US Bridges

Reservoir Road over Rock Run

Fair

Chester County, Pennsylvania · 3/4 MI S Pa 340 3469-B10 · Structure no. 000000000010840

Built
1920
105 years old, rebuilt 1930
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
29 ft
1 main span
Daily traffic
225
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Reservoir Road over Rock Run is a concrete arch - deck carrying Reservoir Road over Rock Run in Chester County, Pennsylvania. It was built in 1920 and reconstructed in 1930, so it is 105 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 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 225 vehicles a day, roughly 2% of them trucks, projected to reach 300 by 2036. The structure is 29 ft (8.8 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesReservoir Road
CrossesRock Run
Location3/4 MI S Pa 340 3469-B10
RouteCity Street 0
CountyChester County
StatePennsylvania
Coordinates40.00192, -75.86366
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.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2016)
Projected traffic300 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Reservoir Road over Rock Run built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1930.

What condition is Reservoir Road over Rock Run 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 Reservoir Road over Rock Run carry?

About 225 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Reservoir Road over Rock Run?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 23 ft wide.

Who owns Reservoir Road over Rock Run?

It is owned by the Town or Township Highway Agency.