US Bridges

Park Access Road over Whispering Willow Lk

Good

St. Clair County, Illinois · Frank Holten St. Pk. · Structure no. 082906000000000

Built
2004
21 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
350
2023 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Park Access Road over Whispering Willow Lk is a prestressed concrete box beam or girders - multiple carrying Park Access Road over Whispering Willow Lk in St. Clair 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 350 vehicles a day, roughly 3% of them trucks, projected to reach 707 by 2046. The structure is 65 ft (19.8 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPark Access Road
CrossesWhispering Willow Lk
LocationFrank Holten St. Pk.
CountySt. Clair County
StateIllinois
Coordinates38.59878, -90.09965
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal 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 (+2 approach)
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span64 ft (19.4 m)
Deck width40 ft (12.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck10 ft (3 m)

Traffic and service

Average daily traffic350 (2023)
Projected traffic707 by 2046
Trucks3%
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 Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Park Access Road over Whispering Willow Lk built?

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

What condition is Park Access Road over Whispering Willow Lk 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 November 2023.

How much traffic does Park Access Road over Whispering Willow Lk carry?

About 350 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Park Access Road over Whispering Willow Lk?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.4 m) and a deck 40 ft wide.

Who owns Park Access Road over Whispering Willow Lk?

It is owned by the State Park, Forest, or Reservation Agency.