US Bridges

SH 13 Ml over Yampa River

Fair

Moffat County, Colorado · 2 MI S. of Craig · Structure no. C-06-D

Built
1972
53 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
378 ft
4 main spans
Daily traffic
2,800
2020 count
Owner
State
State Highway Agency

About this bridge

SH 13 Ml over Yampa River is a prestressed concrete stringer/multi-beam or girder carrying SH 13 Ml over Yampa River in Moffat County, Colorado. It was built in 1972, so it is 53 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 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 2,800 vehicles a day, roughly 14% of them trucks, projected to reach 3,248 by 2040. The structure is 378 ft (115.3 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSH 13 Ml
CrossesYampa River
Location2 MI S. of Craig
RouteState Highway 13A
Coordinates40.4845, -107.6071
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.5 US tons
Inventory rating43.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length378 ft (115.3 m)
Longest span92 ft (28 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2020)
Projected traffic3,248 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SH 13 Ml over Yampa River built?

It was built in 1972, making it 53 years old in 2025.

What condition is SH 13 Ml over Yampa 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 July 2024.

How much traffic does SH 13 Ml over Yampa River carry?

About 2,800 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is SH 13 Ml over Yampa River?

The structure is 378 ft (115.3 m) long with a longest span of 92 ft (28 m) and a deck 46 ft wide.

Who owns SH 13 Ml over Yampa River?

It is owned by the State Highway Agency.