US Bridges

SH 9 Ml over Mack Gulch

Good

Fremont County, Colorado · 16 MI N of US50 · Structure no. J-15-GA

Built
2022
3 years old
Condition
Good
inspected March 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
37 ft
2 main spans
Daily traffic
1,200
2020 count
Owner
State
State Highway Agency

About this bridge

SH 9 Ml over Mack Gulch is a aluminum, wrought iron, or cast iron culvert carrying SH 9 Ml over Mack Gulch in Fremont County, Colorado. It was built in 2022, so it is 3 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,200 vehicles a day, roughly 7% of them trucks, projected to reach 1,680 by 2040. The structure is 37 ft (11.3 m) long and 58 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSH 9 Ml
CrossesMack Gulch
Location16 MI N of US50
RouteState Highway 9A
Coordinates38.67003, -105.48482
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans2
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span16 ft (4.9 m)
Deck width58 ft (17.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2020)
Projected traffic1,680 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 9 Ml over Mack Gulch built?

It was built in 2022, making it 3 years old in 2025.

What condition is SH 9 Ml over Mack Gulch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does SH 9 Ml over Mack Gulch carry?

About 1,200 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SH 9 Ml over Mack Gulch?

The structure is 37 ft (11.3 m) long with a longest span of 16 ft (4.9 m) and a deck 58 ft wide.

Who owns SH 9 Ml over Mack Gulch?

It is owned by the State Highway Agency.