Lagunitas Creek Stewardship Plan. Marin Municipal Water District
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1 Lagunitas Stewardship Plan Marin Municipal Water District Final June 2011 FIGURES Lagunitas Stewardship Plan Final June 2011
2 Legend Tomales Bay Highway 1 Major Roads Public Lands Marin Municipal Water District Marin County Open Space State Lands Federal Lands Nicasio Reservoir Nicasio Cr Tocaloma Olema Lagunitas Devil's Gulch Larsen r C Dixon Weir San Geronimo Shafter Bridge Peters Dam Kent Lake Highway 1 Lagunitas Watershed Pacific Ocean San Francisco Bay Miles Figure 1. Map of the Lagunitas Watershed
3 Legend Tomales Bay Highway 1 Major Roads Public Lands Marin Municipal Water District Marin County Open Space State Lands Federal Lands Nicasio Reservoir Nicasio Cr Tocaloma Olema Lagunitas Devil's Gulch Larsen r C Dixon Weir San Geronimo Shafter Bridge Peters Dam Kent Lake Highway 1 Lagunitas Watershed Pacific Ocean San Francisco Bay Miles Figure 2. Stream gages on Lagunitas and San Geronimo.
4 Figure 3. California freshwater shrimp; photograph by Larry Serpa (Source USFWS 2007).
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7 Tomales Bay Highway 1 Legend Major Roads Study Area Public Lands State Lands Federal Lands Nicasio Reservoir Nicasio Cr Olema Golden Gate National Recreation Area Tocaloma Devil's Gulch Lagunitas Samuel P. Taylor State Park Shafter Bridge Lagunitas Watershed Pacific Ocean San Francisco Bay Peters Dam Kent Lake Kilometers Figure 6. Lagunitas Winter Habitat Enhancement Assessment Project study area.
8 Figure 7. LIDAR survey boundary for the Lagunitas Winter Habitat Enhancement Assessment (Highway 1 Bridge to Big Bend in SP Taylor State Park).
9 Lagunitas Water Quality and Habitat Improvement Project McIsaac Watershed The five watersheds shown here are all subwatersheds of the Lagunitas watershed. The erosion issues in the Devils Gulch subwatershed (center of the map) and the San Geronimo watershed (lower right, east of confluence at Shafter) are being addressed as part of other projects. Sources: MMWD GIS, 1997 Towhill Ortho data, Calwater USGS Quad Maps (7.5 min.) Portions of San Geronimo, Inverness, Bolinas and Double Pt. Scale: 1:36,000 Prepared by MMWD Sky Oaks Wtrshd HQ GIS January, 2008 Cheda Watershed Lagunitas Cross Marin Trail Watershed Dog Watershed Peters Dam Kent Lake Figure 8. Habitat Improvement Project sub-watersheds Miles
10 Lagunitas Water Quality and Habitat Improvement Project Lagunitas Sir Francis Drake Blvd McIssac Treatment Sites Sediment reduction work on McIsaac Ranch lands is proposed at a number of sites and includes outsloping, rolling dips, armor and wet crossings; thereby strictly minimizing sediment delivery to McIsaac, a tributary to Lagunitas. Sources: Pacific Watershed Asso. 2007, MMWD GIS, 1997 Towhill Ortho Data, Calwater and USGS Quad Maps (7.5 min.) Portions of San Geronimo, Inverness, Bolinas and Double Pt. Scale: 1:10,000 Prepared by MMWD Sky Oaks Wtrshd HQ GIS January, 2008 Figure 9. McIsaac sub-watershed treatment sites ,500 2,250 3,000 Feet
11 Lagunitas Water Quality and Habitat Improvement Project Sir Francis Drake Blvd Lagunitas Cheda Treatment Sites Sediment reduction work on Cheda Ranch lands; Cheda, tributary to Lagunitas, includes constructing outsloping, rolling dips, critical dips, culvert repairs, ditch relief culverts and downspouts. Sources: Pacific Watershed Asso. 2007, MMWD GIS, 1997 Towhill Ortho Data Calwater and USGS Quad Maps (7.5 min.) Portions of San Geronimo, Inverness, Bolinas and Double Pt. Scale: 1:16,000 Prepared by MMWD Sky Oaks Wtrshd HQ GIS January, 2008 Figure 10. Cheda sub-watershed treatment sites ,000 2,000 3,000 4,000 Feet
12 Lagunitas Water Quality and Habitat Improvement Project Sir Francis Drake Blvd Lagunitas Treatment Sites Sediment reduction work, on the Cross Marin Trail in Samuel P. Taylor State Park, along Lagunitas, would construct rolling dips, critical dips, install and repair culverts, ditch relief culverts and downspouts, and install armored fill crossings. Lagunitas Sources: Pacific Watershed Asso. 2007, MMWD GIS, 1997 Towhill Ortho data, Calwater and USGS Quad Maps (7.5 min.) Portions of San Geronimo, Inverness, Bolinas and Double Pt. Scale: 1:18,000 Prepared by MMWD Sky Oaks Wtrshd HQ GIS January, 2008 Figure 11. Cross Marin Trail sub-watershed treatment sites ,000 2,000 3,000 4,000 Feet
13 Lagunitas Water Quality and Habitat Improvement Project Sir Francis Drake Blvd San Geronimo Dog Grade Shafter Lagunitas Peters Dam Rd Treatment Sites Sediment reduction work, below Peters Dam, would involve: (1) replacing an existing culvert with an arched culvert, where Dog meets Lagunitas, that allows fish passage, and (2) strictly minimizing chronic sediment delivery from the road to Peters Dam by constructing a drainage channel and two sediment basins. Sources: Pacific Watershed Asso. 2007, MMWD GIS, 1997 Towhill Orhto Data Calwater and USGS Quad Maps (7.5 min.) Portions of San Geronimo, Inverness, Bolinas and Double Pt. Scale: 1:12,000 Prepared by MMWD Sky Oaks Wtrshd HQ GIS January, 2008 Figure 12. Dog sub-watershed treatment site ,500 2,250 3, Feet
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16 Figure 15. Sediment source sites identified in source assessment studies conducted (Source: Stillwater Sciences 2007)
17 Figure 16. Sediment source sites identified in prior source assessment study from (Source: Stillwater Sciences 2007)
18 Sa Devil's Gulch Samuel P. Taylor State Park Lagunitas Kilometers Peters Dam Kent
19 Mt. Tamalpais Watershed Gateway Project ² Project Location Map ,000 Feet Samuel P. Taylor State Park San Geronimo Sir Francis Drake Blvd Gary Giacomini OSP Improve Gateway Area ^_ Lagunitas San Geronimo Ridge Rd Mt. Tamaplais Improve Foot Trail ^_ Watershed Revegetation Areas New Foot Bridge (to Bolinas Ridge Rd) Shafter Grade Lower Peters Dam Rd (MMWD) Bay Area Ridge Trail Multi-use Connector Tr Paved Road Unpaved Rd Decommissioned Road Prepared by MMWD Sky Oaks Wtrshd HQ GIS Sources: MMWD, Bay Area Ridge Trail July, 2007 Kent Peters Dam Lake
20 Legend Major Roads Public Lands Marin Municipal Water District Marin County Open Space State Lands y wa sb a le gh Hi m To Federal Lands 1 ay C r Nicasio Reservoir N i c a si o Tocaloma SP Taylor Park Streambank Stabilization Site h ulc C r i ta n k ree u La g ac em Ol D l's G e vi MMWD Lagunitas Booster Station Streambank Stabilization Site Lar sen sc ree Dixon Weir eronimo Cre San G ek k Shafter Bridge Ke Peters Dam nt La Below Peters Dam Streambank Stabilization Site ke Hig hw ay 1 Lagunitas Watershed Pacific Ocean San Francisco Bay Miles Figure 19. Streambank stabilization project sites for the Lagunitas Stewardship Plan.
21 Figure 20. Lagunitas Booster Station streambank stabilization site, on San Geronimo (eroded streambank and discharge pipe), looking upstream (top) and downstream.
22 Figure 21. Below Peters Dam streambank stabilization site; top view looking upstream towards Peters Dam, bottom view looking downstream.
23 Figure 22. Nicasio Transmission Line retaining wall bank stabilization site in Samuel P. Taylor State Park (view looking upstream).
24 Boundary Smolt Trap Nicasio Reservoir Legend Juvenile Salmonid Index Reaches Spawner Survey Reaches LG-2 Nicasio C r Platf orm Bridge Rd Nicasio Valley Rd LG-3u Tocaloma Bridge LG-5 DG-1 DG-2 Devil's Gulch Olema LG-7 Lagunitas Watershed Lagun LG-9 ita s LG SG-2 SG-1 San Geronimo Larsen Cr SG-3 Dixon Weir SG-4 Pacific Ocean San Francisco Bay Highway 1 LG-12 Peters Dam Scale = 1:60, Miles Kent Shafter Bridge Woodacre Cr. Source: USGS 7.5-minute quadrangles: Inverness, San Geronimo and Bolinas Figure 23. Juvenile salmonid survey sample sites and spawner survey reaches. Lake
25 Legend Tomales Bay Highway 1 Major Roads Public Lands Marin Municipal Water District Marin County Open Space State Lands Federal Lands Nicasio Reservoir Nicasio Cr Tocaloma Olema Lagunitas Devil's Gulch Larsen r C Dixon Weir San Geronimo Shafter Bridge Peters Dam Kent Lake Highway 1 Lagunitas Watershed Pacific Ocean San Francisco Bay Miles Figure 24. MMWD smolt trap location on Lagunitas.
26 Figure 25. Location of study reaches for California freshwater shrimp surveys in Lagunitas. (Source: Serpa 2008).
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