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

Boggs Mountain Demonstration State Forest Draft Management Plan, June 2008
Geology
Geologically, BMDSF is complex. The State Forest is on a lava cap area about one mile wide by
3.5 miles long, forming a gently rolling summit with the sides breaking down into moderate to
steep slopes. There are a few small areas of steep slopes and rock outcrops. Volcanic rocks are
exposed over much of the forest. Andesites and basalts are visible as outcrops and along roads
over most of the upper elevation, with the lower slopes of the northwest portion having volcanic
rocks cap sandstones and mudstones.
Water Resources
BMDSF is a part of the top of Boggs Ridge, which is mostly a dry ridge top that runs
northwest/southeast separating Putah Creek and Kelsey Creek watersheds. Boggs Mountain is
part of the headwaters for the Kelsey Creek and Putah Creek drainages. Kelsey Creek is in the
Clear Lake watershed; Putah Creek is in the Lake Berryessa watershed. Drainages on the forest
are first and second order with no fisheries resources. Several landowners use water that comes
directly from BMDSF. Most of these are in the east side of the forest including Ettawa Springs
and Harbin Hot Springs. BMDSF has at least one easement for BMDSF water.
Surface water is uncommon on the forest. There are 3.8 miles of perennial streams; portions of
Grouse Spring, Houghton, Malo and Spikenard Creeks. Three springs exist on the forest: Big
Springs, Bluff Springs and Houghton Springs have been developed to fill fire suppression storage
tanks.
Table 3. Perennial streams on BMDSF.
Big Springs Creek
.50 mi.
Grouse Spring Creek
.25 mi.
Houghton Creek
.76 mi.
Malo Creek
.76 mi.
Mill Creek
.76 mi
Spikenard Creek
1.14 mi.
TOTAL
3.8 mi.
Roads
An access road system based on the original logging road network was established shortly after
the Forest was acquired. Starting in 1965, major portions of the original road system were rebuilt
improving grades, alignment, and drainage. Some short sections of new roads were constructed
to avoid adverse grade problems. The 22 mile road system consists of 12 miles of primary, allweather
roads and 10 miles of secondary seasonal roads. No further additions to the road system
are planned. Existing roads will be improved or decommissioned as funds and opportunities
arise.
All roads on BMDSF that are no longer required for management and recreational purposes will
be considered for abandonment. Roads to be abandoned will include user-generated roads,
temporary roads, and roads to be permanently closed. User-generated roads are those that
vehicles have made by not following a recognized BMDSF road and creating tracks for others to
follow. Temporary roads can be defined as roads that are used for one or two years for timber
sale activity and then abandoned. They may be reopened and reused in the next timber sale
entry.
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