US Bridges

S. County Line Rd. over Duncan Run

Fair

Delaware County, Ohio · 0.2 Mi. S. of Robins Rd. · Structure no. 2134470

Built
1930
95 years old
Condition
Fair
inspected January 2024
Type
Culvert
Steel
Length
30 ft
3 main spans
Daily traffic
1,950
2012 count
Owner
County
County Highway Agency

About this bridge

S. County Line Rd. over Duncan Run is a steel culvert carrying S. County Line Rd. over Duncan Run in Delaware County, Ohio. It was built in 1930, so it is 95 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 1,950 vehicles a day, roughly 10% of them trucks, projected to reach 2,707 by 2032. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS. County Line Rd.
CrossesDuncan Run
Location0.2 Mi. S. of Robins Rd.
RouteCounty Highway C0051
CountyDelaware County
StateOhio
Coordinates40.14331, -82.76047
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating75 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,950 (2012)
Projected traffic2,707 by 2032
Trucks10%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S. County Line Rd. over Duncan Run built?

It was built in 1930, making it 95 years old in 2025.

What condition is S. County Line Rd. over Duncan 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 January 2024.

How much traffic does S. County Line Rd. over Duncan Run carry?

About 1,950 vehicles per day (2012 count), of which roughly 10% are trucks.

How long is S. County Line Rd. over Duncan Run?

The structure is 30 ft (9.1 m) long with a longest span of 10 ft (3 m).

Who owns S. County Line Rd. over Duncan Run?

It is owned by the County Highway Agency.