Boggs Mountain Demonstration State Forest Draft ... - Cal Fire
Boggs Mountain Demonstration State Forest Draft ... - Cal Fire
Boggs Mountain Demonstration State Forest Draft ... - Cal Fire
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<strong>Boggs</strong> <strong>Mountain</strong> <strong>Demonstration</strong> <strong>State</strong> <strong>Forest</strong> <strong>Draft</strong> Management Plan, June 2008<br />
4. Improve existing drainage structures<br />
5. Rock surface<br />
Site 4: Mile 0.9 to 1.0 (Jct. Rd. 200) (528 ft.)<br />
Priority: High<br />
This section of road is insloped with an outside berm and inboard ditch. Concentrated runoff from<br />
this section of road has severely impacted Road 100, which is down slope approx. 100 feet.<br />
Outfalls from all drainage structures need to be armored and outflows need to be dissipated<br />
before reaching Road 100.<br />
Remedial treatments include:<br />
1. Outslope road surface<br />
2. Excavate outside berm and smooth over roadway<br />
3. Install rolling dips<br />
4. Improve existing drainage structures<br />
5. Armor outfalls<br />
6. Rock surface<br />
Site 5: Mile 0.0 (Jct. Rd. 200) to 0.4 (2112 ft.)<br />
*note: restart mileage from junction Rd. 200 heading east.<br />
This section of road is insloped with an outside berm and inboard ditch. The inboard ditch has<br />
failed in several locations due to sediment deposition and dense vegetation within the ditch. This<br />
has directed runoff onto the roadway and has led to surface erosion. Drainage structures<br />
(waterbars) have failed in this section and rills have formed in the roadway. Ditch relief culverts<br />
are prone to plugging and overflowing onto the roadway. There are numerous seeps (springs)<br />
emanating from the cutbank. Local “Mud boggers” have taken advantage of the extensively<br />
saturated conditions to further damage the road surface.<br />
Remedial treatments include:<br />
1. Outslope road surface<br />
2. Clean and improve inboard ditch<br />
3. Clean and maintain ditch relief culverts<br />
4. Excavate outside berm and smooth over roadway<br />
5. Install rolling dips<br />
6. Armor outfalls<br />
7. Rock surface<br />
8. Fill “Mud Bog” areas with 6-inch minus compacted shale rock.<br />
Site 6: Mile 0.42<br />
Upper Mill Creek<br />
Priority: High<br />
Problems here are very similar to the conditions at Bluff Spring. The inboard ditch associated with<br />
this site is plugged with vegetation and commonly overflows onto the roadway during winter<br />
storms. Leaks from a water tank just above the road have saturated the soil and moved into the<br />
roadbed. Additional runoff is concentrated from a hiking/biking trail (Jethro’s) which intersects the<br />
road where the spring activity occurs. Sediment is being delivered to the watercourse from the<br />
eroded recreational use trail and from the roadway.<br />
Remedial treatments include:<br />
1. Clean and improve inboard ditch<br />
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