US Bridges

T-628 Q.Dam Road over Quemahoning Reservoir

Fair

Somerset County, Pennsylvania · 2.5 Mi.E.Of Boswell · Structure no. 000000000031859

Built
1939
86 years old, rebuilt 2014
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
172 ft
2 main spans
Daily traffic
350
2022 count
Owner
County
County Highway Agency

About this bridge

T-628 Q.Dam Road over Quemahoning Reservoir is a steel continuous stringer/multi-beam or girder carrying T-628 Q.Dam Road over Quemahoning Reservoir in Somerset County, Pennsylvania. It was built in 1939 and reconstructed in 2014, so it is 86 years old, older than the Pennsylvania average of 54.8 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 350 vehicles a day, roughly 1% of them trucks, projected to reach 438 by 2042. The structure is 172 ft (52.4 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesT-628 Q.Dam Road
CrossesQuemahoning Reservoir
Location2.5 Mi.E.Of Boswell
RouteCity Street 0
CountySomerset County
StatePennsylvania
Coordinates40.15719, -78.98279
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.8 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length172 ft (52.4 m)
Longest span85 ft (25.9 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2022)
Projected traffic438 by 2042
Trucks1%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was T-628 Q.Dam Road over Quemahoning Reservoir built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 2014.

What condition is T-628 Q.Dam Road over Quemahoning Reservoir 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 May 2024.

How much traffic does T-628 Q.Dam Road over Quemahoning Reservoir carry?

About 350 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is T-628 Q.Dam Road over Quemahoning Reservoir?

The structure is 172 ft (52.4 m) long with a longest span of 85 ft (25.9 m) and a deck 25 ft wide.

Who owns T-628 Q.Dam Road over Quemahoning Reservoir?

It is owned by the County Highway Agency.