US Bridges

Patterson Mill Bri over Cross Creek Trib

PoorPosted for load

Washington County, Pennsylvania · 250 East of SR 4029 · Structure no. 000000000035266

Built
1913
112 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

Patterson Mill Bri over Cross Creek Trib is a steel stringer/multi-beam or girder carrying Patterson Mill Bri over Cross Creek Trib in Washington County, Pennsylvania. It was built in 1913, so it is 112 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, projected to reach 30 by 2044. The structure is 36 ft (11 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesPatterson Mill Bri
CrossesCross Creek Trib
Location250 East of SR 4029
RouteCity Street 0T731
CountyWashington County
StatePennsylvania
Coordinates40.28775, -80.44976
Functional classRural Minor Arterial

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating6 US tons
Inventory rating3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 10
Structure length36 ft (11 m)
Longest span30 ft (9.1 m)
Deck width20 ft (6.1 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic30 by 2044
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Patterson Mill Bri over Cross Creek Trib built?

It was built in 1913, making it 112 years old in 2025.

What condition is Patterson Mill Bri over Cross Creek Trib 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 July 2023.

How much traffic does Patterson Mill Bri over Cross Creek Trib carry?

About 30 vehicles per day (2024 count).

How long is Patterson Mill Bri over Cross Creek Trib?

The structure is 36 ft (11 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns Patterson Mill Bri over Cross Creek Trib?

It is owned by the County Highway Agency.