Souhegan River Watershed Dam No. 26 is located on Blood Brook, a tributary of the Souhegan River, approximately 2 miles upstream of West Wilton, New Hampshire. The dam is an earth embankment 692 feet long and 79 feet high with a drop inlet service spillway structure and a 30 inch outlet conduit. An emergency spillway 320 feet wide is cut into the left abutment.