Drainage and Flood Control Design
Effective drainage and flood-control infrastructure protects people, properties, transportation systems, and public investments. GUY Engineering provides practical hydrology and hydraulics (H&H), drainage, and flood-control design services that help communities manage stormwater, reduce flood risk, and build more resilient infrastructure.
Centennial Park
Our team combines technical analysis with practical field experience to develop solutions that work in real-world conditions. From a single cross-drain or storm sewer system to a major detention facility, channel rehabilitation, or bridge hydraulic study, GUY designs cost effective improvements that balance performance, constructability, environmental considerations, and long-term maintenance.
GUY has completed more than 100 bridge hydraulic studies and provides H&H and drainage services for cities, counties, Tribal Nations, state agencies, and federal clients. Our team includes two Certified Floodplain Managers and uses industry-standard tools, including HEC-RAS and HY-8, to evaluate flood elevations, velocities, conveyance, scour potential, and drainage-system performance.
Crow Creek
H&H, Drainage & Flood Control Services Include:
- Hydrology and hydraulics analysis
- Drainage area determination and runoff calculations
- Bridge and culvert hydraulic analysis and sizing
- Storm sewer design
- Detention and retention facility design
- Ditch, channel, and channel-rehabilitation design
- Flood-control and flood-mitigation improvements
- Floodplain research, modeling, and management support
- FEMA coordination and CLOMR/LOMR support
- Flood elevation, velocity, and backwater analysis
- Scour analysis and erosion-control design
- Slope stability and embankment-protection solutions
- Drainage master planning
- Regulatory and permitting coordination with qualified subconsultants
Solutions Designed for Performance and Place
Every drainage challenge is different. GUY evaluates existing site conditions, watershed characteristics, roadway or development needs, downstream impacts, floodplain requirements, and maintenance considerations to develop solutions tailored to each location. Our designs range from engineered stormwater systems and structural erosion protection to more natural, context-sensitive approaches. Depending on project conditions, solutions may incorporate turf reinforcement, stone toe protection, native vegetation, detention facilities, channel improvements, and other measures that protect infrastructure while fitting the surrounding environment.
From Analysis to Implementation
GUY’s H&H services are supported by in-house surveying, roadway and bridge design, utility coordination, and right-of-way expertise. This integrated approach helps identify constraints early, improve coordination among disciplines, and develop drainage solutions that can be efficiently incorporated into the overall project design. Whether the goal is reducing neighborhood flooding, sizing a bridge or culvert, improving a failing channel, or planning a community-wide drainage improvement, GUY delivers clear analysis and buildable solutions that protect communities today and prepare them for the future.