US Bridges

Ill 113/FAS 301 over Br of Mazon River

Fair

Grundy County, Illinois · 2.75 M. E. of Il 47 · Structure no. 032200700000000

Built
2003
22 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
4,450
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 113/FAS 301 over Br of Mazon River is a concrete culvert carrying Ill 113/FAS 301 over Br of Mazon River in Grundy County, Illinois. It was built in 2003, so it is 22 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 4,450 vehicles a day, roughly 6% of them trucks, projected to reach 5,460 by 2046. The structure is 27 ft (8.1 m) long and 67 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIll 113/FAS 301
CrossesBr of Mazon River
Location2.75 M. E. of Il 47
RouteState Highway 113
CountyGrundy County
StateIllinois
Coordinates41.28607, -88.3675
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating59 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span26 ft (8 m)
Deck width67 ft (20.4 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,450 (2023)
Projected traffic5,460 by 2046
Trucks6%
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

OwnerState Highway Agency
Maintained byState 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 Ill 113/FAS 301 over Br of Mazon River built?

It was built in 2003, making it 22 years old in 2025.

What condition is Ill 113/FAS 301 over Br of 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 February 2023.

How much traffic does Ill 113/FAS 301 over Br of Mazon River carry?

About 4,450 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ill 113/FAS 301 over Br of Mazon River?

The structure is 27 ft (8.1 m) long with a longest span of 26 ft (8 m) and a deck 67 ft wide.

Who owns Ill 113/FAS 301 over Br of Mazon River?

It is owned by the State Highway Agency.