US Bridges

Grubb St; Middleto over Swatara Creek

Fair

Dauphin County, Pennsylvania · Grubb St; Middletown Boro · Structure no. 000000000014752

Built
1992
33 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
278 ft
4 main spans
Daily traffic
900
2023 count
Owner
County
County Highway Agency

About this bridge

Grubb St; Middleto over Swatara Creek is a prestressed concrete continuous box beam or girders - multiple carrying Grubb St; Middleto over Swatara Creek in Dauphin County, Pennsylvania. It was built in 1992, so it is 33 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 900 vehicles a day, roughly 1% of them trucks, projected to reach 1,260 by 2043. The structure is 278 ft (84.7 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesGrubb St; Middleto
CrossesSwatara Creek
LocationGrubb St; Middletown Boro
RouteCity Street 0
CountyDauphin County
StatePennsylvania
Coordinates40.19191, -76.72797
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69 US tons
Inventory rating37 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length278 ft (84.7 m)
Longest span67 ft (20.4 m)
Deck width36 ft (10.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2023)
Projected traffic1,260 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Grubb St; Middleto over Swatara Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Grubb St; Middleto over Swatara 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 July 2023.

How much traffic does Grubb St; Middleto over Swatara Creek carry?

About 900 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Grubb St; Middleto over Swatara Creek?

The structure is 278 ft (84.7 m) long with a longest span of 67 ft (20.4 m) and a deck 36 ft wide.

Who owns Grubb St; Middleto over Swatara Creek?

It is owned by the County Highway Agency.