Great Falls Spring Sport Fish Survey Results
| 2011 |
2009
| 2007 | 2006 | 2004 | 2003 | |
|---|---|---|---|---|---|---|
| Hours electrofished | 6 | 6 | 6 | 6 | 6 | 6 |
| Total number of black bass | 200 | 306 | 367 | 425 | 99 | 153 |
| Percent harvestable (over 10 inches) | 72.39% | 56.02% | 43.38 | 58.4 | 64.8 | 50.9 |
| Number of largemouth bass | 163 | 266 | 325 | 358 | 54 | 104 |
| Number of smallmouth bass | 0 | 0 | 1 | 2 | 3 | 0 |
| Number of spotted bass | 37 | 40 | 41 | 65 | 42 | 49 |
| Number of crappie | 53 | 198 | 16 | 46 | 0 | 11 |
| Number of white crappie | 47 | 165 | 13 | 39 | 0 | 9 |
| Number of black crappie | 6 | 33 | 3 | 7 | 0 | 2 |
| Electrofishing catch rate (per hour) | 33.3 | 51 | 61.2 | 70.8 | 16.5 | 25.5 |
| Average weight (pounds) | 1.1 | 1.1 | 0.9 | 1.1 | 0.9 | 1.1 |
| Largest black bass (pounds) | 5.6 | 4.5 | 5.4 | 4.4 | 3 | 5.1 |
| Disease/parasites | 11.50% | 5.20% | 1.40% | 3.5% | 1% | 6.5% |
| Number weighing more than 5 pounds | 1 | 0 | 1 | 0 | 0 | 2 |
| Number weighing more than 4 pounds | 1 | 3 | 1 | 4 | 0 | 3 |
| Number weighing more than 3 pounds | 1 | 4 | 4 | 9 | 0 | NA |