Bridge conditions in Coos County, New Hampshire
189 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
10 of the 189 bridges the federal inventory lists in Coos County are rated poor; the rest split 93 good and 86 fair.
- 10 of the 189 bridges in Coos County, New Hampshire, are rated in poor condition (5.3%) in the 2025 National Bridge Inventory, as of .
- 93 bridges (49.2%) are rated good and 86 (45.5%) fair.
- The median Coos County bridge was built in 1965.
- The busiest poor-rated bridge is US 2 over Pea Brook (built 1932), carrying about 4,334 vehicles a day.
Good 49.2% · Fair 45.5% · Poor 5.3% of 189 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 |
|---|---|---|---|
| US 2 over Pea Brook | 1932 | 4,334 | Poor |
| Carleton Hill Road over Mohawk River | 1935 | 451 | Poor |
| North Road over Androscoggin River | 1900 | 281 | Poor |
| Hill Road over Perry Stream | 1860 | 191 | Poor |
| Chickwolnepy Road over Chickwolnepy Stream | 1950 | 96 | Poor |
| Stearns Brook Road over Stearns Brook | 1950 | 96 | Poor |
| Murphy Dam Road over Dam Spillway | 1938 | 96 | Poor |
| Leighton Meadow Rd over Phillips Brook | 1940 | 96 | Poor |
| Village Road over Clement Brook | 1929 | 44 | Poor |
| Old Nh 16 over Thompson Brook | 1931 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 2 Nh 16 over Moose River | 1939 | 10,406 | Good |
| Nh 16 over Moose Brook | 1972 | 10,237 | Fair |
| US 3 NH116 NH142 over Johns River | 1938 | 9,718 | Fair |
| US 2 US 3 over Israel River | 1990 | 9,175 | Good |
| US 3 over Upper Ammonoosuc River | 1995 | 5,412 | Good |
| US 2 over Recreational Trail | 1960 | 5,195 | Good |
| US 2 over Moose River | 1966 | 5,195 | Good |
| US 2 over Cold Brook | 1966 | 5,195 | Fair |
| US 2 over Snyder Brook | 1966 | 5,195 | Fair |
| US 2 over Moose River | 1966 | 5,195 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of New Hampshire: New Hampshire 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.