Speakers Bureau features talk on Spring Garden Retrofitting Project engineering

Geotechnical Engineer Richard Short will give a presentation on the widening and seismic retrofitting of the Spring Garden Bridge during the Speakers Bureau at Mohawk Community Resource Center, corner of highways. 89 and 79 in Blairsden. This free  event takes place tomorrow, June 20, at 5:30 p.m.

In his professional capacity, Short spent a week on the bridge observing the demolition, which was required by Caltrans as a safety precaution.

The Spring Garden Bridge project is an extremely challenging project, which widened the bridge deck and reinforced the supporting structure all while traffic was maintained on Highway 70.

The shoulders were widened from 4 feet to 19 feet, 9 inches. Three of the existing supports, called Bents, were infilled with concrete to increase their seismic resistance. Each of the seven supporting structures up to 60 feet high were widened and thickened at the top to support the new wider decks. The existing concrete decks were demolished including the steel substructure. New 60-foot long pre-cast concrete beams were placed and a new concrete deck formed. The bridge structural work was completed in 2017 and 2018. The guardrails and a high friction surface treatment are being installed with the expected completion in late June 2019. The bid for this project was $10,151,652.

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The Mohawk Community Resource Center is a service of Plumas Rural Services, and serves to enrich the lives of the residents and visitors of the surrounding communities in a friendly atmosphere. Various activities take place at the center daily.

For more information about MCRC and this event, please call 836-0446 or visit www.PlumasRuralServices.org/mcrc.