US Bridges

County RD 66 over Lit Niangua Rvr

Good

Hickory County, Missouri · S 25 T 38 N R 20 W · Structure no. 34590

Built
2014
11 years old
Condition
Good
inspected February 2025
Type
Channel Beam
Concrete
Length
110 ft
3 main spans
Daily traffic
15
2025 count
Owner
County
County Highway Agency

About this bridge

County RD 66 over Lit Niangua Rvr is a concrete channel beam carrying County RD 66 over Lit Niangua Rvr in Hickory County, Missouri. It was built in 2014, so it is 11 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 18 by 2045. The structure is 110 ft (33.5 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 66
CrossesLit Niangua Rvr
LocationS 25 T 38 N R 20 W
RouteCounty Highway 67
CountyHickory County
StateMissouri
Coordinates38.01222, -93.08333
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2025
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span45 ft (13.7 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2025)
Projected traffic18 by 2045
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 66 over Lit Niangua Rvr built?

It was built in 2014, making it 11 years old in 2025.

What condition is County RD 66 over Lit Niangua Rvr 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 February 2025.

How much traffic does County RD 66 over Lit Niangua Rvr carry?

About 15 vehicles per day (2025 count), of which roughly 10% are trucks.

How long is County RD 66 over Lit Niangua Rvr?

The structure is 110 ft (33.5 m) long with a longest span of 45 ft (13.7 m) and a deck 25 ft wide.

Who owns County RD 66 over Lit Niangua Rvr?

It is owned by the County Highway Agency.