US Bridges

I 76 Ml Ebnd over Ramp to SH 121 Ml

Poor

Jefferson County, Colorado · I70 I76 SH121 Interchan · Structure no. E-16-JV

Built
1982
43 years old
Condition
Poor
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Steel
Length
173 ft
1 main span
Daily traffic
38,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 76 Ml Ebnd over Ramp to SH 121 Ml is a steel box beam or girders - single or spread carrying I 76 Ml Ebnd over Ramp to SH 121 Ml in Jefferson County, Colorado. It was built in 1982, so it is 43 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 3 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 38,000 vehicles a day, roughly 11% of them trucks, projected to reach 50,160 by 2040. The structure is 173 ft (52.7 m) long and 85 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 76 Ml Ebnd
CrossesRamp to SH 121 Ml
LocationI70 I76 SH121 Interchan
RouteInterstate 76A
Coordinates39.78685, -105.07213
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating47.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length173 ft (52.7 m)
Longest span168 ft (51.2 m)
Deck width85 ft (26 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,000 (2020)
Projected traffic50,160 by 2040
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 76 Ml Ebnd over Ramp to SH 121 Ml built?

It was built in 1982, making it 43 years old in 2025.

What condition is I 76 Ml Ebnd over Ramp to SH 121 Ml 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 January 2025.

How much traffic does I 76 Ml Ebnd over Ramp to SH 121 Ml carry?

About 38,000 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is I 76 Ml Ebnd over Ramp to SH 121 Ml?

The structure is 173 ft (52.7 m) long with a longest span of 168 ft (51.2 m) and a deck 85 ft wide.

Who owns I 76 Ml Ebnd over Ramp to SH 121 Ml?

It is owned by the State Highway Agency.