US Bridges

Mill RD over Limestone Stream

Fair

Aroostook County, Maine · 0.3 MI Wly of Route 1A · Structure no. 5292

Built
1950
75 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
314
2016 count
Owner
State
State Highway Agency

About this bridge

Mill RD over Limestone Stream is a concrete culvert carrying Mill RD over Limestone Stream in Aroostook County, Maine. It was built in 1950, so it is 75 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 314 vehicles a day, roughly 5% of them trucks, projected to reach 502 by 2036. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMill RD
CrossesLimestone Stream
Location0.3 MI Wly of Route 1A
RouteCounty Highway 0
CountyAroostook County
StateMaine
Coordinates46.92926, -67.83912
Functional classRural Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length24 ft (7.2 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic314 (2016)
Projected traffic502 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mill RD over Limestone Stream built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mill RD over Limestone Stream 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 September 2023.

How much traffic does Mill RD over Limestone Stream carry?

About 314 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mill RD over Limestone Stream?

The structure is 24 ft (7.2 m) long with a longest span of 20 ft (6.1 m).

Who owns Mill RD over Limestone Stream?

It is owned by the State Highway Agency.