| Ni Cnty RD 9 over Cheyenne River | Poor | 132.9 ft | 3 | 1920 |
| US 18 over Niobrara River | Fair | 108.9 ft | 2,942 | 1988 |
| US 18 over Old Woman Creek | Fair | 194.9 ft | 2,150 | 1971 |
| US 18 over Old Woman Creek | Fair | 145.0 ft | 2,150 | 1987 |
| US 18 over Mule Creek | Fair | 24.6 ft | 2,150 | 1988 |
| US 85 over Cheyenne River | Fair | 419.9 ft | 1,084 | 1990 |
| US 85 over Robbers Roost Creek | Fair | 21.7 ft | 1,084 | 1992 |
| US 20 over Niobrara River | Fair | 55.1 ft | 754 | 2003 |
| US 20 over Van Tassell Creek | Fair | 94.2 ft | 538 | 1986 |
| US 20 over Uprr | Fair | 241.1 ft | 529 | 1984 |
| US 20 over S Fork Niobrara River | Fair | 118.1 ft | 529 | 1986 |
| W Pershing Street over Niobrara River | Fair | 33.5 ft | 319 | 1991 |
| Wyo 270 over Cherry Creek | Fair | 125.0 ft | 285 | 1995 |
| Wyo 270 over Provost Draw | Fair | 24.0 ft | 191 | 2004 |
| Wyo 270 over Old Woman Creek | Fair | 149.9 ft | 191 | 2007 |
| Wyo 272 over Lance Creek | Fair | 120.1 ft | 42 | 1969 |
| Ni Cnty RD 64 over South Indian Creek | Fair | 89.9 ft | 40 | 1958 |
| Ni Cnty RD 11 over Black Creek | Fair | 40.0 ft | 33 | 1981 |
| Ni Cnty RD 6 over Alkali Creek | Fair | 118.1 ft | 33 | 1997 |
| Ni Cnty RD 14 over Lightning Creek | Fair | 109.9 ft | 29 | 1994 |
| Ni Cnty RD 14 over Cow Creek | Fair | 109.9 ft | 29 | 1994 |
| Ni Cnty RD 13 over Lance Creek | Fair | 142.1 ft | 17 | 1983 |
| US 85 over Uprr | Good | 69.9 ft | 2,942 | 2016 |
| US 18 over Stockpass | Good | 29.9 ft | 2,406 | 1970 |
| US 85 over Bobcat Creek | Good | 21.7 ft | 1,084 | 1991 |
| US 20 over Niobrara River | Good | 140.1 ft | 538 | 2019 |
| Daley Street over Niobrara River | Good | 21.3 ft | 344 | 1986 |
| Wyo 270 over Unnamed Draw | Good | 25.9 ft | 279 | 1956 |
| Wyo 271 over Lance Creek | Good | 214.9 ft | 39 | 2003 |
| Wyo 271 over Little Lightning Creek | Good | 115.2 ft | 39 | 2003 |
| Ni Cnty RD 6 over Hungry Hollow | Good | 40.0 ft | 33 | 1983 |
| Ni Cnty RD 11 over Lance Creek | Good | 181.1 ft | 33 | 2017 |
| Ni Cnty RD 18 over Sage Creek | Good | 128.0 ft | 31 | 1997 |
| Ni Cnty RD 50 over Lightning Creek | Good | 55.1 ft | 25 | 1994 |