A bridge's favorite type of music? Heavy metal. Or suspension... it depends.
A bridge's favorite type of music? Heavy metal. Or suspension... it depends.
Infrastructure Grade
Infrastructure Report Card
16.1% of bridges in poor condition
Total Bridges
5,883
Poor Condition
945(16.1%)
Avg Bridge Age
50 yrs
Trend
Improving
| Metric | South Dakota | National Avg | Trend |
|---|---|---|---|
| % Poor Condition | 16.1% | 6.7% | Improving |
| vs. National Average | +9.4 pts | -- | -- |
| Average Bridge Age | 50 yrs | 48 yrs | -- |
| Good or Better | 1,870(31.8%) | -- | -- |
Grade Scale
Percentage of bridges in poor condition over time. The dashed line shows the national average for comparison.
Total Bridges
5,883
Poor Condition
945(16.1%)
Average Age
50 yrs
Daily Crossings
8.3M
Good or Better
1,870(31.8%)
These bridges have at least one major component rated "5" (Fair) — one step above the poor threshold. Sorted by daily traffic to highlight highest-impact structures at risk.
| Bridge | Location | Deck | Super | Sub | Daily Traffic |
|---|---|---|---|---|---|
| SD079NF | Pennington County | 5 | 5 | 6 | 23,179 |
| ST PATRICK ST | Pennington County | 5 | 5 | 7 | 18,140 |
| SD044 | Pennington County | 5 | 6 | 6 | 17,569 |
| I090 E | Minnehaha County | 6 | 6 | 5 | 15,553 |
| S. CLIFF AVENUE | Minnehaha County | 5 | 5 | 5 | 14,800 |
| CLIFF AVENUE | Minnehaha County | 5 | 6 | 6 | 13,370 |
| 11TH STREET | Minnehaha County | 5 | 5 | 5 | 12,500 |
| I090 E | Pennington County | 6 | 5 | 5 | 12,395 |
| I090 E | Meade County | 5 | 5 | 6 | 11,863 |
| I090 W | Meade County | 5 | 5 | 6 | 11,863 |
| US014A PINE ST | Lawrence County | 5 | 7 | 5 | 11,370 |
| 60TH STREET NORTH | Minnehaha County | 5 | 5 | 5 | 11,300 |
| 60TH STREET NORTH | Minnehaha County | 5 | 7 | 5 | 11,300 |
| 10TH STREET | Minnehaha County | 5 | 5 | 5 | 10,900 |
| US212 | Codington County | 5 | 5 | 6 | 10,862 |
The 10 bridges in poorest condition, ranked by lowest sufficiency rating.
over VERMILLION RV
over VERMILLION RV
over WOLF CK
over CLAY CK DITCH
over STRAY HORSE CK
over CHOTEAU CREEK
over COUNTY RD RC P&E RR
over TURTLE CK
over CAIN CK
over PEARL CK
States with similar infrastructure profiles, ranked by percentage of bridges in poor condition.
Grading: Grades are based on the percentage of bridges classified as "poor condition." A bridge is in poor condition when at least one major component (deck, superstructure, or substructure) is rated 4 or below on the NBI 0-9 scale.
Data Source: Federal Highway Administration (FHWA) National Bridge Inventory (NBI). Data is updated annually. BridgeStats is not affiliated with or endorsed by the FHWA.
Watchlist Criteria: Bridges with any component rated "5" (Fair) are one step from the poor threshold of 4 and are flagged for monitoring. These bridges are not yet in poor condition but may deteriorate without maintenance.