US Bridges

County RD 8.8 over San Isidro Creek

Good

Las Animas County, Colorado · .1 MI E of CR 105.8 · Structure no. LA8.8-54-5-92A

Built
1994
31 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
105 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 8.8 over San Isidro Creek is a prestressed concrete stringer/multi-beam or girder carrying County RD 8.8 over San Isidro Creek in Las Animas County, Colorado. It was built in 1994, so it is 31 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 15 vehicles a day, projected to reach 19 by 2042. The structure is 105 ft (32 m) long and 32 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesCounty RD 8.8
CrossesSan Isidro Creek
Location.1 MI E of CR 105.8
RouteCounty Highway 0
CountyLas Animas County
StateColorado
Coordinates37.05671, -104.18066
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.7 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span100 ft (30.6 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic19 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 RD 8.8 over San Isidro Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is County RD 8.8 over San Isidro Creek 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 June 2023.

How much traffic does County RD 8.8 over San Isidro Creek carry?

About 15 vehicles per day (2022 count).

How long is County RD 8.8 over San Isidro Creek?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.6 m) and a deck 32 ft wide.

Who owns County RD 8.8 over San Isidro Creek?

It is owned by the County Highway Agency.