US Bridges

Nunn RD over Heeb CR

Fair

Scott County, Missouri · S 18 T 29 N R 13 E · Structure no. 14831

Built
1968
57 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
100
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nunn RD over Heeb CR is a concrete tee beam carrying Nunn RD over Heeb CR in Scott County, Missouri. It was built in 1968, so it is 57 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2043. The structure is 27 ft (8.2 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNunn RD
CrossesHeeb CR
LocationS 18 T 29 N R 13 E
RouteCity Street 0
CountyScott County
StateMissouri
Coordinates37.17394, -89.65168
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic140 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Nunn RD over Heeb CR built?

It was built in 1968, making it 57 years old in 2025.

What condition is Nunn RD over Heeb 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 2025.

How much traffic does Nunn RD over Heeb CR carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Nunn RD over Heeb CR?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 14 ft wide.

Who owns Nunn RD over Heeb CR?

It is owned by the City or Municipal Highway Agency.