US Bridges

SR 4018 Mcclays Ml over Trib Conodoguinet CR

Fair

Franklin County, Pennsylvania · 1.5 MI SE of Mowersville · Structure no. 000000000017609

Built
1827
198 years old, rebuilt 2022
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
45 ft
2 main spans
Daily traffic
702
2023 count
Owner
State
State Highway Agency

About this bridge

SR 4018 Mcclays Ml over Trib Conodoguinet CR is a masonry arch - deck carrying SR 4018 Mcclays Ml over Trib Conodoguinet CR in Franklin County, Pennsylvania. It was built in 1827 and reconstructed in 2022, so it is 198 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 702 vehicles a day, roughly 4% of them trucks, projected to reach 689 by 2032. The structure is 45 ft (13.7 m) long and 20 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR 4018 Mcclays Ml
CrossesTrib Conodoguinet CR
Location1.5 MI SE of Mowersville
RouteState Highway 0
CountyFranklin County
StatePennsylvania
Coordinates40.0969, -77.57082
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating29 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span20 ft (6.1 m)
Deck width20 ft (6.2 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic702 (2023)
Projected traffic689 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$473,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4018 Mcclays Ml over Trib Conodoguinet CR built?

It was built in 1827, making it 198 years old in 2025. It was reconstructed in 2022.

What condition is SR 4018 Mcclays Ml over Trib Conodoguinet CR 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 2024.

How much traffic does SR 4018 Mcclays Ml over Trib Conodoguinet CR carry?

About 702 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SR 4018 Mcclays Ml over Trib Conodoguinet CR?

The structure is 45 ft (13.7 m) long with a longest span of 20 ft (6.1 m) and a deck 20 ft wide.

Who owns SR 4018 Mcclays Ml over Trib Conodoguinet CR?

It is owned by the State Highway Agency.