US Bridges

I 70 Silt Spur over UP RR

Fair

Garfield County, Colorado · In Silt · Structure no. F-06-T

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
149 ft
3 main spans
Daily traffic
9,800
2020 count
Owner
State
State Highway Agency

About this bridge

I 70 Silt Spur over UP RR is a steel continuous stringer/multi-beam or girder carrying I 70 Silt Spur over UP RR in Garfield 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 9,800 vehicles a day, roughly 5% of them trucks, projected to reach 11,662 by 2040. The structure is 149 ft (45.4 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 70 Silt Spur
CrossesUP RR
LocationIn Silt
RouteState Highway 70E
Coordinates39.546, -107.65368
Functional classRural Major Collector

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.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.8 US tons
Inventory rating32.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length149 ft (45.4 m)
Longest span67 ft (20.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,800 (2020)
Projected traffic11,662 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$491,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 70 Silt Spur over UP RR built?

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

What condition is I 70 Silt Spur over UP RR 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 September 2024.

How much traffic does I 70 Silt Spur over UP RR carry?

About 9,800 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is I 70 Silt Spur over UP RR?

The structure is 149 ft (45.4 m) long with a longest span of 67 ft (20.4 m) and a deck 31 ft wide.

Who owns I 70 Silt Spur over UP RR?

It is owned by the State Highway Agency.