Bay Area's First Climate Adaptation Project Could Be a North Bay Highway

State Route 37 is a vital highway connecting four North Bay counties plagued by two unrelated problems: chronic flooding during high tides and traffic congestion. Fixing the problem will set a precedent for Bay Area climate adaptation.

2 minute read

September 26, 2017, 12:00 PM PDT

By Irvin Dawid

The 21-mile highway, known as SR 37, connects the counties of Marin, Sonoma, Solano, and Napa while skirting the San Pablo Bay. It suffers two unrelated problems: flooding caused by high tides and traffic congestion.

Fixing the highway's problems "to avoid its potential loss in the next 20 years because of flooding will be our first regional foray into adapting to sea level rise — an issue that will threaten most of our shoreline infrastructure, coastal ecosystems and population centers," write University of California at Davis ecologist, Fraser Shilling, co-director of the Road Ecology Center, and Steven Moore, a civil engineer and vice chair of the State Water Resources Control Board, in this cover story for the Insight section of Sunday's San Francisco Chronicle.

Today the highway is built atop a berm, an outdated method of building roads across marshes and waterways that constricts the ability of the bay to improve water quality by filtering out pollutants, produce more fish and wildlife, and absorb floods.

Currently, some are advocating for raising the highway [$1.3 billion] in its current location, with the primary goal of increasing traffic flows, at least in the short term. Although cheaper than the bridge-causeway alternative [$4 billion], the berm approach misses the more holistic opportunities of reconnecting marshlands to the bay and taking advantage of the flood-absorbing capacity of thousands of acres of these publicly owned wetlands.

One is reminded of the catastrophic damage done by Hurricane Harvey to Houston last month, caused in part by development choices made by the city and region. Mitigating flooding by connecting the marshes to the bay by either the causeway, which would still impact marshes, or what Shilling and Moore call the North Bay Bridge, may enable the project to tap the 2016 regional Measure AA funds for wetland restoration and adaptation to sea level rise.

Tolling an option

In 2015, the congestion management agencies of the four affected counties "agreed to form a partnership ...  to develop an expedited funding, financing and project implementation strategy for the reconstruction of SR 37 to withstand rising seas and storm surges while improving mobility and safety along the route," according to the Sonoma County Transportation Authority. 

A post last May indicated they are explore financing options which reportedly include the use of tolling and public-private partnerships.

Sunday, September 24, 2017 in San Francisco Chronicle

Aerial view of homes on beach in Maui, Hawaii

Hawaii Passes First Legislation Regulating Short-Term Rentals Statewide

The new law will give counties the power to limit number or short-term rentals and convert existing short-term rental units back into long-term residential housing.

May 13, 2024 - USA Today

Entrance to a drive-through car wash at night with green 'Enter' sign.

Ohio Towns Move to Ban New Car Washes

City officials in northeast Ohio are putting limits on how many car wash facilities can open in their towns.

May 16, 2024 - News 5 Cleveland

Rail tracks on the left, rustic log-built train station painted reddish brown with a green metal roof and concrete platform on the right, evergreen forest and bright blue sky with fluffy white clouds in the background.

More Passenger Rail Coming to Montana

Planning is underway to restore a 45-year-defunct regional passenger rail line connecting southern Montana to Billings and Amtrak’s east-west Empire Builder line from Seattle to Chicago.

May 14, 2024 - 8KPAX

Apartment For Rent Sign

HUD Proposal Would Soften ‘One-Strike’ Policy

Formerly incarcerated people are often barred from publicly subsidized housing, putting them at higher risk for homelessness and recidivism.

May 20 - Truthout

Water flowing through Glendale Narrows section of Los Angeles River in Glendale, California with a concrete bridge, power lines, and hills in background.

Los Angeles County Making Progress in Stormwater Capture

During this “super year” of storms, L.A. County has successfully captured 96 billion gallons of stormwater which is enough to meet the needs of about 2.4 million people a year.

May 20 - Los Angeles Times

Aerial Texas Hill Country at sunset, with an aerial view of a highway interchange and Interstate 35 in Austin, Texas.

The True Cost of Texas Highways

An explainer of the monetary, environmental, and social costs of exuberant road building.

May 20 - KERA News

News from HUD User

HUD's Office of Policy Development and Research

Call for Speakers

Mpact Transit + Community

New Updates on PD&R Edge

HUD's Office of Policy Development and Research

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.