US Bridges

County RD 105.5 over Dry Creek

Poor

Las Animas County, Colorado · 1 MI SE of CR 12.5 · Structure no. LA105.5-50-9-83

Built
1930
95 years old
Condition
Poor
inspected June 2024
Type
Truss - Thru
Steel
Length
51 ft
1 main span
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 105.5 over Dry Creek is a steel truss - thru carrying County RD 105.5 over Dry Creek in Las Animas County, Colorado. It was built in 1930, so it is 95 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: open, posting recommended but not legally implemented.

It carries about 10 vehicles a day, projected to reach 12 by 2042. The structure is 51 ft (15.6 m) long and 20 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesCounty RD 105.5
CrossesDry Creek
Location1 MI SE of CR 12.5
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.10871, -104.25223
Functional classRural Major Collector

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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, posting recommended but not legally implemented
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating13.7 US tons
Inventory rating8.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length51 ft (15.6 m)
Longest span48 ft (14.6 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic12 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 105.5 over Dry Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is County RD 105.5 over Dry 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 105.5 over Dry Creek carry?

About 10 vehicles per day (2022 count).

How long is County RD 105.5 over Dry Creek?

The structure is 51 ft (15.6 m) long with a longest span of 48 ft (14.6 m) and a deck 20 ft wide.

Who owns County RD 105.5 over Dry Creek?

It is owned by the County Highway Agency.