Iron Horse Vineyards Off-Channel Habitat Enhancement

Green Valley Creek is a large tributary to the Russian River, with a drainage area of approximately 31 square miles above the project site. The Iron Horse Vineyards property is one of the largest single-owner properties on lower Green Valley Creek in west Sonoma County, and has provided a unique opportunity to create large, flooded…


Green Valley Creek Dam Removal

In the summer of 2019, PCI’s construction crew removed a channel-spanning concrete dam on Lower Green Valley Creek at Iron Horse Vineyards in Sebastopol, CA. Green Valley Creek is a major tributary to the Russian River and has historically provided critical spawning and rearing grounds for coho salmon. However, coho populations have declined due to…


North Sonoma Mountain – Assessment and Planning

PCI prepared an ecological resources assessment for this spectacular 821-acre property in 2013. Now, we are assisting Sonoma County Regional Parks in preparing plans for public access to, and resource management of, the diverse forests and scenic grasslands of this landmark location.


Sonoma Developmental Center – Ecological and Recreational Resources Assessment

The Sonoma Developmental Center is a 900-acre state-owned facility in Glen Ellen, California proposed for redevelopment. The site has provided valued services to the developmentally disabled for a century, is beloved by the local community for recreation, hosts a key pinch point in a regional wildlife corridor, and is located in an area of highly…


Kelly Creek Park Design

PCI has prepared a conceptual design for proposed parkland along Kelly Creek in Petaluma. This 44-acre property will expand on the popular Helen Putnam Regional Park in Petaluma. The land had been proposed for housing by property owner Davidon Homes. However, thanks to community efforts led by the nonprofit Kelly Creek Protection Project, the site, which…


Private Pond Design Build

PCI designed and constructed a 5.5 acre-foot swimming pond and its surrounding landscape on a private ranch on Sonoma Mountain. The design included a habitat-friendly natural shoreline comprised of emergent wetland, seasonal wetland, and wet meadow habitats. The project also includes a newly constructed embankment, spillway, pond liner, underwater habitat structures, boathouse, docks, footbridge, paths,…


Sonoma County Fine-Scale Vegetation Map  

PCI assisted Tukman Geospatial and partners from California Department of Fish and Wildlife and the California Native Plant Society in developing a state-of-the-art fine-scale map of Sonoma County’s 1.1 million acres. This 5-year project was led by the Sonoma County Agricultural Preservation and Open Space District and was completed in 2017. Describing and mapping the…


Fitch Mountain Park and Open Space Preserve

The City of Healdsburg took ownership of Fitch Mountain in November 2017 and will be operating and maintaining the property as a public park and open space preserve. The soon-to-be open Fitch Mountain Park and Open Space Preserve (Preserve) is a 173-acre property that encompasses the entire 991-foot peak of Fitch Mountain and most of…


Mill Creek Dam Fish Passage

Mill Creek is a major tributary to the Russian River and harbors some of the best habitat for coho salmon and steelhead trout in the watershed. Fish access to 11.2 miles of excellent spawning and rearing habitat was severely blocked for decades by a 5-ft tall concrete flashboard dam that the National Marine Fisheries Service…


Lower Ten Mile River Salmonid Habitat Enhancement

In 2013, PCI began working with The Nature Conservancy (TNC) to plan and design projects to improve salmonid habitat value in the lower 1.7 miles of the South Fork Ten Mile River and 4.5 miles of the mainstem Ten Mile River in Mendocino County, California. The general premise compelling the Project is that off-channel rearing…


Wishon Quarry and Crane Valley Dam Restoration

In 2012, PG&E completed a seismic retrofit at Crane Valley Dam, the embankment that forms Bass Lake, a popular US Forest Service recreational area. A project-specific quarry was developed adjacent to the site on USFS property to supply the project. To restore both the 8-acre quarry site and the 32-acre stockpile and processing areas, PCI…


Green Gulch Enhancement Project

Green Gulch Creek is a tributary to Redwood Creek in Marin County, one of the last streams south of Lagunitas Creek with a remaining wild run of coho salmon. The San Francisco Zen Center operates a meditation center and one of California’s oldest continuously certified organic farms on the property. Historic realignment and hardening of…


Pond, Stream, and Native Revegetation Design/Build

PCI enlarged and enhanced an existing farm pond to create extensive habitat for native aquatic species as well as recreational features in the Sonoma Valley. PCI’s landscape architects developed sound, effective riparian and wetland restoration methods that also blend into the surrounding landscape and are aesthetically pleasing. The creek restoration included design and reconstruction of…


Stuart Creek Dam Modification and Fish Passage Improvements

PCI designed and provided construction oversight on three fish passage improvement projects on Stuart Creek, a tributary to Sonoma Creek outside of the town of Glen Ellen, for Sonoma Land Trust. Stuart Creek is a fairly steep, cobble and boulder bed stream with high sediment transport potential. Three man-made partial or total fish passage barriers…


Taylor Mountain Regional Park and Open Space Preserve Master Plan

Taylor Mountain Regional Park and Open Space Preserve is a 1,089-acre site in east Santa Rosa opened for public use in 2013, and distinguished by rich and varied wildlife habitat and panoramic views of the Santa Rosa Plain. PCI was retained by RRM Design Group to assist with preparation of a Master Plan for the…


Thomas Creek Ranch Salmonid Enhancement Design

The residents of Thomas Creek Ranch offered to host a salmonid habitat enhancement project along their stretch of lower Green Valley Creek, a tributary to the Russian River. In cooperation with the Gold Ridge Resource Conservation District and a Technical Working Group for the creek, PCI developed conceptual and construction plans to provide winter rearing…


Jenner Headlands Preserve Public Access

PCI was retained by the Wildlands Conservancy and Sonoma Land Trust for planning and design of initial public access features for this 5,630-acre Preserve. The project involves the creation of a trailhead parking lot off Highway 1 north of Jenner, ADA-accessible restrooms and day-use area with picnic tables, ADA compliant access road and trail to…


Laguna Wetlands Preserve Restoration and Management Plan

PCI prepared the Laguna Wetlands Preserve Restoration and Management Plan for the City of Sebastopol. This Preserve lies at the edge of Sebastopol, where it is heavily used and highly valued by the public. It also encompasses highly valuable ecological and scenic resources and is protected by conservation easements. Management challenges on the Preserve include…


Presidio Trust Wetland Restoration

The Presidio Trust Wetland Restoration project will restore and create 8 acres of creek, freshwater wetlands, and brackish marsh at three sites within the Presidio of San Francisco, providing mitigation for impacts on wetlands from runway safety improvements at San Francisco International Airport. PCI coordinated approvals between two landowners—the Presidio Trust and Golden Gate National…


Pit River Spoils Piles Revegetation

As part of PG&E’s federal relicensing process for their Pit River hydroelectric facilities in Shasta County, PCI designed and implemented revegetation of over 20 acres, including three spoils piles, along the river. The sites include montane coniferous forest, oak woodland, and riparian habitats. The spoils themselves are very steep rock piles placed decades ago. Although…