US Bridges

T-489 Donahue RD over South Branch Plum Creek

Good

Indiana County, Pennsylvania · Btw T403 &SR4006 · Structure no. 000000000019503

Built
1984
41 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
73 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

T-489 Donahue RD over South Branch Plum Creek is a wood or timber stringer/multi-beam or girder carrying T-489 Donahue RD over South Branch Plum Creek in Indiana County, Pennsylvania. It was built in 1984, so it is 41 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2043. The structure is 73 ft (22.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesT-489 Donahue RD
CrossesSouth Branch Plum Creek
LocationBtw T403 &SR4006
RouteCity Street 7220
Coordinates40.73399, -79.17523
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating28 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span72 ft (21.9 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic110 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 T-489 Donahue RD over South Branch Plum Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is T-489 Donahue RD over South Branch Plum Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does T-489 Donahue RD over South Branch Plum Creek carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is T-489 Donahue RD over South Branch Plum Creek?

The structure is 73 ft (22.3 m) long with a longest span of 72 ft (21.9 m) and a deck 25 ft wide.

Who owns T-489 Donahue RD over South Branch Plum Creek?

It is owned by the County Highway Agency.