US Bridges

Drainage Dicth over Ch 48 (303rd St)

Good

Rock Island County, Illinois · 3.5 MI N Hillsdale · Structure no. 081502200000000

Built
1988
37 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
475
2020 count
Owner
County
County Highway Agency

About this bridge

Drainage Dicth over Ch 48 (303rd St) is a concrete culvert carrying Drainage Dicth over Ch 48 (303rd St) in Rock Island County, Illinois. It was built in 1988, so it is 37 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 475 vehicles a day, roughly 29% of them trucks, projected to reach 480 by 2046. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesDrainage Dicth
CrossesCh 48 (303rd St)
Location3.5 MI N Hillsdale
RouteCounty Highway 0
CountyRock Island County
StateIllinois
Coordinates41.66419, -90.20741
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.1 US tons
Inventory rating62.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2020)
Projected traffic480 by 2046
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Drainage Dicth over Ch 48 (303rd St) built?

It was built in 1988, making it 37 years old in 2025.

What condition is Drainage Dicth over Ch 48 (303rd St) 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 2022.

How much traffic does Drainage Dicth over Ch 48 (303rd St) carry?

About 475 vehicles per day (2020 count), of which roughly 29% are trucks.

How long is Drainage Dicth over Ch 48 (303rd St)?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns Drainage Dicth over Ch 48 (303rd St)?

It is owned by the County Highway Agency.