US Bridges

South Monroe St. over Connoquenessing CR

Poor

Butler County, Pennsylvania · 250 S of E Cunningham ST · Structure no. 000000000008309

Built
1970
55 years old
Condition
Poor
inspected September 2023
Type
Girder and Floorbeam System
Steel
Length
102 ft
1 main span
Daily traffic
6,900
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

South Monroe St. over Connoquenessing CR is a steel girder and floorbeam system carrying South Monroe St. over Connoquenessing CR in Butler County, Pennsylvania. It was built in 1970, so it is 55 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 6,900 vehicles a day, roughly 9% of them trucks, projected to reach 9,660 by 2032. The structure is 102 ft (31.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSouth Monroe St.
CrossesConnoquenessing CR
Location250 S of E Cunningham ST
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates40.85913, -79.88851
Functional classUrban 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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span100 ft (30.5 m)
Deck width44 ft (13.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2012)
Projected traffic9,660 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$171,000
NavigationNo navigation control on waterway

Frequently asked questions

When was South Monroe St. over Connoquenessing CR built?

It was built in 1970, making it 55 years old in 2025.

What condition is South Monroe St. over Connoquenessing CR 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 September 2023.

How much traffic does South Monroe St. over Connoquenessing CR carry?

About 6,900 vehicles per day (2012 count), of which roughly 9% are trucks.

How long is South Monroe St. over Connoquenessing CR?

The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 44 ft wide.

Who owns South Monroe St. over Connoquenessing CR?

It is owned by the City or Municipal Highway Agency.