Structure 200000F-2402030 · Frederick County, MD
Carries Mount Phillip Road over Branch Of Rock Creek, 230 S Of US Alt 40.
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 | Frederick |
| Location | 230 S Of US Alt 40 |
| Carries | Mount Phillip Road |
| Crosses | Branch Of Rock Creek |
| Coordinates | 39.41929, -77.46619 |
| Material | Steel |
| Design | Culvert |
| Total Length | 20.0 ft (6.1 m) |
| Deck Area | 39.0 sq m |
| Year Built | 1980 |
| Avg Daily Traffic | 5,847 (2022) |
| Truck Traffic | 20% |
| 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 | 200000F-2402030 |
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.