NCDEQ-compliant stormwater management and Stormwater Control Measure (SCM) design across North Carolina. From bioretention cells to wet ponds to regional detention, we deliver complete stormwater packages that satisfy every jurisdictional standard and every watershed classification.
Stormwater is where projects get delayed, budgets get blown, and permits get denied. It's also where three decades of engineering discipline pays off, the difference between a design that clears review on the first pass and one that comes back with 40 comments.
Our team provides full stormwater engineering services across North Carolina, from early drainage concepts through sealed stormwater reports and construction-phase certifications. Every design meets NCDEQ, local, and watershed-specific standards, with hydrology models calibrated to the correct storm events and SCMs sized to the correct water quality volume.
Nine integrated deliverables covering every aspect of stormwater engineering from concept to construction.
Site-specific water quality volume calculations per NCDEQ standards, accounting for built-upon area, impervious coverage, and watershed classification.
Bioretention cells, wet ponds, extended detention, dry detention, sand filters, level spreaders, and combined systems, sized and detailed for NCDEQ approval.
Full SCS methodology for drainage areas, curve numbers, time of concentration, and peak flows. Pre- vs post-development analysis for 1-, 2-, 10-, 25-, and 100-year storms.
Rational method storm sewer sizing, Manning's equation pipe design, inlet spacing, gutter spread analysis, and junction loss calculations.
Stage-storage curves for detention basins and SCMs, outlet structure design, riser/weir sizing, and full hydrograph routing through the SCM system.
Riser structures, orifice plates, weirs, emergency spillways, underdrain systems, and trash racks, sized for the required drawdown time and designed for constructability.
Comprehensive stormwater reports meeting NCDEQ and local submittal requirements, narrative, calculations, drainage area maps, stage-storage tables, and certifications.
Downstream analysis studies required for projects discharging to sensitive waters or exceeding impact thresholds. Documented per NCDEQ and local requirements.
Engineer-of-record SCM certifications, as-built stormwater inspections, and compliance letters for NCDEQ and local jurisdiction closeout requirements.
North Carolina has some of the most restrictive protected watershed rules in the Southeast. We have active experience in all of them.
High Point, Greensboro, Archdale service areas
Chapel Hill, Carrboro, Burlington, Alamance
Raleigh, Durham, Wake County, Granville
Wake, Johnston, Wayne County regulated areas
Our Certified Floodplain Manager credential brings specialized expertise in flood hydrology, base flood elevation analysis, and NFIP compliance that most civil firms don't have.
Our stormwater packages are built to clear review on the first pass, calibrated models, thorough narratives, and the right supporting calculations before the review engineer asks.
Active experience with stormwater standards across 17+ NC jurisdictions, each with their own quirks, submittal requirements, and preferred SCM types.
Whether you need a quick feasibility check or a complete permit submittal, we can help.