US Bridges

Mont. CO TR 75B over Ohlman Branch

Fair

Christian County, Illinois · 0.3 MI NW Ohlman · Structure no. 011327300000000

Built
1940
85 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
44 ft
1 main span
Daily traffic
150
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mont. CO TR 75B over Ohlman Branch is a steel stringer/multi-beam or girder carrying Mont. CO TR 75B over Ohlman Branch in Christian County, Illinois. It was built in 1940, so it is 85 years old, older than the Illinois average of 45.3 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 150 vehicles a day, roughly 13% of them trucks, projected to reach 152 by 2046. The structure is 44 ft (13.4 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMont. CO TR 75B
CrossesOhlman Branch
Location0.3 MI NW Ohlman
RouteCounty Highway 0
CountyChristian County
StateIllinois
Coordinates39.34881, -89.22701
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length44 ft (13.4 m)
Longest span43 ft (13 m)
Deck width23 ft (7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic152 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Mont. CO TR 75B over Ohlman Branch built?

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

What condition is Mont. CO TR 75B over Ohlman Branch 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 Mont. CO TR 75B over Ohlman Branch carry?

About 150 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is Mont. CO TR 75B over Ohlman Branch?

The structure is 44 ft (13.4 m) long with a longest span of 43 ft (13 m) and a deck 23 ft wide.

Who owns Mont. CO TR 75B over Ohlman Branch?

It is owned by the Town or Township Highway Agency.