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Expert stormwater design by RSP Engineers ensures effective drainage and management for your project.
RSP Engineers delivers sophisticated storm drainage design solutions to protect properties, communities, and the environment from the challenges of excess water. We engineer innovative and efficient stormwater management systems that prevent flooding, ensure regulatory compliance, and promote sustainable water practices. From master planning to detailed design, we create systems built to withstand the elements.
Effective stormwater management is more than a regulatory requirement—it's a critical component of responsible Engineering Land Development. We design customized drainage systems that are both effective and cost-efficient, addressing the unique hydrological conditions of each site.
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Our services encompass all facets of stormwater conveyance, storage, and treatment. Our capabilities include the following:
Meeting water quality standards is paramount. We design systems that effectively remove pollutants from stormwater runoff before it enters natural waterways.
Best Management Practices (BMPs)
Implementing proven BMPs and Low-Impact Development (LID) strategies to filter and treat stormwater.
Permitting for Storm Drainage Systems
Our team has extensive experience securing stormwater-related permits from local, state, and federal agencies. We manage the complex application and review process to keep your project on track.
RSP Engineers specializes in preparing and securing Stormwater Environmental Resource Permits (ERP) for projects across the US. Our team designs effective stormwater management systems—such as retention ponds, exfiltration trenches, and treatment swales—to meet water quality and quantity requirements. We handle the full permitting process with water management districts and local agencies, ensuring timely approvals and regulatory compliance for both new developments and redevelopment projects.
Residential communities, Commercial property, Mixed-use development, Industrial, Data centers, Stormwater drainage and pump stations, City and municipal, County government, Parks and recreation.
For data center sites, the same scope is organized by question, with RSP Engineers' published guides on each:
Tell us about the project — the site or property, the type of development, its stage, and what you need storm drainage design for — and we will come back to you about scope and next steps.
Commercial site floods after storms: who fixes the drainage? — which professionals handle a flooding site, and what a stormwater assessment involves.
Stormwater storage is one of the constraints a layout has to be designed around rather than fitted to afterwards, which is why it is one of the constraints RSP Atlas tests every configuration against. See RSP Advantage.
Case study
Dayton, OH
RSP Engineers completed full civil engineering design and site investigation for a 288-unit townhome residential development in Dayton, Ohio, including drainage, utilities, and site layout.
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Case study
Dayton, OH
RSP Engineers delivered full civil engineering design and site investigation for a 312,000 SF commercial development in Dayton, OH, including carwash, gas station, and site access planning.
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Case study· Engineering for Stormwater Management
Frisco, Texas
An occupied senior living campus in Frisco had drainage that no longer performed as designed. RSP assessed existing conditions, researched the permit record, modelled the stormwater system and designed a collection and regrading scheme approved for construction by the City of Frisco.
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Case study· Engineering for Stormwater Management
Fort Bend County, Texas
An established residential community in Fort Bend County had drainage its existing system was not resolving. RSP assessed conditions, researched permits, modelled the system and designed two trapezoidal channels and a collector pipe working back from a fixed tie-in invert, approved for construction by Fort Bend County.
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Case study· Engineering Robust Industrial Solutions
Medley, Florida
A seven-acre industrial site in Medley was entirely impervious before redevelopment. The stormwater design cut impervious cover to 87.7 per cent, created a 0.447-acre retention area and more than quadrupled underground detention, and was approved by the Town of Medley, Miami-Dade County and Miami-Dade DERM.
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Case study· Engineering Robust Industrial Solutions
Palmetto, Florida
A 1.47-acre industrial infill site in Palmetto was developed as a mobile batch concrete yard with a service shop. Stormwater is held in 1,418 feet of exfiltration trench under the yard rather than in a pond, and the project carries both Manatee County final site plan approval and a Florida DEP permit for its wastewater system.
Read case study →When a site's runoff has to be conveyed, stored and treated to meet the water-quantity and water-quality requirements that apply before a permit will issue. In practice that covers most new development, and redevelopment that adds impervious area or changes grading.
Hydrologic and hydraulic modeling, the drainage design itself - inlets, pipes, outfall, and retention or detention - floodplain analysis where it applies, and the drawings and calculations the reviewing agency needs for the permit.
It depends on the site. Typically the municipality or county, the drainage authority or water management district that controls the receiving system, and the state environmental agency. Work in or near a regulated floodplain also has to satisfy FEMA and local floodplain rules.
Yes. A project in or near a regulated floodplain needs floodplain analysis and, depending on the jurisdiction, compensatory storage or other mitigation before it can be permitted. That analysis is done early, because it can change the layout and the finished floor elevations.
Exfiltration, infiltration or underground storage are the usual alternatives to an open pond on a space-constrained site. Which of them works depends on measured soil permeability and on the depth to groundwater, so the geotechnical data comes first.
Yes. Many jurisdictions require an existing system to be inspected and recertified on a set cycle. We inspect the inlets, pipes, control structures, pond and outfall, document the condition, and prepare the recertification the municipality asks for.
Tell us the site, schedule and jurisdiction and we will confirm which disciplines and licences apply before proposing scope.