Every acre you pavesends water somewhere.
Drainage studies, stormwater management reports, detention and retention pond design, and culvert and channel hydraulics for development and infrastructure projects.
Practical drainage.Defensible analysis.
Stormwater work sits where regulatory compliance meets practical design.
Getting it right means understanding both the hydrology of the site and the requirements of the reviewing agency, from local ordinances to state permits and FEMA standards.
Creel provides drainage analysis and stormwater design from early feasibility through final permitting, working directly with developers, civil engineers and municipalities.
Hydrologic analysis
Rainfall-runoff modeling with HEC-HMS, TR-55 and the rational method to quantify peak flows and volumes.
Stormwater management reports
Pre and post development hydrology, drainage design and compliance, documented for permits.
Detention & retention design
Sizing and routing to meet peak flow attenuation and water quality standards.
Basin delineation & routing
Watershed and sub-basin delineation, time of concentration and hydrograph routing.
Culvert & channel hydraulics
Culverts, swales, ditches and open channels in HEC-RAS and standard methods.
Drainage impact studies
Downstream impacts of proposed development and capacity of existing systems.
Pave the site.Then hold the peak.
Runoff from a paved site arrives faster and higher. Detention stores the difference and lets it out slowly, so downstream sees what it saw before.
Stormwater comes upon nearly every project.
- Residential subdivisions and master-planned communities
- Commercial and mixed-use development
- Road and highway drainage design
- Infill sites with limited room for stormwater
- Drainage studies for rezoning and entitlement
- Retrofit stormwater for existing developed sites
- Culvert replacement and upsizing
- Stormwater permit compliance reviews
Your team runs the site.We run the water.
Creel works as a subconsultant to civil engineering firms, handling the specialized hydrologic and hydraulic analysis while your team manages grading, utilities and layout. Deliverables are formatted to drop straight into your permit package.
Straightanswers.
What’s the difference between detention and retention?
Detention stores runoff and releases it slowly through an outlet. Retention holds water on site with no surface discharge for the design storm, letting it soak in or evaporate. Florida also uses wet detention: a permanent pool with a controlled outfall above it.
Which rainfall do you design to?
The rainfall the reviewing agency requires, usually NOAA Atlas 14 depths for the design storm, and local criteria where a jurisdiction has adopted its own. NOAA Atlas 15 will replace Atlas 14 as the national standard once it’s published.
Can you review another engineer’s drainage report?
Yes. Independent reviews for owners, cities and attorneys, documented clearly.
Do you design the whole site?
No. Creel focuses on the water: hydrology, hydraulics, ponds and drainage. Your civil engineer handles the rest of the site design.