Bridge conditions in Frederick County, Maryland
485 inventoried bridges · 14 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
14 of the 485 bridges the federal inventory lists in Frederick County are rated poor; the rest split 196 good and 275 fair.
- 14 of the 485 bridges in Frederick County, Maryland, are rated in poor condition (2.9%) in the 2025 National Bridge Inventory, as of .
- 196 bridges (40.4%) are rated good and 275 (56.7%) fair.
- The median Frederick County bridge was built in 1976.
- The busiest poor-rated bridge is Baughmans Lane over Rock Creek (built 1970), carrying about 20,388 vehicles a day.
Good 40.4% · Fair 56.7% · Poor 2.9% of 485 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Baughmans Lane over Rock Creek | 1970 | 20,388 | Poor |
| Frederick Road over Hunting Creek | 1928 | 9,402 | Poor |
| Shookstown Road over Carroll Creek | 1911 | 6,750 | Poor |
| Fairview Avenue over Carroll Creek | 1963 | 2,674 | Poor |
| Lynn Burke Road over Church Branch | 1965 | 2,175 | Poor |
| Opossumtown Pike over Big Tuscarora Creek | 1988 | 1,070 | Poor |
| Brethren Church Rd over Catoctin Creek | 1986 | 851 | Poor |
| Hessong Bridge Rd over Fishing Creek | 1931 | 761 | Poor |
| Lily Pons Road over Locust Run | 1977 | 394 | Poor |
| Poffenberger Road over Catoctin Creek | 1878 | 390 | Poor |
| Old Kiln Road over Little Owens Creek | 1975 | 338 | Poor |
| Black Ankle Road over Talbot Branch | 1979 | 278 | Poor |
| Hornets Nest Road over Friends Creek | 1981 | 179 | Poor |
| Old Mill Road over Maryland Midland Railroa | 1975 | 97 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 270 over MD 85 (Buckeystown Pike) | 2020 | 111,550 | Good |
| US 15 & Ramp 8 over Carroll Creek | 1958 | 95,190 | Fair |
| US 15 Nbr over US 40/W. Patrick Street | 1958 | 95,190 | Fair |
| US 15 Sbr over US 40/W. Patrick Street | 1958 | 95,190 | Fair |
| Is 70 Ebr over Md 180 | 1968 | 94,760 | Fair |
| Is 70 Wbr over Md 180 | 1968 | 94,760 | Fair |
| Is 70 Wbr over US 40 Ebr(ramp 5) | 2002 | 94,760 | Good |
| US 15 Nbr over Rosemont Ave | 1958 | 93,930 | Fair |
| US 15 Sbr over Rosemont Ave | 1968 | 93,930 | Fair |
| Is 70 Ebr over US 15 | 1968 | 89,580 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Maryland: Maryland bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.