US Bridges

Boundary Line Rd. over Whitney Brook

Poor

Aroostook County, Maine · 3 MI E JCT 1 · Structure no. 5012

Built
1929
96 years old
Condition
Poor
inspected June 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
153
2016 count
Owner
State
State Highway Agency

About this bridge

Boundary Line Rd. over Whitney Brook is a concrete slab carrying Boundary Line Rd. over Whitney Brook in Aroostook County, Maine. It was built in 1929, so it is 96 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 153 vehicles a day, roughly 5% of them trucks, projected to reach 245 by 2036. The structure is 24 ft (7.3 m) long and 27 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesBoundary Line Rd.
CrossesWhitney Brook
Location3 MI E JCT 1
RouteCounty Highway 0
CountyAroostook County
StateMaine
Coordinates46.44761, -67.7923
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic153 (2016)
Projected traffic245 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Boundary Line Rd. over Whitney Brook built?

It was built in 1929, making it 96 years old in 2025.

What condition is Boundary Line Rd. over Whitney Brook in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Boundary Line Rd. over Whitney Brook carry?

About 153 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Boundary Line Rd. over Whitney Brook?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Boundary Line Rd. over Whitney Brook?

It is owned by the State Highway Agency.