When it rains, we pour on technology mastery and innovative solutions for water challenges.

RESPEC’s professional  engineers specialize in stormwater and drainage engineering solutions for the urban environment. Our team designs and prepares construction plans for projects ranging from small, remedial drainage needs to major channel restoration. We deliver innovative techniques to convey runoff and reduce runoff volumes and pollutants while helping clients meet local, state, and federal requirements. Career experts in the fields of urban watershed hydrology, hydraulics, and water quality, the RESPEC team has successfully completed and delivered over 500 urban watershed projects.

RESPEC’s water-resource engineers specialize in hydrology and hydraulics planning and design services. Our projects cover the full spectrum of needs, from small stormwater analyses to multimillion-dollar design and construction projects. We perform hydrologic and hydraulic modeling by using SWMM, HEC-HMS, HEC-RAS, Flo-2D, and many other programs. RESPEC is adept at designing infrastructure in urban settings; we factor in public safety, property protection, channel stability, construction costs, multiuse potential, floodplain impacts, environmental constraints,  and  stakeholder concerns.

Experienced in watershed-level best management practice (BMP) planning and designing site-specific water quality BMPs, RESPEC can deliver any type of stormwater BMP design and construction-management service that may be required.  Our stormwater design projects culminate in construction drawings and specifications that provide integrated, cost-effective, and practical solutions that help our clients to protect surface water and groundwater quality.


    • Stream Restoration
    • Detention and Water Quality
    • Stormwater Master Planning
    • Floodplain Management
    • Bridge Scour Assessment
    • Transportation Drainage
    • Drainage Design
    • Trails

Urban Stormwater projects

Learn more about related projects where RESPEC has proven our expertise in this area.

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Aspen Rio Grande Park Stormwater Improvements

Engineering a water quality treatment facility at Rio Grande Park while ensuring that the park provides an aesthetic environment for visitors.

Best Management Practices Tracking

Tracking stormwater best management practices using mapFeeder™.

Big Sioux Water Quality Trading Project

Assessing the sediment and bacteria impairments in the Central Big Sioux River Watershed and reducing pollution through a water quality trading.

Coal Creek Rock Creek Master Plan

Accelerating major drainageway planning studies in Colorado.

Dead Run Stream Restoration

Assessing channel conditions in Dead Run Stream and designing stream improvements through McLean Central and Dead Run Stream Valley Parks.

High Line Canal

Developing practical solutions for repurposing the High Line Canal for collecting and treating stormwater runoff.

Piney Creek Major Drainageway Plan

Mitigating severe channel degradation, erosion, and heavy sediment deposition in the Piney Creek drainageway.

SARA Water Quality Modeling Tool Development

Developing software tools to facilitate watershed modeling and planning in San Antonio River Authority’s (SARA) watersheds.

SWMM Stormwater Planning Plug-In for Open Planning Tools

Creating new tools for computing stormwater runoff in urban areas.

SWMM/EPANET User Interface Reengineering

Updating software user interface that is designed to manage input data, drive specialized simulations, and analyze output data that are user-friendly.
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Urban Stormwater products

RESPEC’s product line is geared towards making businesses and organizations better, faster, smarter, and safer. Our products benefit clients in need of greater efficiency, accuracy, and cost savings.

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BASINS integrates environmental data, analysis tools and watershed and water quality models to assist in managing watersheds and developing Total Maximum Daily Loads (TMDLs).


HSPEXP+—An Enhanced Expert System for Calibration of HSPF.

Hydrologic Simulation Program‑FORTRAN (HSPF)

Hydrologic Simulation Program‑FORTRAN (known as HSPF) is an analytical tool that has applications in planning, designing, and operating water-resources systems. 

Hydrologic Simulation Program–Python (HSP2)

RESPEC’s Hydrologic Simulation Program–Python (HSP2) model uses modern technology to improve upon its predecessor Hydrologic Simulation Program–FORTAN (HSPF) model.
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Rick Moser, PE
Vice President, Water & Natural Resources