US Bridges

Ill 47 over Brewster Run

Fair

Grundy County, Illinois · N of I-55 · Structure no. 032011000000000

Built
2004
21 years old
Condition
Fair
inspected January 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
3,600
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 47 over Brewster Run is a steel stringer/multi-beam or girder carrying Ill 47 over Brewster Run in Grundy County, Illinois. It was built in 2004, so it is 21 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 3,600 vehicles a day, roughly 25% of them trucks, projected to reach 4,560 by 2046. The structure is 70 ft (21.3 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIll 47
CrossesBrewster Run
LocationN of I-55
RouteState Highway 47
CountyGrundy County
StateIllinois
Coordinates41.12211, -88.4141
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span68 ft (20.6 m)
Deck width52 ft (15.9 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2023)
Projected traffic4,560 by 2046
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 47 over Brewster Run built?

It was built in 2004, making it 21 years old in 2025.

What condition is Ill 47 over Brewster Run 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 January 2022.

How much traffic does Ill 47 over Brewster Run carry?

About 3,600 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is Ill 47 over Brewster Run?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.6 m) and a deck 52 ft wide.

Who owns Ill 47 over Brewster Run?

It is owned by the State Highway Agency.