US Bridges

N Main ST over Saline CR

Fair

Madison County, Missouri · S 18 T 33 N R 7 E · Structure no. 17421

Built
1945
80 years old, rebuilt 1984
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
124 ft
3 main spans
Daily traffic
1,500
2024 count
Owner
County
County Highway Agency

About this bridge

N Main ST over Saline CR is a prestressed concrete tee beam carrying N Main ST over Saline CR in Madison County, Missouri. It was built in 1945 and reconstructed in 1984, so it is 80 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 1,950 by 2044. The structure is 124 ft (37.8 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesN Main ST
CrossesSaline CR
LocationS 18 T 33 N R 7 E
RouteCity Street 0
CountyMadison County
StateMissouri
Coordinates37.56199, -90.29434
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length124 ft (37.8 m)
Longest span39 ft (11.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2024)
Projected traffic1,950 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCity or Municipal 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 N Main ST over Saline CR built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1984.

What condition is N Main ST over Saline 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 December 2023.

How much traffic does N Main ST over Saline CR carry?

About 1,500 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is N Main ST over Saline CR?

The structure is 124 ft (37.8 m) long with a longest span of 39 ft (11.9 m) and a deck 33 ft wide.

Who owns N Main ST over Saline CR?

It is owned by the County Highway Agency and maintained by the City or Municipal Highway Agency.