US Bridges

Irr#co RD 557 over San Juan River

Fair

Archuleta County, Colorado · 3.4 MI SW of Camado · Structure no. AR557-SO.3-500A

Built
2010
15 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
3 main spans
Daily traffic
142
2022 count
Owner
County
County Highway Agency

About this bridge

Irr#co RD 557 over San Juan River is a steel stringer/multi-beam or girder carrying Irr#co RD 557 over San Juan River in Archuleta County, Colorado. It was built in 2010, so it is 15 years old, younger 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 6 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 142 vehicles a day, projected to reach 168 by 2042. The structure is 208 ft (63.4 m) long and 25 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

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CarriesIrr#co RD 557
CrossesSan Juan River
Location3.4 MI SW of Camado
RouteCounty Highway 0
CountyArchuleta County
StateColorado
Coordinates37.00124, -107.24394
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating51.1 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span67 ft (20.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic142 (2022)
Projected traffic168 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 Irr#co RD 557 over San Juan River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Irr#co RD 557 over San Juan River 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 October 2024.

How much traffic does Irr#co RD 557 over San Juan River carry?

About 142 vehicles per day (2022 count).

How long is Irr#co RD 557 over San Juan River?

The structure is 208 ft (63.4 m) long with a longest span of 67 ft (20.4 m) and a deck 25 ft wide.

Who owns Irr#co RD 557 over San Juan River?

It is owned by the County Highway Agency.