US Bridges

T-840 Griffith RD over Little Mahoning Creek

Fair

Indiana County, Pennsylvania · Btw T402 & SR4018 · Structure no. 000000000019509

Built
1960
65 years old
Condition
Fair
inspected November 2023
Type
Girder and Floorbeam System
Steel
Length
124 ft
1 main span
Daily traffic
70
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-840 Griffith RD over Little Mahoning Creek is a steel girder and floorbeam system carrying T-840 Griffith RD over Little Mahoning Creek in Indiana County, Pennsylvania. It was built in 1960, so it is 65 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 6 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 70 vehicles a day, roughly 10% of them trucks, projected to reach 100 by 2043. The structure is 124 ft (37.8 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesT-840 Griffith RD
CrossesLittle Mahoning Creek
LocationBtw T402 & SR4018
RouteCity Street 0
Coordinates40.8454, -79.14236
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length124 ft (37.8 m)
Longest span121 ft (36.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2023)
Projected traffic100 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$284,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-840 Griffith RD over Little Mahoning Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is T-840 Griffith RD over Little Mahoning Creek 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 November 2023.

How much traffic does T-840 Griffith RD over Little Mahoning Creek carry?

About 70 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is T-840 Griffith RD over Little Mahoning Creek?

The structure is 124 ft (37.8 m) long with a longest span of 121 ft (36.9 m) and a deck 30 ft wide.

Who owns T-840 Griffith RD over Little Mahoning Creek?

It is owned by the Town or Township Highway Agency.