US Bridges

Flagpole RD over UP RR

FairPosted for load

Mercer County, Missouri · S 6 T 65 N R 23 W · Structure no. 17449

Built
1940
85 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
120 ft
5 main spans
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

Flagpole RD over UP RR is a wood or timber stringer/multi-beam or girder carrying Flagpole RD over UP RR in Mercer County, Missouri. It was built in 1940, so it is 85 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: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2044. The structure is 120 ft (36.6 m) long and 21 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFlagpole RD
CrossesUP RR
LocationS 6 T 65 N R 23 W
RouteCounty Highway 153
CountyMercer County
StateMissouri
Coordinates40.46595, -93.53405
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating17.9 US tons
Inventory rating12.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadOther
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic110 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$570,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Flagpole RD over UP RR built?

It was built in 1940, making it 85 years old in 2025.

What condition is Flagpole RD over UP RR 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 2024.

How much traffic does Flagpole RD over UP RR carry?

About 100 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Flagpole RD over UP RR?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Flagpole RD over UP RR?

It is owned by the County Highway Agency.