US Bridges

US 34 Ml over SH 39 Ml

Fair

Morgan County, Colorado · 4.6 MI E of JCT SH 144 · Structure no. D-20-AP

Built
1982
43 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
175 ft
3 main spans
Daily traffic
4,500
2020 count
Owner
State
State Highway Agency

About this bridge

US 34 Ml over SH 39 Ml is a steel continuous stringer/multi-beam or girder carrying US 34 Ml over SH 39 Ml in Morgan 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 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 4,500 vehicles a day, roughly 15% of them trucks, projected to reach 6,210 by 2040. The structure is 175 ft (53.3 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 34 Ml
CrossesSH 39 Ml
Location4.6 MI E of JCT SH 144
RouteU.S. Route 34A
Coordinates40.24757, -104.05609
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.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length175 ft (53.3 m)
Longest span94 ft (28.5 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2020)
Projected traffic6,210 by 2040
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 US 34 Ml over SH 39 Ml built?

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

What condition is US 34 Ml over SH 39 Ml 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 January 2024.

How much traffic does US 34 Ml over SH 39 Ml carry?

About 4,500 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is US 34 Ml over SH 39 Ml?

The structure is 175 ft (53.3 m) long with a longest span of 94 ft (28.5 m) and a deck 47 ft wide.

Who owns US 34 Ml over SH 39 Ml?

It is owned by the State Highway Agency.