US Bridges

Swinging Br RD over Mill CR

FairClosed to traffic

Miller County, Missouri · S 36 T 39 N R 15 W · Structure no. 20530

Built
1910
115 years old, rebuilt 1978
Condition
Fair
inspected January 2025
Type
Suspension
Steel Continuous
Length
135 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Swinging Br RD over Mill CR is a steel continuous suspension carrying Swinging Br RD over Mill CR in Miller County, Missouri. It was built in 1910 and reconstructed in 1978, so it is 115 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. Its operating status is: closed to all traffic.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 51 by 2043. The structure is 135 ft (41.1 m) long and 12 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSwinging Br RD
CrossesMill CR
LocationS 36 T 39 N R 15 W
RouteCounty Highway 264
CountyMiller County
StateMissouri
Coordinates38.07836, -92.52429
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeSuspension
MaterialSteel Continuous
DeckCorrugated steel
Main spans1 (+1 approach)
Design loadOther
Structure length135 ft (41.1 m)
Longest span96 ft (29.3 m)
Deck width12 ft (3.8 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deck11 ft (3.3 m)

Traffic and service

Average daily traffic30 (2023)
Projected traffic51 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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$927,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Swinging Br RD over Mill CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1978.

What condition is Swinging Br RD over Mill 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 Swinging Br RD over Mill CR carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Swinging Br RD over Mill CR?

The structure is 135 ft (41.1 m) long with a longest span of 96 ft (29.3 m) and a deck 12 ft wide.

Who owns Swinging Br RD over Mill CR?

It is owned by the County Highway Agency.