Delta Happenings
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In this issue
NEWS
ONGOING EVENTS/OPPORTUNITIES
Delta Agency Meetings
Community Events: Lighting of Mount Diablo Beacon, Delta Stories Launch, Craft Fairs
Harmful Algal Blooms
NEWS
Record Mokelumne River Salmon Run
 The East Bay Municipal Utility District reported last month that the 2024-25 fall run of Chinook salmon on the Mokelumne River has set a new record for the second year in a row.
More than 30,000 fish had been counted by Nov. 19, with hundreds more arriving daily from the Pacific Ocean to spawn. This is the largest salmon return on the Mokelumne since record keeping began in 1940, surpassing the record-setting 2023-24 total count of 28,698 Chinook with several weeks still left to go in this spawning season.
Grand Challenges in Delta Science
The Delta Stewardship Council last month released "Grand Challenges in Delta Science: Planning for Science in a Dynamic System."
"The grand challenges are intended to be a starting point for conversation among Delta scientists, communities, and decision-makers," the report states. "Indeed, the resilience of the Delta’s social-ecological system depends on all vested parties of the Delta working together to create strategies to address these challenges and prioritize tools that can advance progress."
The four grand challenges identified in the report are:
Grand Challenge #1 – Scientists and managers must anticipate a world in which environmental conditions and regulations may be fundamentally different from those faced today.
Grand Challenge #2 – Environmental change is outpacing the traditional
pace of science.
Grand Challenge #3 – Flows of scientific information remain decentralized
and poorly connected to communities and decision-makers.
Grand Challenge #4 – Other ways of knowing, especially Traditional
Knowledge, remain siloed from decision-making.
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Grant Approved for Bethel Island Land Purchase
The California Wildlife Conservation Board last month approved a $5.1 million grant to the John Muir Land Trust to help purchase 600 acres on the north side of Bethel Island, five miles east of Oakley.
The trust intends to inundate the property, Hoover Ranch, to establish wetlands and riparian woodlands.
Learn more about the WCB action on page 70 of this PDF, and more about the trust's plans here.
Isleton Chamber of Commerce to Close
The Isleton Chamber of Commerce voted in October to close by the end of the year. Read more here.
ONGOING EVENTS AND OPPORTUNITIES
Request for Proposals: NHA Branding and Marketing Plan
The Delta Protection Commission will accept proposals through Dec. 4 for creating a tourism, branding and marketing plan for the Sacramento-San Joaquin Delta National Heritage Area.
The NHA, operated by the Delta Protection Commission, is California's first and only National Heritage Area.
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Rio Vista Bridge Closure for Ongoing Repairs
A repaving project on the Rio Vista Bridge (Helen Madere Memorial Bridge) on State Route 12 just east of Rio Vista will cause a 55-hour weekend bridge closure from 9 p.m. Friday, Dec. 13, to 4 a.m. Monday, Dec. 16.
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Marine Traffic Bridge Closures in SJ County: Through Jan. 31
San Joaquin County movable-span bridges will be temporarily closed to marine traffic through Jan. 31. The bridges will be open to vehicles, but may be reduced to one lane of travel at times.
Affected bridges are the Eight Mile Road Bridge at Honker Cut Canal, the Bacon Island Road Bridge at Middle River, and the Tracy Boulevard Bridge at the Grant Line Canal.
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Isleton Bridge Scheduled for Daily Closures: Through June 30
The Isleton bridge on State Route 160 near the city of Isleton will be closed to all motorists during daytime hours into the early evening. The closures are to allow ongoing parts replacements, and mechanical and electrical control system upgrades.
River Road and the Walnut Grove Bridge will be the alternate route.
Closures will take place 6 a.m.-6 p.m. Mondays through Saturdays through June 30, 2025. Weather conditions could delay or cancel scheduled work on some days.
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DELTA AGENCY MEETINGS
Delta Stewardship Council Tunnel Hearing
The Delta Stewardship Council will hold a hearing at 9:30 a.m. Dec. 19 to hear appeals of the Department of Water Resources’ Certification of Consistency for its geotechnical
activities for the Delta Conveyance Project
See the hearing notice (PDF autodownloads).
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Not sure which Delta agency is which? This fact sheet (PDF) explains the missions and roles of the Delta Protection Commission, the Sacramento-San Joaquin Delta Conservancy and the Delta Stewardship Council.
COMMUNITY EVENTS
Dec. 7
In Ryde: Launch of the Journal of the Sacramento River Delta Historical Society. 2-4 p.m. at the Ryde Hotel, 14340 CA-160.
In Rio Vista: Delta Marina's Lighted Boat Parade. 6 p.m. 100 Marina Drive.
On Mount Diablo: Mount Diablo's Beacon will be re-lit by a Pearl Harbor survivor, supported by a Save Mount Diablo Team. A ceremony will be held at CSU East Bay's Concord Center, 4700 Ygnacio Valley Road, Concord at 3:45 p.m. Prior to the ceremony, the USS Arizona Exhibit at the Center will be available for viewing 3-3:45 p.m.
Dec. 7-8 in Rio Vista: Craft Faire at the Delta Moose Lodge. 10 a.m.-6 p.m. Dec. 7 and 11 a.m.-4:30 p.m. Dec. 8. at 11 N. Front St.
Dec. 8
In Brentwood: East Contra Costa Historical Society's Christmas on the Farm - games, youth and adult Christmas crafts, music, food, craft vendors, lighting of the windmill at dusk. Admission is free, and activity tickets are available for purchase. 11 a.m.-dusk at the museum, 3890 Sellers Ave.
In Hood: Holiday Market at the Hood Firehouse - shopping and crafts. 10 a.m.-2 p.m., 1125 Hood Franklin Road.
Harmful Algal Blooms Report
 Here are the locations as of Monday, Dec. 2, of harmful algal bloom advisories in the Delta. Click on the button below for details and updates.
Visual observation advisories: West Canal at Clifton Court Intake, Old River at Clifton Court Intake, Grant Line Canal near Old River, Old River downstream of the ORT Barrier. Advice: Stay away from algae and scum in the water. Do NOT let pets go in the water, drink the water, or eat scum on the shore. Keep Children away from algae. Do not eat shellfish from this waterbody.
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Delta Protection Commission
2101 Stone Blvd Suite 200, West Sacramento, CA 95691
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