US Bridges

FAS 1781/CH2-HOPEW over Allen Branch

Fair

Clinton County, Illinois · 2.5M SW of Keyesport · Structure no. 014510100000000

Built
1982
43 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
675
2020 count
Owner
County
County Highway Agency

About this bridge

FAS 1781/CH2-HOPEW over Allen Branch is a prestressed concrete box beam or girders - multiple carrying FAS 1781/CH2-HOPEW over Allen Branch in Clinton County, Illinois. It was built in 1982, so it is 43 years old, younger 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 675 vehicles a day, roughly 7% of them trucks, projected to reach 743 by 2046. The structure is 50 ft (15.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 1781/CH2-HOPEW
CrossesAllen Branch
Location2.5M SW of Keyesport
RouteCounty Highway 0
CountyClinton County
StateIllinois
Coordinates38.70261, -89.32858
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.3 m)
Longest span46 ft (14 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic675 (2020)
Projected traffic743 by 2046
Trucks7%
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 1781/CH2-HOPEW over Allen Branch built?

It was built in 1982, making it 43 years old in 2025.

What condition is FAS 1781/CH2-HOPEW over Allen 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 January 2025.

How much traffic does FAS 1781/CH2-HOPEW over Allen Branch carry?

About 675 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is FAS 1781/CH2-HOPEW over Allen Branch?

The structure is 50 ft (15.3 m) long with a longest span of 46 ft (14 m) and a deck 30 ft wide.

Who owns FAS 1781/CH2-HOPEW over Allen Branch?

It is owned by the County Highway Agency.