Wednesday, September 3, 2014
FAIRFIELD-SUISUN, CALIFORNIA
99 CENTS

Hydroids flourish in North Bay Aqueduct

By
From page A1 | October 10, 2012 |

VACAVILLE — Small creatures called hydroids are putting a bit of a squeeze on the local Sacramento-San Joaquin Delta water delivery system.

There’s a several-inches-thick coating of the creatures inside the concrete North Bay Aqueduct pipe, with this coating extending for a quarter-mile beyond the Barker Slough pumps in eastern Solano County. This has cut the maximum amount of water that can flow through the pipe from 154 cubic feet per second to 135 cubic feet per second.

“It’s not a huge problem,” Solano County Water Agency General Manager David Okita said. “But it’s something we’d like to figure out — if it’s cost-effective to do something with it or if it’s more cost-effective just to live with it.”

So far, water officials haven’t found the answer to what they call “the biofilm problem.”

The Solano County Water Agency Board of Directors will hear a presentation on the topic Thursday. It meets at 7 p.m. at agency offices, 810 Vaca Valley Parkway.

Hydroids are plant-like animals related to jelly fish and corals. Okita said they look like tree branches a few inches long.

Shipping and ballast water has introduced numerous species to Bay Area waters since the Gold Rush, according to a U.S. Fish and Wildlife Service report.

Hydroids got a new home when the NorthBay Aqueduct opened in 1989. It is a 6-foot-diameter concrete pipe buried about 20 to 30 feet deep that delivers Delta water from Barker Slough to Fairfield, Vacaville, Vallejo and Napa. It is part of the State Water Project.

Each year, the pipe gets drained so maintenance workers can enter it through manholes, Okita said. Maintenance workers discovered the hydroids in 1999, at a time when local cities used less water. Peak water demand has now reached what the hydroid-restricted aqueduct can deliver, he said.

“That first quarter-mile (of pipe), the hydroids are feasting on whatever is in the Delta water,” Okita said. “But eventually, they eat it all up. That’s why you don’t see hydroids all the way to Napa.”

One possible way to defeat the small invaders is using chemicals, Okita said. But, since this is drinking water, there are limits to what types and what concentrations of chemicals can be used, he said.

Another possibility is running a mechanical cylinder with bristles through the pipe to remove the hydroids, he said. That method worked when attempted a few years ago. But the hydroids grew back in a couple of months, he said.

Yet another possibility is lining the concrete pipe with epoxy or teflon, Okita said. This too has a downside.

“It’s very expensive and you have to re-coat the pipeline every five to 10 years,” Okita said.

At this point, there’s no hydroid problem at other Delta pumping facilities that might give clues to a solution, Okita said.

Fairfield and Vacaville get water from both the Delta and from Lake Berryessa reservoir in Napa County.

Reach Barry Eberling at 427-6929, or beberling@dailyrepublic.net. Follow him on Twitter at www.twitter.com/beberlingdr.

Barry Eberling

Barry Eberling

Barry Eberling has been a reporter with the Daily Republic since 1987. He covers Solano County government, transportation, growth and the environment. He received his bachelors of art degree from the University of California, Santa Barbara and his masters degree in journalism from the University of California, Berkeley.
LEAVE A COMMENT

Discussion | No comments

The Daily Republic does not necessarily condone the comments here, nor does it review every post. Read our full policy

.

Solano News

Travis Heritage Center puts aircraft histories on video

By Ian Thompson | From Page: A1 | Gallery

 
Teen to be prosecuted as adult for Tabor shooting

By Jess Sullivan | From Page: A1

 
Body of Eureka soldier returns home through Travis

By Ian Thompson | From Page: A1 | Gallery

Labor Day not a holiday for everyone

By Amy Maginnis-Honey | From Page: A3, 5 Comments | Gallery

 
Labor Day breakfast introduces union-backed candidates

By Susan Hiland | From Page: A3, 2 Comments | Gallery

Pool provides last dose of summer fun in the sun

By Amy Maginnis-Honey | From Page: A3 | Gallery

 
 
Grape spill backs up commuter traffic

By Amy Maginnis-Honey | From Page: A4

 
Police chase Labor Day shots-fired reports

By Ian Thompson | From Page: A5

Rush Ranch puts out call for docents

By Ian Thompson | From Page: A5

 
College gets large biotechnology grant

By Susan Winlow | From Page: A5, 1 Comment

 
Festival of Hope returns to Vacaville

By Amy Maginnis-Honey | From Page: A5

 
SafeQuest schedules peer counseling training course

By Susan Hiland | From Page: A5

End city role at Parkway Gardens, Mraz says

By Ryan McCarthy | From Page: A5

 
He’s back: ‘Forest Gump’ returns to theaters

By Amy Maginnis-Honey | From Page: A7

 
Suisun City police log: Aug. 30, 2014

By Susan Hiland | From Page: A12

 
Fairfield police log: Aug. 30, 2014

By Susan Hiland | From Page: A12

Fairfield police log: Sept. 1, 2014

By Susan Hiland | From Page: A12

 
Suisun City police log: Sept. 1, 2014

By Susan Hiland | From Page: A12

Fairfield police log: Aug. 31, 2014

By Susan Hiland | From Page: A12

 
Suisun City police log: Aug. 31, 2014

By Susan Hiland | From Page: A12

Weather for Wednesday, Sept. 3, 2014

By Daily Republic staff | From Page: B14

 
.

US / World

Bullet-train foes seek state Supreme Court review

By The Associated Press | From Page: A8

 
Governor seeks federal aid for Napa earthquake

By The Associated Press | From Page: A8

Recovery knocks 21 fish species from watch list

By The Associated Press | From Page: A8

 
California wildfire creeps within 2 miles of homes

By The Associated Press | From Page: A8

LA man gets prison in abandoned van dog death

By The Associated Press | From Page: A8

 
Boy, 11, fights off would-be kidnapper in Azusa

By The Associated Press | From Page: A8

Double mastectomy doesn’t boost survival for most

By The Associated Press | From Page: A9

 
Attorney: Detroit needs debt plan to survive

By The Associated Press | From Page: A9

30 teens escape from Nashville detention center

By The Associated Press | From Page: A9

 
Police: Death of teen whose body burned was random

By The Associated Press | From Page: A9

Infamous speed trap town investigated over tickets

By The Associated Press | From Page: A9 | Gallery

 
PG&E penalized $1.4B for deadly pipeline blast

By The Associated Press | From Page: A9

Memo: No wrongdoing in handling child immigrants

By The Associated Press | From Page: A9

 
Mom of autistic girl pleads guilty to child abuse

By The Associated Press | From Page: A9

Syrian rebels issue demands for captive UN troops

By The Associated Press | From Page: A10

 
Pakistan lawmakers back premier amid mass protests

By The Associated Press | From Page: A10

Seismic activity calms down near Iceland volcano

By The Associated Press | From Page: A10

 
Top South America hackers rattle Peru’s Cabinet

By The Associated Press | From Page: A10

Ukrainian troops routed as Russia talks tough

By The Associated Press | From Page: A10

 
Group says world is losing battle against Ebola

By The Associated Press | From Page: A10 | Gallery

Video purports to show beheading of US journalist

By The Associated Press | From Page: A12 | Gallery

 
US strike targets leader of Somali extremist group

By The Associated Press | From Page: A13 | Gallery

.

Opinion

Police enforcement counts

By Letter to the Editor | From Page: A11

 
 
.

Living

Community Calendar: Sept. 3, 2014

By Susan Hiland | From Page: A2

 
10 ways to make life better

By Barton Goldsmith | From Page: A2

.

Entertainment

Bieber charged with assault over photo incident

By The Associated Press | From Page: A7

 
Family: Joan Rivers on life support

By The Associated Press | From Page: A7

Celebrities’ nude shots removed from some websites

By The Associated Press | From Page: A7 | Gallery

 
.

Sports

Paxton takes shutout into 8th, Mariners stop A’s

By The Associated Press | From Page: B1

 
Baalke, Harbaugh won’t tolerate domestic violence

By The Associated Press | From Page: B1

 
Carr knows being named starter just the beginning

By The Associated Press | From Page: B1 | Gallery

Armijo beats Vanden 2-0 to claim All-City boys soccer title

By Brian Arnold | From Page: B1 | Gallery

 
Picking the best of the worst for Ryder Cup

By The Associated Press | From Page: B2

Posey, Giants rally for 12-7 win over Rockies

By The Associated Press | From Page: B2

 
Questions for FSU and Alabama after opening week

By The Associated Press | From Page: B2

Following his own rules, Monfils into US Open QFs

By The Associated Press | From Page: B2

 
Seahawks stay atop AP Pro32 power rankings

By The Associated Press | From Page: B2

Broncos WR Welker suspended for 4 games

By The Associated Press | From Page: B2

 
Stanford’s O-line trying to live up to reputation

By The Associated Press | From Page: B2

NFL suspends Irsay 6 games, fines him $500,000

By The Associated Press | From Page: B2

 
Unbeaten US routs New Zealand 98-71 at worlds

By The Associated Press | From Page: B2

Tom Watson fills out his Ryder Cup team

By The Associated Press | From Page: B2

 
Prep volleyball: Vikings, Mustangs win foundation games

By Daily Republic staff | From Page: B2

 
Boone insists he will be ready for Sunday opener

By The Associated Press | From Page: B2

 
This date in sports history for Wednesday, Sept. 3, 2014

By The Associated Press | From Page: B3

.

Business

It’s no longer safe to recline your airplane seat

By The Associated Press | From Page: B7 | Gallery

 
Some fear auto industry returning to bad habits

By The Associated Press | From Page: B7

Home Depot probes possible credit card data breach

By The Associated Press | From Page: B8

 
Revel casino follows Showboat, closes its doors

By The Associated Press | From Page: B8

.

Obituaries

George H. Gollinger

By Brad Stanhope | From Page: A4, 1 Comment

 
Laurie Danielson Bailey

By Nancy Green | From Page: A4, 3 Comments

.

Comics

Dilbert

By Daily Republic Syndicated Content | From Page: B4

 
Pickles

By Daily Republic Syndicated Content | From Page: B4

Garfield

By Daily Republic Syndicated Content | From Page: B4

 
Peanuts

By Daily Republic Syndicated Content | From Page: B4

Word Sleuth

By Daily Republic Syndicated Content | From Page: B5

 
Cryptoquote

By Daily Republic Syndicated Content | From Page: B5

Crossword

By Daily Republic Syndicated Content | From Page: B5

 
TVGrid

By Daily Republic Syndicated Content | From Page: B7