| Carries | Crosses | Location | Design | Status | Year Built | Year Recon. | Span Len. | Total Len. | Condition | Suff. Rating | ID | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NBI report Bridgehunter | IRR COUNTY ROAD | HUMP CK | 2.5E & 2S WATAUGA | Steel Truss - Thru | NR eligible | 1930 | -- | 39.0 | 42.0 | Poor | 31.1 | 000000016252040 |
| NBI report | IRR COUNTY ROAD | DIRT LODGE CK | 2.2E & 12.9S WATAUGA | Steel Stringer/Multi-beam or girder | -- | 1932 | -- | 32.2 | 34.1 | Poor | 31.6 | 000000016252149 |
| NBI report | IRR COUNTY ROAD | HAY CK | 0.8E & 0.2S MORRISTOWN | Steel Stringer/Multi-beam or girder | -- | 1935 | -- | 29.9 | 32.2 | Fair | 84.8 | 000000016148012 |
| NBI report | IRR US012 | BURLINGTON NORTHERN RR | 7.9 E PERKINS CO LINE | Steel Stringer/Multi-beam or girder (5 spans) | -- | 1936 | -- | 37.1 | 193.3 | Poor | 72.8 | 000000016083011 |
| NBI report | IRR US012 | BURLINGTON NORTHERN RR | 0.2 W JCT SD 65 S | Steel Stringer/Multi-beam or girder (5 spans) | -- | 1936 | -- | 29.2 | 152.6 | Fair | 77.3 | 000000016328018 |
| NBI report | 220TH AVENUE | HAY CK | 0.5S MORRISTOWN | Wood Stringer/Multi-beam or girder (2 spans) | -- | 1939 | -- | 24.9 | 51.8 | Poor | 42.8 | 000000016140015 |
| NBI report | IRR US012 | HAY CK | 1.3 E OF MORRISTOWN | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1949 | -- | 54.1 | 143.4 | Fair | 78.9 | 000000016154005 |
| NBI report | IRR COUNTY ROAD | CK | 3W & 8.4S MCINTOSH | Steel Stringer/Multi-beam or girder (2 spans) | -- | 1950 | -- | 24.9 | 51.8 | Fair | 68.6 | 000000016290104 |
| NBI report | IRR SD065 | WHITE SHIRT CK | 5.3 S JCT US 12 | Concrete Slab (5 spans) | -- | 1956 | -- | 30.8 | 151.6 | Fair | 83.0 | 000000016328073 |
| NBI report | IRR SD065 | HUMP CK | 10.6 S JCT US 12 | Concrete Slab (5 spans) | -- | 1956 | -- | 35.4 | 174.5 | Fair | 93.8 | 000000016329127 |
| NBI report | IRR US012 | CLAYMORE CK | 2.4 W WALWORTH CO LINE | Steel Stringer/Multi-beam or girder (5 spans) | -- | 1958 | -- | 52.8 | 251.7 | Poor | 71.2 | 000000016725271 |
| NBI report | IRR BIA RTE 2 | STINK CREEK | 3.2 KM WEST OF BULLHEAD | Concrete Slab (3 spans) | -- | 1960 | -- | 29.9 | 74.2 | Fair | 80.3 | 00000000000A041 |
| NBI report | IRR US012 | GRAND RV | 8.2 NW JCT SD 20 | Steel Stringer/Multi-beam or girder (5 spans) | -- | 1960 | -- | 120.1 | 556.1 | Fair | 77.4 | 000000016665200 |
| NBI report | IRR BIA RTE 44 | NORTH FORK OF OAK CREEK | 5.6 KM SE OF MAHTO | Concrete Channel beam (3 spans) | -- | 1961 | -- | 24.0 | 63.0 | Fair | 93.9 | 00000000000A068 |
| NBI report | IRR SD065 | FIRESTEEL CK | 0.4 N DEWEY CO LINE | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1961 | -- | 42.7 | 109.6 | Fair | 82.8 | 000000016280326 |
| NBI report | IRR BIA RTE 44 | WEST FORK OF OAK CREEK | 1 KM NE OF MAHTO | Prestressed Tee beam (3 spans) | -- | 1961 | 1988 | 48.9 | 92.9 | Fair | 96.6 | 00000000000A067 |
| NBI report | IRR US012 | BR HAY CK | 6.0 E PERKINS CO LINE | Concrete Slab (3 spans) | -- | 1962 | -- | 18.4 | 54.1 | Fair | 79.9 | 000000016066010 |
| NBI report | IRR US012 | HAY CK | 6.7 E PERKINS CO LINE | Concrete Slab (3 spans) | -- | 1962 | -- | 28.2 | 80.1 | Fair | 84.7 | 000000016072011 |
| NBI report | IRR SD1806 | OAK CK | 5.7 N JCT US 12 | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1963 | -- | 89.9 | 232.0 | Fair | 83.8 | 000000016720217 |
| NBI report | IRR SD1806 | OAHE LK (GRAND RV) | 0.4 N JCT US 12 | Steel Stringer/Multi-beam or girder (32 spans) | -- | 1963 | -- | 140.1 | 4001.5 | Fair | 80.0 | 000000016737253 |
| NBI report | IRR US012 | CK | 3.1 E JCT SD 65 S | Concrete Culvert (2 spans) | -- | 1964 | -- | 11.2 | 23.6 | Fair | 96.3 | 000000016361020 |
| NBI report | IRR US012 | DRY RUN CK | 0.7 W JCT SD 63 | Concrete Culvert (2 spans) | -- | 1964 | -- | 9.8 | 20.7 | Fair | 96.3 | 000000016574090 |
| NBI report | IRR US012 | CK | 5.5 SE OF MCLAUGHLIN | Concrete Slab (5 spans) | -- | 1964 | -- | 23.3 | 117.1 | Good | 94.3 | 000000016617132 |
| NBI report | IRR US012 | DEEP BANK CK | 6.6 NW JCT SD 20 | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1965 | -- | 69.9 | 182.1 | Fair | 85.8 | 000000016666216 |
| NBI report | IRR US012 | BR SNAKE CK | 1.7 NW JCT SD 20 | Concrete Culvert (2 spans) | -- | 1965 | -- | 10.5 | 21.3 | Fair | 90.8 | 000000016687258 |
| NBI report | IRR US012 | SNAKE CK | 1.5 NW JCT SD 20 | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1966 | -- | 55.1 | 143.4 | Fair | 87.6 | 000000016689259 |
| NBI report | KENEL ROAD | OAK CK | 0.1E JCT SD 63 | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1968 | -- | 60.0 | 158.1 | Fair | 85.6 | 000000016582080 |
| NBI report | IRR SD063 | GRAND RV | 11.3 S OF MCLAUGHLIN | Steel Stringer/Multi-beam or girder (4 spans) | -- | 1970 | -- | 140.1 | 504.0 | Fair | 90.9 | 000000016578202 |
| NBI report | IRR BIA RTE 21 | ROCK CREEK | IN BULLHEAD SOUTH DAKOTA | Concrete Slab (3 spans) | -- | 1971 | -- | 40.0 | 106.0 | Good | 96.5 | 00000000000A042 |
| NBI report | IRR SD1806 | BURLINGTON NORTHERN RR | 3.0 N JCT US 12 | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1973 | -- | 78.1 | 203.8 | Fair | 91.1 | 000000016732234 |
| NBI report | IRR COUNTY ROAD | HUMP CK | 3.7W & 6.1S MCINTOSH | Prestressed Tee beam | -- | 1974 | -- | 34.1 | 35.1 | Fair | 86.7 | 000000016290081 |
| NBI report | IRR COUNTY ROAD | RED WILLOW CK | 5S & 0.8W WATAUGA | Prestressed Tee beam | -- | 1975 | -- | 30.8 | 30.8 | Fair | 88.8 | 000000016222070 |
| NBI report | 220TH AVENUE | HAY CK | 0.1S MORRISTOWN | Prestressed Tee beam (2 spans) | -- | 1977 | -- | 35.1 | 69.9 | Fair | 89.7 | 000000016140011 |
| NBI report | IRR SD073 | BURLINGTON NORTHERN RR | 0.1 S NORTH DAKOTA LINE | Steel Stringer/Multi-beam or girder (3 spans) | -- | 1977 | -- | 84.0 | 199.2 | Fair | 98.7 | 000000016026001 |
| NBI report | IRR SD063 | OAK CK | 1.8 N OF MCLAUGHLIN | Prestressed Stringer/Multi-beam or girder (3 spans) | -- | 1980 | -- | 67.9 | 194.2 | Good | 89.9 | 000000016580075 |
| NBI report | IRR SD063 | CK | 0.9 N OF MCLAUGHLIN | Prestressed Stringer/Multi-beam or girder (3 spans) | -- | 1980 | -- | 56.1 | 157.8 | Good | 96.5 | 000000016580084 |
| NBI report | IRR COUNTY ROAD | GRAND RV | 18S & 1E MORRISTOWN | Prestressed Box beam or girders - Multiple (3 spans) | -- | 1981 | -- | 75.1 | 174.9 | Fair | 92.7 | 000000016149190 |
| NBI report | IRR BIA RTE 4 | FIRE STEEL CREEK | 8 KM EAST OF HWY 65 | Concrete Slab (3 spans) | -- | 1987 | -- | 44.9 | 119.1 | Good | 99.9 | 00000000000A124 |
| NBI report | IRR COUNTY ROAD | DIRT LODGE CK | 1.2E & 11.6S WATAUGA | Prestressed Tee beam (3 spans) | -- | 1988 | -- | 24.0 | 75.1 | Fair | 89.5 | 000000016240136 |
| NBI report | IRR COUNTY ROAD | GRAND RV | 2.4E & 16S THUNDER HAWK | Steel Culvert (6 spans) | -- | 1990 | -- | 4.9 | 140.1 | Fair | 94.0 | 000000016042165 |
| NBI report | TWIN BUTTE ROAD | GRAND RV | 9E & 18S THUNDER HAWK | Steel Culvert (13 spans) | -- | 1990 | -- | 50.9 | 140.1 | Good | 91.9 | 000000016098185 |
| NBI report | IRR US012 | CK | 2.0 W JCT SD 63 | Concrete Culvert (2 spans) | -- | 1991 | -- | 9.8 | 20.7 | Good | 96.3 | 000000016562082 |
| NBI report | IRR COUNTY ROAD | BLACK HORSE BUTTE CK | 4E & 27S THUNDER HAWK | Prestressed Tee beam | -- | 1999 | -- | 59.1 | 60.0 | Good | 100.0 | 000000016060280 |
| NBI report | IRR SD020 | CK | 8.3 W OF TRAIL CITY | Concrete Culvert (2 spans) | -- | 2000 | -- | 9.8 | 20.7 | Good | 94.8 | 000000016537330 |
| NBI report | IRR BIA RTE 4 | LITTLE OAK CREEK | 5.8KM SW OF LITTLE EAGLE | Prestressed Stringer/Multi-beam or girder | -- | 2002 | -- | 96.8 | 96.8 | Good | 97.8 | 00000000000A137 |
| NBI report | 107TH STREET | OAK CK | 1.0W & 2.0N MCLAUGHLIN | Prestressed Tee beam | -- | 2005 | -- | 96.1 | 100.1 | Good | 88.8 | 000000016571070 |
| NBI report | IRR COUNTY ROAD | CK | 1.0W & 28.5S KELDRON | Steel Culvert (2 spans) | -- | 2005 | -- | 10.5 | 25.3 | Good | 98.0 | 000000016091295 |
| NBI report | 237TH AVENUE | FIRESTEEL CK | 3E & 6.7N ISABEL | Concrete Culvert (2 spans) | -- | 2007 | -- | 12.1 | 25.3 | Good | 100.0 | 000000016310313 |
| NBI report | IRR BIA RTE 4 | HIGHBANK CREEK BRIDGE | 8.93KM SW OF LITTLE EAGLE | Prestressed Stringer/Multi-beam or girder | -- | 2008 | -- | 93.8 | 95.8 | Good | 92.8 | 00000000000A149 |
| NBI report | IRR BIA RTE 44 | OAK CREEK | 7.2 KM SE OF MAHTO | Prestressed Stringer/Multi-beam or girder | -- | 2010 | -- | 98.1 | 100.1 | Good | 99.8 | 00000000000A152 |
| NBI report | IRR SD065 | GRAND RV | 15 N DEWEY CO LINE | Prestressed Stringer/Multi-beam or girder (4 spans) | -- | 2012 | -- | 103.0 | 398.6 | Good | 97.9 | 000000016323181 |
| NBI report | W. BULLHEAD ROAD | WHITE SHIRT CK | 2.4E & 9.7S MCINTOSH | Concrete Culvert (2 spans) | -- | 2016 | -- | 14.1 | 28.5 | Good | 99.9 | 000000016354116 |