US Bridges

Welland RD over I-39 & US 51

Good

Lee County, Illinois · On Lee-Lasalle CO · Structure no. 052005900000000

Built
1983
42 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
262 ft
2 main spans
Daily traffic
350
2020 count
Owner
State
State Highway Agency

About this bridge

Welland RD over I-39 & US 51 is a steel continuous stringer/multi-beam or girder carrying Welland RD over I-39 & US 51 in Lee County, Illinois. It was built in 1983, so it is 42 years old, younger 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 350 vehicles a day, roughly 14% of them trucks, projected to reach 354 by 2046. The structure is 262 ft (79.9 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesWelland RD
CrossesI-39 & US 51
LocationOn Lee-Lasalle CO
RouteCounty Highway 0
Coordinates41.62686, -89.06107
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length262 ft (79.9 m)
Longest span106 ft (32.2 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2020)
Projected traffic354 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Welland RD over I-39 & US 51 built?

It was built in 1983, making it 42 years old in 2025.

What condition is Welland RD over I-39 & US 51 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 December 2023.

How much traffic does Welland RD over I-39 & US 51 carry?

About 350 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is Welland RD over I-39 & US 51?

The structure is 262 ft (79.9 m) long with a longest span of 106 ft (32.2 m) and a deck 30 ft wide.

Who owns Welland RD over I-39 & US 51?

It is owned by the State Highway Agency.