US Bridges

FAS268 A/Ch 15 over Mill Race

Good

LaSalle County, Illinois · Ch 15/S Mill Race · Structure no. 050690200000000

Built
1937
88 years old, rebuilt 2008
Condition
Good
inspected May 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
3,450
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAS268 A/Ch 15 over Mill Race is a prestressed concrete box beam or girders - multiple carrying FAS268 A/Ch 15 over Mill Race in LaSalle County, Illinois. It was built in 1937 and reconstructed in 2008, so it is 88 years old, older 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 3,450 vehicles a day, roughly 10% of them trucks, projected to reach 3,485 by 2046. The structure is 76 ft (23.3 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesFAS268 A/Ch 15
CrossesMill Race
LocationCh 15/S Mill Race
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.32609, -88.70964
Functional classRural Major 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span74 ft (22.6 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,450 (2020)
Projected traffic3,485 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 FAS268 A/Ch 15 over Mill Race built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 2008.

What condition is FAS268 A/Ch 15 over Mill Race 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 May 2022.

How much traffic does FAS268 A/Ch 15 over Mill Race carry?

About 3,450 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is FAS268 A/Ch 15 over Mill Race?

The structure is 76 ft (23.3 m) long with a longest span of 74 ft (22.6 m) and a deck 36 ft wide.

Who owns FAS268 A/Ch 15 over Mill Race?

It is owned by the City or Municipal Highway Agency.