Boggs Mountain Demonstration State Forest Draft ... - Cal Fire

Boggs Mountain Demonstration State Forest Draft Management Plan, June 2008
Remedial treatments include:
1. Outslope road surface
2. Excavate outside berm and smooth over road surface
3. Install rolling dips
Site 8: Mile 3.2 to 3.3 (End) (528 ft.)
This section of road is insloped or crowned with an outside berm. There is moderate to heavy
erosion occurring just past Big Spring due to an old road that delivers concentrated runoff directly
onto the road surface of Road 100 (mile 3.2). A deep gully has formed in the old road due to the
failure or lack of drainage structures. A waterbar on Road 100 partially drains this excess runoff,
but the waterbar itself is heavily eroded. Drainage structures need to be installed on the old road
to prevent the current erosion problem. There is no inboard ditch nor ditch relief culverts in this
stretch of road. The outside berm prevents free-flow drainage of the road surface. Existing
waterbars are responsible for road surface drainage. Major mud bogs in this section.
Remedial treatments include:
1. Outslope road surface
2. Excavate outside berm and smooth over road surface
3. Install rolling dips or rocked fords
4. Install drainage structures on old road (i.e. waterbars, cross-road drains)
ROAD 200
Mileage begins at the junction of Road 300.
Site1: Mile 0.0 to 0.15 (792 ft.)
Priority: Medium
This section of road is insloped with an outside berm and an inboard ditch. Ditch relief culverts
have not been functioning properly in this section of road. These culverts are prone to plugging
from rocks and debris carried by the inboard ditch. The road grade on this section of road is
approximately 8%. Drainage structures such as waterbars will need to be maintained. Water
bars seem to be working in this section of road.
Remedial treatments include:
1. Outslope road surface
2. Remove ditch relief culverts and replace with rolling dips or rocked fords
3. Excavate outside berm and use spoil to fill inboard ditch
4. Rock surface
5. Armor drainage outlets
Site 2: Mile 0.15 to 0.3 (792 ft.)
Priority: Medium
This section of road is insloped with an outside berm and an inboard ditch. Fine sediment is being
delivered to an adjacent watercourse, which parallels the road. Ditch relief culverts are prone to
plugging from rocks and debris carried by the inboard ditch. The road grade on this section of
road is approximately 4%. Exposed rock at .15 miles.
Remedial treatments include:
1. Retain insloped road prism
2. Improve and armor inboard ditch
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