Hammond Collier’s Stormwater Team has extensive experience with all levels of stormwater system planning and engineering, and has provided consulting services to municipalities and commercial developers alike. We have provided these services throughout the State of Washington. Hammond Collier’s depth and breadth of project experience ensures that our clients receive cost-effective stormwater solutions.

Services provided are as follows:

Planning

• Site Analysis
• Hydrologic Modeling
• Hydraulic Modeling
• Analysis of watershed and local drainage patterns
• Conceptual Designs
• Comprehensive Stormwater Plans
• Development of Stormwater Standard Specifications and Details
• Review and update of Drainage Ordinances
• NPDS Phase II Permitting

Traffic Engineering

• Culvert Replacements
• Retaining Structures
• Flooding Mitigation
• Natural conveyance
• Stormwater treatment facilities
• Erosion Mitigation Plans
• Habitat Restoration
• Environmental Permitting
• Landscape Architecture
• Water Quality Facilities
• Slope Stabilization
• GPS Surveys

Services

• ULID Formation
• Economic, Rate, and Feasibility Studies
• Constructions Surveillance and Management
• Right-of-Way, Construction and Property Surveys
• Funding Applications
• Loan and Grant Administration