US Bridges

Mill Road over Valley Creek

Fair

Chester County, Pennsylvania · Tredyffrin Twp 3365-E9 · Structure no. 000000000010721

Built
1912
113 years old
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
30 ft
1 main span
Daily traffic
2,897
2018 count
Owner
County
County Highway Agency

About this bridge

Mill Road over Valley Creek is a masonry arch - deck carrying Mill Road over Valley Creek in Chester County, Pennsylvania. It was built in 1912, so it is 113 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 2,897 vehicles a day, roughly 4% of them trucks, projected to reach 3,287 by 2023. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMill Road
CrossesValley Creek
LocationTredyffrin Twp 3365-E9
RouteCity Street 0
CountyChester County
StatePennsylvania
Coordinates40.06707, -75.47204
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
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,897 (2018)
Projected traffic3,287 by 2023
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$109,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Valley Creek built?

It was built in 1912, making it 113 years old in 2025.

What condition is Mill Road over Valley 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 April 2024.

How much traffic does Mill Road over Valley Creek carry?

About 2,897 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Mill Road over Valley Creek?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 22 ft wide.

Who owns Mill Road over Valley Creek?

It is owned by the County Highway Agency.