US Bridges

County Road 70 over I 25 Ml

Fair

Larimer County, Colorado · 12 MI North of JCT SH 14 · Structure no. A-17-V

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
247 ft
5 main spans
Daily traffic
5,160
2023 count
Owner
State
State Highway Agency

About this bridge

County Road 70 over I 25 Ml is a concrete continuous tee beam carrying County Road 70 over I 25 Ml in Larimer County, Colorado. It was built in 1967, so it is 58 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 5 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 5,160 vehicles a day, roughly 16% of them trucks, projected to reach 6,450 by 2042. The structure is 247 ft (75.3 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesCounty Road 70
CrossesI 25 Ml
Location12 MI North of JCT SH 14
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.75517, -104.99246
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckOther
Main spans5
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span57 ft (17.4 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,160 (2023)
Projected traffic6,450 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 70 over I 25 Ml built?

It was built in 1967, making it 58 years old in 2025.

What condition is County Road 70 over I 25 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 July 2023.

How much traffic does County Road 70 over I 25 Ml carry?

About 5,160 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is County Road 70 over I 25 Ml?

The structure is 247 ft (75.3 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.

Who owns County Road 70 over I 25 Ml?

It is owned by the State Highway Agency.