Bridge conditions in Carroll County, Maryland
205 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
10 of the 205 bridges the federal inventory lists in Carroll County are rated poor; the rest split 57 good and 138 fair.
- 10 of the 205 bridges in Carroll County, Maryland, are rated in poor condition (4.9%) in the 2025 National Bridge Inventory, as of .
- 57 bridges (27.8%) are rated good and 138 (67.3%) fair.
- The median Carroll County bridge was built in 1974.
- The busiest poor-rated bridge is Md 26 over Liberty Reservoir (built 1954), carrying about 20,192 vehicles a day.
Good 27.8% · Fair 67.3% · Poor 4.9% of 205 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 |
|---|---|---|---|
| Md 26 over Liberty Reservoir | 1954 | 20,192 | Poor |
| Stone Chapel Road over Little Pipe Creek | 1930 | 4,612 | Poor |
| Upper Beckleysvill over Murphy Run | 1960 | 1,745 | Poor |
| Brown Road over Roaring Run | 1985 | 395 | Poor |
| Mummaford Road over Monocacy River | 1911 | 268 | Poor |
| Mckinstry Mill Rd over Little Pipe Creek | 1900 | 234 | Poor |
| Old Kays Mill Road over Beaver Run | 1974 | 209 | Poor |
| Patapsco Road over East Br Patapsco River | 1900 | 171 | Poor |
| Hughes Shop Road over Bear Branch | 1974 | 152 | Poor |
| Mckinstrys Mill Rd over Sams Creek | 1972 | 119 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 70 EB over Md 27 | 1974 | 65,550 | Fair |
| Is 70 WB over Md 27 | 1974 | 65,550 | Fair |
| Md 140 WB & Ramp B over Md 97 | 2006 | 47,060 | Good |
| Md 140 EB over Md 97 | 2006 | 47,060 | Good |
| Md 140 over Md Mid RR MD27 West Br | 2006 | 45,521 | Good |
| Md 32 over Piney Run | 1957 | 26,590 | Fair |
| Md 26 over Md 97 | 1962 | 25,970 | Fair |
| Md 26 over Liberty Reservoir | 1954 | 20,192 | Fair |
| Md 26 over Liberty Reservoir | 1954 | 20,192 | Poor |
| Md 27 over Maryland Midland RR | 1959 | 18,790 | 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.