US Bridges

County Road 29 over Unknown Stream

Poor

Lawrence County, Ohio · .60 MI E of State Rt 93 · Structure no. 4446135

Built
1900
125 years old
Condition
Poor
inspected April 2024
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
374
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 29 over Unknown Stream is a steel culvert carrying County Road 29 over Unknown Stream in Lawrence County, Ohio. It was built in 1900, so it is 125 years old, older than the Ohio average of 47.3 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.

It carries about 374 vehicles a day, roughly 7% of them trucks, projected to reach 519 by 2035. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road 29
CrossesUnknown Stream
Location.60 MI E of State Rt 93
RouteCounty Highway C0029
CountyLawrence County
StateOhio
Coordinates38.60606, -82.63664
Functional classRural Major Collector

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic374 (2015)
Projected traffic519 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 County Road 29 over Unknown Stream built?

It was built in 1900, making it 125 years old in 2025.

What condition is County Road 29 over Unknown Stream 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 April 2024.

How much traffic does County Road 29 over Unknown Stream carry?

About 374 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is County Road 29 over Unknown Stream?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns County Road 29 over Unknown Stream?

It is owned by the County Highway Agency.