US Bridges

Baldwin ST over Mc Laughlin Run

Fair

Allegheny County, Pennsylvania · ML06 Mclaughlin Run # 6 · Structure no. 000000000002560

Built
1935
90 years old
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
35 ft
1 main span
Daily traffic
3,155
2006 count
Owner
County
County Highway Agency

About this bridge

Baldwin ST over Mc Laughlin Run is a concrete arch - deck carrying Baldwin ST over Mc Laughlin Run in Allegheny County, Pennsylvania. It was built in 1935, so it is 90 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 3,155 vehicles a day, roughly 5% of them trucks, projected to reach 3,500 by 2023. The structure is 35 ft (10.7 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBaldwin ST
CrossesMc Laughlin Run
LocationML06 Mclaughlin Run # 6
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.35763, -80.10568
Functional classUrban 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
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span35 ft (10.7 m)
Deck width38 ft (11.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,155 (2006)
Projected traffic3,500 by 2023
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$125,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Baldwin ST over Mc Laughlin Run built?

It was built in 1935, making it 90 years old in 2025.

What condition is Baldwin ST over Mc Laughlin 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 May 2024.

How much traffic does Baldwin ST over Mc Laughlin Run carry?

About 3,155 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Baldwin ST over Mc Laughlin Run?

The structure is 35 ft (10.7 m) long with a longest span of 35 ft (10.7 m) and a deck 38 ft wide.

Who owns Baldwin ST over Mc Laughlin Run?

It is owned by the County Highway Agency.