| ILLINOIS RIVER GAGE SHEET | ||
| Location / description | river mile | flat pool |
| T.J. O'Brien Lock, Pool (upstream side) | 326.5 | Lake Level |
| T.J. O'Brien Lock, Tail (downstream side) | 326.4 | 577.5 |
| Lockport Lock, Pool (upstream side) | 291.1 | 577.5 |
| Lockport Lock, Tail (downstream side) | 290.9 | 538.5 |
| Brandon Road Lock, Pool (upstream side) | 286.0 | 538.5 |
| Brandon Road Lock, Tail (downstream side) | 285.9 | 504.5 |
| Hunting Lodge Bend, Right Bank, staff | 281.2 | 504.5 |
| I-55 HWY Bridge, staff on bridge pier | 277.9 | 504.5 |
| Dresden Lock, Pool (upstream side) | 271.5 | 504.5 |
| Dresden Lock, Tail (downstream side) | 271.4 | 482.8 |
| Morris, Right Bank, staff on bridge pier | 263.4 | 482.8 |
| Grist Island, Right Bank, staff, top of wall = 437.24 | 258.8 | 482.8 |
| Seneca, staff on bridge pier | 252.8 | 482.8 |
| Kickapoo, Right Bank, staff on cell | 249.9 | 482.8 |
| Marseilles Dam, (upstream side) | 247.0 | 482.8 |
| Marseilles Lock, Pool (upstream side) | 244.5 | 482.8 |
| Marseilles Lock, Tail (downstream side) | 244.4 | 458.5 |
| ADM Elevator, Right Bank, bolt on upstream cell elvation = 461.7 | 241.9 | 458.5 |
| Ottawa, Left Bank, staff on bridge pier reads .2 high? | 218.4 | 440.1 |
| Starved Rock Lock, Pool (upstream side) | 231.1 | 458.5 |
| Starved Rock Lock, Tail (downstream side) | 230.9 | 440.3 |
| La Salle, Right Bank, staff at Tabor Harbor, gage zero = 430 | 223.3 | 440.2 |
| Spring Valley, Right Bank, staff on bridge pier reads .2 high? | 218.4 | 440.1 |
| Illinois Power Plant, Left Bank, staff on downstream side of building | 212.0 | 440.1 |
| Hennepin, Left Bank, staff on cell at elevator | 207.5 | 440.1 |
| Henry, Right Bank, staff at old lock | 196.1 | 440.0 |
| Lacon, metal pipe | 189.1 | 440.0 |
| Chilicothe, Right Bank, staff on cell at elevator | 180.3 | 440.0 |
| Corps Peoria Boat Yard, Right Bank staff on sheet piling | 164.2 | 440.0 |
| Peoria Lock, Pool (upstream side) | 157.7 | 440.0 |
| Peoria Lock, Tail (downstream side) | 157.7 | 430.0 |
| Pekin, Left Bank, staff on bridge pier | 152.9 | 429.9 |
| CFI Harbor, Right Bank, bolt on cell elevation = 444.46 | 146.7 | 429.7 |
| Kingston Mines, Right Bank, staff + satellite at terminal | 145.5 | 429.7 |
| Copperas, Right Bank, staff + satellite at old lock | 136.8 | 429.5 |
| East Liverpool, Right Bank, top of I-beam elev. = 432.98 at pump station dwst end | 131.6 | 429.5 |
| Liverpool, Right Bank, staff at terminal | 127.1 | 429.4 |
| Quiver Island, Left Bank, staff on sheet piling at coal dock | 120.8 | 429.2 |
| Havana, Left Bank, staff on bridge pier + staff at conservation ramp | 119.6 | 429.2 |
| Havana Power Plant, Left Bank, staff on cell | 118.5 | 429.2 |
| Anderson Lake, Right Bank, staff at outfall | 108.4 | 429.1 |
| Browning, Right Bank, staff | 97.2 | 429.0 |
| Beardstown, Left Bank, staff on piling Logsdon Tug + Satellite in shed (9.1 = flat) | 88.5 | 429.0 |
| LaGrange Lock, Pool (upstream side) | 80.2 | 429.0 |
| LaGrange Lock, Tail (downstream side) | 80.2 | 419.6 |