US Bridges

Main Street over Mill Creek

Poor

Huntingdon County, Pennsylvania · Mill Creek Boro. · Structure no. 000000000018955

Built
1920
105 years old, rebuilt 1993
Condition
Poor
inspected June 2023
Type
Tee Beam
Concrete
Length
47 ft
1 main span
Daily traffic
284
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main Street over Mill Creek is a concrete tee beam carrying Main Street over Mill Creek in Huntingdon County, Pennsylvania. It was built in 1920 and reconstructed in 1993, so it is 105 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 284 vehicles a day, roughly 1% of them trucks, projected to reach 354 by 2043. The structure is 47 ft (14.3 m) long and 26 ft wide.

CarriesMain Street
CrossesMill Creek
LocationMill Creek Boro.
RouteCity Street 0
Coordinates40.43761, -77.93344
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length47 ft (14.3 m)
Longest span44 ft (13.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic284 (2023)
Projected traffic354 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$771,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Main Street over Mill Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1993.

What condition is Main Street over Mill Creek 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 June 2023.

How much traffic does Main Street over Mill Creek carry?

About 284 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Main Street over Mill Creek?

The structure is 47 ft (14.3 m) long with a longest span of 44 ft (13.4 m) and a deck 26 ft wide.

Who owns Main Street over Mill Creek?

It is owned by the City or Municipal Highway Agency.