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Section 10 - 50 + 00 <br /> Ditch RD-2 outfall is located 20 yards below first unnumbered culvert. <br /> Unnumbered culvert was apparently installed to mitigate erosion below <br /> RD-2 outfall . Road gradient would allow for construction of a rolling <br /> dip in vicinity of 54 + 00, at end of guard rail below RD-2. <br /> Between 54 + 00 and 50 + 00, road was constructed without significant <br /> earthwork. At 50 + 00, there is a second unnamed 24" culvert. Discharge <br /> channel below outlet makes an abrupt right angle turn. Outfall channel <br /> should be straightened out to alleviate recurring maintenance need. <br /> Reseed disturbance on completion of work. <br /> Section 11 - 36 + 00 <br /> Second unnumbered culvert to ditch outfall RD-1 ( 1 ,400 feet) . Major <br /> portion of this segment is in competent rock cut <br /> ( igneous dike 43 + 50 - 45 + 00) . Road width averages 25 feet. <br /> Some erosion on fill slope between sta. 40 + 00 and RD-1 . Fill crest <br /> reduction and revegetation recommended. Recommend silt fence on gentle, <br /> vegetated slope 40-50 feet below RD-1 outfall . Series of water bars may <br /> be warranted but should be outfall protected to avoid excessive erosion <br /> of steep down slopes and cut slopes of road below. <br /> Section 12 - 34 + 00 <br /> 200 foot segment of road from RD-1 around switchback curve. Road width <br /> at switchback is approximately 70 feet. Width should be reduced and <br /> surface graded to eliminate rills on inside portion of road surface at <br /> switchback. Recommend rolling dip below switchback at approximately 34 + <br /> 00. Rip and revegetate unneeded road width. <br /> Section 13 - 10 + 00 <br /> 2,400 foot segment of road in cut and fill from 34 + 00 to Culvert C-3 . <br /> Water bars recommended . Where possible, water bars should be tied in <br /> with outfalls from water bars on road segment above RD-1 switchback. Due <br /> to steep fill slope, some type of outfall protection will probably be <br /> warranted. Recommend fill slope crest reduction/revegetation. Also silt <br /> fencing along base of fill . <br /> Where eater bars will discharge into defined channels or rocked gullies , <br /> check dams to reduce flow velocities would be recommended. One or more <br /> rolling dips may be appropriate along this segment. <br /> Culvert C-3 has rusted out and will need to be replaced with a new <br /> culvert or a low water crossing. <br /> Section 14 - 5 + 50 <br /> C-3 to C-2 (South Fork Dutch Creek) <br /> Possibly recontour road to avoid any flow concentration. leave C-2 <br /> culvert in place . <br /> /ern 7436F <br /> -7- <br />