US Bridges

Comb Ave over UP RR

FairPosted for load

Mercer County, Missouri · S 31 T 66 N R 23 W · Structure no. 15056

Built
1935
90 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
211 ft
12 main spans
Daily traffic
45
2024 count
Owner
County
County Highway Agency

About this bridge

Comb Ave over UP RR is a wood or timber stringer/multi-beam or girder carrying Comb Ave over UP RR in Mercer County, Missouri. It was built in 1935, so it is 90 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 45 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2044. The structure is 211 ft (64.3 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesComb Ave
CrossesUP RR
LocationS 31 T 66 N R 23 W
RouteCounty Highway 84
CountyMercer County
StateMissouri
Coordinates40.48447, -93.53506
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
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 rating22.8 US tons
Inventory rating16.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans12
Design loadOther
Structure length211 ft (64.3 m)
Longest span22 ft (6.7 m)
Deck width23 ft (7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2024)
Projected traffic50 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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$928,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Comb Ave over UP RR built?

It was built in 1935, making it 90 years old in 2025.

What condition is Comb Ave 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 December 2023.

How much traffic does Comb Ave over UP RR carry?

About 45 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Comb Ave over UP RR?

The structure is 211 ft (64.3 m) long with a longest span of 22 ft (6.7 m) and a deck 23 ft wide.

Who owns Comb Ave over UP RR?

It is owned by the County Highway Agency.