US Bridges

County Road 77 over Tarryall Creek

Good

Park County, Colorado · At Tarryall Res Outlet · Structure no. PA77-S10.6S285A

Built
2011
14 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
170
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 77 over Tarryall Creek is a prestressed concrete stringer/multi-beam or girder carrying County Road 77 over Tarryall Creek in Park County, Colorado. It was built in 2011, so it is 14 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 170 vehicles a day, roughly 2% of them trucks, projected to reach 228 by 2040. The structure is 92 ft (28 m) long and 31 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

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CarriesCounty Road 77
CrossesTarryall Creek
LocationAt Tarryall Res Outlet
RouteCounty Highway 0
CountyPark County
StateColorado
Coordinates39.22185, -105.60244
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length92 ft (28 m)
Longest span82 ft (25.1 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2020)
Projected traffic228 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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 77 over Tarryall Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is County Road 77 over Tarryall Creek 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 April 2023.

How much traffic does County Road 77 over Tarryall Creek carry?

About 170 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is County Road 77 over Tarryall Creek?

The structure is 92 ft (28 m) long with a longest span of 82 ft (25.1 m) and a deck 31 ft wide.

Who owns County Road 77 over Tarryall Creek?

It is owned by the County Highway Agency.