December storm damages infrastructure | January 16, 2013 | Almanac | Almanac Online |


News - January 16, 2013

December storm damages infrastructure

by Dave Boyce

The heavy rain over the Dec. 22 weekend inflicted infrastructure damage in Woodside and Portola Valley that could cost nearly $1 million to repair, officials said. There was damage in Woodside at two culverts and an equestrian crossing over Bear Gulch Creek, and in Portola Valley at the road shoulder on a short section of upper Alpine Road.

Both towns have asked for disaster relief from the governor's office through the San Mateo County Office of Emergency Services. None of the damage affects vehicle traffic, officials said.

In Portola Valley, the damage to upper Alpine Road was to the road's western shoulder along the bank of Corte Madera Creek. A tree fell over and took with it part of the shoulder, Town Manager Nick Pegueros said. The town geologist and public works director have inspected the site, and public works checks it regularly, Mr. Pegueros said.

Repairs could reach $300,000. The town "will repair it at some point in the future, but it's not a threat to life, safety or property," he added.

In Woodside, one of the damaged culverts carries water from Dennis Martin Creek under Portola Road near the intersection with Old La Honda Road; the other culvert is located near the intersection of Eleanor Drive and Stockbridge Avenue in the Woodside Heights neighborhood, just west and south of Woodside High School. Erosion compromised the shoulder of about two miles of unidentified roadway, according to a staff report.

The damaged culverts are 7 feet in diameter, Town Engineer Paul Nagengast said. The culvert along Portola Road is buried under 22 feet of earth and about 100 feet long. The town's culverts are generally made of corrugated steel and are at least 50 years old. "They probably need some attention," Mr. Nagengast said.

Town staff will be investigating alternatives to culvert replacement, including the use of plastic inserts. Staff will be bringing the Town Council a proposal for a town-wide analysis of the storm drain system.

The cost to replace the two culverts could reach $475,000, with another $112,000 to repair the equestrian crossing, $45,000 to strengthen a road shoulder, and $51,000 to remove debris, according to the staff report. "Obviously, if we can do it cheaper, we will," Mr. Nagengast said.

The damage to the culverts, he said, came not from the volume of water, but from the debris it carried. A chunk of lumber gets caught in the culvert and "the force and pressure of the water is enough to rip steel, and that's what happened," Mr. Nagengast said.


There are no comments yet for this post

Post a comment

Posting an item on Town Square is simple and requires no registration. Just complete this form and hit "submit" and your topic will appear online. Please be respectful and truthful in your postings so Town Square will continue to be a thoughtful gathering place for sharing community information and opinion. All postings are subject to our TERMS OF USE, and may be deleted if deemed inappropriate by our staff.

We prefer that you use your real name, but you may use any "member" name you wish.

Name: *

Select your neighborhood or school community: * Not sure?

Choose a category: *

Since this is the first comment on this story a new topic will also be started in Town Square! Please choose a category that best describes this story.

Comment: *

Verification code: *
Enter the verification code exactly as shown, using capital and lowercase letters, in the multi-colored box.

*Required Fields


Meet the winners!

The results are in. Check out The Almanac readers' favorite foods, services and fun stuff in the area.

View Winners