Service Area
Stormwater & Drainage Engineering
Drainage studies, stormwater management reports, detention and retention pond design, and culvert and channel hydraulics for development and infrastructure projects.
Practical Drainage Solutions, Defensible Analysis
Stormwater and drainage engineering sits at the intersection of regulatory compliance and practical design. Getting it right means understanding both the hydrology of a site and the permit requirements that govern how runoff must be managed — whether that's a local drainage ordinance, a state stormwater permit, or a FEMA floodplain standard.
Creel Flood & Stormwater Engineering provides drainage analysis and stormwater design services that support development projects from early feasibility through final permitting. We work directly with developers, civil engineering firms, and municipalities to deliver technically sound, permit-ready deliverables.
Stormwater & Drainage Services
Hydrologic Analysis
Rainfall-runoff modeling using HEC-HMS, TR-55, and rational method approaches to quantify peak flows and runoff volumes for design storm events.
Stormwater Management Reports
Comprehensive stormwater reports documenting pre- and post-development hydrology, drainage design, and regulatory compliance for permit submittals.
Detention & Retention Pond Design
Sizing and routing analysis for detention and retention ponds to meet peak flow attenuation requirements and water quality standards.
Basin Delineation & Routing
Watershed and sub-basin delineation, time of concentration analysis, and hydrograph routing to accurately characterize drainage patterns.
Culvert & Channel Hydraulics
Hydraulic design and analysis of culverts, swales, ditches, and open channels using HEC-RAS and standard design methods.
Drainage Impact Studies
Assessment of downstream drainage impacts from proposed development, including capacity analysis of existing conveyance systems.
Common Project Scenarios
Stormwater and drainage requirements come up across nearly every type of land development and infrastructure project. We regularly support clients with:
- Residential subdivisions and master-planned communities
- Commercial and mixed-use development sites
- Road and highway drainage design
- Infill development with limited stormwater management space
- Drainage studies for rezoning and entitlement applications
- Retrofit stormwater management for existing developed sites
- Culvert replacement and upsizing for capacity improvements
- Stormwater permit compliance reviews and documentation
Supporting Civil Engineering Teams
We frequently serve as a drainage subconsultant to civil engineering firms that need specialized hydrologic and hydraulic analysis. We can take on the drainage study, stormwater management report, or pond sizing while your team handles grading, utilities, and site layout.
Our deliverables are formatted to integrate cleanly into your permit submittals, and we coordinate directly with reviewing agencies when needed.
Discuss your projectHave a stormwater or drainage need?
We serve clients in Texas and Florida and work as a primary engineer or specialist subconsultant on drainage and stormwater projects of all sizes.