US Bridges

Campus Road over Trib to Mazon River

Fair

Grundy County, Illinois · 0.2 MI S TR 159 · Structure no. 032338000000000

Built
1955
70 years old
Condition
Fair
inspected October 2024
Type
Frame
Concrete
Length
51 ft
1 main span
Daily traffic
900
2024 count
Owner
County
County Highway Agency

About this bridge

Campus Road over Trib to Mazon River is a concrete frame carrying Campus Road over Trib to Mazon River in Grundy County, Illinois. It was built in 1955, so it is 70 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 900 vehicles a day, roughly 37% of them trucks, projected to reach 1,020 by 2046. The structure is 51 ft (15.5 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCampus Road
CrossesTrib to Mazon River
Location0.2 MI S TR 159
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.13918, -88.30906
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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 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 rating44 US tons
Inventory rating26.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 15
Structure length51 ft (15.5 m)
Longest span48 ft (14.6 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2024)
Projected traffic1,020 by 2046
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Campus Road over Trib to Mazon River built?

It was built in 1955, making it 70 years old in 2025.

What condition is Campus Road over Trib to Mazon River 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 October 2024.

How much traffic does Campus Road over Trib to Mazon River carry?

About 900 vehicles per day (2024 count), of which roughly 37% are trucks.

How long is Campus Road over Trib to Mazon River?

The structure is 51 ft (15.5 m) long with a longest span of 48 ft (14.6 m) and a deck 29 ft wide.

Who owns Campus Road over Trib to Mazon River?

It is owned by the County Highway Agency.