Overview

Timmons Group’s stormwater services team consists of highly specialized staff with experience in stormwater management and public drainage solutions for local governments and private developers. Our engineers with backgrounds in civil engineering, water resources, biological systems engineering, and ecological restoration dedicate their professional careers to solving complex drainage problems and creating sustainable solutions for stormwater management.

Whether providing independent tasks for stormwater on-call contracts or supporting services for infrastructure projects, our staff is familiar with the unique complexities of a variety of projects. Our teams have completed stormwater improvement projects and emergency repairs on degraded and undersized existing infrastructure, as well as TMDL-driven retrofit and stream restoration projects.

Our teams are well-versed in infrastructure and capital project drivers, including regulatory framework and best practices that pertain to stormwater management. We can provide comprehensive project services from initial data collection (such as survey, utility location, and wetland delineation), through engineering analysis and design, construction, and post-construction inspection and monitoring services.

Stormwater Management & Public Drainage Services

Analysis & Design
• Inventory and Data Collection
• GIS mapping, analyses, and editing
• Watershed Delineation
• Hydrologic & Hydraulic Modeling (2D, SWMM, etc.)
• Drainage Improvement Design
• Water Quality Retrofit Solutions
• Green Infrastructure Engineering and Design
• Easements and Property Acquisition Services
• Construction Cost Estimates, Technical Specifications, Bidding Assistance
• Construction Administration
• Construction Materials Testing

Floodplain Management
• Floodplain Studies
• Mapping & Analysis
• FEMA Assistance
• NFIP and CRS Assistance

Stormwater Regulatory Compliance & Support
• VSMP and MS4 Program Development and Planning
• Ordinance Development and Council/Board Liaison Services
• Policies and Procedures
• Plan Review and Inspection Services
• Data Management
• Public Outreach and Education
• TMDL Action Planning and Compliance Strategies

Dam Safety & Impounding Structures
• Inspections & Reports
• Dam Failure Analyses & Inundation Studies
• Emergency Action Planning

Ecological Restoration
• Stream & Wetland Restoration
• Living Shorelines
• Bluff Stabilization

Projects

Raleigh Stormwater On-Call Drainage Assistance Program
Town of Cary Stormwater On-Call Contract
Wooten Meadow Park
Raleigh Trail/Greenway Connections
Fauquier County Central Sports Complex
Norfolk Highlands Area Drainage Study
Sedgefield Elementary School Urban Bioretention
Lake Carroll Dam Safety Project
Northern Virginia On-Call / Term Contract Experience
Edinburgh Parkway
The Landing at Silver Spring
Mulberry Run BMP Retrofit