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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 />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 earthfill 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 />DAM <br />Total length, feet ............................... .........................13,945 <br />Maximum height above streambed, feet . ............................118 <br />Width of roadway on dam, feet ........... ............................... 21 <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 />OUTLET WORKS <br />Sluicing conduits, 6' x 7. 5 ..................... ..............................4 <br />Regulating conduits, 4' x 4 ................... ............................... 2 <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 />9 ARCA 1989 <br />