US Bridges

Conger RD over Branch Mill CR

Fair

Ogle County, Illinois · 3 MI NW Byron · Structure no. 071503900000000

Built
1969
56 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
250
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Conger RD over Branch Mill CR is a concrete culvert carrying Conger RD over Branch Mill CR in Ogle County, Illinois. It was built in 1969, so it is 56 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 250 vehicles a day, roughly 46% of them trucks, projected to reach 260 by 2046. The structure is 22 ft (6.7 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesConger RD
CrossesBranch Mill CR
Location3 MI NW Byron
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.14252, -89.31709
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 15
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width31 ft (9.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic260 by 2046
Trucks46%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Conger RD over Branch Mill CR built?

It was built in 1969, making it 56 years old in 2025.

What condition is Conger RD over Branch Mill CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Conger RD over Branch Mill CR carry?

About 250 vehicles per day (2022 count), of which roughly 46% are trucks.

How long is Conger RD over Branch Mill CR?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns Conger RD over Branch Mill CR?

It is owned by the Town or Township Highway Agency.