US Bridges

Ch 21 Sand RD over I-88 & Stream

Good

Whiteside County, Illinois · 2.5 Mi. Nw. Erie · Structure no. 098005600000000

Built
1975
50 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
541 ft
3 main spans
Daily traffic
400
2021 count
Owner
State
State Highway Agency

About this bridge

Ch 21 Sand RD over I-88 & Stream is a steel continuous stringer/multi-beam or girder carrying Ch 21 Sand RD over I-88 & Stream in Whiteside County, Illinois. It was built in 1975, so it is 50 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 400 vehicles a day, roughly 11% of them trucks, projected to reach 404 by 2046. The structure is 541 ft (165 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesCh 21 Sand RD
CrossesI-88 & Stream
Location2.5 Mi. Nw. Erie
RouteCounty Highway 0
Coordinates41.68034, -90.13154
Functional classRural Minor 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating31.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 15
Structure length541 ft (165 m)
Longest span184 ft (56.2 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2021)
Projected traffic404 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed11.2 mi (18 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 Ch 21 Sand RD over I-88 & Stream built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ch 21 Sand RD over I-88 & Stream 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 September 2024.

How much traffic does Ch 21 Sand RD over I-88 & Stream carry?

About 400 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Ch 21 Sand RD over I-88 & Stream?

The structure is 541 ft (165 m) long with a longest span of 184 ft (56.2 m) and a deck 30 ft wide.

Who owns Ch 21 Sand RD over I-88 & Stream?

It is owned by the State Highway Agency.