US Bridges

Rt Aa S over Melton CR

Fair

Vernon County, Missouri · S 21 T 36 N R 29 W · Structure no. 7993

Built
1955
70 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
599
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Aa S over Melton CR is a concrete continuous culvert carrying Rt Aa S over Melton CR in Vernon County, Missouri. It was built in 1955, so it is 70 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 5 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 599 vehicles a day, roughly 31% of them trucks, projected to reach 839 by 2044. The structure is 34 ft (10.5 m) long and 29 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesRt Aa S
CrossesMelton CR
LocationS 21 T 36 N R 29 W
RouteState Highway 0AA
CountyVernon County
StateMissouri
Coordinates37.88147, -94.12222
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length34 ft (10.5 m)
Longest span11 ft (3.4 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic599 (2024)
Projected traffic839 by 2044
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Aa S over Melton CR built?

It was built in 1955, making it 70 years old in 2025.

What condition is Rt Aa S over Melton 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 March 2024.

How much traffic does Rt Aa S over Melton CR carry?

About 599 vehicles per day (2024 count), of which roughly 31% are trucks.

How long is Rt Aa S over Melton CR?

The structure is 34 ft (10.5 m) long with a longest span of 11 ft (3.4 m) and a deck 29 ft wide.

Who owns Rt Aa S over Melton CR?

It is owned by the State Highway Agency.