US Bridges

County Road Z over Crooked Arroyo

Good

Otero County, Colorado · 1.8 MI W of SH 350 · Structure no. OT-Z-25-22-131A

Built
1985
40 years old
Condition
Good
inspected November 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
21 ft
1 main span
Daily traffic
172
2022 count
Owner
County
County Highway Agency

About this bridge

County Road Z over Crooked Arroyo is a aluminum, wrought iron, or cast iron culvert carrying County Road Z over Crooked Arroyo in Otero County, Colorado. It was built in 1985, so it is 40 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 172 vehicles a day, roughly 2% of them trucks, projected to reach 195 by 2042. The structure is 21 ft (6.4 m) long and 58 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road Z
CrossesCrooked Arroyo
Location1.8 MI W of SH 350
RouteCounty Highway 0
CountyOtero County
StateColorado
Coordinates37.96811, -103.60897
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating40.2 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width58 ft (17.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic172 (2022)
Projected traffic195 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 County Road Z over Crooked Arroyo built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road Z over Crooked Arroyo 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 2023.

How much traffic does County Road Z over Crooked Arroyo carry?

About 172 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is County Road Z over Crooked Arroyo?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 58 ft wide.

Who owns County Road Z over Crooked Arroyo?

It is owned by the County Highway Agency.