US Bridges

Eleventh Avenue Et over Blockhouse Run

Fair

Beaver County, Pennsylvania · 423006 100 Yd / 13 ST Int · Structure no. 000000000003906

Built
1905
120 years old, rebuilt 1993
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel
Length
51 ft
1 main span
Daily traffic
50
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Eleventh Avenue Et over Blockhouse Run is a steel girder and floorbeam system carrying Eleventh Avenue Et over Blockhouse Run in Beaver County, Pennsylvania. It was built in 1905 and reconstructed in 1993, so it is 120 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 5 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 73 by 2041. The structure is 51 ft (15.5 m) long and 13 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesEleventh Avenue Et
CrossesBlockhouse Run
Location423006 100 Yd / 13 ST Int
RouteCity Street 0
CountyBeaver County
StatePennsylvania
Coordinates40.73226, -80.30365
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating50 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span43 ft (13.1 m)
Deck width13 ft (4 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic73 by 2041
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$44,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Eleventh Avenue Et over Blockhouse Run built?

It was built in 1905, making it 120 years old in 2025. It was reconstructed in 1993.

What condition is Eleventh Avenue Et over Blockhouse Run 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 April 2023.

How much traffic does Eleventh Avenue Et over Blockhouse Run carry?

About 50 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Eleventh Avenue Et over Blockhouse Run?

The structure is 51 ft (15.5 m) long with a longest span of 43 ft (13.1 m) and a deck 13 ft wide.

Who owns Eleventh Avenue Et over Blockhouse Run?

It is owned by the City or Municipal Highway Agency.