US Bridges

Ridge RD over Houston Brook

Fair

Somerset County, Maine · 2.7 MI W Concord Tl · Structure no. 3085

Built
1967
58 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
379
2016 count
Owner
State
State Highway Agency

About this bridge

Ridge RD over Houston Brook is a steel stringer/multi-beam or girder carrying Ridge RD over Houston Brook in Somerset County, Maine. It was built in 1967, so it is 58 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 379 vehicles a day, roughly 5% of them trucks, projected to reach 606 by 2036. The structure is 45 ft (13.8 m) long and 31 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesRidge RD
CrossesHouston Brook
Location2.7 MI W Concord Tl
RouteCity Street 0
CountySomerset County
StateMaine
Coordinates45.0656, -69.95022
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length45 ft (13.8 m)
Longest span41 ft (12.5 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic379 (2016)
Projected traffic606 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ridge RD over Houston Brook built?

It was built in 1967, making it 58 years old in 2025.

What condition is Ridge RD over Houston Brook 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 2024.

How much traffic does Ridge RD over Houston Brook carry?

About 379 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Ridge RD over Houston Brook?

The structure is 45 ft (13.8 m) long with a longest span of 41 ft (12.5 m) and a deck 31 ft wide.

Who owns Ridge RD over Houston Brook?

It is owned by the State Highway Agency.