US Bridges

Ill 104 over Lake Sangchris

Good

Christian County, Illinois · .25 E Sang CO · Structure no. 011001900000000

Built
1965
60 years old, rebuilt 1998
Condition
Good
inspected March 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 104 over Lake Sangchris is a prestressed concrete box beam or girders - multiple carrying Ill 104 over Lake Sangchris in Christian County, Illinois. It was built in 1965 and reconstructed in 1998, so it is 60 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,700 vehicles a day, roughly 10% of them trucks, projected to reach 2,980 by 2046. The structure is 93 ft (28.3 m) long and 36 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIll 104
CrossesLake Sangchris
Location.25 E Sang CO
RouteState Highway 104
CountyChristian County
StateIllinois
Coordinates39.59016, -89.52978
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating48.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span37 ft (11.2 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic2,980 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$428,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 104 over Lake Sangchris built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1998.

What condition is Ill 104 over Lake Sangchris in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2021.

How much traffic does Ill 104 over Lake Sangchris carry?

About 2,700 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 104 over Lake Sangchris?

The structure is 93 ft (28.3 m) long with a longest span of 37 ft (11.2 m) and a deck 36 ft wide.

Who owns Ill 104 over Lake Sangchris?

It is owned by the State Highway Agency.