US Bridges

Castle Hill RD over Aroostook River

Fair

Aroostook County, Maine · 0.2 MI S of JCT RTE 164 · Structure no. 2025

Built
1971
54 years old, rebuilt 1991
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
455 ft
3 main spans
Daily traffic
1,320
2016 count
Owner
State
State Highway Agency

About this bridge

Castle Hill RD over Aroostook River is a steel continuous stringer/multi-beam or girder carrying Castle Hill RD over Aroostook River in Aroostook County, Maine. It was built in 1971 and reconstructed in 1991, so it is 54 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,320 vehicles a day, roughly 5% of them trucks, projected to reach 1,980 by 2036. The structure is 455 ft (138.7 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesCastle Hill RD
CrossesAroostook River
Location0.2 MI S of JCT RTE 164
RouteState Highway 0
CountyAroostook County
StateMaine
Coordinates46.77581, -68.15409
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length455 ft (138.7 m)
Longest span170 ft (51.8 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,320 (2016)
Projected traffic1,980 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Castle Hill RD over Aroostook River built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1991.

What condition is Castle Hill RD over Aroostook River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does Castle Hill RD over Aroostook River carry?

About 1,320 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Castle Hill RD over Aroostook River?

The structure is 455 ft (138.7 m) long with a longest span of 170 ft (51.8 m) and a deck 34 ft wide.

Who owns Castle Hill RD over Aroostook River?

It is owned by the State Highway Agency.