US Bridges

TR 251-ROTARY RD over I-39 & US 51

Fair

Winnebago County, Illinois · 1.5 MI N of Ogle CO · Structure no. 101014400000000

Built
1980
45 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
261 ft
2 main spans
Daily traffic
300
2022 count
Owner
State
State Highway Agency

About this bridge

TR 251-ROTARY RD over I-39 & US 51 is a steel continuous stringer/multi-beam or girder carrying TR 251-ROTARY RD over I-39 & US 51 in Winnebago County, Illinois. It was built in 1980, so it is 45 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 6 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 300 vehicles a day, roughly 4% of them trucks, projected to reach 455 by 2046. The structure is 261 ft (79.6 m) long and 42 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTR 251-ROTARY RD
CrossesI-39 & US 51
Location1.5 MI N of Ogle CO
RouteCounty Highway 0
CountyWinnebago County
StateIllinois
Coordinates42.17314, -89.02352
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length261 ft (79.6 m)
Longest span106 ft (32.3 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic455 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 TR 251-ROTARY RD over I-39 & US 51 built?

It was built in 1980, making it 45 years old in 2025.

What condition is TR 251-ROTARY RD over I-39 & US 51 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 April 2024.

How much traffic does TR 251-ROTARY RD over I-39 & US 51 carry?

About 300 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is TR 251-ROTARY RD over I-39 & US 51?

The structure is 261 ft (79.6 m) long with a longest span of 106 ft (32.3 m) and a deck 42 ft wide.

Who owns TR 251-ROTARY RD over I-39 & US 51?

It is owned by the State Highway Agency.