| IRR - US 2 over Chelsea Creek | Poor | 37.4 ft | 2,054 | 1960 |
| IRR - US 2 over Drainage | Poor | 21.0 ft | 1,452 | 1970 |
| Poplar River RD over Poplar River 015 | Poor | 104.7 ft | 563 | 1985 |
| IRR - S 13 over Sprague Coulee | Poor | 77.1 ft | 229 | 1931 |
| IRR - S 13 over W Fork Poplar R Ovrflow | Poor | 77.1 ft | 229 | 1932 |
| IRR - S 251 over Hay Creek | Poor | 39.0 ft | 88 | 1950 |
| County Road 641 over Sheep Creek 002 | Poor | 28.5 ft | 9 | 1986 |
| IRR - US 2 over Mosquito Creek | Fair | 40.7 ft | 4,269 | 1986 |
| IRR - US 2 over Little Wolf Creek | Fair | 33.1 ft | 4,269 | 1988 |
| IRR - US 2 over Poplar River | Fair | 394.0 ft | 2,296 | 2000 |
| S 16 over Sheep Creek | Fair | 132.9 ft | 2,129 | 1970 |
| IRR - US 2 over Tule Creek | Fair | 120.1 ft | 2,054 | 1958 |
| IRR - US 2 over Wolf Creek | Fair | 151.9 ft | 1,982 | 1956 |
| US 2 over Shotgun Creek | Fair | 239.8 ft | 1,765 | 2010 |
| Us-2 over Clover Creek | Fair | 101.4 ft | 1,651 | 2020 |
| US 2 over Little Muddy Creek | Fair | 181.4 ft | 1,516 | 2010 |
| IRR - US 2 over Flynn Creek | Fair | 58.4 ft | 1,479 | 1956 |
| IRR - S 13 over Little Wolf Creek | Fair | 72.2 ft | 1,468 | 1978 |
| IRR - S 13 over Drainage | Fair | 40.7 ft | 1,468 | 1978 |
| IRR - S 13 over Missouri River | Fair | 625.7 ft | 1,163 | 1998 |
| US 2 over Clover Creek | Fair | 91.5 ft | 1,144 | 1967 |
| S 16 over Clover Creek-rr | Fair | 268.0 ft | 1,136 | 1957 |
| S 16 over Lost Creek | Fair | 29.9 ft | 918 | 1976 |
| IRR - US 2 over Big Muddy River | Fair | 289.0 ft | 917 | 2012 |
| Poplar River RD over Poplar River 013 | Fair | 180.1 ft | 563 | 1957 |
| IRR BIA RTE 7 over Poplar River | Fair | 254.6 ft | 481 | 2002 |
| IRR - S 13 over Tule Creek | Fair | 120.1 ft | 368 | 1991 |
| IRR - S 13 over Chelsea Creek | Fair | 26.9 ft | 368 | 1992 |
| S 327 over Little Muddy Creek | Fair | 141.7 ft | 267 | 2020 |
| IRR - S 13 over Midway Coulee | Fair | 58.1 ft | 229 | 1932 |
| IRR - S 13 over W Fork Poplar R Overflow | Fair | 193.9 ft | 229 | 2005 |
| IRR - S 13 over W Fork Poplar River | Fair | 310.0 ft | 229 | 2005 |
| IRR - S 344 over Sheep Creek | Fair | 51.5 ft | 197 | 1956 |
| IRR - S 344 over Big Muddy Creek | Fair | 109.9 ft | 153 | 1956 |
| IRR - S 251 over Drainage | Fair | 25.9 ft | 145 | 1948 |
| IRR County Road 20 over Smoke Creek 016 | Fair | 94.2 ft | 100 | 1955 |
| Irrcounty Road 208 over Poplar River 039 | Fair | 246.7 ft | 100 | 1964 |
| Irrcounty Road 221 over Smoke Creek 025 | Fair | 77.1 ft | 100 | 2004 |
| Irrcounty Road 380 over Smoke Creek 017 | Fair | 109.9 ft | 100 | 1957 |
| Slab RD over Big Muddy Creek 038 | Fair | 51.5 ft | 100 | 1950 |
| County Road 1010 over East Fork Shotgun 056 | Fair | 26.6 ft | 100 | 1988 |
| IRR - S 344 over Smoke Creek | Fair | 109.9 ft | 91 | 1960 |
| S Bainville RD over Little Muddy Creek 049 | Fair | 60.0 ft | 42 | 1995 |
| US 2 over Red Bank Creek | Good | 125.7 ft | 1,516 | 2010 |
| IRR - US 2 over Drainage | Good | 21.3 ft | 1,402 | 1970 |
| S 327 over Drainage | Good | 21.3 ft | 275 | 1999 |
| S 327 over Little Muddy Creek | Good | 123.7 ft | 267 | 2020 |
| S 327 over Drainage | Good | 22.6 ft | 267 | 2020 |
| IRR BIA RTE 34 over Box Elder Creek | Good | 25.9 ft | 250 | 1997 |
| IRR - S 13 over Box Elder Creek | Good | 109.3 ft | 229 | 2019 |
| IRR BIA RTE 40 over Poplar River | Good | 221.5 ft | 200 | 2000 |
| RD 2051 over East Shotgun Creek 057 | Good | 37.4 ft | 100 | 2023 |
| Road 1077 over Cottonwood Creek 018 | Good | 28.9 ft | 100 | 1995 |
| County Road 249 over Sheep Creek 061 | Good | 44.9 ft | 100 | 1999 |
| Three Corners RD over Smoke Creek 024 | Good | 69.9 ft | 100 | 2016 |
| IRR - S 251 over Drainage | Good | 27.9 ft | 88 | 2023 |
| IRR - S 251 over Kirn Coulee | Good | 29.9 ft | 88 | 2008 |