COMPLIANCE INFO_2019 - Laserfiche WebLink

Home Browse Search

2-015 -A Site Summary- Calaveras River mouth at San Joaquin River 2-015 -A Thomas Guide Location Latitude N Longitude W County: San Joaquin SF Bay and Delt 3758 121 22 USGSQuad: Stockton West NOAAchart: 18661 SACRAMENTO/SAN JOAQUIN RIVER Last Page Update: 7/1/1996 SITE DESCRIPTION: Site extends from mouth on Stockton Deep Water Channel (at G 41 opposite Burns Cutoff river mouth), about 3 miles up river to 1-5 overpass. Though urbanized, this is a biologically rich and diverse site. This seasonal river is wide and deep at mouth but narrows and shallows rapidly upstream, with margin varying from heavily ripped, revegetated levees to backyard piers to pockets of emergent marsh vegetation, berm islands and mature trees. Snags and shallows are common in this medium energy environment. SEASONAL and SPECIAL RESOURCE CONCERN Marsh and riparian vegetation zones are of"A" concern year-round. Special Status Species: During Nov-Dec modest numbers of Delta smelt(FT/SE); winter-run chinook (FE/SE) are a modest concern from mid Oct- May; Swainson's hawk (ST)and burrowing owl are on uplands upstream from mouth all year. One rare plant. RESOURCES OF PRIMARY CONCERN Vulnerable marshy margins and islands and riparian growths. Diversified aquatic community including T/E species and migrant fish. Oil film could aggravate low dissolved oxygen condition typical of this area in summer months and threaten this aquatic community. Swainson's hawk (ST)and burrowing owl nest and forage along river. Other typical marshy and riparian species: waterbirds and marsh birds. Other fauna include species using mixed vegetation type such as riverine and semiaquatic species. Habitat may be suitable for western pond turtle. In fall/winter this area has a modest occurrence of Delta smelt. There is a small salmon run in Calaveras. Juvenile and adult striped bass are typical as are warm water species. Abundant emergent and rooted vegetation is present here. The rare plant, California Hibiscus, occurs here. CULTURAL. HISTORIC, and ARCHEOLOGICAL SENSITIVITIES Contact the California Dept of Parks and Recreation - Office of Historic Preservation (Eric Allison (916) 653- 9125), and the Northwest Information Center, (Bryan Much, Sonoma State College (707) 332-1117)for specific information on historic or cultural resources in this area. KEY CONTACTS: Trustee(T); Entry/Owner/Access (E); Cultural (C); or Other Assistance(0) Type Name/ Title Organization Phone John Henderson F/W Biologist US Fish&Wildlife Service,Environmental Contam (916)414-6595 Eric Larson CA Dept.of Fish&Wildlife,Bay/Delta (707)944-5528 OEL Dab Nomellini President Central Delta Water Agency (209)465-5883 ADDITIONAL SITE SUMMARY COMMENTS: ACP 2-SF Bay&Delta 9850.1 -4 October 1,2014