Project Information
The City of Petaluma and the volunteer Trestle Promenade Now Steering Committee are working to rehabilitate the aging downtown riverfront trestle as a safe, accessible, and welcoming public promenade. Current environmental permitting and Community Visioning are defining a clear path from community input to a buildable design.
This is a rare moment. The City is engaged. The community has spoken. And with your support, the Riverfront Trestle Promenade can move from a long-held dream to a project underway.
About This Project
The City of Petaluma is currently in early environmental permitting. The next step is a professional Community Visioning process — led by a nationally recognized consulting firm — that turns community input into a buildable, shovel-ready design. That process is what the current fundraising campaign is paying for.
Visit the City of Petaluma’s Historic Trestle Reconstruction Page → (opens in new tab)What happens next:
Success Stories from Similar Efforts
Napa, California — Petaluma’s North Bay Neighbor, and Best Blueprint · Population ~80,000 · Napa River (tidal slough, like the Petaluma River)
The Napa River flooded 27 times over decades, keeping property values down and the waterfront closed to public use. Napa’s riverfront was a liability, not an asset. Traditional flood-control fixes kept failing politically, until the community rejected a standard Army Corps concrete-wall design and demanded something different.
An ad hoc Community Coalition — more than 25 agencies and 400 residents, including Friends of the Napa River, the Chamber of Commerce, the Sierra Club, and downtown merchants — spent two years redesigning the flood project from scratch. The result was a set of “Living River Principles” that replaced hard walls with restored floodplains, wetlands, and natural river meanders. The plan won a 1998 National Planning Honor Award, which helped it attract funding nationwide.
The payoff: the Oxbow District, once flood-prone industrial land, is now Napa’s biggest draw — the Oxbow Public Market, CIA at Copia, hotels, and a riverfront promenade pull in an estimated 1.8–2 million visitors a year.
Napa’s river is a tidal slough just like ours, and its funding toolkit is one Petaluma could realistically follow today:
California & New York
Profiles of five precedent projects — adaptive reuses of historic railroad trestles — that inform Petaluma’s effort to convert its downtown timber-pile railroad trestle into a riverfront pedestrian promenade.
01
The closest analogue. A historic 1905 timber trestle was converted into a 340-foot pedestrian promenade by cantilevering a new fiberglass deck off the existing structure — no pile work, no in-river construction. Total cost: $2.03M. Completed ahead of schedule in ~7–8 months. This approach directly addresses the environmental permitting problem Petaluma faces with its creosote-treated piles.
Photo credit: The Publishing Group, Inc.
02
A 515-foot coastal trestle rehabilitated for pedestrians, cyclists, and equestrians. Similar structural challenges (pile rot, creosote, endangered species habitat). Used innovative helical piles and salvaged old-growth timber. Total cost: ~$2.17M, design budget $235K — a useful benchmark for Petaluma’s next procurement phase.
Photo credit: California Through My Lens
03
A complex of five historic railroad bridges being converted for active transportation. Highlights the cost of a multi-stage RFP approach, with consultant fees alone exceeding $2.1M before construction. Construction targeted for 2027, with an estimated project cost of $15–30M. A cautionary tale for delays and cost escalation.
Photo credit: Santa Cruz Works
04
A current, unresolved project mirroring Petaluma’s situation closely — same era, same creosote timber construction, same preservation-vs.-demolition debate. After 14+ years, no decision has been made. Offers a useful three-alternative framework (retrofit only / demolish and replace / retrofit plus new adjacent bridge) that Petaluma could adapt for its own analysis.
Photo credit: Local News Matters (Bay Area)
05
The most thoroughly documented railroad bridge adaptive reuse in the U.S. Much larger in scale ($38.8M total), but its nonprofit-led, public-private funding model and “don’t touch the substructure” engineering approach both apply directly to Petaluma’s situation.
Photo credit: Maurice D. Hinchey Hudson River Valley National Heritage Area
More detailed report: Precedent Project Research Report, prepared for the Trestle Promenade Steering Committee by Katherine Gregor, April 16, 2026.
