US Bridges

Hunt Seat Drive over Willow Run

Fair

Montgomery County, Pennsylvania · 400 N Gwynedd Av 3257-A2 · Structure no. 000000000057512

Built
1988
37 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
39 ft
2 main spans
Daily traffic
250
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Hunt Seat Drive over Willow Run is a concrete culvert carrying Hunt Seat Drive over Willow Run in Montgomery County, Pennsylvania. It was built in 1988, so it is 37 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 250 vehicles a day, roughly 1% of them trucks, projected to reach 300 by 2040. The structure is 39 ft (11.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHunt Seat Drive
CrossesWillow Run
Location400 N Gwynedd Av 3257-A2
RouteCity Street 0
CountyMontgomery County
StatePennsylvania
Coordinates40.17567, -75.24697
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span18 ft (5.5 m)
Deck width40 ft (12.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic300 by 2040
Trucks1%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hunt Seat Drive over Willow Run built?

It was built in 1988, making it 37 years old in 2025.

What condition is Hunt Seat Drive over Willow 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 March 2024.

How much traffic does Hunt Seat Drive over Willow Run carry?

About 250 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Hunt Seat Drive over Willow Run?

The structure is 39 ft (11.9 m) long with a longest span of 18 ft (5.5 m) and a deck 40 ft wide.

Who owns Hunt Seat Drive over Willow Run?

It is owned by the Town or Township Highway Agency.