Following are lists of the reservoirs and local protection works which were proposed for construction in the modified comprehensive plan: 1 Includes highway, railroad, and utility relocations. For details, see individual reports. Alternate site to be selected. Cost has not been revised on current price basis. 31. UNION VILLAGE RESERVOIR, CONNECTICUT RIVER BASIN, VT. Location. The dam is located on the Ompompanoosuc River, four miles above its junction with the Connecticut River. It is 1/4 mile north of Union Village, Vt., and 11 miles north of White River Junction, Vt. (See U. S. Geological Survey maps for Strafford, Vt., and Mt. Cube, N. H.-Vt.) Existing project. The dam is of the rolled-earth type with a dumped rock shell. It has a top length of 1,100 feet, a top width of 30 feet, and a maximum height of 170 ft. The spillway is approximately 350 feet from the right end of the dam and is of the chute type with a low, curved, 400-foot long, concrete weir. The approach channel and discharge chute are 1,000 and 1,130 feet long, respectively. The outlet works are in the right abutment and consist of a 1,236-foot long, 13-foot diameter tunnel through rock. Control of the outlet works is accomplished by two 7-foot 6-inch by 12-foot broome gates mechanically operated through a shaft from a gatehouse above. The reservoir is operated for flood control purposes and has a storage capacity of 38,000 acre-feet, which is equivalent to 5.7 inches of runoff from its drainage area of 126 square miles. The estimate of cost for new work (1955) is $3,098,000 for construction and $905,000 for lands and damages, a total of $4,003,000. The latest (1952) approved estimate for annual cost of operation and maintenance is $19,000. Tho project is a unit of the comprehensive plan for flood control and other purposes in the Connecticut River Basin which was authorized by the Flood Control Acts approved June 22, 1936, as amended, and June 28, 1938. (H. Doc. 455, 75th Cong., 2d sess.) Local cooperation. Section 2 of the Flood Control Act approved June 28, 1938, applies. Operations and results during fiscal year. New work: Operations consisted of continuation of reservoir clearing and grading of slopes. Costs from regular funds were $5,061. Maintenance: Operations consisted of periodic checking of gates and operating equipment and general maintenance of roads, buildings, and grounds. Costs from regular funds were $14,979. Reservoir operation: The reservoir was regulated for two minor rises on the Ompomponoosuc and Connecticut Rivers during the past year. Storage utilized from the first regulation following a storm in September 1954 was insignificant. The second, caused by rainfall and snow melt during April 1955, resulted in a rise of 64 feet in reservoir stage. Storage utilized was 4,000 acre-feet, or 11 percent, of the total reservoir capacity. Total costs during the fiscal year from regular funds were $20,040. Condition at end of fiscal year. Construction of the dam was initiated in March 1947 and completed in June 1950. Work remaining to be done consists of disposition of condemnation cases in connection with land acquisition and payment for relocation of telephone line. Total costs from regular funds were $4,069,537, of which $3,989,215 were for new work and $80,322 for maintenance. Other new work data: Unobligated balance, fiscal year ending June 30, 1955 $13, 074 32. SURRY MOUNTAIN RESERVOIR, CONNECTICUT RIVER BASIN, N. H. Location. The dam is located on the Ashuelot River, 34.6 miles above its junction with the Connecticut River and 5 miles north of Keene, N. H. (See U. S. Geological Survey maps for Keene and Bellows Falls, N. H.-Vt.) Existing project. The dam is of the rolled-earth type with a dumped rock shell and a downstream rock toe. It has a top length of 1,670 feet, a top width of 30 feet, and a height of 86 feet above river bed. The spillway is located at the right end of the dam and is of the open side channel type with a low concrete weir 338 feet in length. The spillway discharge channel is in rock cut and is 2,000 feet in length. The outlet works, in the right abutment, consist of a 748-foot long intake channel and a 10-foot diameter, horseshoeshaped tunnel through rock. The tunnel is 383 feet in length and discharges into the spillway channel. Control of the outlet works is accomplished by two 4-foot 6-inch by 10-foot broome gates mechanically operated through a shaft from a gatehouse above. The reservoir is operated for flood control purposes and has a storage capacity of 32,500 acre-feet which is equivalent to 6.1 inches of runoff from its drainage area of 100 square miles. The cost of new work for the completed project was $1,407,200 for construction and $324,100 for lands and damages, a total of $1,731,300. The latest (1955) approved estimate for annual cost of operation and maintenance is $18,000. The project is a unit of the comprehensive plan for flood control and other purposes in the Connecticut River Basin which was authorized by the Flood Control Acts approved June 22, 1936, as amended, and June 28, 1938. (H. Doc. 455, 75th Cong., 2d sess.) Local cooperation. Section 2 of the Flood Control Act approved June 28, 1938, applies. Operations and results during fiscal year. New work: None. Maintenance: Operations consisted of periodic checking of gates and operating equipment and general maintenance of roads, buildings and grounds. Total costs from regular funds were $13,538, all maintenance funds. Reservoir operation: The reservoir was regulated to reduce flows on the Ashuelot River during two periods. In September, 2,400 acrefeet, or 7 percent of the total storage was utilized. The computed peak inflow was 1,700 c. f. s. The outlet gates were closed during the flood period. The maximum regulated outflow to empty the reservoir was 700 c. f. s. In April, 3,100 acre-feet, or 10 percent of the total storage capacity, was utilized. The computed peak inflow was 1,200 acre-feet. The outlet gates were closed during the flood period. The maximum regulated outflow to empty the reservoir was 820 c. f. s. Condition at end of fiscal year. The project is complete. Construction of the dam and appurtenant works was initiated in August 1939, and completed in June 1942. Total costs for the project have been $1,946,261, of which $1,731,319 was for new work and $214,942 was for maintenance. 33. OTTER BROOK RESERVOIR, CONNECTICUT RIVER BASIN, N. H. Location. The site of the proposed Otter Brook Dam is on Otter Brook, 2.4 miles upstream from its junction with The Branch, which flows 2.5 miles to the Ashuelot River at Keene. (See U. S. Geological Survey Maps-Keene, N. H.-Vt., and Monadnock, N. H.) Existing project. The project provides for the construction of a 1,288-foot long rolled earthfill dam with a maximum height of 133 feet and a reservoir with a flood control storage capacity of 17,600 acre-feet. The drainage area controlled is 47 square miles. The reservoir will be operated as a unit of a coordinated system of reservoirs for the control of floods in the Connecticut River Basin. The estimate of cost for new work (1955) is $4,000,000 for construction and $800,000 for lands and damages, including highway relocation, a total of $4,800,000 for new work. The latest (1955) estimate for annual cost of operation and maintenance is $20,000. The existing project was authorized by the Flood Control Act approved September 3, 1954, Public Law 780, 83d Congress, 2d session. Local cooperation. Section 2 of the Flood Control Act of June 28, 1938, applies. Operations and results during fiscal year. Operations consisted of engineering studies and preparation of design memoranda. Design memoranda for Hydrology and Hydraulic Analysis, Real Estate, Geology and Soils, General Design, and Embankment Design were submitted for review and approval. Costs from regular funds were $99,327. Condition at end of fiscal year. Advance engineering and design was approximately 38 percent complete. No construction work has been initiated. Work remaining to be done prior to initiation of construction is completion of design memoranda and specifications. Total costs from regular funds have been $99,327. Unobligated balance, fiscal year ending June 30, 1955-- Estimated additional amount needed to be appropriated for com- $83 160, 000 160, 083 4, 540, 000 34. BIRCH HILL RESERVOIR, CONNECTICUT RIVER BASIN, MASS. Location. The dam is located on the Millers River, 27.3 miles above its junction with the Connecticut River. It is 1.3 miles east of South Royalston, Mass., and 71⁄2 miles northwest of the city of Gardner, Mass. (See U. S. Geological Survey maps for Royalston and Winchendon, Mass.-N. H., and Templeton, Mass.) Existing project. The dam is of the rolled-earth type with a dumped rock shell. It has a top length of 1,400 feet, a top width of 25 feet, and a height of 56 feet above river bed. The spillway consists of three concrete weirs located in two natural saddles and an abandoned railroad cut northwest of the dam. The main weirs have a crest length of 720 feet and 350 feet, respectively, and the weir in the railroad cut has a crest length of 23 feet. The outlet works are located on rock at the right end of the dam and consist of an intake channel 1,500 feet in length, a gate structure with a gatehouse directly above, and an outlet channel 1,150 feet in length. Control of the outlet works is accomplished by four 6-foot by 12-foot roller gates mechanically operated from the gatehouse above. The reservoir is operated for flood control purposes and has a storage capacity of 49,900 acrefeet which is equivalent to 5.3 inches of runoff from its drainage area of 175 square miles. The estimate of cost for new work (1955) is $1,091,000 for construction and $3,076,000 for lands and damages, a total of $4,167,000. The latest (1955) approved estimate for annual cost of operation and maintenance is $16,000. The project is a unit of the comprehensive plan for flood control and other purposes in the Connecticut River Basin which was authorized by the Flood Control Acts approved June 22, 1936, as amended, and June 28, 1938. (H. Doc. 455, 75th Cong., 2d sess.) Local cooperation. Section 2 of the Flood Control Act approved June 28, 1938, applies. Operations and results during fiscal year. New work: Operations consisted of award of contract and initiation of construction for safety features. Costs from regular funds were $54. |