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<br />obtained from a 75-acre tract of land immediately downstream of the <br />dam. This excavated area. averaging 12 feet deep. filled with water <br />and formed Lake Hasty. now used for year-round recreation. A half- <br />mile segment of the historic Santa Fe Trail north of the reservoir has <br />been enclosed by a fence and marked with an appropriate sign. <br /> <br />John Martin Dam consists of a concrete gravity structure 1,644 feet <br />long and 120 feet high. and an earthfill structure 2.600 feet long. The <br />concrete gravity structure contains a spillway controlled by sixteen 30 <br />foot by 64 foot tainter gates and their operating machinery. There are <br />earthen wing dams on either side of the main dam. The north wing <br />dam is 3.880 feet long. connecting to the earth fill structure of the main <br />dam at the north abutment. The south wing dam is 5.807 feet long and <br />connects to the south end of the concrete structure of the main dam. <br />A bituminous-surfaced roadway, 21 feet wide. extends along the crest <br />of the north wing dam. main dam. and south wing dam. The overall <br />length of the structure is 2.6 miles. Detailed project data is shown <br />below. <br /> <br />, <br />. , <br /> <br />DAM <br />Total length. feet ........................................................13.945 <br />Maximum height above streambed. feet .............................118 <br />Width of roadway on dam. feet ..........................................21 <br /> <br />SPILLWAY <br />Total length. including piers. feet ....................................1.174 <br />Crest gates. 30' x 64' ........................................................16 <br />Discharge capacity. cubic feet per second ................... 639.200 <br /> <br />OUTLET WORKS <br />Sluicing conduits. 6' x 7.5' ..................................................4 <br />Regulating conduits, 4' x 4..................................................2 <br /> <br />.. <br />I <br />I <br />I <br /> <br />RESERVOIR <br />Capacity. acre-feet at elevation 3.870.00 ....................608,245 <br />Flood control storage. acre-feet ..................................259.562 <br />Conservation (irrigation) and recreation storage. acre-feet <br />below elevation 3,851.87 .........................348,683 <br />Water surface at spillway crest. acres .............................8.975 <br />Water surface at top of conservation pool. acres .............11,645 <br />Water surface at top of flood control pool, acres .............17.151 <br />Drainage areas. square miles .........................................18.915 <br /> <br />9 <br /> <br />ARCAl111 <br />