Cities’ dam, levee reports slowly trickle in

After being criticized for their lack of preparedness by a county grand jury, Peninsula cities have begun preparing reports on the safety and status of their dams and levees, to be used in the creation of an emergency plan in case of catastrophic failures.

All county cities with dams or levees in their territory are working to turn in emergency action plans by the end of the year, to prepare for flooding or earthquakes in a region that has been called “an act-of-God theme park.”

San Mateo County is bordered by the Pacific Ocean and the San Francisco Bay and contains 19 dams, five of which are considered “high-hazard,” by the California Department of Water Resources’ Safety of Dams Division.

Fifteen health care facilities, 27 schools, 109 city- or county-owned critical facilities and 76 bridges or interchanges lie in county areas at risk for inundation in the event of a dam failure.

Once the reports are gathered by the grand jury, the San Mateo County Office of Emergency Services and Homeland Security will receive the collection and coordinate a countywide emergency plan.

“We need action taken by the end of the year,” said Lt. Murray Randleman. “We can’t obviously replace all the dams and levees right now, so this part is just getting the emergency contacts and plans together.”

On Sept. 4, Foster City approved their report for the grand jury. The Belmont and San Mateo city councils will look at theirs at their Tuesday and Sept. 17 meetings, respectively. Randleman said the county’s Emergency Services Council should have theirs ready by the end of the month.

Belmont has already begun working on the next step of the project, which is to shore up any trouble spots and make sure all water-retention areas are in working condition.

The city’s only dam, at Water Dog Lake, has filled with silt since it was last dredged in the 1960s, according to Public Works Director Ray Davis. While it is not nearing any overflow levels, its total capacity has been reduced by more than one-third. The dredging could cost approximately $1 million, and there may also be reinforcement work needed on the dam.

“We’re not at a level where it’s creating imminent danger of overflow, dams always have a bypass or spillway and no one has ever seen water go over,” Davis said. “We have the dam inspected annually and we’re not aware of any deficiency.”

High-hazard dams in the county

Criteria include potential for lost property or lives, age and size of the dam, as well as other seismic conditions.

» Lower Crystal Springs

» Pilarcitos

» San Andreas

» Searsville

» Crocker

» Spenser Lake

» Notre Dame

» Bear Gulch

– Source: Army Corps of Engineers

jgoldman@examiner.com

Bay Area NewsLocal

If you find our journalism valuable and relevant, please consider joining our Examiner membership program.
Find out more at www.sfexaminer.com/join/

Just Posted

U.S. President-elect Joe Biden and Jill Biden arrive at Biden's inauguration on the West Front of the U.S. Capitol on January 20, 2021, in Washington, DC.  (Win McNamee/Getty Images/TNS)
Joe Biden issues call for ‘unity’ amidst extreme partisan rancor

‘I will be a president for all Americans,’ he says in inauguration speech

MARIETTA, GA - NOVEMBER 15: Democratic U.S. Senate candidates Jon Ossoff (R) and Raphael Warnock (L) of Georgia taps elbows during a rally for supporters on November 15, 2020 in Marietta, Georgia. Both become senators Wednesday.  (Jenny Jarvie/Los Angeles Times/TNS)
Vice President Harris swears in senators Padilla, Warnock, Ossoff

New Democratic senators tip balance of power in upper legislative house

From left, Doug Emhoff, U.S. Vice President-elect Kamala Harris, Jill Biden and President-elect Joe Biden wave as they arrive on the East Front of the U.S. Capitol for the inauguration on Jan. 20, 2021 in Washington, DC. During today’s inauguration ceremony Joe Biden becomes the 46th president of the United States. (Joe Raedle/Getty Images/TNS)
Joe Biden inaugurated as 46th president as Trump era comes to an end

Todd Spangler Detroit Free Press Taking over the reins of government at… Continue reading

San Francisco City Hall is lit in gold and amber to remember victims as part of a national Memorial to Lives Lost to COVID-19 on Tuesday, Jan. 19, 2021. (Kevin N. Hume/S.F. Examiner)
San Francisco joins national COVID memorial ceremony

San Francisco took part Tuesday in the first national Memorial to Lives… Continue reading

(Allen J. Schaben/Los Angeles Times/TNS)
With executive orders, Biden to reverse Trump policies on environment, immigration

Evan Halper Los Angeles Times President-elect Joe Biden will move swiftly to… Continue reading

Most Read