US Bridges

24th ST Rock Islan over Stream

Good

Rock Island County, Illinois · .2 MI N of Ill 5 · Structure no. 081008700000000

Built
1933
92 years old, rebuilt 2005
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
7,700
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

24th ST Rock Islan over Stream is a prestressed concrete box beam or girders - multiple carrying 24th ST Rock Islan over Stream in Rock Island County, Illinois. It was built in 1933 and reconstructed in 2005, so it is 92 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 7,700 vehicles a day, roughly 3% of them trucks, projected to reach 6,363 by 2046. The structure is 43 ft (13 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries24th ST Rock Islan
CrossesStream
Location.2 MI N of Ill 5
Coordinates41.4672, -90.56545
Functional classUrban Minor Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length43 ft (13 m)
Longest span41 ft (12.6 m)
Deck width48 ft (14.6 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,700 (2023)
Projected traffic6,363 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

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 24th ST Rock Islan over Stream built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2005.

What condition is 24th ST Rock Islan over 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 March 2024.

How much traffic does 24th ST Rock Islan over Stream carry?

About 7,700 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is 24th ST Rock Islan over Stream?

The structure is 43 ft (13 m) long with a longest span of 41 ft (12.6 m) and a deck 48 ft wide.

Who owns 24th ST Rock Islan over Stream?

It is owned by the City or Municipal Highway Agency.