US Bridges

T-465 over Treaster Run

Poor

Mifflin County, Pennsylvania · 800 Ft South of LR499 · Structure no. 000000000026607

Built
1915
110 years old
Condition
Poor
inspected April 2023
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
200
2019 count
Owner
County
County Highway Agency

About this bridge

T-465 over Treaster Run is a concrete arch - deck carrying T-465 over Treaster Run in Mifflin County, Pennsylvania. It was built in 1915, so it is 110 years old, older 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 4 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.

It carries about 200 vehicles a day, projected to reach 200 by 2039. The structure is 40 ft (12.2 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesT-465
CrossesTreaster Run
Location800 Ft South of LR499
RouteCity Street 0
CountyMifflin County
StatePennsylvania
Coordinates40.72028, -77.53005
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2019)
Projected traffic200 by 2039
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$13,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-465 over Treaster Run built?

It was built in 1915, making it 110 years old in 2025.

What condition is T-465 over Treaster 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 April 2023.

How much traffic does T-465 over Treaster Run carry?

About 200 vehicles per day (2019 count).

How long is T-465 over Treaster Run?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns T-465 over Treaster Run?

It is owned by the County Highway Agency.