Chigosi served as prime contractor for Department of Parks and Recreation, San Diego County, restoration project. The project is located in the heart of the Tijuana River Valley National Wildlife Refuge and Estuarine Sanctuary. This area is habitat to 370 species of birds; most notable are least Bell’s vireo and California gnatcatcher. The scope of work involved clearing and grubbing of invasive plants, layout, grading, excavation, compaction, concrete footings, and construction of an ADA access overlook deck and cable railing. We removed more than 2 acres of invasive ice plant and replaced with uplands seed mix of Coastal Sage Brush, Mule Fat, Coyote Bush, San Diego Sunflower, Golden Yarrow, Deerwood, Coast Goldenbush, White Sage, Black Sage, and other native seedlings.

Trailside Pampas Removal, Golden Gate National Recreation Area

Chigosi served as prime contractor on this four year wetland creation and restoration project for U.S. Veterans Administration. Scope of work included elimination and control of non-native invasive species, seed collection, tree and shrub installation, irrigation, and ongoing maintenance. The work entailed comprehensive identification and removal of over 30 non-native invasive plant species, such as, jubata grass (Cortaderia jubata) and pampas grass (Cortaderia selloana). Work included collecting and documenting photos and categories of invasive plants in a comprehensive weed identification booklet; four years of replanting of native plants; seeding and plugging; maintenance; irrigation repair and replacement; weed control; erosion control; and conducting quarterly monitoring and reporting. A huge volume of non-native grass, mostly Italian Ryegrass, Tocalote, Russian thistle, and pampas grass re-sprouts were removed. 

Wetlands Restoration Project, VA National Cemetery 

Dairy Mart Ponds Overlook, Tijuana River Valley 

Chigosi served as prime contractor on a U.S Department of Interior, National Park Service, ecological restoration project. The scope of work included removing jubata/pampas growing within the Rancho Corral de Tierra area of the Golden Gate National Recreation Area near Half Moon Bay, California. Activities included mechanical treatment of jubata grass (Cortaderia jubata) and pampas grass (Cortaderia selloana). The mechanical treatment consisted of using hand tools to dig up the root ball of each target weed within four treatment areas. Once the root ball was excavated, it was left on-site and turned upside-down to prevent re-rooting. No herbicide was used.

  • Project Management and Onsite Supervision
  • Engineering Consulting and Onsite Supervision
  • Environmental Engineering
  • New Construction, Renovation, and Remodel
  • Natural Resource Management


Point of Contact:
Josette Rice
President and CEO
Phone: (619) 794-0202