Civil Engineering Projects

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Herrera provides the full range of civil engineering design services to support public and private projects. We specialize in projects seeking high sustainability performance and are in complex ecological settings. Our civil engineers work closely with our planners, scientists, and landscape architects on projects across the landscape, from mine sites to urban corridors, wild rivers to neighborhood parks. We develop cost-effective solutions that are constructible, permittable, and perform as designed. We have experience working throughout the lifespan of projects from early feasibility and problem definition, concept development, planning; permitting, modeling, design, preparation of plans, specifications, and cost estimates (PS&E), construction management, and post-construction monitoring. Our engineers are thought leaders in sustainable civil engineering design. They plan and design multi-functional site and infrastructure systems to improve resource efficiency, support healthy habitat, and enhance economic opportunity.

White River at Pacific Right Bank Flood Protection Project Planning and Design

Squalicum Creek Trail Cornwall Connector

Silver Beach Creek Water Quality Retrofit

Hidden Lake Dam Removal

Pacific Lumber Stormwater Conveyance and Treatment

Leachate Pump Station Upgrades at Cedar Hills Regional Landfill

Swift Creek Sediment Management Action Plan Implementation

Julianna Park Improvements

City of Seattle Stormwater Code & Manual Update

Stateside Student Housing Development

Hawthorne Community STEAM Playground Retrofit

Port of Seattle’s Fishermen’s Terminal Redevelopment

Greywater and Rainwater Systems Design for BLOCKHouse: Homes for the Homeless

City of Marysville: Engineering for Olympic View Park Improvements

Westridge Place to Stoney Creek Way Trail Connector

Civil Engineering for Pasado’s Safe Haven Expansion

IC/ID Field Screening Guidance Manual and Training

King County Ditch Maintenance Toolkit

Municipal Construction Stormwater Site Inspection Toolkit

Incentivizing LID Beyond Permit Requirements Guidebook

Shirley Basin Uranium Waste Pile Reclamation

Astoria Nordic Heritage Park

Mercer Island Decant Facility Retrofit

Stillaguamish Village Design

Port Angeles Landfill Stabilization

Delridge Natural Drainage Solutions

Carli Creek Restoration and Stormwater Treatment Design

Black Pine Mine Reclamation


Cedar River Corridor Planning

SR 167 Completion Habitat Mitigation and Stormwater Design

Cordata Trail to Elementary School

Albany Steet Stormwater Pond

Evaluating Stormwater Retrofit and Restoration Opportunities in the Lower-Middle Deschutes River

Chicken Creek Refuge Restoration


D Avenue Green Street Stormwater Enhancement

Community Park at Cordata

Sunset Mine and Mill Reclamation

University CSO GSI Design Project

Upper Clear Creek Habitat Enhancement

Seattle Center Campus Green Stormwater Retrofit

Interbay Landfill Gas Extraction System

River Mine Reclamation

Retrofits to Reduce Phosphorus in Stormwater

Park Place Facility Design and POST Media Development

Cedar Hills Landfill Development Alternatives

East Orchard Retrofit and Design

Lake Whatcom Stormwater Capital Program

Marymoor and Overlake Sustainable Redesign

Lower White River Countyline Levee Setback

Secret Harbor Salt Marsh Restoration

City of Roses Disposal and Recycling Upgrades


Holden Mine Remediation

Chambers Lake Stormwater Treatment Facility

Zhenjiang Sponge City Infrastructure Planning

Sinnema Quaale Trail Protection and Habitat Enhancement

Hall Creek Culvert Removal and Restoration

City of San Francisco Typical Plans and Specifications for Green Stormwater Infrastructure

Coal Creek Parkway Culvert Replacement

Forest Rose Mine Reclamation


Pullen Creek Fish Passage and Restoration Design