Temporary Emergency Drought Barrier in Delta Faced with potentially insufficient water supplies to repel salinity in the Sacramento-San Joaquin Delta, the California Department of Water Resources (DWR), in consultation with federal and state water and wildlife agencies, is moving to install an emergency, temporary rock barrier across a Sacramento-San Joaquin Delta channel. In-water work is expected to begin on or about May 7, 2015. The temporary barrier will be removed in November, 2015. Boating Detours around Emergency Drought Barrier Travel Time Estimates– South Delta (Discovery Bay to San Joaquin River) Travel Time Estimates– Central Delta (Bethel Island to San Joaquin River) A) Route for large-mast vessels: 40 to 45 minutes from Discovery Bay north C) 30 minutes from Taylor Slough or Piper Slough marinas north towards to Old River keeping right at Frank’s Tract going north up to the San False River and north up Fishermans Cut. Joaquin River (Deep Water Channel) D) 30-40 minutes from Bethel Island marinas south to Sand Mound Slough, B) Route for smaller vessels: 40-50 minutes from Discovery Bay north to west on Dutch Slough towards the San Joaquin River pastTYLER Big Break Georgiana Old River, west to Sand Mound Slough, west on Dutch Slough towards the (see note). ISLAND San Joaquin River past Big Break (see note). R Note: Maintain course as far north as possible in main channel of Dutch Slough going past Big Break. ne 5 mile-per-hour limit on both Sand Mound Slough and Dutch Slough. 12 um RIO VISTA el k o Detours identified are subject to changes in natural flow conditions which are beyond the control of California Department of Water Resources.M SYCAMORE N ISLAND BRANNAN-ANDRUS ISLAND Sevenmile Slough M ok el um r TWITCHELL n e e v i ISLAND R BOULDIN R to Slough ISLAND en DECKER Threemile at ough am ISLAND Pot o Sl cr Sa WEBB BRADFORD TRACT VENICE West False River ISLAND Barrier ISLAND Mayberry Slough r Fishermans Cut e False SHERMAN ISLAND iv River R uin B q P a ip Franks r o e MANDEVILLE o J r Sherman a n S Tract ISLAND d Lake Sa JERSEY lo Taylor Slough u gh Cabin Slough ISLAND BETHEL D u ISLAND tc QUIMBY h gh u ISLAND lo Big Break Slough S Sheep Slough 160 nd ANTIOCH ou M d n Jersey Island a 4 Fixed Bridge constraints: S Clearance at high tide = 15 feet HOLLAND Clearance at low tide = 19 feet HOTCHKISS OAKLEY TRACT BACON TRACT ISLAND MILDRED Rock Slough ISLAND 4 Old River VEALE TRACT PALM TRACT ORWOOD TRACT WOODWARD Marina Boating detour route Indian Slough ISLAND Woodward Canal 0 0.5 1 2 3 4 miles Discovery VICTORIA Bay ISLAND More drought information is available at DWR’s Drought website: Information about emergency drought barrier is available here: http://water.ca.gov/waterconditions/waterconditions.cfm http://www.water.ca.gov/waterconditions/emergencybarriers.cfm.