Maine bridges
Maine reports 2,542 bridges and culverts across 16 counties. 392 (15.4%) are rated in poor condition, and 150 are posted with load limits or closed. The oldest structure still in the inventory dates from 1854.
Find a bridge in Maine
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Counties
Circle size reflects the number of bridgesCondition
Good25%(637)
Fair60%(1,513)
Poor15%(392)
Counties with the highest share of poor bridges
- Hancock County24.6% of 69
- Somerset County23.1% of 173
- Franklin County22.5% of 129
- Piscataquis County21.3% of 80
- Washington County19.8% of 111
Structure types
| Structure type | Bridges | Share |
|---|---|---|
| Stringer/Multi-beam or Girder | 1,277 | 50.2% |
| Culvert | 413 | 16.2% |
| Slab | 365 | 14.4% |
| Tee Beam | 232 | 9.1% |
| Frame | 56 | 2.2% |
| Box Beam or Girders - Multiple | 54 | 2.1% |
| Girder and Floorbeam System | 36 | 1.4% |
| Truss - Thru | 33 | 1.3% |
| Arch - Deck | 31 | 1.2% |
| Movable - Lift | 11 | 0.4% |
| Box Beam or Girders - Single or Spread | 10 | 0.4% |
| Segmental Box Girder | 6 | 0.2% |
| Truss - Deck | 4 | 0.2% |
| Arch - Thru | 3 | 0.1% |
| Movable - Bascule | 3 | 0.1% |
| Movable - Swing | 3 | 0.1% |
| Suspension | 2 | 0.1% |
| Other | 2 | 0.1% |
| Stayed Girder | 1 | 0.0% |
When Maine's bridges were built
Busiest
- I 295 NB over Back Bay (atlantic O)FairCumberland County · 42,190 vehicles/day
- I 95 over Eliot RDFairYork County · 41,190 vehicles/day
- I-95 over Dennett RoadFairYork County · 40,420 vehicles/day
- I 95 over Piscataqua River RTE 103FairYork County · 40,420 vehicles/day
- I 295 SB over US1 Forest AveFairCumberland County · 37,920 vehicles/day
Longest
- Casco Bay Bridge over Fore RiverFairCumberland County · 4,748 ft
- I 95 over Piscataqua River RTE 103FairYork County · 4,000 ft
- Leeman HWY over Kennebec RiverGoodSagadahoc County · 2,982 ft
- US 1 Byp over Piscataqua River & RoadsGoodYork County · 2,785 ft
- Route 1 over Sheepscot RiverFairLincoln County · 2,730 ft
Oldest
- Water Street over Bond BrookPoorKennebec County · Built 1854
- Frog Aly over Old Course of Saco RiverFairOxford County · Built 1857
- Covered Bridge RD over Ellis RiverFairOxford County · Built 1868
- Covered Bridge RD over Kenduskeag StreamFairPenobscot County · Built 1876
- Wire Bridge RD over Carrabasset RiverFairSomerset County · Built 1886
Newest
- Mallett DR over I 295 NB & SBGoodCumberland County · Built 2025
- Desert RD over I 295 NB & SBGoodCumberland County · Built 2025
- Belfast RD over Spring BrookGoodKnox County · Built 2025
- I 295 SB over Route US 1 NB & SBGoodCumberland County · Built 2024
- I 295 NB over Route US 1 NB &sbGoodCumberland County · Built 2024
Who owns Maine's bridges
| State | 2,041 | 80.3% |
| Town / Township | 232 | 9.1% |
| Toll Authority | 175 | 6.9% |
| Federal | 54 | 2.1% |
| Railroad | 21 | 0.8% |
| County | 18 | 0.7% |
| Unknown | 1 | 0.0% |
More Maine facts
Total bridge length64 miles
Total deck area13,911,350 sq ft
Culverts counted as bridges413 (16%)
On the National Highway System531
Posted with load limits128
Closed to traffic22
Listed or eligible for the National Register61
Average daily traffic per bridge4,188 vehicles
Newest structure2025