US Bridges

County Line RD over National Park Road

Good

Lake County, Indiana · 00.30 N US 12 · Structure no. 4500158

Built
1992
33 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
95 ft
1 main span
Daily traffic
3,494
2018 count
Owner
County
County Highway Agency

About this bridge

County Line RD over National Park Road is a concrete slab carrying County Line RD over National Park Road in Lake County, Indiana. It was built in 1992, so it is 33 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,494 vehicles a day, roughly 3% of them trucks, projected to reach 4,306 by 2038. The structure is 95 ft (29.1 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Line RD
CrossesNational Park Road
Location00.30 N US 12
RouteCity Street 0
CountyLake County
StateIndiana
Coordinates41.61416, -87.22255
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length95 ft (29.1 m)
Longest span93 ft (28.2 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,494 (2018)
Projected traffic4,306 by 2038
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Line RD over National Park Road built?

It was built in 1992, making it 33 years old in 2025.

What condition is County Line RD over National Park Road 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 2024.

How much traffic does County Line RD over National Park Road carry?

About 3,494 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is County Line RD over National Park Road?

The structure is 95 ft (29.1 m) long with a longest span of 93 ft (28.2 m) and a deck 47 ft wide.

Who owns County Line RD over National Park Road?

It is owned by the County Highway Agency.