US Bridges

N Loran Route over Br. E. Fk. Plum Riv

Fair

Carroll County, Illinois · 5.7 MI NE Mt.Carroll · Structure no. 008320600000000

Built
1955
70 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
200
2024 count
Owner
County
County Highway Agency

About this bridge

N Loran Route over Br. E. Fk. Plum Riv is a concrete culvert carrying N Loran Route over Br. E. Fk. Plum Riv in Carroll County, Illinois. It was built in 1955, so it is 70 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 5 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 200 vehicles a day, roughly 7% of them trucks, projected to reach 202 by 2046. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesN Loran Route
CrossesBr. E. Fk. Plum Riv
Location5.7 MI NE Mt.Carroll
RouteCounty Highway 0
CountyCarroll County
StateIllinois
Coordinates42.17756, -89.92719
Functional classRural Major Collector

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating39.2 US tons
Inventory rating23.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length32 ft (9.8 m)
Longest span16 ft (4.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic202 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 N Loran Route over Br. E. Fk. Plum Riv built?

It was built in 1955, making it 70 years old in 2025.

What condition is N Loran Route over Br. E. Fk. Plum Riv 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 June 2024.

How much traffic does N Loran Route over Br. E. Fk. Plum Riv carry?

About 200 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is N Loran Route over Br. E. Fk. Plum Riv?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.8 m).

Who owns N Loran Route over Br. E. Fk. Plum Riv?

It is owned by the County Highway Agency.