US Bridges

T-761 Keck Road over Bonnie Brook

Fair

Butler County, Pennsylvania · 0.75 MI SW of Carbon Cntr · Structure no. 000000000008286

Built
1996
29 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
100
2015 count
Owner
County
County Highway Agency

About this bridge

T-761 Keck Road over Bonnie Brook is a prestressed concrete box beam or girders - multiple carrying T-761 Keck Road over Bonnie Brook in Butler County, Pennsylvania. It was built in 1996, so it is 29 years old, younger 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 6 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 100 vehicles a day, roughly 9% of them trucks, projected to reach 140 by 2035. The structure is 47 ft (14.3 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesT-761 Keck Road
CrossesBonnie Brook
Location0.75 MI SW of Carbon Cntr
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates40.86656, -79.80359
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating66 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2015)
Projected traffic140 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-761 Keck Road over Bonnie Brook built?

It was built in 1996, making it 29 years old in 2025.

What condition is T-761 Keck Road over Bonnie Brook 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 November 2023.

How much traffic does T-761 Keck Road over Bonnie Brook carry?

About 100 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is T-761 Keck Road over Bonnie Brook?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 31 ft wide.

Who owns T-761 Keck Road over Bonnie Brook?

It is owned by the County Highway Agency.