There is no detailed map available for TA-32
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 32-001 3.6 11/25/1997 YES NO NO NO Parking lot of county roads and grounds. North of Los Alamos Canyon. 100% asphalt cover. NO NO NO NO NO T. Lemke Straw bale check dam was installed for surface water diversion above excavation site and also placed below excavated areas. Area was reseeded and jute mat was placed on site. BMPs installed 4/30/96 (V. Hesch, 4/98). BMPs inspected: 4/30/96 (V. Hesch, 4/98) NO This PRS is currently under an asphalt parking lot. 32-002(a) 15.8 10/7/1997 YES NO NO NO North side of Los Alamos Canyon, south of county annex building, adjacent to PRS 32-003. Site of old septic tanks (removed). Sparse vegetation. Area primarily covered with wood chips. NO NO YES Run-on from asphalt behind county annex building is causing some rill on-site. Erosion contained on-site. NO NO T. Lemke Straw bales along southern boundary. BMPs installed 4/30/96 (V. Hesch, 4/98). BMPs inspected: 4/30/96 (V. Hesch, 4/98) NO Due to run-on to the site potential for erosion on the site exists. No evidence of discharge from the PRS (See #7). BMPs in place. 32-002(b) 15.8 10/7/1997 YES NO NO NO North side of Los Alamos Canyon, south of county annex building, adjacent to PRS 32-003. Site of old septic tanks (removed). Sparse vegetation. Area primarily covered with wood chips. NO NO YES Run-on from asphalt behind county annex building is causing some rill on-site. Erosion contained on-site. NO NO T. Lemke Straw bales along southern boundary. BMPs installed 4/30/96 (V. Hesch, 4/98). BMPs inspected: 4/30/96 (V. Hesch, 4/98) NO Due to run-on to the site potential for erosion on the site exists. No evidence of discharge from the PRS (See #7). BMPs in place. 32-003 33.7 10/7/1997 YES NO NO NO At edge of mesa top on north side of Los Alamos Canyon, south of county annex building. Sparse vegetation. Area primarily covered with wood chips. YES NO Evidence of run-off at western most edge of site. No other evidence. Mesa top between PRS and L.A. Canyon Small rill has formed at western edge of site where straw bale CMP ends. YES Run-off from asphalt behind county annex building causing the erosion and run-on to the site. NO NO T. Lemke Straw bales along southern boundary of PRS. BMPs installed 4/30/96 (V. Hesch, 4/98). BMPs inspected: 4/30/96 (V. Hesch, 4/98) NO Additional erosion potential exists at western boundary of PRS where run-off flows from the asphalt surface to the north. 32-004 42.0 7/24/1999 YES NO NO NO Site of former septic/outfall on north side of Los Alamos Canyon behind county annex building. Outfall has been removed. Ground cover on mesa top mixed with exposed soil, grasses and canopy cover extending over edge of mesa. Septic located on flat lying area, outfall discharged over mesa edge onto cliffs below. YES NO Runoff evidence near outfall observed. No evidence on mesa top near former septic tank location. bench Runoff appears to terminate onto a short bench area below the site, above LA Canyon. None observed. YES Asphalt conveyance draining run-off from nearby businesses now located in the area of the old outfall. NO No operational impact NO None observed. Veenis, Steve Straw bale check dam was installed for surface water diversion above excavation site and also placed below excavated areas. Area was reseeded and jute mat was placed on site. BMPs installed 4/30/96. Additional reseeding was done in Spring of 1999. NO Site was re-evaluated to include outfall. The original assessment performed on 10/7/97 did not include former outfall.