Temporary Emergency Drought Barrier in Delta To help slow the movement of saltwater into the central Delta and prevent contamination of water supplies in the Sacramento-San Joaquin Delta, the 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 will begin June 3, 2021. The temporary barrier will be removed by November 30, 2021.

Boating Detours Around Emergency Drought Barrier

Travel Time Estimates – South Delta (Discovery Bay to ) Travel Time Estimates – Central Delta ( to San Joaquin River) A) Route for large-mast vessels: 40 to 45 minutes from Discovery Bay C) 30 minutes from Taylor Slough or Piper Slough marinas north towards north to Old River keeping right at Frank’s Tract going north up to the False River and north up Fishermans Cut. San Joaquin River (Deep Water Channel). D) 30-40 minutes from Bethel Island marinas iansoutha 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 Georg Old River, west to Sand Mound Slough, west on Dutch Slough towards the (see note). ISL AND 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 Detours identified are subject to changes in natural flow conditions which are beyond the control of California Department of Water Resources.o M SYCAMORE N ISL AND BRANNAN-ANDRUS ISL AND Sevenmile Slough M ok el um r TWI TCHELL n e e v i ISL AND R BOULDIN R to Slough ISL AND en DECKER Threemile at ough am ISLAND Pot o Sl cr Sa WEBB BRADFORD TRACT VENICE West False River ISL AND Barrier ISL AND

Mayberry Slough r Fishermans Cut e False SHERM AN I SL AND iv River R uin B q P a ip Franks r o e M ANDEVILLE o J r Sherman a n S Tract ISL AND d Lake Sa J ERSEY lo Taylor Slough u gh Cabin Slough ISL AND BETHEL D u ISL AND tc QU IMBY h gh

u ISL AND lo Big Break Slough S 160 nd ANTIOCH ou M d n a 4 Fixed Bridge constraints: S Clearance at high tide = 15 feet

H OLLAND h g u olS p ee h S Clearance at low tide = 19 feet HO TCHKISS OAKLEY TRACT BACON TRACT ISL AND MIL Rock Slough IS

4 Old VEALE

TRACT R iver

ORW OOD TRACT WOODWARD Marina Boating detour route Indian Slough ISLAND Woodward Canal 0 10.5 2 3 4 miles

Discovery VICTORIA Bay ISL AND

More drought information is available at DWR’s Drought webpage: https://water.ca.gov/Water-Basics/Drought