US Bridges

Burnt Mill Road over Conodoguinet Creek

PoorPosted for load

Franklin County, Pennsylvania · 2.3 MI SE of SR 641 · Structure no. 000000000017679

Built
1885
140 years old
Condition
Poor
inspected December 2023
Type
Truss - Thru
Aluminum, Wrought Iron, or Cast Iron
Length
109 ft
1 main span
Daily traffic
250
2009 count
Owner
County
County Highway Agency

About this bridge

Burnt Mill Road over Conodoguinet Creek is a aluminum, wrought iron, or cast iron truss - thru carrying Burnt Mill Road over Conodoguinet Creek in Franklin County, Pennsylvania. It was built in 1885, so it is 140 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. Its operating status is: posted for load restriction.

It carries about 250 vehicles a day, projected to reach 270 by 2029. The structure is 109 ft (33.2 m) long and 15 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBurnt Mill Road
CrossesConodoguinet Creek
Location2.3 MI SE of SR 641
RouteCity Street 0
CountyFranklin County
StatePennsylvania
Coordinates40.10447, -77.56065
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating7.1 US tons
Inventory rating5 US tons

Structure

Structure typeTruss - Thru
MaterialAluminum, Wrought Iron, or Cast Iron
DeckWood or timber
Main spans1
Design loadH 10
Structure length109 ft (33.2 m)
Longest span105 ft (32 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deck13 ft (4.1 m)

Traffic and service

Average daily traffic250 (2009)
Projected traffic270 by 2029
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
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$153,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Burnt Mill Road over Conodoguinet Creek built?

It was built in 1885, making it 140 years old in 2025.

What condition is Burnt Mill Road over Conodoguinet 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 December 2023.

How much traffic does Burnt Mill Road over Conodoguinet Creek carry?

About 250 vehicles per day (2009 count).

How long is Burnt Mill Road over Conodoguinet Creek?

The structure is 109 ft (33.2 m) long with a longest span of 105 ft (32 m) and a deck 15 ft wide.

Who owns Burnt Mill Road over Conodoguinet Creek?

It is owned by the County Highway Agency.