US Bridges

County Road 28 over Elkhead Res. Spillway

Fair

Moffat County, Colorado · 0.9 MI SE of Co.Rd. 29 · Structure no. MOF28-00.70-A

Built
2006
19 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
101
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 28 over Elkhead Res. Spillway is a prestressed concrete stringer/multi-beam or girder carrying County Road 28 over Elkhead Res. Spillway in Moffat County, Colorado. It was built in 2006, so it is 19 years old, younger 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 101 vehicles a day, roughly 36% of them trucks, projected to reach 118 by 2042. The structure is 81 ft (24.8 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty Road 28
CrossesElkhead Res. Spillway
Location0.9 MI SE of Co.Rd. 29
RouteCounty Highway 0
CountyMoffat County
StateColorado
Coordinates40.5571, -107.38156
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating67.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length81 ft (24.8 m)
Longest span76 ft (23.3 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101 (2023)
Projected traffic118 by 2042
Trucks36%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 28 over Elkhead Res. Spillway built?

It was built in 2006, making it 19 years old in 2025.

What condition is County Road 28 over Elkhead Res. Spillway 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 October 2023.

How much traffic does County Road 28 over Elkhead Res. Spillway carry?

About 101 vehicles per day (2023 count), of which roughly 36% are trucks.

How long is County Road 28 over Elkhead Res. Spillway?

The structure is 81 ft (24.8 m) long with a longest span of 76 ft (23.3 m) and a deck 31 ft wide.

Who owns County Road 28 over Elkhead Res. Spillway?

It is owned by the County Highway Agency.