USGS

Sometime in August, contractors will implode Warren Hall at California State University, East Bay in Hayward, near San Francisco.

By Becky Oskin LiveScience

A planned demolition of a building that can't endure California's earthquakes will also help geologists better understand a fault that could have destroyed the structure.

Sometime in August, contractors will implode Warren Hall at California State University, East Bay in Hayward, near San Francisco. The 13-story building was deemed the most seismically dangerous structure in the state university system by a seismic review board. Geologists plan to use the demolition to study the Hayward Fault, which runs just below campus and is due for an earthquake as strong as magnitude 7.0.

"Hayward is the one that worries us the most," said John Evans, a seismologist with the U.S. Geological Survey's (USGS) Earthquake Science Center in Menlo Park, Calif. "It's in the midst of a heavy urban area with lots of lifelines going through it power and water, roads and communications. It would be quite devastating if one or more of the segments of that fault go."

Because the East Bay is densely populated, it's difficult for researchers to employ traditional methods to study the Hayward Fault, Evans said. Residents aren't keen on sharing their backyards with controlled explosions or open trenches that reveal signs of past earthquakes.

The demolition, which will produce shaking that mimics a magnitude-2.5 quake, offers a rare opportunity to investigate the fault, Evans said. The USGS plans several studies in collaboration with geologists and students from CSU East Bay.

Before the implosion, the USGS will set up some 500 temporary seismometers sensors that measure ground motion throughout the hills and flats east of the San Francisco Bay. The supersensitive monitors will pick up the shaking produced as the building collapses. The network will give researchers their most detailed view yet of the structure of the Hayward Fault. As the seismic waves travel through the Earth, the little hiccups caused by discontinuities such as the Hayward Fault or different geologic layers help scientists see these underlying structures more clearly.

The study will also help predict how regions of the East Bay may shake during a future earthquake. Soft sediment, such as that found in the former marshes along the bay, often shakes harder than the bedrock in the hills. The dense seismic monitoring network will help researchers detect such differences.

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Building demolition to shed light on earthquake fault

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WAILUKU - A divided Maui County Council voted down a request by Mayor Alan Arakawa's administration Wednesday to expedite a bill that would amend the current county budget to explicitly call for the demolition of the Old Wailuku Post Office after the fact in an attempt to resolve a simmering dispute between the mayor and the council.

The council's 5-4 vote shot down an effort to have the measure skip the committee review process and to proceed directly to action by the full council. The bill, instead, will be referred to the council's Budget and Finance Committee.

The Arakawa administration had drafted the bill in an effort to resolve a dispute surrounding the demolition of the building that some council members believe should be formally investigated. The dispute centers on the use of about $1.5 million for the demolition of the building and for planning of a county campus expansion when the appropriation called for the "rehabilitation" of the more than 50-year-old building that stood at the corner of Wells and High streets.

Some council members say the action of the mayor's administration could be a violation of the County Charter.

But Arakawa's administration contends that the demolition project was highly publicized and not a secret. Administration officials discussed the building's situation with council members individually and told the council's Budget and Finance Committee in 2012 that requests for proposals were going out for the demolition set for the end of 2012 and into this year, according to a more-than-200-page document provided by the administration to council members and the public.

Some council members have said that they knew the demolition was going on but did not question where the funding came from. Questions by council members about the funding came after the building was demolished early this year.

The bill to amend the budget comes as a proposed formal investigation into possible misuse of funds by the administration in the building demolition makes its way to the full council. The council's Policy and Intergovernmental Affairs Committee on Monday voted to push forward a resolution to allow for the committee to conduct a formal investigation and to call administration officials and county staffers before the panel to answer questions.

The resolution is scheduled to be heard by the full council July 5.

At a special County Council meeting Wednesday, Managing Director Keith Regan asked the council to take up the bill to amend the budget and to approve it. He said the administration would continue to work with the council "to clarify our position" after the measure was approved.

By amending the budget, Regan said that it could help the county move forward with its campus expansion plans, which call for constructing a new county building on the site of the former post office. The new building will save the county nearly $2 million a year in rent, Regan said, adding that the county currently spends $150,000 a month on rent for its offices.

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Resolution to demolition dispute shot down

Claremont The city will not sign a contract for demolition of the outdoor pool, at least until after the July 10 City Council meeting, City Manager Guy Santagate said yesterday.

Santagate said there will be a motion presented to council in July to demolish the pool and if it passes, the contract can be signed.

It is their call, Santagate said.

At the June 12 council meeting, resident Jeff Barrette questioned whether the condition of the 60-year-old pool at Veterans Park was as bad as the recreation department said it was when the council voted to keep it closed last summer.

Barrette asked the council to allow him access to the pool so he could pay for his own assessment of the condition and obtain estimates for repairs. The city said full repairs to the pool could run as high as $600,000.

Barrettes request sparked a lengthy debate among councilors, during which it became clear there was no actual motion or vote to demolish the pool. In May 2012 the council voted 7-2 to close the pool and determine costs for removal.

Mayor James Neilsen asked Santagate to delay the contract signing and Santagate said yesterday the city would adhere to that request.

During the budget review in November, the council approved $50,000 for the demolition and some councilors believe that was a clear indication that the city could proceed with demolition. Bids were recently returned and a contract awarded, but not signed, for $23,000.

At the June meeting, Councilor Chris Irish was adamant that the council never voted for demolition and he wanted to have a conversation about the options and final look of the property .

Barrette said he plans to attend the July council meeting and make his case to hold off on demolition.

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Claremont Puts Off Pool Demolition