US Bridges

Pa 997; Black Gap over Conococheague Creek

Fair

Franklin County, Pennsylvania · Blackgap · Structure no. 000000000017460

Built
1969
56 years old, rebuilt 2023
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
94 ft
2 main spans
Daily traffic
5,198
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 997; Black Gap over Conococheague Creek is a prestressed concrete box beam or girders - multiple carrying Pa 997; Black Gap over Conococheague Creek in Franklin County, Pennsylvania. It was built in 1969 and reconstructed in 2023, so it is 56 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 5,198 vehicles a day, roughly 9% of them trucks, projected to reach 12,606 by 2042. The structure is 94 ft (28.7 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesPa 997; Black Gap
CrossesConococheague Creek
LocationBlackgap
RouteState Highway 997
Coordinates39.91003, -77.51834
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100 US tons
Inventory rating51 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length94 ft (28.7 m)
Longest span47 ft (14.3 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,198 (2024)
Projected traffic12,606 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Pa 997; Black Gap over Conococheague Creek built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2023.

What condition is Pa 997; Black Gap over Conococheague Creek 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 June 2024.

How much traffic does Pa 997; Black Gap over Conococheague Creek carry?

About 5,198 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Pa 997; Black Gap over Conococheague Creek?

The structure is 94 ft (28.7 m) long with a longest span of 47 ft (14.3 m) and a deck 48 ft wide.

Who owns Pa 997; Black Gap over Conococheague Creek?

It is owned by the State Highway Agency.