US Bridges

Rt Nn S over Dry CR

Fair

Madison County, Missouri · S 4 T 33 N R 8 E · Structure no. 1687

Built
1967
58 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete Continuous
Length
34 ft
2 main spans
Daily traffic
282
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Nn S over Dry CR is a concrete continuous culvert carrying Rt Nn S over Dry CR in Madison County, Missouri. It was built in 1967, so it is 58 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 282 vehicles a day, roughly 10% of them trucks, projected to reach 395 by 2044. The structure is 34 ft (10.4 m) long and 39 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRt Nn S
CrossesDry CR
LocationS 4 T 33 N R 8 E
RouteState Highway 0NN
Coordinates37.58589, -90.16395
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length34 ft (10.4 m)
Longest span15 ft (4.6 m)
Deck width39 ft (11.9 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic282 (2024)
Projected traffic395 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Nn S over Dry CR built?

It was built in 1967, making it 58 years old in 2025.

What condition is Rt Nn S over Dry 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 2024.

How much traffic does Rt Nn S over Dry CR carry?

About 282 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Rt Nn S over Dry CR?

The structure is 34 ft (10.4 m) long with a longest span of 15 ft (4.6 m) and a deck 39 ft wide.

Who owns Rt Nn S over Dry CR?

It is owned by the State Highway Agency.