Macroinvertebrate Results for Summer 2001
| Site | Stream Name | Avg. Width | Avg. Depth | Flow Rate | Temp | Collection Time | Worms | Flatworms | Leeches | Crayfish | Sowbugs | Scuds | Stoneflies | Mayflies | Dragonflies Damselflies | Hellgrammites Fishflies Alderflies | Net spinning Caddisflies | Most Caddisflies | Beetles | Midges | Black Flies | Most True Flies | Gilled Snails | Lunged Snails | Clams | Other | Total | Index Value |
| C-1 | Crooked Run | 18 ft. | 10 in. | normal | 71.5 F | 80 s | 5 | 2 | 0 | 0 | 0 | 0 | 2 | 63 | 0 | 4 | 88 | 47 | 2 | 2 | 0 | 3 | 0 | 0 | 0 | 4 | 222 | 8 |
| C-2 | Cedar Run | 17 ft. | 12 in. | normal | 73 F | 35 s | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 25 | 0 | 4 | 150 | 7 | 60 | 13 | 0 | 0 | 0 | 0 | 0 | 1 | 264 | 8 |
| C-5 | Hazel River | 20 ft. | 4 in. | normal | 78 F | 40 s | 0 | 3 | 0 | 0 | 0 | 0 | 8 | 49 | 0 | 19 | 98 | 11 | 80 | 8 | 14 | 2 | 0 | 0 | 0 | 0 | 292 | 10 |
| C-12 | Rappahannock River | 40 ft. | 3 to 4 in. | low | 75 F | 30 s | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 20 | 0 | 0 | 29 | 125 | 11 | 5 | 5 | 1 | 0 | 0 | 2 | 0 | 201 | 11 |
| C-13 | Robinson River | 50 ft. | 12 in. | normal | 69 F | 20 s | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 37 | 1 | 5 | 46 | 11 | 34 | 12 | 268 | 1 | 0 | 0 | 2 | 5 | 423 | 8 |
| C-14 | Rapidan River | 50 ft. | 18 in. | normal | 78 F | 50 s | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 80 | 1 | 1 | 7 | 0 | 11 | 12 | 95 | 0 | 1 | 0 | 0 | 0 | 211 | 10 |
| C-15 | Mountain Run (Trib) | 5 ft. | 9 in. | normal | 76 F | 35 s | 12 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 250 | 1 | 5 | 24 | 1 | 7 | 0 | 0 | 0 | 0 | 325 | 5 |
| C-17 | Mountain Run | 14 ft. | 6 in. | low | 78 F | 110 s | 14 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 18 | 55 | 3 | 0 | 0 | 8 | 1 | 0 | 119 | 4 |
| C-18 | Thornton River | 30 ft. | 8 in. | normal | 71.5 F | 110 s | 12 | 2 | 0 | 0 | 0 | 0 | 1 | 53 | 0 | 9 | 22 | 2 | 1 | 34 | 24 | 0 | 0 | 0 | 0 | 0 | 160 | 9 |
| F-1 | Carters Run | 35 ft. | 8 in. | normal | 69.8 F | 20 s | 9 | 0 | 0 | 0 | 0 | 0 | 24 | 154 | 1 | 19 | 193 | 13 | 90 | 0 | 1 | 3 | 0 | 0 | 2 | 0 | 509 | 10 |
| F-3 | Great Run (East) | 10 ft. | 4 in. | normal | 69.8 F | 20 s | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 1 | 368 | 0 | 8 | 33 | 1 | 2 | 0 | 0 | 0 | 0 | 421 | 6 |
| F-4 | Fiery Run | 10 ft. | 10 in. | normal | 75 F | 35 s | 17 | 2 | 0 | 2 | 0 | 0 | 16 | 63 | 0 | 4 | 65 | 9 | 20 | 7 | 2 | 7 | 0 | 0 | 0 | 0 | 214 | 10 |
| F-10 | Great Run (West) | 10 ft. | 6 in. | normal | 73.4 F | 20 s | 1 | 0 | 0 | 1 | 0 | 0 | 5 | 12 | 1 | 5 | 110 | 58 | 75 | 2 | 0 | 0 | 0 | 0 | 10 | 0 | 280 | 9 |
| F-12 | Marsh Run | 10 ft. | 6 in. | high | 71.6 F | 150 s | 127 | 0 | 2 | 0 | 1 | 3 | 0 | 10 | 0 | 1 | 9 | 0 | 3 | 44 | 0 | 10 | 0 | 10 | 1 | 0 | 221 | 2 |
| F-14 | Thumb Run | 40 ft. | 8 in. | normal | 73.4 F | 20 s | 6 | 0 | 0 | 0 | 0 | 0 | 3 | 73 | 1 | 3 | 442 | 42 | 20 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 593 | 8 |
| F-15 | Deep Run | 15 ft. | 3 in. | normal | 69.8 F | 40 s | 3 | 0 | 2 | 0 | 0 | 0 | 25 | 49 | 5 | 19 | 72 | 41 | 39 | 3 | 0 | 11 | 0 | 0 | 7 | 0 | 276 | 11 |
| G-4 | South River | 10 ft. | 4 in. | low | 77 F | 45 s | 17 | 2 | 0 | 0 | 0 | 0 | 25 | 49 | 0 | 25 | 81 | 44 | 9 | 16 | 8 | 4 | 7 | 0 | 0 | 9 | 264 | 9 |
| G-5 | Conway River | 12 ft. | 8 in. | normal | 68 F | 35 s | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 62 | 0 | 5 | 125 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 214 | 8 |
| M-3 | Rapidan River at 662 | 14 ft. | 11 in. | low | 77 F | 50 s | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 31 | 0 | 2 | 99 | 0 | 1 | 23 | 3 | 22 | 0 | 0 | 0 | 7 | 207 | 5 |
| M-4 | Beautiful Run | 12 ft. | 6 in. | normal | 66.2 F | 90 s | 29 | 1 | 0 | 2 | 0 | 0 | 0 | 28 | 0 | 15 | 50 | 3 | 16 | 93 | 8 | 17 | 0 | 0 | 6 | 6 | 274 | 7 |
| M-5 | Great Run | 16 ft. | 14 in. | normal | 71.6 F | 90 s | 3 | 6 | 0 | 0 | 0 | 0 | 1 | 28 | 0 | 7 | 18 | 2 | 22 | 43 | 17 | 4 | 0 | 0 | 0 | 10 | 161 | 10 |
| M-6 | Deep Run at 603 | 15 ft. | 18 in. | normal | 74 F | 65 s | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 39 | 0 | 13 | 96 | 11 | 13 | 8 | 9 | 21 | 0 | 0 | 0 | 7 | 241 | 7 |
| M-9 | White Oak Run | 20 ft. | 12 in. | normal | 75 F | 65 s | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 47 | 0 | 15 | 87 | 18 | 10 | 1 | 28 | 0 | 0 | 0 | 0 | 9 | 223 | 9 |
| M-11 | Rose River | 17 ft. | 8 in. | low | 68 F | 20 s | 0 | 19 | 0 | 0 | 0 | 0 | 1 | 36 | 0 | 1 | 142 | 12 | 9 | 20 | 0 | 10 | 0 | 0 | 0 | 5 | 255 | 7 |
| M-12 | Robinson River at 670 | 23 ft. | 10 in. | low | 60.8 F | 80 s | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 33 | 0 | 18 | 49 | 0 | 15 | 47 | 0 | 15 | 0 | 0 | 0 | 27 | 208 | 10 |
| M-14 | Popham River | 20 ft. | 4 in. | normal | 74 F | 90 s | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 44 | 0 | 16 | 20 | 15 | 25 | 2 | 0 | 6 | 0 | 0 | 0 | 0 | 131 | 12 |
| M-16 | Rapidan River at 671 | 50 ft. | 5 in. | normal | 83 F | 20 s | 5 | 0 | 0 | 0 | 2 | 0 | 29 | 30 | 2 | 0 | 30 | 0 | 12 | 4 | 51 | 0 | 1 | 0 | 3 | 0 | 288 | 8 |
| O-1 | Blue Run | 12 ft. | 10 in. | normal | 70 F | 20 s | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 28 | 0 | 0 | 166 | 15 | 41 | 102 | 0 | 15 | 0 | 0 | 0 | 9 | 381 | 8 |
| O-2 | Mine Run | 20 ft. | 12 in. | normal | 73.4 F | 20 s | 4 | 12 | 0 | 1 | 0 | 0 | 3 | 49 | 1 | 20 | 10 | 81 | 62 | 7 | 1 | 0 | 0 | 4 | 4 | 0 | 259 | 10 |
| O-3 | Mountain Run at 611 | 17.5 ft. | 12 in. | normal | 70.7 F | 20 s | 18 | 4 | 0 | 0 | 0 | 0 | 1 | 45 | 0 | 5 | 56 | 17 | 98 | 11 | 1 | 0 | 0 | 1 | 1 | 0 | 258 | 8 |
| R-2 | Hughes River | 30 ft. | 16 in. | normal | 78 F | 20 s | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 61 | 0 | 8 | 89 | 26 | 22 | 2 | 9 | 3 | 0 | 0 | 0 | 0 | 221 | 11 |
| R-3 | Rush River | 20 ft. | 4 in. | normal | 72 F | 60 s | 2 | 4 | 0 | 0 | 0 | 0 | 2 | 53 | 0 | 2 | 131 | 10 | 0 | 3 | 0 | 4 | 0 | 0 | 0 | 0 | 211 | 7 |
| R-5 | Thornton River (North Fork) | 15 ft. | 3 in. | low | 64 F | 40 s | 8 | 1 | 0 | 1 | 0 | 0 | 29 | 41 | 2 | 9 | 54 | 16 | 63 | 4 | 0 | 6 | 0 | 0 | 0 | 0 | 234 | 11 |
| R-6 | Thornton River (South Fork) | 15 ft. | 3 in. | low | 64 F | 80 s | 9 | 2 | 0 | 1 | 0 | 0 | 17 | 40 | 2 | 2 | 19 | 20 | 88 | 10 | 0 | 7 | 0 | 0 | 0 | 0 | 217 | 11 |
| R-8 | Piney River | 6 ft. | 5 in. | low | 68 F | 20 s | 10 | 2 | 0 | 0 | 0 | 0 | 7 | 18 | 0 | 0 | 92 | 24 | 2 | 32 | 17 | 4 | 0 | 0 | 0 | 0 | 208 | 6 |
| R-9 | Covington River | 15 ft. | 4 in. | low | 68 F | 70 s | 4 | 2 | 0 | 1 | 0 | 0 | 10 | 102 | 0 | 15 | 151 | 47 | 7 | 7 | 6 | 13 | 0 | 0 | 0 | 5 | 370 | 8 |
| R-12 | Battle Run | 15 ft. | 9 in. | high | 70 F | 50 s | 0 | 4 | 0 | 0 | 0 | 1 | 4 | 63 | 2 | 5 | 97 | 14 | 14 | 25 | 3 | 2 | 0 | 0 | 2 | 3 | 239 | 9 |
| R-17 | Jordan River | 18 ft. | 6 in. | normal | 69.8 F | 20 s | 0 | 0 | 4 | 0 | 0 | 0 | 2 | 76 | 0 | 4 | 207 | 17 | 7 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 318 | 7 |