| TP and TSS Annual Watershed Loading, click here |
| Storm Sewer Drainage Area Estimates, click here |
| Description of Methodology, click here |
Runoff Volume Estimates for All Subwatersheds
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Runoff Volume (ac-ft) |
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| Storm frequency | Precipitation (in) | Portage Creek | West Fork | Arcadia Creek | Axtell Creek |
| 2-month/24-hour | 1.07 | 15 | 10 | 23 | 5 |
| 3-month/24-hour | 1.25 | 45 | 29 | 42 | 9 |
| 4-month/24-hour | 1.37 | 73 | 47 | 58 | 12 |
| 6-month/24-hour | 1.58 | 135 | 85 | 89 | 18 |
| 9-month/24-hour | 1.79 | 214 | 133 | 126 | 24 |
| 1-year/24-hour | 1.95 | 282 | 175 | 157 | 30 |
| 2-year/24-hour | 2.37 | 496 | 305 | 248 | 46 |
| 5-year/24-hour | 3.00 | 889 | 542 | 405 | 74 |
| 10-year/24-hour | 3.52 | 1,263 | 768 | 549 | 99 |
| 25-year/24-hour | 4.45 | 2,016 | 1,221 | 829 | 147 |
| 50-year/24-hour | 5.27 | 2,746 | 1,658 | 1,092 | 193 |
| 100-year/24-hour | 6.15 | 3,578 | 2,157 | 1,386 | 243 |
Arcadia Creek Subwatershed Annual Loading Estimates
Runoff Volume 5, 841.48 acre-feet/year
| Total Suspended Solids | Total Phosphorus | Soluble Reactive Phosphorus | Lead | Copper | Zinc | Cadmium | |
| Pounds/Year | 1,319,968 | 4,117 | 1,772 | 501 | 378 | 1,905 | 30.8 |
Axtell Creek Subwatershed Annual Loading Estimates
Runoff Volume 913.62 acre-feet/year
| Total Suspended Solids | Total Phosphorus | Soluble Reactive Phosphorus | Lead | Copper | Zinc | Cadmium | |
| Pounds/Year | 184,882 | 598 | 253 | 77 | 58 | 296 | 4.8 |
Portage Creek Subwatershed Annual Loading Estimates
Runoff Volume 14,943.41
acre-feet/year
| Total Suspended Solids | Total Phosphorus | Soluble Reactive Phosphorus | Lead | Copper | Zinc | Cadmium | |
| Pounds/Year | 3,346,479 | 8,771 | 3,920 | 1,033 | 772 | 4,004 | 63.9 |
West Fork Portage Creek Subwatershed Annual Loading Estimates
Runoff Volume 8,535.22
acre-feet/year
| Total Suspended Solids | Total Phosphorus | Soluble Reactive Phosphorus | Lead | Copper | Zinc | Cadmium | |
| Pounds/Year | 1,873,215 | 5,432 | 2,097 | 483 | 358 | 1822 | 29.5 |