US Bridges

SH 21B Nbnd Ml over Kettle Creek

Good

El Paso County, Colorado · Nbnd Powers · Structure no. I-17-MJ

Built
2005
20 years old
Condition
Good
inspected January 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
458 ft
3 main spans
Daily traffic
37,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 21B Nbnd Ml over Kettle Creek is a steel continuous girder and floorbeam system carrying SH 21B Nbnd Ml over Kettle Creek in El Paso County, Colorado. It was built in 2005, so it is 20 years old, younger than the Colorado average of 42.2 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 37,000 vehicles a day, roughly 3% of them trucks, projected to reach 54,390 by 2040. The structure is 458 ft (139.6 m) long and 73 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSH 21B Nbnd Ml
CrossesKettle Creek
LocationNbnd Powers
RouteState Highway 21B
Coordinates38.99521, -104.77689
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length458 ft (139.6 m)
Longest span175 ft (53.3 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2020)
Projected traffic54,390 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 21B Nbnd Ml over Kettle Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is SH 21B Nbnd Ml over Kettle 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 January 2024.

How much traffic does SH 21B Nbnd Ml over Kettle Creek carry?

About 37,000 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is SH 21B Nbnd Ml over Kettle Creek?

The structure is 458 ft (139.6 m) long with a longest span of 175 ft (53.3 m) and a deck 73 ft wide.

Who owns SH 21B Nbnd Ml over Kettle Creek?

It is owned by the State Highway Agency.