US Bridges

I 25 Nbnd over Sull Creek

Fair

Huerfano County, Colorado · 1.7 Miles North of SH10/W · Structure no. N-17-BG

Built
1963
62 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
185 ft
3 main spans
Daily traffic
4,650
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Nbnd over Sull Creek is a steel continuous stringer/multi-beam or girder carrying I 25 Nbnd over Sull Creek in Huerfano 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 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 4,650 vehicles a day, roughly 17% of them trucks, projected to reach 6,603 by 2040. The structure is 185 ft (56.4 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 25 Nbnd
CrossesSull Creek
Location1.7 Miles North of SH10/W
RouteInterstate 25A
CountyHuerfano County
StateColorado
Coordinates37.65058, -104.78582
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.1 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span69 ft (21 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,650 (2020)
Projected traffic6,603 by 2040
Trucks17%
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 proposedNone recorded
Estimated improvement cost$340,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 25 Nbnd over Sull Creek built?

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

What condition is I 25 Nbnd over Sull Creek 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 Nbnd over Sull Creek carry?

About 4,650 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is I 25 Nbnd over Sull Creek?

The structure is 185 ft (56.4 m) long with a longest span of 69 ft (21 m) and a deck 34 ft wide.

Who owns I 25 Nbnd over Sull Creek?

It is owned by the State Highway Agency.