CALIFORNIA STATE EDITION
A Supplement to:
March 15 2020 Vol. I • No. 6
“The Nation’s Best Read Construction Newspaper… Founded in 1957.” Your California Connection – Debbie Hansen – 1-702-239-0348 – dhansen@cegltd.com
S&B Construction Battles Mud Pots Near San Diego By Irwin Rapoport CEG CORRESPONDENT
The power of nature, specifically plate tectonics and seismic activity, literally forced the California Department of Transportation (Caltrans) to build a 5-mi. temporary road adjacent to state Route 111 (SR-111) and install new underground infrastructure for the two-lane highway and the Union Pacific Railroad to abandon tracks and build new ones in the Imperial Valley, east of San Diego. Due to those reasons, there was an imperative need for the Caltrans $11.7 million, SR-111 Niland Geyser Mitigation Project. A natural-occurring geyser/mud pot, in existence since 1953, is moving toward SR111 and is likely to reach the highway. “As the geyser moves west and beyond the temporary road, Caltrans will then rebuild SR-111,” said Shawn Rizzutto, Caltrans project manager. “The mud pot is releasing water, carbon dioxide and hydrogen sulfide gases in low concentrations, but does not pose a health hazard from a distance. The geyser has moved slowly in the past 11 years; however, the rate of movement has increased and the geyser has already encroached on the railroad right-ofway impacting Union Pacific tracks.” To ensure the safety of residents and those interested in seismology, access to the mud pot and public site visits have been prohibited. Project Phases Phase 1 of the project had crews from S&B Engineering Inc. build a temporary road (two lanes) and install underground
The moving mud pot is affecting Caltrans and the Union Pacific Railway.
infrastructure under SR-111 to deal with the water and gases when the mud pot passes under the highway. Phase 2 is based on two elements — build the tie-ins for the temporary road when the mud pot reaches the road and when it does pass, dismantle the temporary road. Josh Bridwell, S&B’s owner, who served as the project manager, was fully aware of the challenges involved with phase 1 and is
awaiting the green light to start phase 2 to build the links to the temporary road. “It will take a couple of days,” he said. The main challenge was the fast-track nature of phase 1. “They gave us a two-week shutdown of the highway and we were working 24 hours a day with two, 12-hour shifts,” said Bridwell. “We had to grind out the hole that we were replacing with dirt in 24 hours, and
then immediately place geogrid fabric, and all the drainage with different types of aggregate and bring it up to grade.” The excavation went down 12 ft. where slotted drain pipe was installed. “It’s fragile and it had to be buried in rock,” said Bridwell. “We couldn’t run equipment on top of it until we got it up to grade to avoid crushing anything — we had see MUD page 6
SACRA AMENTO MONTHLY PU UBLIC AUCTION
PORTLAND MO ONTHLY PUBLIC AUC CTION
Saturday, April 11th, 2020 @ 8:30am 4751 Power Inn Rd., Sacramento, CA 95826
Friday, April 24th, 20 020 @ 8:30am 1501 N. Schmeer Rd., Portland, rtland, OR 97217
www.BARNONEAUCTION.com
866 - 372 - 1700