US Bridges

Grasshopper Lkt RD over Squaw Creek

Poor

Humboldt County, California · 2 MI S/O Mattole RD · Structure no. 04P0018

Built
1983
42 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
1
2014 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Grasshopper Lkt RD over Squaw Creek is a steel stringer/multi-beam or girder carrying Grasshopper Lkt RD over Squaw 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1 vehicles a day, projected to reach 1 by 2041. The structure is 48 ft (14.6 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesGrasshopper Lkt RD
CrossesSquaw Creek
Location2 MI S/O Mattole RD
RouteState Lands Road 0
Coordinates40.32393, -124.00458
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, 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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span46 ft (14 m)
Deck width15 ft (4.7 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1 (2014)
Projected traffic1 by 2041
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$266,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Grasshopper Lkt RD over Squaw Creek built?

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

What condition is Grasshopper Lkt RD over Squaw Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Grasshopper Lkt RD over Squaw Creek carry?

About 1 vehicles per day (2014 count).

How long is Grasshopper Lkt RD over Squaw Creek?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14 m) and a deck 15 ft wide.

Who owns Grasshopper Lkt RD over Squaw Creek?

It is owned by the State Park, Forest, or Reservation Agency.