US Bridges

Middle RD over Martin Stream

Fair

Somerset County, Maine · 1.3 MI N of JCT RTE 139 · Structure no. 3968

Built
1963
62 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
2,872
2016 count
Owner
State
State Highway Agency

About this bridge

Middle RD over Martin Stream is a steel stringer/multi-beam or girder carrying Middle RD over Martin Stream in Somerset County, Maine. It was built in 1963, so it is 62 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 2,872 vehicles a day, roughly 5% of them trucks, projected to reach 4,021 by 2036. The structure is 80 ft (24.3 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesMiddle RD
CrossesMartin Stream
Location1.3 MI N of JCT RTE 139
RouteCounty Highway 104
CountySomerset County
StateMaine
Coordinates44.65061, -69.67599
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.
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 inspectionDecember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length80 ft (24.3 m)
Longest span75 ft (22.9 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,872 (2016)
Projected traffic4,021 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Middle RD over Martin Stream built?

It was built in 1963, making it 62 years old in 2025.

What condition is Middle RD over Martin 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 December 2023.

How much traffic does Middle RD over Martin Stream carry?

About 2,872 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Middle RD over Martin Stream?

The structure is 80 ft (24.3 m) long with a longest span of 75 ft (22.9 m) and a deck 31 ft wide.

Who owns Middle RD over Martin Stream?

It is owned by the State Highway Agency.