Scour-Critical Bridges in Tennessee
Tennessee has 593 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.
How this ranking works
This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.
| Bridge | County | Scour Rating | Daily Traffic | Condition |
|---|---|---|---|---|
| I24 over Red River | Montgomery | 3 — Serious | 88,998 | Fair |
| I75 over Harris Creek | Bradley | 3 — Serious | 52,149 | Fair |
| I24 over Sequatchie River | Marion | 3 — Serious | 52,102 | Poor |
| I24 over Sequatchie River | Marion | 3 — Serious | 52,102 | Poor |
| I75 over Hiwassee River | Bradley | 3 — Serious | 48,545 | Fair |
| I75 over Hiwassee River | Bradley | 3 — Serious | 48,545 | Fair |
| I75 Nbl over Mouse Creek | McMinn | 3 — Serious | 47,306 | Good |
| I75 Sbl over Mouse Creek | McMinn | 3 — Serious | 47,306 | Fair |
| Fap 5 over Bond Creek | Madison | 3 — Serious | 44,043 | Fair |
| I40 over Cub Creek | Madison | 3 — Serious | 41,499 | Fair |
| I40 over Cub Creek | Madison | 3 — Serious | 41,499 | Fair |
| I40 over Cypress Creek | Madison | 3 — Serious | 41,152 | Fair |
| I40 over Cypress Creek | Madison | 3 — Serious | 41,152 | Fair |
| I24 Ebl over Wolf Creek | Coffee | 3 — Serious | 37,703 | Fair |
| I24 Wbl over Wolf Creek | Coffee | 3 — Serious | 37,703 | Fair |
| I24 over Big Fiery Gizzard Creek | Marion | 3 — Serious | 36,821 | Fair |
| I24 over Big Fiery Gizzard Creek | Marion | 3 — Serious | 36,821 | Good |
| I40 over Branch | Haywood | 3 — Serious | 36,373 | Fair |
| I40 over Branch | Haywood | 3 — Serious | 36,373 | Fair |
| Fap 29 Nbl over N. Chickamauga Creek | Hamilton | 3 — Serious | 35,457 | Fair |
| Fap 29 Sbl over N. Chickamauga Creek | Hamilton | 3 — Serious | 35,457 | Fair |
| I40 over Buffalo River | Humphreys | 3 — Serious | 35,368 | Fair |
| I40 over Buffalo River | Humphreys | 3 — Serious | 35,368 | Fair |
| Fau 5395 over S. Chickamauga Creek | Hamilton | 3 — Serious | 31,976 | Fair |
| Fap 5 over Middle Fk.forked Deer Ri | Madison | 3 — Serious | 30,652 | Fair |
| Fap 5 over Middle Fk.forked Deer Ri | Madison | 3 — Serious | 30,652 | Fair |
| I40 over Pigeon River | Cocke | 3 — Serious | 29,828 | Fair |
| I40 over Pigeon River | Cocke | 3 — Serious | 29,828 | Poor |
| Fau 319 over North Chickamauga Creek | Hamilton | 3 — Serious | 27,012 | Fair |
| Fas 15 over W. Fk. Fletcher Creek | Shelby | 3 — Serious | 26,269 | Fair |
| Fap 7 over Duck River | Maury | 3 — Serious | 24,920 | Fair |
| Fap 7 over Duck River | Maury | 3 — Serious | 24,920 | Fair |
| Fap 10 over SR 10 Rl / Elk River | Lincoln | 3 — Serious | 24,286 | Fair |
| Fap 29 over Richland Creek | Rhea | 3 — Serious | 23,414 | Fair |
| Fap 29 over Richland Creek | Rhea | 3 — Serious | 23,414 | Fair |
| Fap 67 over Doe River | Carter | 2 — Critical | 22,653 | Poor |
| Fau 2821 over Wolf River | Shelby | 3 — Serious | 21,144 | Fair |
| Fap 431 over Hoosier Creek | Obion | 3 — Serious | 19,597 | Fair |
| Fau 2867 over Branch | Shelby | 3 — Serious | 18,528 | Fair |
| Fap 5 over Bear Creek | Madison | 3 — Serious | 18,146 | Poor |
| Fap 1 over Clear Creek | Shelby | 3 — Serious | 17,719 | Fair |
| Fap 5 over Turkey Creek | Chester | 3 — Serious | 17,225 | Fair |
| Fap 29 846733h over Emory River | Roane | 3 — Serious | 16,817 | Fair |
| Fas 204 over Loosahatchie River | Shelby | 3 — Serious | 16,419 | Fair |
| Fap 3 over Indian CR Drainage Canal | Tipton | 3 — Serious | 16,405 | Poor |
| Fap 3 over Branch | Tipton | 3 — Serious | 16,405 | Poor |
| Fap 29 over Little Richland Creek | Rhea | 3 — Serious | 15,352 | Fair |
| Fap 29 over Little Richland Creek | Rhea | 3 — Serious | 15,352 | Fair |
| Fau 5092 over Nonconnah Creek | Shelby | 3 — Serious | 14,539 | Fair |
| Fap 57 over Branch | Shelby | 3 — Serious | 14,335 | Fair |
| Fap 3 over North Fork Cane Creek | Lauderdale | 3 — Serious | 13,622 | Fair |
| Fap 3 over North Fork Cane Creek | Lauderdale | 3 — Serious | 13,622 | Fair |
| Fap 76 over Town Creek | Henry | 3 — Serious | 13,461 | Fair |
| I26 RT LN over Indian Creek | Unicoi | 3 — Serious | 12,654 | Good |
| I26 Lt LN over Indian Creek | Unicoi | 3 — Serious | 12,654 | Good |
| I26 Lt LN over Nolichucky River | Unicoi | 0 — Bridge closed | 12,654 | Poor |
| Fap 3 over Mill Creek | Lauderdale | 3 — Serious | 11,840 | Fair |
| Fap 3 over Mill Creek | Lauderdale | 3 — Serious | 11,840 | Fair |
| Fap 431 over Grove Creek | Obion | 3 — Serious | 11,770 | Fair |
| I155 over Mississippi River | Dyer | 3 — Serious | 11,561 | Fair |
| I155 over Obion River | Dyer | 3 — Serious | 11,456 | Fair |
| I155 over Obion River | Dyer | 3 — Serious | 11,456 | Fair |
| Fap 3 over Obion River | Obion | 3 — Serious | 11,306 | Fair |
| Fap 3 over Obion River | Obion | 3 — Serious | 11,306 | Good |
| Fap 3 over Overflow | Obion | 3 — Serious | 11,306 | Good |
| Fap 3 over Overflow | Obion | 3 — Serious | 11,306 | Fair |
| Fap 3 over Old Obion Rv Drain Can | Obion | 3 — Serious | 11,306 | Good |
| Fap 3 over Old Obion Rv Drain Can | Obion | 3 — Serious | 11,306 | Good |
| Fap 3 over Obion River | Obion | 3 — Serious | 11,306 | Fair |
| Fap 3 over Obion River | Obion | 3 — Serious | 11,306 | Fair |
| Fap 22 (rt Ln) over Mud Creek | Weakley | 3 — Serious | 11,265 | Fair |
| Fap 22 (lt Ln) over Mud Creek | Weakley | 3 — Serious | 11,265 | Good |
| Fap 22 (rt. Ln.) over Chestnut Branch | Weakley | 3 — Serious | 11,265 | Fair |
| Fap 22 (lt Ln) over Chestnut Branch | Weakley | 3 — Serious | 11,265 | Fair |
| Fap 107 over Nolichucky River | Greene | 0 — Bridge closed | 11,190 | Poor |
| Nfa 990 (sa 9425) over Harpeth River | Williamson | 3 — Serious | 11,007 | Poor |
| Fap 15 over Crooked Creek | McNairy | 3 — Serious | 10,669 | Fair |
| Fau 2823 over Wolf River | Shelby | 3 — Serious | 10,454 | Poor |
| Fap 3 over N. Fk. Forked Deer River | Dyer | 3 — Serious | 10,376 | Fair |
| Fap 3 over N. Fk. Forked Deer River | Dyer | 3 — Serious | 10,376 | Fair |
| Fap 5 over N. Fk. Forked Deer River | Gibson | 3 — Serious | 10,097 | Fair |
| Fas 1 over Branch | Madison | 3 — Serious | 10,030 | Fair |
| Fas 1 over Branch | Madison | 3 — Serious | 10,030 | Fair |
| Fap 3 over S. Fk. Forked Deer River | Dyer | 3 — Serious | 9,555 | Good |
| Fap 3 over S. Fk. Forked Deer River | Dyer | 3 — Serious | 9,555 | Good |
| Fap 3 over Overflow | Dyer | 3 — Serious | 9,555 | Fair |
| Fap 3 over Overflow | Dyer | 3 — Serious | 9,555 | Fair |
| Fau 3042 over Sandy Creek | Madison | 3 — Serious | 9,543 | Fair |
| Fau 2162 (sa 3308) over Chickamauga Creek | Hamilton | 3 — Serious | 9,401 | Fair |
| Fau 388 Rl over Loosahatchie River | Shelby | 3 — Serious | 9,352 | Poor |
| Fap 1 over Oliver Creek | Shelby | 3 — Serious | 9,349 | Fair |
| Fap 1 over Culvert Branch | Humphreys | 3 — Serious | 9,234 | Good |
| Fap 3 over Double Branch | Lauderdale | 3 — Serious | 9,213 | Fair |
| Fap 3 over Double Branch | Lauderdale | 3 — Serious | 9,213 | Fair |
| Fap 3 over Sumrow Creek | Lauderdale | 3 — Serious | 9,213 | Fair |
| Fap 3 over Sumrow Creek | Lauderdale | 3 — Serious | 9,213 | Fair |
| Fau 5089 over Branch | Shelby | 3 — Serious | 9,213 | Fair |
| Fau 5089 over Branch | Shelby | 3 — Serious | 9,213 | Fair |
| Fau 5757 over Wolf River | Shelby | 3 — Serious | 8,449 | Poor |
| Fau 5571 (sa 7905) over Branch | Shelby | 3 — Serious | 8,367 | Fair |
| Fau 2231 over Franks Branch | Shelby | 3 — Serious | 8,054 | Fair |
| Fap 22 over Piney Creek | Henderson | 3 — Serious | 7,993 | Poor |
| Fau 130 over Rock Creek | Coffee | 3 — Serious | 7,783 | Fair |
| Fap 14 over West Beaver Creek | Shelby | 3 — Serious | 7,621 | Fair |
| Fas 1 over Branch | Madison | 3 — Serious | 7,620 | Fair |
| Fas 1 over Branch | Madison | 3 — Serious | 7,620 | Fair |
| Fau 1226 (sa 7310) over Emory River | Roane | 3 — Serious | 7,216 | Poor |
| Fap 57 over Chambers Creek | Hardin | 3 — Serious | 7,175 | Fair |
| Fau 4049 (sa 7905) over Branch | Shelby | 3 — Serious | 7,042 | Fair |
| Fap 18 over Overflow | Hardeman | 3 — Serious | 6,835 | Fair |
| Fap 18 over Overflow | Hardeman | 3 — Serious | 6,835 | Fair |
| Fau 951 (sa 3307) over North Chickamauga Creek | Hamilton | 3 — Serious | 6,505 | Good |
| Fap 100 over S. Fk. Forked Deer River | Chester | 3 — Serious | 6,381 | Fair |
| Fap 100 over Jacks Creek | Chester | 3 — Serious | 6,381 | Fair |
| Fap 18 over Clover Creek | Hardeman | 3 — Serious | 6,118 | Fair |
| Nfa 1459 (sa 7914) over Branch | Shelby | 3 — Serious | 6,075 | Fair |
| Fap 1 over Hunting Creek | Benton | 3 — Serious | 5,761 | Fair |
| Fap 1 over Spring Creek | Madison | 3 — Serious | 5,674 | Fair |
| Fap 15 over Spring Creek | Hardeman | 3 — Serious | 5,658 | Poor |
| Fas 194 over Cypress Creek | Fayette | 3 — Serious | 5,631 | Fair |
| Fap 1 over Overflow | Carroll | 3 — Serious | 5,624 | Fair |
| Fap 1 over Overflow | Carroll | 3 — Serious | 5,624 | Fair |
| Fap 1 over Big Sandy River | Carroll | 3 — Serious | 5,624 | Fair |
| Fap 1 over Overflow | Carroll | 3 — Serious | 5,624 | Fair |
| Fas 39 over Middle Creek | McMinn | 3 — Serious | 5,610 | Poor |
| Fap 22 over Sam Bishop Ditch | McNairy | 3 — Serious | 5,579 | Poor |
| Fap 22 over N. Fork White Oak Creek | McNairy | 3 — Serious | 5,579 | Poor |
| Fas 1 over Branch | Haywood | 3 — Serious | 5,411 | Fair |
| Nfa 1286 (sa 7821) over Bird Creek | Sevier | 3 — Serious | 5,400 | Good |
| Fau 2837 over Cypress Creek | Shelby | 3 — Serious | 5,393 | Fair |
| Fap 76 over Loosahatchie River | Fayette | 3 — Serious | 5,388 | Poor |
| Fau 5203 over Cane Creek | Shelby | 3 — Serious | 5,309 | Poor |
| Fap 69 over Cub Creek | Decatur | 3 — Serious | 5,257 | Fair |
| Fap 28 over Hicks Creek | Sequatchie | 3 — Serious | 5,192 | Fair |
| Fap 69 over Birdsong Creek | Benton | 3 — Serious | 5,176 | Fair |
| Fap 69 over Birdsong Creek Overflow | Benton | 3 — Serious | 5,176 | Fair |
| Fas 378 over Richland Creek | Rhea | 3 — Serious | 5,170 | Fair |
| Fap 69 over Big Sandy River | Henry | 3 — Serious | 5,165 | Fair |
| Fas 2 over Branch | Coffee | 3 — Serious | 5,073 | Fair |
| Fap 56 over Mountain Creek | Warren | 3 — Serious | 4,984 | Fair |
| Fap 69 over West Sandy Creek | Henry | 3 — Serious | 4,939 | Fair |
| Fap 81 over Nolichucky River | Washington | 0 — Bridge closed | 4,903 | Poor |
| Fap 125 over S.colonel Creek | Hardeman | 3 — Serious | 4,763 | Fair |
| Fas 1 over Mud Creek | Haywood | 3 — Serious | 4,572 | Fair |
| Fap 1 over E. Fork Beaver Ck Canal | Tipton | 3 — Serious | 4,571 | Fair |
| Fap 1 over M. Fk. Forked Deer River | Carroll | 3 — Serious | 4,494 | Fair |
| Fau 4199 over Little Richland Creek | Rhea | 3 — Serious | 4,449 | Fair |
| Nfa 922 over Hatchel Creek | Tipton | 3 — Serious | 4,380 | Fair |
| Fap 125 over Spring Creek | Hardeman | 3 — Serious | 4,351 | Poor |
| Fap 125 over Branch | Hardeman | 3 — Serious | 4,351 | Fair |
| Fap 13 350842m over Trace Creek | Humphreys | 3 — Serious | 4,347 | Poor |
| Fap 77 over Overflow | Gibson | 3 — Serious | 4,305 | Fair |
| Fas 283 over Sequatchie River | Marion | 3 — Serious | 4,237 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 4,193 | Fair |
| Fap 76 over Jacocks Creek | Haywood | 3 — Serious | 4,193 | Fair |
| Fap 76 over Mud Creek | Haywood | 3 — Serious | 4,193 | Fair |
| Fap 1 over Reedy Creek | Carroll | 3 — Serious | 4,139 | Fair |
| Fap 22 over Middletons Creek | Chester | 3 — Serious | 3,887 | Fair |
| Fas 69 over Jones Bend Creek | Henry | 3 — Serious | 3,729 | Good |
| Fap 78 over Drainage Canal | Dyer | 3 — Serious | 3,574 | Fair |
| Fap 78 over Drainage Canal | Dyer | 3 — Serious | 3,574 | Poor |
| Fau 5757 over Marys Creek | Shelby | 3 — Serious | 3,574 | Fair |
| Fap 69 over Lick Creek | Decatur | 3 — Serious | 3,516 | Fair |
| Fap 68 over Spring Branch | Cumberland | 3 — Serious | 3,482 | Fair |
| Fap 68 over Grassy Cove Creek | Cumberland | 3 — Serious | 3,482 | Fair |
| Fap 68 over Grassy Cove Creek | Cumberland | 3 — Serious | 3,482 | Fair |
| Fap 57 over Lick Creek | McNairy | 3 — Serious | 3,482 | Fair |
| Fas 50 over Overflow Duck River | Hickman | 3 — Serious | 3,281 | Fair |
| Fas 50 over Duck River | Hickman | 3 — Serious | 3,281 | Fair |
| Nfa 2178 over Oliver Creek | Shelby | 3 — Serious | 3,189 | Fair |
| Fau 104 over Overflow | Dyer | 3 — Serious | 3,134 | Good |
| Nfa K641 over Loosahatchie River | Shelby | 3 — Serious | 3,132 | Poor |
| Fap 5 over Overflow | Obion | 3 — Serious | 3,114 | Fair |
| Fap 5 over Obion River | Obion | 3 — Serious | 3,114 | Fair |
| Fas 69 over West Sandy Creek | Henry | 3 — Serious | 3,025 | Fair |
| Fas 69 over Beason Creek | Hardin | 3 — Serious | 2,990 | Fair |
| Fap 76 over Poplar Creek | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Bear Creek | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 76 over Overflow | Haywood | 3 — Serious | 2,897 | Fair |
| Fap 11 over Shoal Creek | Giles | 3 — Serious | 2,874 | Fair |
| Fap 73 over Pigeon River | Cocke | 3 — Serious | 2,861 | Good |
| Fap 50 over Duck River | Hickman | 3 — Serious | 2,848 | Fair |
| Fas 1 over Cypress Creek | Madison | 3 — Serious | 2,836 | Fair |
| Fas 1 over Robertson Creek | Madison | 3 — Serious | 2,836 | Fair |
| Fas 1 over Cub Creek | Madison | 3 — Serious | 2,836 | Fair |
| Fap 14 over Branch | Tipton | 3 — Serious | 2,822 | Fair |
| Fap 14 over Beaver Creek | Tipton | 3 — Serious | 2,822 | Fair |
| Nfa 958 (sa 1111) over Sycamore Creek | Cheatham | 3 — Serious | 2,630 | Fair |
| Nfa 4748 (sa 9427) over Harpeth River | Williamson | 3 — Serious | 2,592 | Fair |
| Fas 203 over English Creek | Hardin | 3 — Serious | 2,585 | Fair |
| Nfa 1476 over Hatchel Creek | Tipton | 3 — Serious | 2,571 | Fair |