US Bridges

T405 Hoods Mill RD over Trib Fourmile Run

PoorClosed to traffic

Westmoreland County, Pennsylvania · Btw SR130 & T499 · Structure no. 000000000036882

Built
1975
50 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
100
2015 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T405 Hoods Mill RD over Trib Fourmile Run is a steel stringer/multi-beam or girder carrying T405 Hoods Mill RD over Trib Fourmile Run in Westmoreland County, Pennsylvania. It was built in 1975, so it is 50 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 125 by 2035. The structure is 26 ft (7.9 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesT405 Hoods Mill RD
CrossesTrib Fourmile Run
LocationBtw SR130 & T499
RouteCity Street 0T405
Coordinates40.17981, -79.36729
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating17 US tons
Inventory rating10 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.1 m)
Roadway width10 ft (3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2015)
Projected traffic125 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T405 Hoods Mill RD over Trib Fourmile Run built?

It was built in 1975, making it 50 years old in 2025.

What condition is T405 Hoods Mill RD over Trib Fourmile Run in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does T405 Hoods Mill RD over Trib Fourmile Run carry?

About 100 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is T405 Hoods Mill RD over Trib Fourmile Run?

The structure is 26 ft (7.9 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns T405 Hoods Mill RD over Trib Fourmile Run?

It is owned by the Town or Township Highway Agency.