US Bridges

SH21B / Powers over Research Parkway

Good

El Paso County, Colorado · 1.2 MI N of Woodmen · Structure no. I-17-NC

Built
2022
3 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
129 ft
1 main span
Daily traffic
50,000
2022 count
Owner
State
State Highway Agency

About this bridge

SH21B / Powers over Research Parkway is a prestressed concrete stringer/multi-beam or girder carrying SH21B / Powers over Research Parkway in El Paso County, Colorado. It was built in 2022, so it is 3 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 50,000 vehicles a day, roughly 4% of them trucks, projected to reach 68,000 by 2042. The structure is 129 ft (39.3 m) long and 126 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSH21B / Powers
CrossesResearch Parkway
Location1.2 MI N of Woodmen
RouteState Highway 21B
Coordinates38.95639, -104.72717
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length129 ft (39.3 m)
Longest span121 ft (36.9 m)
Deck width126 ft (38.4 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,000 (2022)
Projected traffic68,000 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 SH21B / Powers over Research Parkway built?

It was built in 2022, making it 3 years old in 2025.

What condition is SH21B / Powers over Research Parkway 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 SH21B / Powers over Research Parkway carry?

About 50,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SH21B / Powers over Research Parkway?

The structure is 129 ft (39.3 m) long with a longest span of 121 ft (36.9 m) and a deck 126 ft wide.

Who owns SH21B / Powers over Research Parkway?

It is owned by the State Highway Agency.