US Bridges

Mcconnell Road over Slippery Rock Creek

Poor

Lawrence County, Pennsylvania · Mcconnels Mill SP · Structure no. 000000000022420

Built
1954
71 years old
Condition
Poor
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
144 ft
2 main spans
Daily traffic
62
2014 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Mcconnell Road over Slippery Rock Creek is a steel stringer/multi-beam or girder carrying Mcconnell Road over Slippery Rock Creek in Lawrence County, Pennsylvania. It was built in 1954, so it is 71 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 62 vehicles a day, roughly 9% of them trucks, projected to reach 42 by 2032. The structure is 144 ft (43.9 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesMcconnell Road
CrossesSlippery Rock Creek
LocationMcconnels Mill SP
RouteState Highway 0
Coordinates40.9406, -80.1766
Functional classRural Minor Collector

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.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating93 US tons
Inventory rating56 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2014)
Projected traffic42 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$458,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcconnell Road over Slippery Rock Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Mcconnell Road over Slippery Rock 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 July 2022.

How much traffic does Mcconnell Road over Slippery Rock Creek carry?

About 62 vehicles per day (2014 count), of which roughly 9% are trucks.

How long is Mcconnell Road over Slippery Rock Creek?

The structure is 144 ft (43.9 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns Mcconnell Road over Slippery Rock Creek?

It is owned by the State Park, Forest, or Reservation Agency.