US Bridges

I 25 Ml over UP RR

Fair

Douglas County, Colorado · 8.4 MI S of Castle Rock · Structure no. H-17-CQ

Built
1980
45 years old, rebuilt 2021
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
64,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml over UP RR is a steel continuous stringer/multi-beam or girder carrying I 25 Ml over UP RR in Douglas County, Colorado. It was built in 1980 and reconstructed in 2021, so it is 45 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 64,000 vehicles a day, roughly 6% of them trucks, projected to reach 93,440 by 2040. The structure is 203 ft (62 m) long and 122 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Ml
CrossesUP RR
Location8.4 MI S of Castle Rock
RouteInterstate 25A
Coordinates39.24566, -104.88042
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 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 rating52.9 US tons
Inventory rating31.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length203 ft (62 m)
Longest span78 ft (23.8 m)
Deck width122 ft (37.3 m)
Roadway width118 ft (36 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,000 (2020)
Projected traffic93,440 by 2040
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 25 Ml over UP RR built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2021.

What condition is I 25 Ml 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 May 2023.

How much traffic does I 25 Ml over UP RR carry?

About 64,000 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is I 25 Ml over UP RR?

The structure is 203 ft (62 m) long with a longest span of 78 ft (23.8 m) and a deck 122 ft wide.

Who owns I 25 Ml over UP RR?

It is owned by the State Highway Agency.