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PRS Erosion Matrix Score Assessment Date Structure Mesa Top Bench Canyon Floor Channel Topography Explanation Ground Explanation Slope Explanation Runoff Evidence Channelized Channel Description Runoff Wetland Runoff Other Terminus Explanation Runoff Explanation Structure Run-On Structure Explanation NPDES Run-On NPDES Explanation Natural Run-On Natural Run-On Explanation ESH-18 Representative BMP Prescription BMP Description Not BMPs Sediment Comments 52-002(a) 3.6 8/27/1997 YES NO NO NO Adjacent to Puye Road - north side of 52-1. Good vegetative cover. Gentle slope. NO NO NO NO NO R. Reynolds NO 52-002(b) 15.8 9/24/1997 52-118 YES NO NO NO Edge of mesa, between aluminum buildings and Canada del Buey. Thick growth inside fence. Also thick outside to canyon rim. Slopes from buildings southward. NO NO YES Some roof drainage but buildings are small. NO NO D. Mays NO Sign reads "S.T. Reg. No. LA-58 TA-52-34B". 52-004 38.6 9/24/1997 52-11 YES NO NO NO At northeast corner of parking lot south of Building 52-11. Outfall appears to be removed and paved over. 100% asphalt. YES YES Swale on south side of Building 52-11 leads to rill, leading to 18 inch CMP under new driveway. Rill caused by Storm Water, not outfall. Sediment drops before CMP. Run-off NOT from outfall which has been removed bur from Storm Water. NO NO NO D. Mays NO No storm water concern here! Outfall removed, rill caused by storm water collecting in drainage swale. C-52-001 3.6 9/24/1997 YES NO NO NO Cement pad surrounded by asphalt. NO NO NO NO NO C. McLean NO No BMPs. C-52-002 3.6 9/24/1997 YES NO NO NO Cement pad surrounded by asphalt. NO NO NO NO NO C. McLean NO No BMPs.