US Bridges

Danner Road T-544 over Armstrong Creek

Fair

Dauphin County, Pennsylvania · 1.2NE Enders/Armstrong CR · Structure no. 000000000014667

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

Danner Road T-544 over Armstrong Creek is a prestressed concrete box beam or girders - multiple carrying Danner Road T-544 over Armstrong Creek in Dauphin County, Pennsylvania. It was built in 1974, so it is 51 years old, younger 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 75 vehicles a day, projected to reach 105 by 2043. The structure is 36 ft (11 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDanner Road T-544
CrossesArmstrong Creek
Location1.2NE Enders/Armstrong CR
RouteCity Street 0
CountyDauphin County
StatePennsylvania
Coordinates40.50724, -76.83089
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating68 US tons
Inventory rating32 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic105 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Danner Road T-544 over Armstrong Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Danner Road T-544 over Armstrong 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 August 2023.

How much traffic does Danner Road T-544 over Armstrong Creek carry?

About 75 vehicles per day (2023 count).

How long is Danner Road T-544 over Armstrong Creek?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 23 ft wide.

Who owns Danner Road T-544 over Armstrong Creek?

It is owned by the County Highway Agency.