Knox County, ME

18 public highway bridges

Knox County Bridge Snapshot

Knox County, Maine contains 18 public highway bridges in the FHWA National Bridge Inventory. Roughly 38.9% are rated “Good,” 55.6% “Fair,” 5.6% “Poor,” and 5.6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in ME are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

18
Total Bridges
38.9%
Good
5.6%
Poor
5.6%
Structurally Deficient

Condition Distribution

Good
38.9% (7)
Fair
55.6% (10)
Poor
5.6% (1)
SD
5.6% (1)

All Bridges (18)

MOUNT BATTIE ST

Fair

Over: MEGUNTICOOK RIVER

0.3 MI SE'LY OF RTE 105, Knox, ME

Built 1987 Load: 28.5 t ADT: 442

FAIRGROUNDS LN

Fair

Over: ST GEORGE RIVER

0.1 MI W COMMON RD, Knox, ME

Built 1923 Load: 28.8 t ADT: 80

SHEPARD HILL RD

Fair

Over: MEDOMAK RIVER

UNION-WASHINGTON TL, Knox, ME

Built 1966 Load: 30.5 t ADT: 474

CAMDEN RD

Fair

Over: ST GEORGE RIVER

0.5 MI SE OF NE JCT 131, Knox, ME

Built 1953 Load: 31.1 t ADT: 720

MILLER RD

Fair

Over: PAYSON BROOK

0.4 MI SE RT 17&235, Knox, ME

Built 1999 Load: 33.0 t ADT: 267

INV 1301439 RD

Fair

Over: Fox Islands Thoroughfare

Atlantic Ocean, Knox, ME

Built 2012 Load: 36.9 t ADT: 776

S UNION RD

Fair

Over: BROWN BROOK

1 MI N TOWNLINE, Knox, ME

Built 1959 Load: 38.9 t ADT: 2,108

MAIN ST

Fair

Over: MILL STREAM

SOUTH END OF ISLAND, Knox, ME

Built 1959 Load: 47.0 t ADT: 4,273

WADSWORTH ST

Fair

Over: MAINE CENTRAL RAILROAD

0.2 MI S'LY OF US 1, Knox, ME

Built 1932 Load: 55.4 t ADT: 2,507

SKIDMORE RD

Fair

Over: MEDOMAK RIVER

1.5 MI N OF OLD UNION RD, Knox, ME

Built 2001 Load: 59.0 t ADT: 100

SANDY SHORES RD

Good

Over: BACK RIVER

1 MI W RT 1, Knox, ME

Built 2019 Load: 28.5 t ADT: 176

FITCH RD

Good

Over: JACKSON MILL STR

WASHINGTON, Knox, ME

Built 2020 Load: 32.1 t ADT: 90

W MEADOW RD

Good

Over: MEADOW BROOK

0.2 MI S LAKE STREET, Knox, ME

Built 2023 Load: 32.4 t ADT: 280

ISLAND AV

Good

Over: TIDE WATER

1 MI S RTE 73, Knox, ME

Built 1971 Load: 32.4 t ADT: 300

WOTTONS MILL RD

Good

Over: QUIGGLE BROOK

1.0 MI NE JCT RTE 131, Knox, ME

Built 2001 Load: 43.4 t ADT: 504

THOMPSON MEADOW DR

Good

Over: MEADOW BROOK

.2 MI W OLD COUNTY RD, Knox, ME

Built 2019 Load: 52.2 t ADT: 124

MILL ST

Good

Over: OYSTER RIVER

.5 MI S RT 90, Knox, ME

Built 2016 Load: 65.1 t ADT: 573

HEALD HWY

Poor

Over: ST GEORGE RIVER

0.2 MI W OF ROUTE 235, Knox, ME

Built 1960 Load: 41.5 t ADT: 6,940

Related

Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial