US Bridges

Coll 7686 over N Br Big Blue River

Good

Polk County, Nebraska · 4S 9.5E of Osceola · Structure no. C007203820

Built
1983
42 years old
Condition
Good
inspected November 2022
Type
Slab
Concrete Continuous
Length
142 ft
3 main spans
Daily traffic
50
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7686 over N Br Big Blue River is a concrete continuous slab carrying Coll 7686 over N Br Big Blue River in Polk County, Nebraska. It was built in 1983, so it is 42 years old, younger than the Nebraska average of 47.1 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 50 vehicles a day, projected to reach 85 by 2041. The structure is 142 ft (43.3 m) long and 30 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

CarriesColl 7686
CrossesN Br Big Blue River
Location4S 9.5E of Osceola
RouteCounty Highway 7686
Coordinates41.1195, -97.3686
Functional classRural Minor Collector

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 protection9 ExcellentNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span56 ft (17.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1998)
Projected traffic85 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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 Coll 7686 over N Br Big Blue River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Coll 7686 over N Br Big Blue River 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 November 2022.

How much traffic does Coll 7686 over N Br Big Blue River carry?

About 50 vehicles per day (1998 count).

How long is Coll 7686 over N Br Big Blue River?

The structure is 142 ft (43.3 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.

Who owns Coll 7686 over N Br Big Blue River?

It is owned by the County Highway Agency.