I will provide stormwater calculation report, retention basin design and culvert layout

Need a stormwater calculation report, retention basin design, or culvert layout for city building permit approval? I provide civil drainage engineering packages tailored for AHJ submittal.

Services Covered:

• Stormwater Calculation Report: Hydrology analysis via Rational Method, TR-55 & TR-20 for runoff volume & peak discharge.
• Retention Basin Design: Retention pond & detention basin sizing, storage volume calcs, and outlet structure design.
• Culvert Layout & Culvert Design: Pipe hydraulics, culvert sizing, headwall details, and invert elevation profiles.
• Site Drainage Plan: Surface flow path mapping, catch basin layout, and site drainage plans for building permit approval.
• Floodplain Analysis: Catchment area mapping, flood elevation calculations, and floodplain risk assessment.
• Erosion Control & SWPPP: Sediment control layout, SWPPP narrative, and erosion control plans for city approval.
• Civil 3D Pipe Sizing: Storm sewer pipe sizing, inlet layout, and topographic drainage contour integration.

Message me before ordering to confirm your project scope!