From small site developments to large transportation projects and regional planning efforts, we provide interdisciplinary, technically sound services that achieve cost-effective results for our clients. We are at the forefront of technical and regulatory developments in stormwater management, including the development of innovative and low-impact development techniques for stormwater management.
Our staff has extensive experience in many of the technical fields that are key to successful low-impact development innovation and implementation. Working with clients ranging from small land developers to large public agencies, Herrera has established a strong record of successfully integrating the following areas of expertise to low-impact development objectives:
- Evaluation of stormwater management options and costs
- Watershed assessment
- Civil engineering design
- Environmental permitting
Public policy and code development- Performance monitoring
Key Projects
- Low Impact Development Technical Guidance Manual published by the Puget Sound Action Team – Contributing author
- Homestead Creek Residential Low Impact Development – Hydrologic performance analysis documentation and design of single-family residential cluster development in rural Snohomish County, Washington, French Creek Properties, LLC
- Lakewood RainCatchers – Pilot project to test cost-effectiveness of rain gardens, vegetated swales, and drainage cisterns in a single-family residential neighborhood in Seattle to reduce combined sewer overflows to Lake Washington, Seattle Public Utilities
- Twin Creeks – Transit-oriented development in southern Oregon incorporating low-impact development techniques to create an environmentally friendly community and protect two bordering creeks, Twin Creeks Development Company
- Compost-Amended Vegetated Filter Strips – Pilot project for design, installation, and long-term monitoring to provide scientifically defensible justification for use of this relatively low-cost option for treating runoff and reducing runoff volume, Washington State Department of Transportation
- High Point Revitalization – Low-impact design support and hydraulic performance modeling for urban subdivision/mixed-use development in Seattle, Washington; Seattle Public Utilities
- Carkeek Park Environmental Learning Center – Design of rainwater capture and reuse system, Seattle Parks
- Thornton Creek Water Quality Channel – Hydraulic modeling to support design of natural drainage system channel to provide water quality treatment for 680 acres in the headwaters of the south branch of Thornton Creek in Seattle, Washington; Seattle Public Utilities
- Rainwise Stormwater Incentives Package – Incentives package developed for Seattle Public Utilities to encourage the use of onsite low-impact design measures that help protect infrastructure and the environment, as well as allowing customers flexibility to manage stormwater onsite and reduce their utility costs, Seattle Public Utilities