Herrera’s interdisciplinary design capabilities include traditional civil design services such as site development, solid waste, wastewater and remediation; innovative stormwater management design tailored to site-specific conditions; as well as restoration design including stream and river restoration, wetland restoration, bank stabilization and estuarine/shoreline design.
All of our designs are based on well tested engineering principles and analysis and extensive knowledge of regulations, codes, and operational considerations.
Key Projects
- Sweyolocken Pump Station Upgrade – King County
- Cedar Hills Regional Landfill Area 6 Closure Design – King County
- South and North Transfer Station Fuel System and Drainage Improvements – Seattle Public Utilities
- SR 518 SeaTac Airport to I-5/I-405 Interchange Project Hydraulic Analyses and Storm Drainage Systems Design – Washington State Department of Transportation
- Homestead Creek Residential Low Impact Development Project – Private Developer, Snohomish County, Washington