US Bridges

Sites-Lodoga RD over Grapevine Creek

Fair

Colusa County, California · 14.6 MI W/O 1-5 · Structure no. 15C0070

Built
1971
54 years old
Condition
Fair
inspected October 2024
Type
Arch - Deck
Steel
Length
28 ft
1 main span
Daily traffic
285
2014 count
Owner
County
County Highway Agency

About this bridge

Sites-Lodoga RD over Grapevine Creek is a steel arch - deck carrying Sites-Lodoga RD over Grapevine Creek in Colusa County, California. It was built in 1971, so it is 54 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 285 vehicles a day, roughly 2% of them trucks, projected to reach 1,065 by 2046. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 47.8 mi (77 km).

CarriesSites-Lodoga RD
CrossesGrapevine Creek
Location14.6 MI W/O 1-5
RouteCounty Highway 0
Coordinates39.35434, -122.40056
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span26 ft (8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic285 (2014)
Projected traffic1,065 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 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 Sites-Lodoga RD over Grapevine Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Sites-Lodoga RD over Grapevine Creek 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 2024.

How much traffic does Sites-Lodoga RD over Grapevine Creek carry?

About 285 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Sites-Lodoga RD over Grapevine Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (8 m).

Who owns Sites-Lodoga RD over Grapevine Creek?

It is owned by the County Highway Agency.