US Bridges

I 70 Ml Ebnd over Smith Gulch

Poor

Summit County, Colorado · I MI E of Summit Eagle Cl · Structure no. F-12-AM

Built
1977
48 years old
Condition
Poor
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
273 ft
2 main spans
Daily traffic
10,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 70 Ml Ebnd over Smith Gulch is a steel continuous box beam or girders - single or spread carrying I 70 Ml Ebnd over Smith Gulch in Summit County, Colorado. It was built in 1977, so it is 48 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 4 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.

It carries about 10,000 vehicles a day, roughly 14% of them trucks, projected to reach 12,100 by 2040. The structure is 273 ft (83.1 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 70 Ml Ebnd
CrossesSmith Gulch
LocationI MI E of Summit Eagle Cl
RouteInterstate 70A
Coordinates39.50732, -106.20337
Functional classRural Principal Arterial - Interstate

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length273 ft (83.1 m)
Longest span120 ft (36.6 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2020)
Projected traffic12,100 by 2040
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I 70 Ml Ebnd over Smith Gulch built?

It was built in 1977, making it 48 years old in 2025.

What condition is I 70 Ml Ebnd over Smith Gulch 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 August 2023.

How much traffic does I 70 Ml Ebnd over Smith Gulch carry?

About 10,000 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is I 70 Ml Ebnd over Smith Gulch?

The structure is 273 ft (83.1 m) long with a longest span of 120 ft (36.6 m) and a deck 42 ft wide.

Who owns I 70 Ml Ebnd over Smith Gulch?

It is owned by the State Highway Agency.