Structure 200000SM0070030 · St. Mary's County, MD
Carries Stoney Run Drive over Warehouse Run, 1 Mi W Of Flat Iron Road.
A culvert 20 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.
| State | Maryland |
| County | St. Mary's |
| Location | 1 Mi W Of Flat Iron Road |
| Carries | Stoney Run Drive |
| Crosses | Warehouse Run |
| Coordinates | 38.26312, -76.49908 |
| Material | Steel |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 7.9 ft (2.4 m) |
| Deck Area | 40.9 sq m |
| Year Built | 1995 |
| Avg Daily Traffic | 478 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 200000SM0070030 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.