US Bridges

T-420 over Kish. Creek

PoorClosed to traffic

Mifflin County, Pennsylvania · 500FT E Inter LR29&T-420 · Structure no. 000000000026631

Built
1909
116 years old
Condition
Poor
inspected June 2023
Type
Arch - Deck
Concrete
Length
197 ft
3 main spans
Daily traffic
—
2021 count
Owner
County
County Highway Agency

About this bridge

T-420 over Kish. Creek is a concrete arch - deck carrying T-420 over Kish. Creek in Mifflin County, Pennsylvania. It was built in 1909, so it is 116 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 0 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. Its operating status is: closed to all traffic.

No traffic count is recorded. The structure is 197 ft (60 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesT-420
CrossesKish. Creek
Location500FT E Inter LR29&T-420
RouteCounty Highway 7205
Coordinates40.64869, -77.57942
Functional classRural Local

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
Superstructure0 FailedOut of service and beyond corrective action.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckOther
Main spans3
Design loadHS 20
Structure length197 ft (60 m)
Longest span59 ft (18 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollToll bridge
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-420 over Kish. Creek built?

It was built in 1909, making it 116 years old in 2025.

What condition is T-420 over Kish. Creek 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 June 2023.

How much traffic does T-420 over Kish. Creek carry?

No traffic count is recorded for this structure.

How long is T-420 over Kish. Creek?

The structure is 197 ft (60 m) long with a longest span of 59 ft (18 m) and a deck 16 ft wide.

Who owns T-420 over Kish. Creek?

It is owned by the County Highway Agency.