US Bridges

Westside RD over North Branch Carman Crk

Poor

Sierra County, California · 6.1 MI N SR 89 & 49 · Structure no. 13C0038

Built
1950
75 years old
Condition
Poor
inspected August 2023
Type
Culvert
Steel
Length
61 ft
7 main spans
Daily traffic
670
1999 count
Owner
County
County Highway Agency

About this bridge

Westside RD over North Branch Carman Crk is a steel culvert carrying Westside RD over North Branch Carman Crk in Sierra County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 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.

It carries about 670 vehicles a day, roughly 3% of them trucks, projected to reach 1,073 by 2041. The structure is 61 ft (18.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWestside RD
CrossesNorth Branch Carman Crk
Location6.1 MI N SR 89 & 49
RouteCounty Highway 0
CountySierra County
StateCalifornia
Coordinates39.6951, -120.4089
Functional classRural Major Collector

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans7
Design loadUnknown
Structure length61 ft (18.6 m)
Longest span9 ft (2.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (1999)
Projected traffic1,073 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$249,000 (2018 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Westside RD over North Branch Carman Crk built?

It was built in 1950, making it 75 years old in 2025.

What condition is Westside RD over North Branch Carman Crk 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 August 2023.

How much traffic does Westside RD over North Branch Carman Crk carry?

About 670 vehicles per day (1999 count), of which roughly 3% are trucks.

How long is Westside RD over North Branch Carman Crk?

The structure is 61 ft (18.6 m) long with a longest span of 9 ft (2.8 m).

Who owns Westside RD over North Branch Carman Crk?

It is owned by the County Highway Agency.