US Bridges

Rt H S over Mill CR

Fair

Polk County, Missouri · S 30 T 32 N R 21 W · Structure no. 9706

Built
1941
84 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
32 ft
2 main spans
Daily traffic
1,184
2024 count
Owner
State
State Highway Agency

About this bridge

Rt H S over Mill CR is a concrete continuous culvert carrying Rt H S over Mill CR in Polk County, Missouri. It was built in 1941, so it is 84 years old, older than the Missouri average of 45.1 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 1,184 vehicles a day, roughly 11% of them trucks, projected to reach 1,894 by 2044. The structure is 32 ft (9.8 m) long and 31 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesRt H S
CrossesMill CR
LocationS 30 T 32 N R 21 W
RouteState Highway 0H
CountyPolk County
StateMissouri
Coordinates37.47234, -93.27257
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length32 ft (9.8 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,184 (2024)
Projected traffic1,894 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Rt H S over Mill CR built?

It was built in 1941, making it 84 years old in 2025.

What condition is Rt H S over Mill CR 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 November 2023.

How much traffic does Rt H S over Mill CR carry?

About 1,184 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt H S over Mill CR?

The structure is 32 ft (9.8 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

Who owns Rt H S over Mill CR?

It is owned by the State Highway Agency.