US Bridges

Mill ST over Panther Run

Fair

Cumberland County, Maine · 0.8 MI Wly of JCT RTE 85 · Structure no. 5271

Built
1949
76 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
1,187
2016 count
Owner
State
State Highway Agency

About this bridge

Mill ST over Panther Run is a concrete slab carrying Mill ST over Panther Run in Cumberland County, Maine. It was built in 1949, so it is 76 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 5 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 1,187 vehicles a day, roughly 5% of them trucks, projected to reach 1,781 by 2036. The structure is 25 ft (7.6 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMill ST
CrossesPanther Run
Location0.8 MI Wly of JCT RTE 85
RouteCity Street 0
CountyCumberland County
StateMaine
Coordinates43.90126, -70.46528
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,187 (2016)
Projected traffic1,781 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 ST over Panther Run built?

It was built in 1949, making it 76 years old in 2025.

What condition is Mill ST over Panther Run 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 July 2023.

How much traffic does Mill ST over Panther Run carry?

About 1,187 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mill ST over Panther Run?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns Mill ST over Panther Run?

It is owned by the State Highway Agency.