US Bridges

Myrtle Ave over Freshwater CR Overflow

Good

Humboldt County, California · 0.4 MI W of Kneeland RD · Structure no. 04C0238

Built
1984
41 years old
Condition
Good
inspected June 2021
Type
Slab
Concrete Continuous
Length
203 ft
10 main spans
Daily traffic
6,908
2011 count
Owner
County
County Highway Agency

About this bridge

Myrtle Ave over Freshwater CR Overflow is a concrete continuous slab carrying Myrtle Ave over Freshwater CR Overflow in Humboldt County, California. It was built in 1984, so it is 41 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 6,908 vehicles a day, roughly 5% of them trucks, projected to reach 7,588 by 2043. The structure is 203 ft (61.9 m) long and 40 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesMyrtle Ave
CrossesFreshwater CR Overflow
Location0.4 MI W of Kneeland RD
RouteCounty Highway 0
Coordinates40.7836, -124.09187
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 inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadUnknown
Structure length203 ft (61.9 m)
Longest span20 ft (6.1 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,908 (2011)
Projected traffic7,588 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Myrtle Ave over Freshwater CR Overflow built?

It was built in 1984, making it 41 years old in 2025.

What condition is Myrtle Ave over Freshwater CR Overflow 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 June 2021.

How much traffic does Myrtle Ave over Freshwater CR Overflow carry?

About 6,908 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Myrtle Ave over Freshwater CR Overflow?

The structure is 203 ft (61.9 m) long with a longest span of 20 ft (6.1 m) and a deck 40 ft wide.

Who owns Myrtle Ave over Freshwater CR Overflow?

It is owned by the County Highway Agency.