Total bridges
64
Public highway bridges in Sagadahoc County
County profile · official public datasets
Sagadahoc County, ME
64 public highway bridges tracked in the FHWA National Bridge Inventory: 26.6% rated Good, 60.9% Fair, 12.5% Poor.
- 64
- Public bridges
- 26.6%
- Good condition
- 12.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Sagadahoc County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 38%
- lowest Poor share in state
- 12.5%
- Poor-condition share
- 64
- public highway bridges
- 1976
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Sagadahoc County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Sagadahoc County ranks #6 of 16 Maine counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.5%). Sagadahoc County, Maine contains 64 public highway bridges. Roughly 26.6% are rated “Good,” 60.9% “Fair,” and 12.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
26.6%
17 of 64 rated 7-9
Fair condition
60.9%
39 of 64 rated 5-6
Poor condition
12.5%
8 of 64 rated 4 or below
In-state Poor-share rank
#6 of 16
Among Maine counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 64 NBI-tracked bridges by lowest applicable component rating.
Good 26.6% (17)
Fair 60.9% (39)
Poor 12.5% (8)
Sagadahoc County's Poor-condition bridges carry 26,977 vehicle crossings a day
That is 7.2% of the county's reported daily bridge traffic on 12.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,372 crossings a day against 4,909 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 64 of 64 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
45.3% of Sagadahoc County's bridges have passed the 50-year mark
29 of the 64 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 26.6% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 70.2% of the county's Poor-condition bridge traffic
MAIN ST over M C RR & A MARSH, built 1933, carries 18,940 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 8-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 26,977 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Sagadahoc County's bridges were built
64 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 4
1930–1939
4 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s
1950–1959
9 bridges
- 1960s 4
1960–1969
4 bridges
- 1970s
1970–1979
19 bridges
- 1980s 3
1980–1989
3 bridges
- 1990s
1990–1999
8 bridges
- 2000s 6
2000–2009
6 bridges
- 2010s 3
2010–2019
3 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1970s, when 19 of the county's bridges still in the inventory were built, which is 29.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1976, 6 years newer than the Maine average of 1970.
How Sagadahoc County compares with Maine's closest counties by inventory size
The 5 Maine counties nearest Sagadahoc County in number of bridges, with their condition splits. Its 12.5% Poor share is the 2nd-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1967 is 9 years newer.
Showing the 5 closest of 15 Maine counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Waldo County | 92 | 16.3% | 66.3% | 17.4% | 1964 |
| Piscataquis County | 80 | 18.8% | 60% | 21.3% | 1966 |
| Hancock County | 70 | 21.4% | 55.7% | 22.9% | 1964 |
| Sagadahoc County (this page) | 64 | 26.6% | 60.9% | 12.5% | 1976 |
| Lincoln County | 63 | 25.4% | 63.5% | 11.1% | 1972 |
| Knox County | 53 | 26.4% | 54.7% | 18.9% | 1970 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Sagadahoc County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Sagadahoc County, both outside Maine so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside ME (64 bridges here).
- Southeast Fairbanks County, AK · 64 bridges
- Delta County, CO · 64 bridges
- Sedgwick County, CO · 64 bridges
- Hancock County, GA · 64 bridges
Similar average build year
Nearest mean year-built outside ME (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (64)
ALEXANDER REED RD
GoodOver: ABAGADASSETT RIVER
.4 E OF I-295, Sagadahoc, ME
Built 2022 Load: 42.8 t ADT: 451
OAK GROVE AV
GoodOver: M.D.O.T. RAILROAD
.4 MI N JCT CONGRESS AVE, Sagadahoc, ME
Built 1999 Load: 46.7 t ADT: 2,820
DINGLEY RD
GoodOver: MALLON BK
2.1 MI. S. RTE. 138, Sagadahoc, ME
Built 2022 Load: 46.7 t ADT: 152
NEQUASSET RD
GoodOver: SMO RAILROAD
0.4 MI N LY OF RTE 1, Sagadahoc, ME
Built 1999 Load: 53.8 t ADT: 598
BYPASS DR
GoodOver: ROUTE 24 MIDDLESEX RD
1.4 MI E JCT RTE US 201, Sagadahoc, ME
Built 1997 Load: 57.3 t ADT: 22,360
MAIN ST
GoodOver: ABAGABASSETT RIVER
1.3 MI ELY OF I-295, Sagadahoc, ME
Built 1976 Load: 64.5 t ADT: 4,320
BROWNS POINT RD
PoorOver: ABAGADASSET RIVER
1.7 MI W OF JCT RTE 24, Sagadahoc, ME
Built 1949 Load: 13.0 t ADT: 366
CATHANCE RD
PoorOver: CATHANCE RIVER
2.5 MI S TOWNLINE, Sagadahoc, ME
Built 1920 Load: 15.2 t ADT: 1,089
OLD STAGE RD
PoorOver: MONSTWEAG BROOK
0.8 MI W OLD BATH RD, Sagadahoc, ME
Built 1991 Load: 18.5 t ADT: 378
LANGDON RD
PoorOver: ABAGADASET RIVER
2.5 MI E OF JCT RTE 201, Sagadahoc, ME
Built 1983 Load: 26.2 t ADT: 335
FORESIDE RD
PoorOver: MUDDY RIVER
0.2 MI S JCT RTE 24, Sagadahoc, ME
Built 1952 Load: 27.5 t ADT: 378
RIVER RD
PoorOver: ABAGADASSET RIVER
4 MI. NE 138, Sagadahoc, ME
Built 1936 Load: 27.9 t ADT: 819
MAIN ST
PoorOver: M C RR & A MARSH
1.1 MI NE OF BATH T L, Sagadahoc, ME
Built 1933 Load: 38.6 t ADT: 18,940
AUGUSTA RD
PoorOver: CATHANCE RIVER
1.4 MI NLY JCT RTE 196, Sagadahoc, ME
Built 1973 Load: 46.7 t ADT: 4,672
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.