| Number | County | Name | Water | Spans | Length | Built | Truss | GPS | Description |
| 12-08-a | Boise | 1 | 25' | 1990 | Stringer | UNK | SW of Idaho City. ID21 SW 4.8 miles on E. side of road. | ||
| 12-08-B | Mores Creek | 1 | 36' | 1977 | Stringer | N43 46.475 W115 54.421 | SW of Idaho City. ID21 SW 5.4 miles from jct with Main St. in Idaho City to the bridge on the E. side of the road at 3361. | ||
| 12-09-a | Bonner | Cedar Street | Sand Creek | many | 444' | 1982 | Stringer | N48 16.567 W116 32.817 | In Sandpoint. Cedar St. E. 0.25 miles from jct with US2 in Sandpoint to the bridge. Craft shops inside the bridge. Walkway on S. side. |
| 12-11-A | Boundary | Prairie Round Creek | 1 | ~25' | Stringer | N48 57.852 W116 12.168 | SSW of Eastport. US95 S. (curves W. & N.) 5.7 miles from jct with US95 S/N in Eastport to the bridge on the W. side of the road. | ||
| 12-15-a | Caribou | Hooper Springs Park | Soda Creek | 2 | 36' | 1970 | Stringer | N42 40.752 W111 36.251 | In Hooper Springs Park N. of Soda Springs. 3rd Av. N. 1.6 miles from jct with US30 in Soda Springs, W. (curves N.) on Government Dam Rd. 1.0 miles to the bridge on the W. side of the road. |
| 12-24-a | Gooding | Black | ditch | 1 | 24' | 1983 | Stringer | approximate N42 43.44 W114 37.61 | SE of Wendell. S1950E S. 2.9 miles from jct with I84 exit 157 on the S. side of Wendell, E. on E3300S about 4.0 miles to the bridge. |