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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
06-001(a) 3.6 7/31/1997   YES NO NO NO Inactive septic - no outfall pipe or seepage pit found.     NO NO Septic substitute - no water coverage issue!         NO   NO   NO   S. Veenis     NO  
06-001(b) 3.6 7/31/1997   YES NO NO NO Inactive septic.     NO NO No water coverage issues! No outfall or seepage pits found.         NO   NO   NO   S. Veenis     NO  
06-002 3.6 3/30/1998   YES NO NO NO Removed 1,000 gal septic tank, removed 1965, no outfall to daylight. Good revegetation with grass. Gradual slope to south. NO NO           NO   NO   NO   D. Mays     NO  
06-003(a) 3.6 12/11/1997 6-37 YES NO NO NO Structure #6-37, large earthen bermed bowl (depression), south of roadway.  Completely surrounded by 6-ft berm. Grass- and weed like vegetation.  Vegetation extends all the way down to water's edge. Level depression approx. 60-yd from road. NO NO Bowl and bermed area captures all rainwater.   No discharges.         NO   NO   NO   R. Reynolds   Dirt berm. NO No BMPs recommended.  Present BMP effective.
06-003(c) 3.6 7/31/1997   YES NO NO NO   Asphalt covered - surrounded by vegetation and Ponderosa Pines.   NO NO Minor drainage south of site. No potential to run-off into site since it's elevated.         NO   NO   NO   S. Veenis     NO  
06-003(g) 8.8 8/10/1998 6-6 YES NO NO NO Location of removed control building on Two Mile Mesa. Medium-to-good grass cover. Nearly level. NO NO           NO   NO   NO   D. Mays     NO Assessment reconstructed from site map, digitized 1950 aerial photo, and erosion assessment for PRS C-6-007, which was conducted by David Mays on 3/30/98.
06-007(g) 50.8 6/20/2000 6-6 YES NO NO NO Septic system near 6-6 adjacent to drainage channel. Mixed vegetation of grasses and canopy with several barren areas. Mostly flat with a general slope to the north. YES YES Runoff from site enters into adjacent drainage feature that was created as a result of parking lot runoff.     Runoff collects in the drainage which discharges into Two Mile Canyon. Erosional feature bisects the PRS. YES Parking lot and roadway runoff has created the erosional feature. NO No current operations. NO No natural drainage onto site. Veenis, Steve   Staw wattles installed both up and downslope within drainage channel.  Rock/log check dams were installed within channel to provide longer term control. NO Site had minor impact from Cerro Grande Fire.  BMPs installed after the fire.
06-008 8.8 6/3/1999   YES NO NO NO Former UST near concrete bowl structure to the east. Mostly sage and mixed grasses with some barren areas. Gentle slope to the south/southeast. NO NO None observed.       None observed. NO No impact. NO No operational impact. NO None observed. Veenis, Steve     NO Misc. pipes and debris.
C-06-001 8.8 3/30/1998 6-6 YES NO NO NO Flat area, west of Building 6-6, north of Two Mile Mesa Road.  Former magazine. About 30-40% covered with low grass.  Otherwise, exposed clay soils showing cracking from moisture shrinkage. Flat. NO NO           NO   NO   NO   D. Mays     NO  
C-06-003 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-005 3.6 3/30/1998   YES NO NO NO Flat area south of Two Mile Mesa Road.  Former laboratory magazine sites. Thick grassy cover. Flat areas, with very gradual slope to south. NO NO           NO   NO   NO   D. Mays     NO  
C-06-006 3.6 3/30/1998   YES NO NO NO Flat area south of Two Mile Mesa Road.  Former laboratory magazine sites. Thick grassy cover. Flat areas, with very gradual slope to south. NO NO           NO   NO   NO   D. Mays     NO  
C-06-007 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-008 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-009 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-010 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-011 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-012 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-013 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-014 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-015 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-016 3.6 3/30/1998   YES NO NO NO Flat area south of Two Mile Mesa Road.  Former laboratory magazine sites. Thick grassy cover. Flat areas, with very gradual slope to south. NO NO           NO   NO   NO   D. Mays     NO  
C-06-017 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-018 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO  
C-06-020 3.6 3/30/1998   YES NO NO NO Flat area south of Two Mile Mesa Road.  Former laboratory magazine sites. Thick grassy cover. Flat areas, with very gradual slope to south. NO NO           NO   NO   NO   D. Mays     NO  
C-06-021 8.8 3/30/1998   YES NO NO NO On Two Mile Mesa, between road and "Tributary B" of Two Mile Canyon.  Various former magazines, control buildings, etc.  (ONE PHOTO PER PRS) Relatively good grass cover. Generally level areas. NO NO           NO   NO   NO   D. Mays     NO