US Bridges

I 25 Ml Nbnd over Porter Draw

Fair

Pueblo County, Colorado · 10.3 MI S of El Paso-Pueb · Structure no. K-18-CH

Built
1958
67 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
154 ft
3 main spans
Daily traffic
17,500
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml Nbnd over Porter Draw is a concrete tee beam carrying I 25 Ml Nbnd over Porter Draw in Pueblo County, Colorado. It was built in 1958, so it is 67 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 17,500 vehicles a day, roughly 10% of them trucks, projected to reach 23,450 by 2040. The structure is 154 ft (46.9 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Ml Nbnd
CrossesPorter Draw
Location10.3 MI S of El Paso-Pueb
RouteInterstate 25A
Coordinates38.37494, -104.61956
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating39.4 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span49 ft (15 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2020)
Projected traffic23,450 by 2040
Trucks10%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 25 Ml Nbnd over Porter Draw built?

It was built in 1958, making it 67 years old in 2025.

What condition is I 25 Ml Nbnd over Porter Draw 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 2024.

How much traffic does I 25 Ml Nbnd over Porter Draw carry?

About 17,500 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is I 25 Ml Nbnd over Porter Draw?

The structure is 154 ft (46.9 m) long with a longest span of 49 ft (15 m) and a deck 34 ft wide.

Who owns I 25 Ml Nbnd over Porter Draw?

It is owned by the State Highway Agency.