US Bridges

SH 115 Ml over Arkansas River

Fair

Fremont County, Colorado · 0.4 MI N of JCT SH 120 · Structure no. K-16-V

Built
1951
74 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
243 ft
3 main spans
Daily traffic
4,500
2020 count
Owner
State
State Highway Agency

About this bridge

SH 115 Ml over Arkansas River is a steel continuous stringer/multi-beam or girder carrying SH 115 Ml over Arkansas River in Fremont County, Colorado. It was built in 1951, so it is 74 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 4,500 vehicles a day, roughly 7% of them trucks, projected to reach 4,860 by 2040. The structure is 243 ft (74 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSH 115 Ml
CrossesArkansas River
Location0.4 MI N of JCT SH 120
RouteState Highway 115A
CountyFremont County
StateColorado
Coordinates38.39, -105.06907
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating45.4 US tons
Inventory rating27.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length243 ft (74 m)
Longest span90 ft (27.5 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2020)
Projected traffic4,860 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 115 Ml over Arkansas River built?

It was built in 1951, making it 74 years old in 2025.

What condition is SH 115 Ml over Arkansas 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 August 2024.

How much traffic does SH 115 Ml over Arkansas River carry?

About 4,500 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SH 115 Ml over Arkansas River?

The structure is 243 ft (74 m) long with a longest span of 90 ft (27.5 m) and a deck 28 ft wide.

Who owns SH 115 Ml over Arkansas River?

It is owned by the State Highway Agency.