US Bridges

170th ST over S Frk Clear CR

Good

Nodaway County, Missouri · S 33 T 66 N R 36 W · Structure no. 12493

Built
1994
31 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
137 ft
3 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

170th ST over S Frk Clear CR is a prestressed concrete continuous tee beam carrying 170th ST over S Frk Clear CR in Nodaway County, Missouri. It was built in 1994, so it is 31 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2044. The structure is 137 ft (41.8 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries170th ST
CrossesS Frk Clear CR
LocationS 33 T 66 N R 36 W
RouteCounty Highway 116
Coordinates40.47687, -94.97397
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic40 by 2044
Trucks10%
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 170th ST over S Frk Clear CR built?

It was built in 1994, making it 31 years old in 2025.

What condition is 170th ST over S Frk Clear CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does 170th ST over S Frk Clear CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 170th ST over S Frk Clear CR?

The structure is 137 ft (41.8 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns 170th ST over S Frk Clear CR?

It is owned by the County Highway Agency.