Laguna Creek Improvements

Updated: Mar 31

The LAGUNA CREEK IMPROVEMENTS project is located in Fremont, Alameda County, California.

Throughout Laguna Creek, there are several locations where the creek is too narrow and has the potential to flood. This project involves increasing creek capacity to handle a 100-year storm to prevent flooding.


The first phase of this project includes the construction of two new culverts underneath I-880 to allow more stormwater to flow through. The second half includes widening Laguna Creek downstream of the culverts and reinforcing a concrete box culvert.


The project was determined to be a Risk Level 1 based on the low receiving and sediment risk factors.

There is a wide variety of wildlife in the area, including the California Red-Legged Frog, California Tiger Salamander, Vernal Pool Tadpole Shrimp, Contra Costa Goldfields, Salt Marsh Harvest Mouse, California Clapper Rail, and the Western Snowy Plover.


Several environmental permits and agreements are involved including...

  • U.S. Army Corps of Engineers Nationwide Permit

  • California Department of Fish and Wildlife Stream Alteration Agreement

  • Bay Conservation and Development Commission Permit

  • Regional Water Quality Control Board Certification

  • Caltrans Encroachment Permit

Work started in 2019 and is projected to be completed in 2021. The total site area is estimated at 15.3 acres with 5.34 acres of disturbed soil area.

The Prime Contractor is Gordon N. Ball. They have a really fun project and have been responsive to SWPPP recommendations. The guys out there are always super friendly, and ask about the kinds of species on the project.


We prepared the SWPPP and are performing the SWPPP-related inspections. Brian Rosano is the SWPPP Inspector for this project. He's been with us for over 2 years now! His route is in the South and East Bay.


For more information about this project head over to their website (click here)


Fun fact: This project received a $3 million-dollar grant from FEMA to help pay for the flood capacity improvements

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