US Bridges

Elm ST over Flat Br

Fair

Boone County, Missouri · S 13 T 48 N R 13 W · Structure no. 15441

Built
1990
35 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
2,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Elm ST over Flat Br is a concrete culvert carrying Elm ST over Flat Br in Boone County, Missouri. It was built in 1990, so it is 35 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 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 2,000 vehicles a day, roughly 5% of them trucks, projected to reach 3,500 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesElm ST
CrossesFlat Br
LocationS 13 T 48 N R 13 W
RouteCity Street 0
CountyBoone County
StateMissouri
Coordinates38.94852, -92.32968
Functional classUrban 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
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic3,500 by 2043
Trucks5%
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

OwnerCity or Municipal 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 Elm ST over Flat Br built?

It was built in 1990, making it 35 years old in 2025.

What condition is Elm ST over Flat Br 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 2024.

How much traffic does Elm ST over Flat Br carry?

About 2,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Elm ST over Flat Br?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns Elm ST over Flat Br?

It is owned by the City or Municipal Highway Agency.