CONCEPT #58 OF 100 · Inspection, Appraisal & Clean Energy · LAYOUT: inspection_checklist
Civil Engineering Stormwater Hydrology, TR-55 Runoff & Detention Basin SWPPP Study
Standard / Reference: Clean Water Act § 402 NPDES · USDA NRCS TR-55 Method · Municipal MS4 Stormwater Ordinance
Why professionals use this template: 8,900/mo search demand: civil engineers and site developers needing pre- vs. post-development peak discharge tables (2-yr, 10-yr, 25-yr, 100-yr) to obtain land disturbance permits.
144-DPI VECTOR PREVIEW · PAGE 1 OF 1
ACROFORM READY
Included Financial Metrics & Line-Item Schedule
Target Roles: Professional Civil Engineers (PE), Land Developers & Municipal Stormwater Reviewers · Search Keywords: stormwater drainage report and detention pond calculation template pdf, tr 55 pre vs post development runoff study, npdes construction swppp inspection checklist, 100 year storm weir routing report
PRE-DEV 25-YR PEAK FLOW
28.4 CFS Baseline
POST-DEV ROUTED 25-YR
21.6 CFS (-23.9% Peak)
DETENTION BASIN VOLUME
2.45 Acre-Feet Storage
WATER QUALITY 80% TSS
First 1.2" Rain Captured
| CODE | DESCRIPTION & TECHNICAL SPECIFICATION | BASIS / QTY | AMOUNT / DELTA |
|---|---|---|---|
| HYD-TR55 | NRCS TR-55 & HydroCAD Watershed Routing (2, 10, 25 & 100-Year 24-Hr Type II Storm Events) | 14.8-Acre Basin | $5,800.00 |
| BAS-WEIR | Multi-Stage Concrete Outlet Control Structure (6" WQ Orifice + 18" Culvert + Broad-Crested Weir) | 1.5' Freeboard | $6,400.00 |
| NPD-SWP | NPDES Construction General Permit (CGP) Notice of Intent (NOI) & 3-Phase Erosion Control SWPPP | TDEC Permit | $4,200.00 |
| MS4-COV | Long-Term Detention Basin Maintenance Covenant & As-Built Stage-Storage Certification | Recorded Covenant | $3,000.00 |
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