| Area (acres) | Volume (acre-feet) | |
|---|---|---|
| Galena Main Stem (computed from surveys) | 3171 | 6530 |
| Tributaries covered by surveys: | ||
| Shullsburg Branch | 516 | 1027 |
| Coon Branch | 229 | 448 |
| East Fork | 4731 | 1382 |
| Subtotal - all surveyed areas | 4389 | 9387 |
| Estimates for areas not covered by surveys: | ||
| Direct drainage: | ||
| Above Elk Grove Branch | 75 | 60 |
| Elk Grove Branch to Pats Creek | 115 | 115 |
| Pats Creek to Madden Branch | 15 | 20 |
| Madden Branch to Shullsburg Branch | 180 | 190 |
| Shullsburg Branch to Coon Branch | 410 | 720 |
| Coon Branch to East Fork | 270 | 400 |
| East Fort to Hughletts Branch | 165 | 345 |
| Hughletts Branch to mouth | 125 | 250 |
| Subtotal - all direct drainage | 1355 | 2100 |
| Principal tributaries not surveyed: | ||
| Elk Grove Branch and tributaries | 155 | 185 |
| Pats Creek and tributaries | 380 | 480 |
| Madden Branch and tributaries | 890 | 1175 |
| Hughletts Branch2 | 80 | 183 |
| Subtotal - principal tributaries not surveyed | 1505 | 2023 |
| Secondary tributaries to surveyed tributaries: | ||
| Tributaries to Shullsburg Branch | 490 | 665 |
| Tributaries to Coon Branch | 70 | 110 |
| Tributaries to East Fork | 315 | 810 |
| Tributaries to Hughletts Branch | 65 | 135 |
| Subtotal - secondary tributaries | 940 | 1720 |
| TOTALS | 8,189 | 15,230 |
1 Including estimated 185 acres not covered by field mapping.
2 Three cross sections bored and surveyed, but areas of sedimentation estimated.