US Bridges

Coll 7621 over Warm Slough

Good

Merrick County, Nebraska · .5W Central City · Structure no. C006102905

Built
1999
26 years old
Condition
Good
inspected November 2021
Type
Culvert
Steel
Length
51 ft
6 main spans
Daily traffic
900
1998 count
Owner
County
County Highway Agency

About this bridge

Coll 7621 over Warm Slough is a steel culvert carrying Coll 7621 over Warm Slough in Merrick County, Nebraska. It was built in 1999, so it is 26 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 900 vehicles a day, projected to reach 1,530 by 2033. The structure is 51 ft (15.5 m) long. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesColl 7621
CrossesWarm Slough
Location.5W Central City
RouteCounty Highway 7621
CountyMerrick County
StateNebraska
Coordinates41.1153, -98.02
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
Channel and channel protection7 GoodSome minor problems.
Culvert9 ExcellentNo problems noted.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans6
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (1998)
Projected traffic1,530 by 2033
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Coll 7621 over Warm Slough built?

It was built in 1999, making it 26 years old in 2025.

What condition is Coll 7621 over Warm Slough 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 2021.

How much traffic does Coll 7621 over Warm Slough carry?

About 900 vehicles per day (1998 count).

How long is Coll 7621 over Warm Slough?

The structure is 51 ft (15.5 m) long with a longest span of 6 ft (1.8 m).

Who owns Coll 7621 over Warm Slough?

It is owned by the County Highway Agency.