US Bridges

I 25 Nbnd over ST Charles River

Fair

Pueblo County, Colorado · 10.1 Miles N of Exit 77/A · Structure no. L-18-T

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
175 ft
3 main spans
Daily traffic
7,500
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Nbnd over ST Charles River is a concrete tee beam carrying I 25 Nbnd over ST Charles River in Pueblo County, Colorado. It was built in 1963, so it is 62 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 7,500 vehicles a day, roughly 14% of them trucks, projected to reach 9,450 by 2040. The structure is 175 ft (53.3 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Nbnd
CrossesST Charles River
Location10.1 Miles N of Exit 77/A
RouteInterstate 25A
Coordinates38.12075, -104.67098
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length175 ft (53.3 m)
Longest span57 ft (17.4 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2020)
Projected traffic9,450 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$321,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 25 Nbnd over ST Charles River built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 25 Nbnd over ST Charles River 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 April 2024.

How much traffic does I 25 Nbnd over ST Charles River carry?

About 7,500 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is I 25 Nbnd over ST Charles River?

The structure is 175 ft (53.3 m) long with a longest span of 57 ft (17.4 m) and a deck 34 ft wide.

Who owns I 25 Nbnd over ST Charles River?

It is owned by the State Highway Agency.