US Bridges

FAS 1658(CH26) over Mounts Branch

Fair

Clark County, Illinois · 1 MI SW Moriah · Structure no. 012500200000000

Built
1964
61 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
35 ft
3 main spans
Daily traffic
375
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 1658(CH26) over Mounts Branch is a concrete culvert carrying FAS 1658(CH26) over Mounts Branch in Clark County, Illinois. It was built in 1964, so it is 61 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 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 375 vehicles a day, roughly 18% of them trucks, projected to reach 379 by 2046. The structure is 35 ft (10.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 1658(CH26)
CrossesMounts Branch
Location1 MI SW Moriah
RouteCounty Highway 0
CountyClark County
StateIllinois
Coordinates39.20406, -87.95297
Functional classRural Major Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating93.6 US tons
Inventory rating55.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length35 ft (10.6 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2021)
Projected traffic379 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 1658(CH26) over Mounts Branch built?

It was built in 1964, making it 61 years old in 2025.

What condition is FAS 1658(CH26) over Mounts 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 February 2025.

How much traffic does FAS 1658(CH26) over Mounts Branch carry?

About 375 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is FAS 1658(CH26) over Mounts Branch?

The structure is 35 ft (10.6 m) long with a longest span of 10 ft (3.2 m).

Who owns FAS 1658(CH26) over Mounts Branch?

It is owned by the County Highway Agency.