US Bridges

SR 2005 Roundtop R over Iron Mine Run

Poor

Dauphin County, Pennsylvania · 1.5 Mi. E. Middletown · Structure no. 000000000014463

Built
1934
91 years old, rebuilt 1948
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
696
2024 count
Owner
State
State Highway Agency

About this bridge

SR 2005 Roundtop R over Iron Mine Run is a steel stringer/multi-beam or girder carrying SR 2005 Roundtop R over Iron Mine Run in Dauphin County, Pennsylvania. It was built in 1934 and reconstructed in 1948, so it is 91 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 696 vehicles a day, roughly 6% of them trucks, projected to reach 955 by 2032. The structure is 31 ft (9.4 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSR 2005 Roundtop R
CrossesIron Mine Run
Location1.5 Mi. E. Middletown
RouteState Highway 0
Coordinates40.20097, -76.69762
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic696 (2024)
Projected traffic955 by 2032
Trucks6%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$441,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 2005 Roundtop R over Iron Mine Run built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1948.

What condition is SR 2005 Roundtop R over Iron Mine Run in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does SR 2005 Roundtop R over Iron Mine Run carry?

About 696 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 2005 Roundtop R over Iron Mine Run?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 25 ft wide.

Who owns SR 2005 Roundtop R over Iron Mine Run?

It is owned by the State Highway Agency.