US Bridges

Niantic RD over S Fork Lake Fork Ck

Fair

Logan County, Illinois · 1.5 MI S Latham · Structure no. 054301200000000

Built
1969
56 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
117 ft
3 main spans
Daily traffic
225
2020 count
Owner
County
County Highway Agency

About this bridge

Niantic RD over S Fork Lake Fork Ck is a steel continuous stringer/multi-beam or girder carrying Niantic RD over S Fork Lake Fork Ck in Logan County, Illinois. It was built in 1969, so it is 56 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 225 vehicles a day, roughly 9% of them trucks, projected to reach 210 by 2046. The structure is 117 ft (35.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNiantic RD
CrossesS Fork Lake Fork Ck
Location1.5 MI S Latham
RouteCounty Highway 0
CountyLogan County
StateIllinois
Coordinates39.94129, -89.16249
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.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length117 ft (35.7 m)
Longest span41 ft (12.5 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2020)
Projected traffic210 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 Niantic RD over S Fork Lake Fork Ck built?

It was built in 1969, making it 56 years old in 2025.

What condition is Niantic RD over S Fork Lake Fork Ck 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 2023.

How much traffic does Niantic RD over S Fork Lake Fork Ck carry?

About 225 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is Niantic RD over S Fork Lake Fork Ck?

The structure is 117 ft (35.7 m) long with a longest span of 41 ft (12.5 m) and a deck 31 ft wide.

Who owns Niantic RD over S Fork Lake Fork Ck?

It is owned by the County Highway Agency.