US Bridges

Unity RD over 15 Mile Stream

Fair

Kennebec County, Maine · 1.1 MI W JCT 137 · Structure no. 2832

Built
1928
97 years old, rebuilt 1950
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete
Length
40 ft
1 main span
Daily traffic
3,112
2016 count
Owner
State
State Highway Agency

About this bridge

Unity RD over 15 Mile Stream is a concrete tee beam carrying Unity RD over 15 Mile Stream in Kennebec County, Maine. It was built in 1928 and reconstructed in 1950, so it is 97 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 3,112 vehicles a day, roughly 5% of them trucks, projected to reach 4,357 by 2036. The structure is 40 ft (12.1 m) long and 36 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesUnity RD
Crosses15 Mile Stream
Location1.1 MI W JCT 137
RouteState Highway 202
CountyKennebec County
StateMaine
Coordinates44.53749, -69.42215
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length40 ft (12.1 m)
Longest span35 ft (10.8 m)
Deck width36 ft (11 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,112 (2016)
Projected traffic4,357 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 Unity RD over 15 Mile Stream built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1950.

What condition is Unity RD over 15 Mile 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 October 2024.

How much traffic does Unity RD over 15 Mile Stream carry?

About 3,112 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Unity RD over 15 Mile Stream?

The structure is 40 ft (12.1 m) long with a longest span of 35 ft (10.8 m) and a deck 36 ft wide.

Who owns Unity RD over 15 Mile Stream?

It is owned by the State Highway Agency.