US Bridges

Swamp Creek RD over Unami Creek

Fair

Montgomery County, Pennsylvania · S.Bucks CO Ln. 2917J07 · Structure no. 000000000027556

Built
1910
115 years old, rebuilt 2012
Condition
Fair
inspected May 2024
Type
Arch - Deck
Masonry
Length
98 ft
3 main spans
Daily traffic
320
2024 count
Owner
State
State Highway Agency

About this bridge

Swamp Creek RD over Unami Creek is a masonry arch - deck carrying Swamp Creek RD over Unami Creek in Montgomery County, Pennsylvania. It was built in 1910 and reconstructed in 2012, so it is 115 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 320 vehicles a day, roughly 11% of them trucks, projected to reach 463 by 2032. The structure is 98 ft (29.9 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSwamp Creek RD
CrossesUnami Creek
LocationS.Bucks CO Ln. 2917J07
RouteState Highway 0
CountyMontgomery County
StatePennsylvania
Coordinates40.36788, -75.42298
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating55 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans3
Design loadH 15
Structure length98 ft (29.9 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.7 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic320 (2024)
Projected traffic463 by 2032
Trucks11%
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 statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$920,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Swamp Creek RD over Unami Creek built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2012.

What condition is Swamp Creek RD over Unami 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 May 2024.

How much traffic does Swamp Creek RD over Unami Creek carry?

About 320 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Swamp Creek RD over Unami Creek?

The structure is 98 ft (29.9 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns Swamp Creek RD over Unami Creek?

It is owned by the State Highway Agency.