US Bridges

Pierson Road over Morrison Run

Fair

Mercer County, Pennsylvania · 100FT S of Petersburg RD · Structure no. 000000000026238

Built
1962
63 years old, rebuilt 2010
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
22
2023 count
Owner
County
County Highway Agency

About this bridge

Pierson Road over Morrison Run is a prestressed concrete box beam or girders - multiple carrying Pierson Road over Morrison Run in Mercer County, Pennsylvania. It was built in 1962 and reconstructed in 2010, so it is 63 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 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 22 vehicles a day, roughly 4% of them trucks, projected to reach 30 by 2039. The structure is 25 ft (7.6 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesPierson Road
CrossesMorrison Run
Location100FT S of Petersburg RD
RouteCity Street 7222
CountyMercer County
StatePennsylvania
Coordinates41.43945, -80.25262
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22 (2023)
Projected traffic30 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pierson Road over Morrison Run built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2010.

What condition is Pierson Road over Morrison 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 Pierson Road over Morrison Run carry?

About 22 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Pierson Road over Morrison Run?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.

Who owns Pierson Road over Morrison Run?

It is owned by the County Highway Agency.