We've read the hydrology report. We know what the inspector checks. We build it exactly as drawn — and we've never needed a second walk.
12 years of permitted basin work across Middle Georgia. Not once have we gone back for a re-inspection.
A detention basin holds stormwater temporarily and releases it at a controlled, metered rate through an outlet structure — preventing downstream flooding from peak storm events. It holds water permanently or temporarily depending on design.
A dry retention basin captures stormwater runoff and allows it to infiltrate into the soil between storm events — the basin is completely empty between rains. Often used when soil permeability supports infiltration.
We've never needed a second walk. Not once. Not on a residential site, not on a commercial development, not in 12 years of permitted basin work in Middle and South Georgia.
Before moving a yard of dirt, we read the engineer's hydrology report in full — volume, depth, outlet sizing, invert elevations, and emergency spillway requirements. No guesswork before the machine starts.
GPS-controlled excavator bucket maintains consistent depth across the basin footprint. Spoil is stockpiled on-site or hauled off. Bottom elevation is checked with laser level against permit conditions at multiple points.
Side slopes cut to design ratio (3:1 standard, 4:1 or flatter where specified), finished with box blade. Outlet riser structure, emergency spillway, and rip-rap apron installed to plan dimensions before backfill.
Silt fence, erosion control blanket, and approved seed mix applied per the project's NPDES permit and SWPPP. Basin and disturbed areas are fully stabilized before inspection — we don't call the inspector until the site is ready.
| Parameter | Our Standard | Notes |
|---|---|---|
| Side Slope Ratio | 3:1 min (H:V) | 4:1 or flatter preferred for maintenance mowing access and long-term stability |
| Outlet Structure | Riser pipe + anti-seep collar | Skimmer outlets used on dry basins per GA EPD guidance; sized per hydrology plan |
| Emergency Spillway | Earthen or rip-rap lined | Designed for 100-year storm pass-through without overtopping berm |
| Rip-Rap Apron | Class B or C — GA DOT | Placed at all inlet and outlet pipe ends; dimensions from engineer's detail sheet |
| Erosion Seed Mix | GA DOT 700 Series | Warm-season grass mix per NPDES permit; temporary ryegrass in dormant season installation |
| Silt Fence | Class A or B — GSWCC | Installed at downslope limit of disturbance before any excavation begins |
| Check Dams | Rock or silt wattle | In concentrated flow channels as required by project SWPPP |
| Berm Compaction | 95% Standard Proctor | Lifts placed and compacted per geotechnical spec when embankment height exceeds 5 ft |
Send a quick note. We'll text within a business day to set up a free site visit. Most quotes go out within 48 hours.
