US Bridges

County RD 22.0 over San Isidro Creek

PoorPosted for load

Las Animas County, Colorado · 1 MI W of CR 107.7 · Structure no. LA22-54-11-89

Built
1967
58 years old
Condition
Poor
inspected June 2024
Type
Truss - Thru
Steel
Length
42 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 22.0 over San Isidro Creek is a steel truss - thru carrying County RD 22.0 over San Isidro Creek in Las Animas County, Colorado. It was built in 1967, so it is 58 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 12 by 2042. The structure is 42 ft (12.8 m) long and 12 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty RD 22.0
CrossesSan Isidro Creek
Location1 MI W of CR 107.7
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.13644, -104.18086
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating19.2 US tons
Inventory rating11.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span36 ft (11.1 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic12 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 22.0 over San Isidro Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is County RD 22.0 over San Isidro Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does County RD 22.0 over San Isidro Creek carry?

About 10 vehicles per day (2022 count).

How long is County RD 22.0 over San Isidro Creek?

The structure is 42 ft (12.8 m) long with a longest span of 36 ft (11.1 m) and a deck 12 ft wide.

Who owns County RD 22.0 over San Isidro Creek?

It is owned by the County Highway Agency.