US Bridges

Ishi Pishi RD over Ranger Flat Draw

Fair

Humboldt County, California · 0.3 MI N JCT SR 96 · Structure no. 04C0181

Built
1950
75 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
122
2011 count
Owner
County
County Highway Agency

About this bridge

Ishi Pishi RD over Ranger Flat Draw is a steel stringer/multi-beam or girder carrying Ishi Pishi RD over Ranger Flat Draw in Humboldt 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 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 122 vehicles a day, roughly 1% of them trucks, projected to reach 153 by 2041. The structure is 52 ft (15.8 m) long and 14 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesIshi Pishi RD
CrossesRanger Flat Draw
Location0.3 MI N JCT SR 96
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates41.30503, -123.53437
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width14 ft (4.4 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122 (2011)
Projected traffic153 by 2041
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Ishi Pishi RD over Ranger Flat Draw built?

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

What condition is Ishi Pishi RD over Ranger Flat Draw 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 2023.

How much traffic does Ishi Pishi RD over Ranger Flat Draw carry?

About 122 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Ishi Pishi RD over Ranger Flat Draw?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 14 ft wide.

Who owns Ishi Pishi RD over Ranger Flat Draw?

It is owned by the County Highway Agency.