US Bridges

County RD 53.7 over Unnamed Natural Drainage

Fair

Las Animas County, Colorado · 0.3 MI S of CR 42 · Structure no. LA53.7-28-20-34

Built
1935
90 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
3
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 53.7 over Unnamed Natural Drainage is a steel stringer/multi-beam or girder carrying County RD 53.7 over Unnamed Natural Drainage in Las Animas County, Colorado. It was built in 1935, so it is 90 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3 vehicles a day, projected to reach 4 by 2042. The structure is 27 ft (8.2 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty RD 53.7
CrossesUnnamed Natural Drainage
Location0.3 MI S of CR 42
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.28069, -104.64759
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.6 US tons
Inventory rating15.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3 (2022)
Projected traffic4 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 53.7 over Unnamed Natural Drainage built?

It was built in 1935, making it 90 years old in 2025.

What condition is County RD 53.7 over Unnamed Natural Drainage in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does County RD 53.7 over Unnamed Natural Drainage carry?

About 3 vehicles per day (2022 count).

How long is County RD 53.7 over Unnamed Natural Drainage?

The structure is 27 ft (8.2 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns County RD 53.7 over Unnamed Natural Drainage?

It is owned by the County Highway Agency.