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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 41-002(b) 33.0 8/6/1997 NO NO YES NO NO NO NO NO YES 2-3 feet deep storm water run-off channel out along side of both PRSs / see attached drawing. R. Reynolds NO See attached drawing. 41-002(c) 33.0 8/6/1997 NO NO YES NO NO NO NO NO YES 2-3 feet deep storm water run-off channel out along side of both PRSs / see attached drawing. R. Reynolds NO See attached drawing. 41-003 15.6 9/24/1997 41-1 NO NO YES NO Site of former sump pit to east of tunnel 1 gate, replaced by retaining wall supporting HEPA filter. NO NO NO NO NO R. Reynolds NO C-41-004 52.8 8/6/1997 NO NO NO YES Catch basin for parking lot run-off.
Willow tree canopy over outfall.
YES NO Down steep creek bank leading to outfall and PRS. PRS is at edge of stream. NO NO YES R. Reynolds Improve BMPs to stabilize steep bank at PRS site leading to outfall, i.e., terraces, water rows, rock rows. NO