KRIS Information System

Area	South Fork Garcia
Topic	Sediment: Road-Related Erosion Potential Volume in SF Garcia 1998

Caption: The Source Table sed_road_sfgar_mrcpwatu_1998_source.db shows potential future sources of road-relation erosion in the South Fork Garcia watershed, based on road survey data collected during 1998. Data were provided by Trout Unlimited and Pacific Watershed Associates (2002). See InfoLinks for more information, including a full key to column headings.

50 rows of a possible 149 have been displayed.

Site . GPS coord Watershed CALWAA Photo T/R/S Road . Mileage Inspector Date Year Built Surface Sketch? Road class Maintained? Abandoned? Decomissioned? Driveable? Problem Location of problem Average road width Road related? Harvest history Geomorphic association road fill failure? landing fill failure? cutbank slide? deep slow landslide? hillslope debris slide? streamside slide? Did slide torrent? Slope shape Slope % distance to stream _ft_ already failed? potential failure? Culvert Bridge Humboldt Fill Ford Armored fill Washed out Pulled crossing % Pulled Left ditch/road length _ Right ditch/road length _ Pipe diameter _in_ Inlet Outlet Bottom Headwall height _in_ Cmp slope% Stream class Rustline at inlet _in_ CMP appears undersized? % washed out Diversion Potential? Currently diverted? Diverted in past ? Road Grade% Culvert plug potential Channel grade% Channel width _ft_ Channel depth _ft_ Sediment Transport Drainage Area Now Bankful Now width Now depth BF width BF depth 50 Yr Q _cfs_ 100 Yr Q _cfs_ Erosion Potential Potential for extreme ero Volume of extreme erosion Age of past erosion _deca Road surface, ditch, fill Gullied fillslope Fill failure Cutbank failure Hillslope failure Streambank and channel er Stream crossing failure Total Past Erosion _yds_ Past delivery% Total Past Yield _yds3_ Future Erosion _yds3_ Future delivery% Future width _ft_ Future depth _ft_ Future length _ft_ Future Yield _yds3_ Comment on Problem

- - SF Garcia 0 7-3 - F-line 0 NC,TK 10/13/98 0 Native True 0 True False False True Gully Upper 0 True - SW False False False False False False False - 0 0 False False False False False False False False False False 0 335 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 13 100 2 0.5 350 13 Water bar delivers to ephemeral class 3 (now dry) shows older signs of scour and transport. Waterbar is fed by 335' of road surface. Water bar 335' up road from this site is leaking slightly back onto the road. Road is confined by through-cut with no o

1.1 - SF Garcia 0 7-3 - F-line 0 TK,NC 10/13/98 0 Native True 0 True False False True Stream crossing Upper 0 True - ST False False False False False False False - 0 0 False False False False False True False False False False 0 475 0 0 - - - 0 0 3 0 - 0 True False True 9 - 35 2 0.5 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 223 100 16 10 37 223 Class 3 crossing with no culvert. 475' of left road at 14% with waterbars lead to this crossing. --Road has no ditch and is outsloped. Little erosion on fillslope. Small cracks 15' wide on OBF.

2 - SF Garcia 0 7-3 - F-004 - MM,ST 10/13/98 0 Native True 0 False True False False Stream crossing Upper 0 True TC1 ST False False False False False False False - 0 0 False False False False False True False False False False 0 15 10 0 - - - 0 0 3 0 - 0 False False False 0 - 35 2 1 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 16 16 100 16 190 100 20 7 37 190 Filled class 3 stream crossing. Channel is skidded above, and small gully goes across road and down fillslope. Not much channel activity below BOT. Channel has been dipped and seems to be O.K. Sediment transport very low and erosion is low. Called fo

3 - SF Garcia 0 7-3 - F-004 0 ST,MM 10/13/98 0 Native True 0 False True False False Stream crossing Upper 0 True TC1 ST False False False False False False False - 0 0 False False True False False False False False False False 0 120 20 18 O O O 8 17 3 0 Yes 0 True False False 1 M 56 3 1 ML 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 33 33 100 33 245 100 8 10 83 245 Class 3 stream crossing with 18" CMP. Channel appears active and is transporting woody debris and boulders (~.5 ft). CMP has 40' of downspout which carries water over fill and drops into (6x6x10) a scour hole. Past OBF failure along both approaches to

4 - SF Garcia 0 7-3 - F-004 0 MM,ST 10/13/98 0 Native True 0 False True False False Landslide Upper 0 True TC1 SW True False False False False False False Convergent 65 50 True True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 HM False - - 0 0 93 0 0 0 0 93 100 93 136 80 92 2 20 109 Multiple springs in swale converge and caused past fill failure. 6" - 1' scarps along OBF indicate future failure (92x2x20) = 136 yd^3. Failure delivers to class 3 from site #3 ~50' below road fill. Spring to right has gully which was at first consider

5 - SF Garcia 0 7-3 - B-line 0 ST,MM 10/13/98 0 Native True 0 True False False True Stream crossing Middle 0 True TC1 ST False False False False False False False - 0 0 False False True False False False False False False False 0 0 0 36 O O O 49 16 3 0 Maybe 0 True False True 15 ML 18 3 1 M 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 48 48 100 48 7628 100 21 35 280 7628 Class 3 stream wit 36" CMP. A skid above inlet has us extending our TOP upstream to layback banks. Channel above inlet has near vertical banks and has incised 2-3' into swale. Pipe is installed at a shallow gradient with a long downspout to pass flow o

6 - SF Garcia 0 7-3 - F-005 0 NC,TK 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 175 0 36 P P O 0 18 3 0 Yes 80 False False True 5 H 10 9 1 H 0 0 0 0 0 0 0 0 0 M False - 1990 0 0 0 0 0 0 201 201 100 201 720 100 20 12 104 720 Stream crossing with 36" alum. CMP is 75% blown (not passable by quad). Pipe is plugged at inlet from accumulated sed./debris flow with large coarse material. Stream has diverted in past 170' to next xing. Currently no DP. 201 yd^3 of past erosion wit

7 - SF Garcia 0 7-3 - F-005 0 TK,NC 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 170 200 0 - - - 0 0 3 0 - 98 True False True 0 - 38 6 1.5 M 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 214 214 100 214 7 100 3 1 50 7 Class 3 crossing with no culvert. 98% washed out. Erosion through the crossing is 17'x10' deep. Incised channel below eroded crossing.

8 - SF Garcia 0 7-3 - F-005 0 NC,TK 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 0 0 - - - 0 0 3 0 - 0 False False False 0 - 55 2 0.5 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 55 100 6 4 62 55 Fill stream crossing in faint 2x.5 stream. Road is outsloped eliminating D.P. little past erosion. Road surface is grassy w/ fir and redwood saplings.

9 - SF Garcia 0 7-3 - F-005 0 TK,NC 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 150 0 36 O O O 48 18 3 0 No 0 True False False 2 ML 20 6 1 ML 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 15 15 100 15 208 100 15 7 57 208 Class 3 stream crossing with 36" CMP. Erosion below outlet of culvert to BOT, otherwise culvert is functioning O.K. Crossing has a faint diversion potential. Minor cracks in OBF. Road leading to crossing is 150' with slight outslope, waterbar, and fil

9.1 - SF Garcia 0 7-3 - F-005 0 NC,TK 10/13/98 0 Native True 0 False True False False Landslide Middle 0 True TC2 Other True False False False False False False Convergent 85 150 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 338 20 87 3 35 66 Unstable OBF. Older, mossy, continuous scarps are 6" - 18" V.D. up to 6' back from OBF. Will deliver to stream on left. Approx. 150' downslope, 20% delivery.

10 - SF Garcia 0 7-3 - F-005 0 TK,NC 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 90 0 - - - 0 0 3 0 - 2 True False True 13 - 21 2 0.5 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 1 1 100 1 8 100 4 3 20 8 Class 3 crossing with no culvert. Little erosion through road bed. A dipped crossing will suffice. Stream has diverted in the past to the left.

10.1 - SF Garcia 0 7-3 - F-005 0 NC,TK 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 200 0 - - - 0 0 3 0 - 0 True False False 7 - 18 3 0.5 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 113 100 10 6 51 113 Filled stream crossing with faint signs of 3x.5 channel above road. Little to no active erosion down fillslope. Road is mildly dipped but D.P. does exist to left. Older 12" scarp near hinge line on left OBF. Hard to visualize stream would have enough

10.2 - SF Garcia 0 7-3 - F-005 0 TK,NC 10/13/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 0 0 - - - 0 0 3 0 - 20 True False True 0 - 36 3 1 L 0 0 0 0 0 0 0 0 0 M False - 1990 0 0 0 0 0 0 6 6 100 6 40 100 7 3 60 40 Class 3 stream with no culvert. Crossing is 20% washed out. D.P. to left. Stream is at low grade (20%). Sink holes are present above IBR. Road has little fill and a 4x1 gully through the road bed.

11 - SF Garcia 0 7-3 - B-line 0 MM,ST 10/13/98 0 Native True 0 True False False True Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 120 0 - - - 0 0 3 0 - - True False True 10 - 32 2 0.5 L 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 7 7 100 7 210 100 12 9 53 210 Class 3 filled xing, has D.P., but is currently directed across road by waterbar. Waterbar is @ 1.5 deep and functioning. Skid road failure above site, deposits in stream above IBR. Not much delivery from past failure, but some future failure exist, s

12 - SF Garcia 0 7-3 - B-line 0 ST,MM 10/13/98 0 Native True 0 True False False True Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 180 120 48 P O O 134 16 3 0 Yes 0 False False False 0 H 24 10 1 H 0 0 0 0 0 0 0 0 0 H False - - 0 0 0 0 0 0 0 0 0 0 1197 100 32 20 48 1197 Two class 3 streams converge at 48" CMP. 4x1 stream in line with swale and CMP has signs of transport. 6x1 stream parallels B-line road left from site and has high transport through the reach. 6x1 contributed to filling the sediment basin above inlet w

13 - SF Garcia 0 7-3 - B-line 0 TK,NC 10/13/98 0 Native True 0 True False False True Stream crossing Middle 20 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 225 0 36 P O O 0 7 3 0 Maybe 0 True True True 5 HM 7 6 1 H 0 0 0 0 0 0 0 0 0 HM False - 1990 50 0 0 0 0 0 0 50 100 50 251 100 13 4 130 251 Diverted class 3 parallels main haul road. Channel is heavily aggraded, 36" culvert plugged--diversion gully continues to crossing #12. Pipe is unnecessary if channel is confined to right of road. Road width = 20'. Reduce road width & move it left to

14 - SF Garcia 0 7-3 - B-line 0 ST,NC 10/14/98 0 Native True 0 True False False True Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 150 170 24 P O O 0 22 3 0 Yes 40 False False False 0 H 31 6 1 H 0 0 0 0 0 0 0 0 0 H False - 1990 0 0 0 0 0 0 315 315 100 315 885 100 24 18 72 885 6x1 class 3 stream has plugged and overtopped crossing, causing a large blow out 13' back from OBF. 24" CMP is plugged and extends out 50' from blown out fill. 5' thick deposit above inlet has channel (confined) incised along left hinge of swale (3' deep

15 - SF Garcia 0 7-3 - B-line 0 NC,ST 10/14/98 0 Native True 0 True False False True Landslide Middle 0 True TC2 IG True False False False False False False Planar 85 15 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 208 80 75 3 25 166 Unstable OBF along 75' of road has older scarps 6" - 12" V.D. 4'-6' back from OBF. Discontinuous scarps downslope revealing organics in fill. Stream is fed by a waterbar gully which collects flow from 175' of road surface. Road is through-cut and ther

16 - SF Garcia 0 7-3 - F-line 0 NC,TK 10/14/98 0 Native True 0 True False False True Gully Middle 0 True TC2 Other False False False False False False False - 0 0 False False False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 H False <500 - 0 0 0 0 0 0 0 0 0 0 7 100 2 0.5 100 7 Gully from 200' of accumulated road surface runoff flows over OBF to stream below. Further up the road the surface is water barred to a swale that dissipates flow. When those waterbars fail an additional 150' of road surface and flow from gullied, non d

17 - SF Garcia 0 7-3 - F-line 0 ST,NC 10/14/98 0 Native True 0 True False False True Landslide Middle 0 True TC2 SS False True False False False False False Planar 75 40 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 44 75 78 1 15 33 Cracks along OBF indicate future fillslope failure into class 3 stream paralleling road F-line. Avg. distance to stream is 40' over 75% slope. Road surface has 3 waterbars to break up road/ditch flow. Minimal outlet erosion at waterbars. A small benc

18 - SF Garcia 0 7-3 - F-line 0 NC,ST 10/14/98 0 Native True 0 True False False True Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 35 40 60 O O O 78 8 2 3 No 0 False False False 0 L 4 7 2 M 0 8 7 8 2 11 3 0 0 HM False - - 0 0 0 0 0 0 0 0 0 0 552 100 23 16 41 552 Class 2 stream crossing with 60" Alum CMP over old Humboldt. Flow goes subsurface 32' above inlet (TOP). Flow emerges 4' under pipe in Humboldt. Bottom of plunge pool is 10' below bottom of outlet. Left and right OBF unstable, will be removed if treat

19 - SF Garcia 0 8-5 - G-006-17 0 TK,NC 10/15/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 0 0 - - - 0 0 3 0 - 0 True False False 10 - 45 2 1 L 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 1 1 100 1 2 100 5 1 11 2 Class 3 stream with fill crossing on a skid road. Site is in conjunction with #19 on main road G-006-17 below. Crossing has a diversion and needs decommissioning from TOP to BOT. Skidded channel below BOT is site #19. Stream is currently flowing.

19.1 - SF Garcia 0 8-5 - G-006-17 0 ST,TK 10/15/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 50 0 - - - 0 0 3 0 - 0 False False False 0 - 30 2 1 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 20 100 4 2 68 20 Small class 3 stream crosses skid road (site #19) and crosses road G-006-17 with a small 2x1 stream channel. Sediment transport appears low with low erosion potential due to small drainage area feeding stream. Below TOP but above IBR is small sediment f

20 - SF Garcia 0 8-5 - G-006-17 0 TK,ST 10/15/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 0 0 24 P O O 0 12 3 0 Maybe 0 False False False 0 M 12 2 1 M 0 0 0 0 0 0 0 0 0 L False - 1990 0 0 0 0 0 0 0 1 100 1 24 100 6 3 36 24 Incised class 3 at low gradient has plugged 24" CMP. CMP plugged with cobble and fines. Little erosion at crossing and stream deposits at culvert outlet.

21 - SF Garcia 0 7-3 - B-017 0 TK,MM 10/14/98 0 Native True 0 False True False False Landslide Middle 0 True TC2 SS False True False False False False False Convergent 35 30 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 150 20 45 3 30 30 Potential future saturated landing fill failure (45x3x30) with 20% delivery. (150yds with 30 yds delivered). 35% slope. 30' with lots of wood near stream channel to catch most material. Suspect slide will deliver to a class 2 stream out of the south fo

22 - SF Garcia 0 7-3 - F-008 0 MM,TK 10/14/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 40 0 36 O O O 34 5 3 0 No 1 False False False 0 ML 5 4 1 M 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 9 9 100 9 113 100 12 7 36 113 Class 3 crossing with 36" Alum CMP, and 10' half round downspout. Pipe is working O.K., 9 yds past erosion at downspout outlet. Channel above looks skidded, with eroding banks. Channel below also scoured. Wet crossing will work here, low fill, low use

23 - SF Garcia 0 7-3 - F-008 0 TK,MM 10/14/98 0 Native True 0 False True False False Landslide Middle 0 True TC2 SS True False False False False False False Convergent 80 50 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 1322 70 255 4 35 925 Potential future road fill failure. Present cracks 7' back in road bed. Excavate (255x4x35). Potential road fill failure adjacent to class 3 stream near site #22. 1332 yds @ 70% delivery = 925 yds. Trees on fillslope.

24 - SF Garcia 0 8-4 - G-006-06 0 NC,MM 10/15/98 0 Native True 0 True False False True Landslide Lower 0 True TC2 HD True False False False False False False Convergent 80 300 False True False False False False False False False False 0 140 325 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 ML True <500 - 0 0 0 0 0 0 0 0 0 0 519 75 5 7 40 389 18" CMP drains spring. As spring 75' to right drains past a waterbar to OBF aver this CMP. Combined flows have gullied (3x2) down fill/hillslope to stream below. OBF is unstable for 50' centered on pipe. Faint continuous crack on centerline of road.

25 - SF Garcia 0 8-4 - G-006-06 0 NC,MM 10/15/98 0 Native True 0 True False False True Landslide Lower 0 True TC2 IG True False False False False False False Planar 75 300 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 0 0 0 0 233 30 45 4 35 70 Older cracks in OBF extend up to 7' back from OBF. Faint signs of slumping on left portion of site near xing #26 up to 8'back from OBF. Delivery is to stream at xing #26 on left and Garcia river 300' downslope. There is a spring/seep at IBR at left end

26 - SF Garcia 0 8-4 - G-006-06 0 MM,NC 10/15/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 45 50 18 O O O 22 14 3 0 Yes 1 False False False 0 ML 34 2 1 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 9 9 100 9 161 100 12 9 40 161 Class 3 stream gullies through old slide, one gully drains to 18" CMP, the other misses CMP and gullies across road through water bar. See sketch. Spring ~20' to right also drains to CMP. Channel below BOT looks O.K. CMP is offset from channel ~10' t

27 - SF Garcia 0 8-4 - G-006-06 0 NC,MM 10/14/98 0 Native True 0 True False False True Ditch relief culvert Lower 0 True TC2 HD False False False False False False False - - - False False True False False False False False False False 0 0 0 18 O O O 0 10 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 ML False <500 - 0 0 0 0 0 0 0 0 0 0 1 100 2 0.5 30 1 Headwall spring is drained by 16" aluminum CMP. Above road is older, now fairly stable headwall scarp with soil slumping toward road. Inlet is ripped indicating past clean out of slumping material. Inlet drains right and left ditch that collects spring

28 - SF Garcia 0 8-4 - G-006-06 0 MM,NC 10/15/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 60 15 0 - - - 0 0 3 0 - 0 False False False 0 - 26 2 0.5 L 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 9 9 100 9 46 100 7 5 42 46 Filled class 3 stream xing. Channel dimensions 2x.5. Gully down OBF - fillslope, (4x2x30). Site should have CMP, due to amount of fill & steepness. At BOT is flat area, where stream continues. Gully looks active, causing slumping along OBF.

29 - SF Garcia 0 8-4 - G-006-06 0 ST,TK 10/15/98 0 Native True 0 False True False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 80 0 - - - 0 0 3 0 - 0 True True True 1 - 36 3 0.5 L 0 0 0 0 0 0 0 0 0 ML False - 1990 0 47 0 0 0 0 3 50 94 47 42 100 6 5 38 42 Small class 3 stream with filled crossing and diversion potential to left of site. Diversion has caused 47 yds of past erosion of ditch and fillslope, delivering to class 1 stream below. Small gully at OBF of crossing does not deliver. Mod. Immediacy s

30 - SF Garcia 0 8-5 - G-006-06 0 ST,TK 10/15/98 0 Native True 0 False True False True Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 0 0 - - - 0 0 3 0 - 0 False False False 0 - 14 3 0.5 M 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 45 100 6 3 68 45 3x.5 class 3 stream crosses road with a filled crossing with many organics in fill. Above IBR there are pockets of stored sediment trapped behind woody debris and in place small redwoods and shrubs. Small channel crosses road and spills over OBF into a

31 - SF Garcia 0 8-5 - G-006-17 0 TK,ST 10/15/98 0 Native True 0 False True False False Stream crossing Middle 0 True TC2 ST False False False False False False False - 0 0 False False False False False True False False False False 0 0 0 0 - - - 0 0 3 0 - 0 False False False 0 - 10 3 0.5 L 0 0 0 0 0 0 0 0 0 L False - - 0 0 0 0 0 0 0 0 0 0 6 100 6 3 9 6 Class 3 stream flows onto skid then across road G-006-17. Flow ponds at BOT below road prism. Recommend dipping skid & main road to shed water off of road surface. No future from potential crossing wash out because there is no delivery.

32 - SF Garcia 0 8-4 - G-006-06 0 NC,MM 10/15/98 0 Native True 0 False True False True Ditch relief culvert Lower 0 True TC2 IG False False False False False False False - 0 0 False False True False False False False False False False 0 75 0 18 O O O 0 10 0 0 - 0 False False False 0 L - 0 0 L 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 0 0 0 0 100 50 45 3 20 50 Failing OBF with 18" DRC. If water had not been collected & directed to DRC, unstable OBF to right and left of pipe would not deliver. Crack in road bed up to 9' back from OBF avg. 6'. Road surface is heavily grassed with few wet site vegetation. No e

33 - SF Garcia 0 8-4 - G-006-06 0 ST,TK,MM 10/15/98 0 Native True 0 False True False True Landslide Lower 0 True TC2 IG False True False False False False False Divergent 80 350 False True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 0 0 0 0 667 20 120 5 30 134 Scarps along OBF and down through fillslope indicate future slide with delivery to class 1 stream below. Past slide along right side of landing has failed with some delivery. Past failure 120' below OBF in center of landing has destabilized above slope.

34 - SF Garcia 0 8-4 - G-006-06 0 MM,NC 10/15/98 0 Native True 0 False True False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 0 85 18 O O O 0 33 3 0 Yes 0 True False True 4 HM 36 3 1 ML 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 7 7 100 7 148 100 12 8 44 148 Class 3 stream with 18" DRC, has M-H plug potential due to fill failure around CMP, on road above ~40'. Also a 8" diameter alder is growing around inlet. Gully erosion from outlet is old and mossed over. Stream diverted down IBD to left ~100' in past,

35 - SF Garcia 0 8-4 - G-006-06 0 TK,ST 10/15/98 0 Native True 0 False True False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 0 180 24 P O O 29 35 3 0 No 0 True False False 1 H 55 3 1 HM 0 0 0 0 0 0 0 0 0 M False - - 0 0 0 0 0 0 10 10 100 10 66 100 10 7 29 66 Plugged class 3 at 24" CMP. Shotgun CMP with scour below outlet needs a downspout. Stream has been degraded above inlet & large rocks have been installed in the silling well to dissipate the steep channels' erosive force. Diversion potential to left.

36 - SF Garcia 0 8-4 - G-line 0 MM,ST 10/16/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 300 0 24 O O O 52 10 2 0 Maybe 30 True False False 5 ML 14 4 1 L 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 100 100 100 100 88 100 15 5 32 88 Class 2 low gradient stream crossing with 24" aluminum CMP. Pipe is working O.K., but 100yds past erosion from outlet area. Erosion looks older and not recently active. Stream may have overtopped in past. 6' drop to plunge pool from outlet, is the mai

37 - SF Garcia 0 8-4 - G-line 0 NC,TK 10/16/98 0 Native True 0 True False False True Ditch relief culvert Lower 0 True TC2 IG False False False False False False False - 0 0 False False True False False False False False False False 0 0 0 12 O O O 24 10 0 0 Maybe 0 False False False 0 L 0 0 0 L 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 0 0 0 0 2 100 2 1 20 2 12" DRC drains a spring and 225' of road/ditch. Nonfunctional rolling dip (not connected to ditch, road insloped & bermed) to left of DRC. OBR is within 15' - 20' of stream. Past erosion at outlet. Recent construction may not be finished.

38 - SF Garcia 0 8-4 - G-line 0 ST,MM 10/16/98 0 Native True 0 True False False True Landslide Streamside 0 True TC2 SS True False False False False False False Planar 140 0 True True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 HM False - - 0 0 0 0 0 260 0 260 100 260 138 100 26 11 13 138 Meandering class 2 stream has scoured the road fill, delivering directly into stream. Stream flow direction and cracks indicate a site of future streambank erosion (138 yds). Mod/high since it delivers to class 2 stream.

39 - SF Garcia 0 8-4 - G-line 0 TK,NC 10/16/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 570 0 36 O O O 48 10 2 0 No - True False True 0 M 4 4 1 ML 0 0 0 0 0 0 0 0 0 L False - 1990 0 0 0 0 0 0 28 28 100 28 144 100 12 8 41 144 Class 2 stream with 36" culvert shotguns into class 1 stream. Large scour hole in fill at pipe outlet. Diversion to right 90' gullies roads fillslope 30' to class1 crossing = 28yds. 570' of left road drainage has large berm and spoil on OBF. Road grad

40 - SF Garcia 0 8-4 - G-line 0 MM,ST 10/16/98 0 Native True 0 True False False True Landslide Streamside 0 True TC2 SS True False False False False False False Convergent 140 0 True True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 H False - - 0 0 0 0 0 70 0 70 100 70 209 100 235 3 8 209 235' stretch of OBF is failing into large class 3 stream just upstream from Fleming Creek bridge. Fill is being undercut due to confined channel. Average road width here is 24' so it can be narrowed, when pulling back OBF. Road is (ave) about 8' above

41 - SF Garcia 0 8-4 - G-line 0 NC,TK 10/16/98 0 Native True 0 True False False True Stream crossing Streamside 0 True TC2 ST False False False False False False False - 0 0 False False False True False False False False False False 0 100 250 0 - - - 0 0 1 0 - 0 False False False 0 L 2 15 3 H 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 0 0 0 0 81 100 28 1 78 81 Bridge over class 1 stream. Deck of bridge was replaced recently. Left abutment (bunk log) is failing . Right bunk log abutment is O.K. but old. Bridge deck approx. 12' above stream bed. Right ditch length is from road G-005 (see sketch).

42 - SF Garcia 0 8-4 - G-line 0 ST,MM 10/16/98 0 Native True 0 True False False True Landslide Streamside 0 True TC2 SS True False False False False False False Convergent 120 14 True True False False False False False False False False 0 0 0 0 - - - 0 0 0 0 - 0 False False False 0 - 0 0 0 - 0 0 0 0 0 0 0 0 0 H False - - 0 0 0 0 0 108 0 108 100 108 289 100 120 5 13 289 165' of past and future fillslope failure directly into class 1 stream 14' below. Road is situated on outside of bend, where streambank erosion is going to happen. High immediacy since site will deliver into class 1 stream.

43 - SF Garcia 0 8-4 - G-006 0 TK,NC 10/16/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False False True False False False False False False 0 85 80 0 - - - 0 0 1 0 - 0 False False False 0 - 2 15 3 H 0 0 0 0 0 0 0 0 0 ML False - - 0 0 0 0 0 0 2 2 100 2 55 100 24 1 62 55 Fleming creek class 1 stream with a bridge crossing. Good wood embedded in the channel. Left bank slightly degraded (3x1x13=1yd). Right bank aggraded with some bank scour (1yd).

44 - SF Garcia 0 8-4 - G-006 0 MM,ST 10/16/98 0 Native True 0 True False False True Stream crossing Lower 0 True ASG ST False False False False False False False - 0 0 False False True False False False False False False False 0 30 0 36 C C O 31 10 2 0 Maybe 5 True False False 1 H 36 7 1 HM 0 0 0 0 0 0 0 0 0 HM False - - 0 0 0 0 0 0 27 27 100 27 252 100 14 7 69 252 Class 2 stream crossing with 36" aluminum CMP which has crushed CMP inlet and outlet. Nice channel above with large 1-2' diameter rocks. Old growth redwood roots along banks. Below outlet is scoured, and a pile of LWD is diverting stream left slightl

45 - SF Garcia 0 8-4 - G-006 0 NC,TK 10/16/98 0 Native True 0 True False False True Stream crossing Lower 0 True TC2 ST False False False False False False False - 0 0 False False True False False False False False False False 0 285 0 24 O O O 26 10 2 0 Yes 60 False False False 0 M 5 4 1 M 0 0 0 0 0 0 0 0 0 H False - - 0 0 0 0 0 0 12 12 100 12 209 100 15 11 36 209 Calss 2 stream crossing with 24" aluminum CMP set high in fill. Evidence of ponding 6' deep upstream of inlet. Inlet is bent but open. Pipe is deformed & bent through crossing but open. Does not appear seperated. Sink hole inboard half of road (9x4x9

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