US Bridges

Mabry RD over Elkhorn CR

Fair

Montgomery County, Missouri · S 22 T 50 N R 4 W · Structure no. 14921

Built
1997
28 years old
Condition
Fair
inspected January 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
118 ft
3 main spans
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

Mabry RD over Elkhorn CR is a prestressed concrete continuous tee beam carrying Mabry RD over Elkhorn CR in Montgomery County, Missouri. It was built in 1997, so it is 28 years old, younger 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2043. The structure is 118 ft (36 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMabry RD
CrossesElkhorn CR
LocationS 22 T 50 N R 4 W
RouteCounty Highway 79
CountyMontgomery County
StateMissouri
Coordinates39.08189, -91.34172
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span50 ft (15.2 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic44 by 2043
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 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 Mabry RD over Elkhorn CR built?

It was built in 1997, making it 28 years old in 2025.

What condition is Mabry RD over Elkhorn 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 January 2023.

How much traffic does Mabry RD over Elkhorn CR carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Mabry RD over Elkhorn CR?

The structure is 118 ft (36 m) long with a longest span of 50 ft (15.2 m) and a deck 25 ft wide.

Who owns Mabry RD over Elkhorn CR?

It is owned by the County Highway Agency.