US Bridges

N Campground LA over Harlow Creek

Good

Jefferson County, Illinois · 1.4MI N of Mt Vernon · Structure no. 041375900000000

Built
2015
10 years old
Condition
Good
inspected December 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
325
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

N Campground LA over Harlow Creek is a prestressed concrete box beam or girders - multiple carrying N Campground LA over Harlow Creek in Jefferson County, Illinois. It was built in 2015, so it is 10 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 325 vehicles a day, roughly 12% of them trucks, projected to reach 328 by 2046. The structure is 54 ft (16.6 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN Campground LA
CrossesHarlow Creek
Location1.4MI N of Mt Vernon
RouteCounty Highway 0
Coordinates38.35706, -88.83525
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 inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: 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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length54 ft (16.6 m)
Longest span52 ft (15.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2021)
Projected traffic328 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Campground LA over Harlow Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is N Campground LA over Harlow Creek 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 December 2021.

How much traffic does N Campground LA over Harlow Creek carry?

About 325 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is N Campground LA over Harlow Creek?

The structure is 54 ft (16.6 m) long with a longest span of 52 ft (15.8 m) and a deck 24 ft wide.

Who owns N Campground LA over Harlow Creek?

It is owned by the Town or Township Highway Agency.