US Bridges

Park Entrance Road over Lake Sylvia

Fair

Grays Harbor County, Washington · Lake Sylvia State Park · Structure no. 086471000000000

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
216 ft
6 main spans
Daily traffic
1,000
2012 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Park Entrance Road over Lake Sylvia is a wood or timber stringer/multi-beam or girder carrying Park Entrance Road over Lake Sylvia in Grays Harbor County, Washington. It was built in 1976, so it is 49 years old, younger than the Washington average of 49.8 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 1,000 vehicles a day, projected to reach 1,072 by 2036. The structure is 216 ft (65.8 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesPark Entrance Road
CrossesLake Sylvia
LocationLake Sylvia State Park
RouteState Lands Road 45000
CountyGrays Harbor County
StateWashington
Coordinates46.99632, -123.59374
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionJuly 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadHS 15
Structure length216 ft (65.8 m)
Longest span36 ft (11 m)
Deck width28 ft (8.4 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2012)
Projected traffic1,072 by 2036
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Park Entrance Road over Lake Sylvia built?

It was built in 1976, making it 49 years old in 2025.

What condition is Park Entrance Road over Lake Sylvia 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 July 2024.

How much traffic does Park Entrance Road over Lake Sylvia carry?

About 1,000 vehicles per day (2012 count).

How long is Park Entrance Road over Lake Sylvia?

The structure is 216 ft (65.8 m) long with a longest span of 36 ft (11 m) and a deck 28 ft wide.

Who owns Park Entrance Road over Lake Sylvia?

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