US Bridges

County Road 1813 over Blue River

PoorPosted for load

Summit County, Colorado · 26 MI NW of Silverthorne · Structure no. ECA-BT-002

Built
1938
87 years old
Condition
Poor
inspected April 2024
Type
Arch - Deck
Steel
Length
173 ft
1 main span
Daily traffic
10
2015 count
Owner
Federal
Bureau of Reclamation

About this bridge

County Road 1813 over Blue River is a steel arch - deck carrying County Road 1813 over Blue River in Summit County, Colorado. It was built in 1938, so it is 87 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 10 by 2041. The structure is 173 ft (52.8 m) long and 24 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

Open in Google Maps
CarriesCounty Road 1813
CrossesBlue River
Location26 MI NW of Silverthorne
RouteFederal Lands Road 0
CountySummit County
StateColorado
Coordinates39.88018, -106.33414
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating40.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 20
Structure length173 ft (52.8 m)
Longest span121 ft (36.9 m)
Deck width24 ft (7.3 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2015)
Projected traffic10 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 1813 over Blue River built?

It was built in 1938, making it 87 years old in 2025.

What condition is County Road 1813 over Blue River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does County Road 1813 over Blue River carry?

About 10 vehicles per day (2015 count).

How long is County Road 1813 over Blue River?

The structure is 173 ft (52.8 m) long with a longest span of 121 ft (36.9 m) and a deck 24 ft wide.

Who owns County Road 1813 over Blue River?

It is owned by the Bureau of Reclamation.