US Bridges

Aviston Rd/Fas 785 over Lake Branch

Fair

Clinton County, Illinois · 2 MI South Aviston · Structure no. 014510400000000

Built
1990
35 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
101 ft
3 main spans
Daily traffic
2,650
2020 count
Owner
County
County Highway Agency

About this bridge

Aviston Rd/Fas 785 over Lake Branch is a prestressed concrete box beam or girders - multiple carrying Aviston Rd/Fas 785 over Lake Branch in Clinton County, Illinois. It was built in 1990, so it is 35 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 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 2,650 vehicles a day, roughly 9% of them trucks, projected to reach 2,915 by 2046. The structure is 101 ft (30.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAviston Rd/Fas 785
CrossesLake Branch
Location2 MI South Aviston
RouteCounty Highway 0
CountyClinton County
StateIllinois
Coordinates38.57767, -89.6121
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment7: Better than present minimum criteria
Operating rating90.4 US tons
Inventory rating53.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length101 ft (30.9 m)
Longest span40 ft (12.2 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2020)
Projected traffic2,915 by 2046
Trucks9%
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

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 Aviston Rd/Fas 785 over Lake Branch built?

It was built in 1990, making it 35 years old in 2025.

What condition is Aviston Rd/Fas 785 over Lake 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 Aviston Rd/Fas 785 over Lake Branch carry?

About 2,650 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is Aviston Rd/Fas 785 over Lake Branch?

The structure is 101 ft (30.9 m) long with a longest span of 40 ft (12.2 m) and a deck 32 ft wide.

Who owns Aviston Rd/Fas 785 over Lake Branch?

It is owned by the County Highway Agency.