US Bridges

Lyndon Road over French Creek

Fair

Whiteside County, Illinois · 0.7 MI N JCT US 30 · Structure no. 098307400000000

Built
2002
23 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
800
2021 count
Owner
County
County Highway Agency

About this bridge

Lyndon Road over French Creek is a prestressed concrete box beam or girders - multiple carrying Lyndon Road over French Creek in Whiteside County, Illinois. It was built in 2002, so it is 23 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 800 vehicles a day, roughly 13% of them trucks, projected to reach 808 by 2046. The structure is 62 ft (18.9 m) long and 28 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesLyndon Road
CrossesFrench Creek
Location0.7 MI N JCT US 30
RouteCounty Highway 0
CountyWhiteside County
StateIllinois
Coordinates41.81098, -89.92069
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionMay 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 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 length62 ft (18.9 m)
Longest span50 ft (15.2 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2021)
Projected traffic808 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Lyndon Road over French Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Lyndon Road over French Creek 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 May 2024.

How much traffic does Lyndon Road over French Creek carry?

About 800 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Lyndon Road over French Creek?

The structure is 62 ft (18.9 m) long with a longest span of 50 ft (15.2 m) and a deck 28 ft wide.

Who owns Lyndon Road over French Creek?

It is owned by the County Highway Agency.