US Bridges

FAU-168 (wilmot RD over Nippersink Creek

Fair

McHenry County, Illinois · 0.2 Mi. N. U.S. 12 · Structure no. 056300100000000

Built
1960
65 years old, rebuilt 2015
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
7,200
2021 count
Owner
County
County Highway Agency

About this bridge

FAU-168 (wilmot RD over Nippersink Creek is a prestressed concrete box beam or girders - multiple carrying FAU-168 (wilmot RD over Nippersink Creek in McHenry County, Illinois. It was built in 1960 and reconstructed in 2015, so it is 65 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 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 7,200 vehicles a day, roughly 10% of them trucks, projected to reach 8,640 by 2046. The structure is 133 ft (40.5 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFAU-168 (wilmot RD
CrossesNippersink Creek
Location0.2 Mi. N. U.S. 12
CountyMcHenry County
StateIllinois
Coordinates42.43485, -88.21911
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating57.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length133 ft (40.5 m)
Longest span43 ft (13.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2021)
Projected traffic8,640 by 2046
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$480,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU-168 (wilmot RD over Nippersink Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2015.

What condition is FAU-168 (wilmot RD over Nippersink Creek 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 August 2023.

How much traffic does FAU-168 (wilmot RD over Nippersink Creek carry?

About 7,200 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is FAU-168 (wilmot RD over Nippersink Creek?

The structure is 133 ft (40.5 m) long with a longest span of 43 ft (13.1 m) and a deck 27 ft wide.

Who owns FAU-168 (wilmot RD over Nippersink Creek?

It is owned by the County Highway Agency.