US Bridges

Myrtle Ave over Freshwater Creek

Good

Humboldt County, California · 4.6 MI E/O SR 101 · Structure no. 04C0177

Built
1983
42 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
7,009
2011 count
Owner
County
County Highway Agency

About this bridge

Myrtle Ave over Freshwater Creek is a concrete continuous slab carrying Myrtle Ave over Freshwater Creek in Humboldt County, California. It was built in 1983, so it is 42 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 7,009 vehicles a day, roughly 2% of them trucks, projected to reach 7,389 by 2045. The structure is 121 ft (36.9 m) long and 40 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesMyrtle Ave
CrossesFreshwater Creek
Location4.6 MI E/O SR 101
RouteCounty Highway 0
Coordinates40.78443, -124.08577
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating36.4 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span40 ft (12.2 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,009 (2011)
Projected traffic7,389 by 2045
Trucks2%
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 Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Myrtle Ave over Freshwater Creek 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 2023.

How much traffic does Myrtle Ave over Freshwater Creek carry?

About 7,009 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Myrtle Ave over Freshwater Creek?

The structure is 121 ft (36.9 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns Myrtle Ave over Freshwater Creek?

It is owned by the County Highway Agency.