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Agua Fria River below New Waddell Dam Reach location: Latitude 33050'03", longitude 112016'33". The reach begins about 3,000 ft below New Waddell Dam. 1,459 mi2, Draina!!e area: Bed-material size: d50 = 82 mm (0.27 ft), Channel descrintion: The channel generally is straight throughout the reach. The reach narrows considerably from cross-sections 1 to 4. A small ridge is along the middle of the reach with poorly defined low-flow channels on either side. Outcroppings of bedrock are near the left bank of cross-sections 3 and 4. Saltcedar ranges in height from about 5-10 ft in the reach and grows mostly along the middle ridge, The channel bed consists mainly of small, to medium, sized cobbles. The stream was perennial before construction of Waddell Dam, Following the recorded flow, the saltcedar appeared to be little affected by the flow, A small nonconveying area is at the right bank of cross,section 4 (investigation of the debris deposited by the flow indicated a zone of separation and a backwater area) that was not included in the verification computations. Table 5. Flow data and computed roughness coefficient, Agua Fria River below New Waddell Dam Remarks: Date of flow Discharge, in cubic feet per second Roughness coefficient Rated 02-09-93 9,000 0,042 Fair Table 6. Average'reach properties, Agua Fria River below New Waddell Dam Date Area, in square Top width, feet in feet Hydraulic radius, in feet Mean velocity, in feet per second Froude Total length, Total fall, Water-surface number in feet in feet slope 02-09-93 1.978 418 4,78 4,6 0.37 447 Ll1 0,0025 40 35 >- w w "- 30 ~ Z 0 ~ 25 w -' w 20 o 50 100 150 200 250 300 350 400 450 500 STATIONING FROM LEFT BANK, IN FEET Figure 6A. Cross,section 2, Agua Fria River below New Waddell Dam. Agua Fria River below New Waddell Dam 23