US Bridges

County Line Road over 108 Main Drain (sycamor)

Good

Colusa County, California · 4 MI East of HWY 5 · Structure no. 15C0207

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Culvert
Steel
Length
80 ft
3 main spans
Daily traffic
200
2017 count
Owner
County
County Highway Agency

About this bridge

County Line Road over 108 Main Drain (sycamor) is a steel culvert carrying County Line Road over 108 Main Drain (sycamor) in Colusa County, California. It was built in 2017, so it is 8 years old, younger than the California average of 54.8 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 250 by 2042. The structure is 80 ft (24.4 m) long. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCounty Line Road
Crosses108 Main Drain (sycamor)
Location4 MI East of HWY 5
RouteCounty Highway 0
CountyColusa County
StateCalifornia
Coordinates38.92521, -121.88875
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length80 ft (24.4 m)
Longest span11 ft (3.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2017)
Projected traffic250 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 Line Road over 108 Main Drain (sycamor) built?

It was built in 2017, making it 8 years old in 2025.

What condition is County Line Road over 108 Main Drain (sycamor) 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 October 2023.

How much traffic does County Line Road over 108 Main Drain (sycamor) carry?

About 200 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is County Line Road over 108 Main Drain (sycamor)?

The structure is 80 ft (24.4 m) long with a longest span of 11 ft (3.3 m).

Who owns County Line Road over 108 Main Drain (sycamor)?

It is owned by the County Highway Agency.