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 />
ROAD 600<br />
Mileage begins at junction of Road 500 and proceeds north to junction of Road 300.<br />
Site 1: Mile 0.0 (Jct. Rd. 500) to 0.3 (1584 ft.)<br />
Priority: Medium<br />
Roadway was constructed on a flat hill-slope and cannot be outsloped. The inboard ditch is<br />
largely non-existent on this stretch of road. Drainage structures are mainly waterbars, which are<br />
degraded and only partially work. Therefore runoff onto the roadway has led to rill formation and<br />
potential gullies. The grade of this road is approx. 5-8%, which would make rolling dip installation<br />
difficult.<br />
Remedial treatments include:<br />
1. Slope or Crown roadbed<br />
2. Install rolling dips<br />
3. Install inboard ditch if necessary<br />
4. Excavate outside berm and smooth over roadway as much as possible<br />
5. Armor outfalls<br />
6. Rock surface<br />
Site 2: Mile 0.3 to 0.9 (3168 ft.)<br />
Priority: Medium<br />
This section of road is insloped with an outside berm with no inboard ditch. Existing waterbars are<br />
responsible for all road surface drainage. Very rocky. Waterbars should be up-graded.<br />
Remedial treatments include:<br />
1. Outslope road<br />
2. Install rolling dips and/or improve waterbars<br />
3. Excavate outside berm and smooth over roadway<br />
4. Armor outfalls<br />
5. Rock surface<br />
Site 3: Mile 0.9 to 1.2 (1056 ft.)<br />
Priority: Medium<br />
This section of road is insloped with an outside berm and no inboard ditch. Drainage structures<br />
(waterbars) have partially failed in this section and rills and gullies have formed in the roadway.<br />
There has been significant erosion to the roadway with extensive gullies characterizing this site.<br />
The soil type (Hugo) in this section of road appears to be decomposed granitic soils (Blue Goo).<br />
Winter use has exasperated the problem. Sediment delivery to a watercourse, which feeds Malo<br />
Creek, is a major problem in this section of road. Major mud bog at 1.2 miles. Some exposed<br />
rock, lots of loose rock. Waterbars should be up-graded.<br />
Remedial treatments include:<br />
1. Outslope or Crown roadbed<br />
2. Install rolling waterbars<br />
3. Install inboard ditch from mile 0.95 to 1.0 ( approx. 250 feet)<br />
4. Excavate outside berm and smooth over roadway as much as possible<br />
5. Armor outfalls<br />
6. Rock surface<br />
7. Fill “Mud Bog” area with 6-inch minus compacted shale rock.<br />
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