Harrison Engineering Inc.

Engineering for Public Works

Home Services Projects Creeks Municipal Interchange Highway References Employment Opportunities Links Harrison Engineering Inc. Corporate Office 399 Taylor Blvd., Suite 100 Pleasant Hill, CA 94523 (925) 691-0450 (phone) (925) 691-0460 (fax) Marin Office 801 D Street San Rafael, CA 94901 (415) 524-4994 randell@harrison-engineering.com Questions/comments about the site? Please e-mail

Municipal Projects Concord Boulevard Bicycle and Pedestrian Gap Closure Projects (City of Concord): Harrison Engineering was the project coordinator and civil designer for this multi-phase sidewalk gap closure project. HEI developed the phased concept plan approach, cost estimates, and assisted with preparation of the grant applications, environmental documents, right of entry, and coordinated all of the Local Assistance paperwork for the project. Construction of Phase 1 of the project, between Farm Bureau Road and Sattler Drive is complete. The contractor’s bid was is $609K, $500 below the Engineer’s Estimate. Harrison Engineering was selected for the design of Phase 2 of the project, which is complete. The project funding includes federal money administered through Caltrans Local Programs. HEI led the team for the Environmental Studies as well as the design. HEI performed the Visual Impact Studies, Parking Studies, and Location Hydraulic Study and coordinated the Section 106 Studies and Section 4(f) Study as required for the NEPA document. Cosmo/Monterey Road Sanitary Sewer Relocation (Morgan Hill): This $700,000 sanitary sewer relocation project, involved reversal in the direction of flow in several residential streets to allow the abandonment of the main along Llagas Creek for a future flood control project. The project involved over 35 service lateral connections, traffic handling plans, utility coordination and construction of mains from 6 inch to 15 inch diameter. Moretti Drive Drainage Improvements (Concord): This project corrected a localized flooding problem, which caused storm water from the Concord Naval Weapons Station to enter private property and flood several residences. The report for the project involved a hydrology study of the upstream area, detention basin routing, hydraulic grade line calculations, and recommendations to the City for improvements. The design involved construction of a masonry flood wall, supplemental culverts, new drainage inlets and modification to existing inlets. Empire Avenue (Oakley): This project involved design of frontage improvements for a missing segment of Empire Avenue in the City of Oakley. Project involved design of curb and gutter, sidewalk and widening to accommodate an additional lane of traffic. L Street Pedestrian Improvements Under State Route 4 (Antioch): This project involved the design of a concrete retaining wall, sidewalk, curb and gutter under the existing SR4 bridges to replace the existing non-ADA compliant sidewalk. Project involved environmental documents, encroachment permits and geotechnical investigation. Staging plans were required to allow pedestrian access at all times. Utility coordination was required to pothole at potential conflict locations and make necessary adjustments. Project funding was administered through Caltrans Local Programs. Other Municipal Projects Include: · Bethel Island Bridge Sewer Force Main Relocation – Ironhouse Sanitary District · Districts Way Undercrossing at BNSF Railway – Ironhouse Sanitary District · O'Hara Ave Widening-Nutmeg to Laurel – City of Oakley · Ascot Drive at Moraga Road Intersection Improvements – Town of Moraga · Port Chicago/Bates Avenue Intersection Improvements – City of Concord · Galindo Creek Trail – City of Concord · Broadway Ave. Traffic Calming and Rehabilitation – City of San Pablo · Heights Elementary SR2S – City of Pittsburg · Del Mar Middle School Safe Routes to School Project – Town of Tiburon · Tiburon Non-Motorized Transportation Pedestrian Project – Town of Tiburon · Lyford Dr. Parking Lot Project – Town of Tiburon · W. El Pintado Roadway Repair – Town of Danville · Diablo Road Bridge Slope Repair – Town of Danville · Livermore Valley Preserve Wetland Grading Plan · Oakley Municipal Parking Lot – City of Oakley · Corliss Drive Sidewalk Improvements – Town of Moraga