US Bridges

Miles Carnahan RD over Cockerel Branch

Good

Gallatin County, Illinois · 0.8 MI W FAS 902 · Structure no. 030313000000000

Built
2010
15 years old
Condition
Good
inspected August 2021
Type
Channel Beam
Concrete
Length
40 ft
1 main span
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Miles Carnahan RD over Cockerel Branch is a concrete channel beam carrying Miles Carnahan RD over Cockerel Branch in Gallatin County, Illinois. It was built in 2010, so it is 15 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 50 vehicles a day, roughly 22% of them trucks, projected to reach 51 by 2046. The structure is 40 ft (12.1 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesMiles Carnahan RD
CrossesCockerel Branch
Location0.8 MI W FAS 902
RouteCounty Highway 0
CountyGallatin County
StateIllinois
Coordinates37.73119, -88.36347
Functional classRural 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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.1 m)
Longest span37 ft (11.3 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic51 by 2046
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Miles Carnahan RD over Cockerel Branch built?

It was built in 2010, making it 15 years old in 2025.

What condition is Miles Carnahan RD over Cockerel Branch 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 August 2021.

How much traffic does Miles Carnahan RD over Cockerel Branch carry?

About 50 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Miles Carnahan RD over Cockerel Branch?

The structure is 40 ft (12.1 m) long with a longest span of 37 ft (11.3 m) and a deck 26 ft wide.

Who owns Miles Carnahan RD over Cockerel Branch?

It is owned by the Town or Township Highway Agency.