US Bridges

N Carter Road over East Fork Plum River

Fair

Carroll County, Illinois · 5 MI NE Mt Carroll · Structure no. 008322100000000

Built
1975
50 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
75
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

N Carter Road over East Fork Plum River is a steel stringer/multi-beam or girder carrying N Carter Road over East Fork Plum River in Carroll County, Illinois. It was built in 1975, so it is 50 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 75 vehicles a day, roughly 35% of them trucks, projected to reach 76 by 2046. The structure is 67 ft (20.4 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesN Carter Road
CrossesEast Fork Plum River
Location5 MI NE Mt Carroll
RouteCounty Highway 0
Coordinates42.17713, -89.91726
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating23.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length67 ft (20.4 m)
Longest span64 ft (19.4 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2021)
Projected traffic76 by 2046
Trucks35%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 N Carter Road over East Fork Plum River built?

It was built in 1975, making it 50 years old in 2025.

What condition is N Carter Road over East Fork Plum River 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 Carter Road over East Fork Plum River carry?

About 75 vehicles per day (2021 count), of which roughly 35% are trucks.

How long is N Carter Road over East Fork Plum River?

The structure is 67 ft (20.4 m) long with a longest span of 64 ft (19.4 m) and a deck 22 ft wide.

Who owns N Carter Road over East Fork Plum River?

It is owned by the Town or Township Highway Agency.