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WA41Seaplane Base

LAKE SAWYER DOUBLE E

BLACK DIAMOND, Washington

Private usePrivate520 ft MSL

Seaplane Base Information

Facility Type

SEAPLANE BASE

Elevation

520 ft MSL

Ownership

Private

Use

Private use

Coordinates

47.3333, -122.0333

County

KING

Water Lanes

IDLengthWidthSurface
15W/33W6,055 ft300 ftWATER

Floatplane intelligence for WA41

Live weather, decoded NOTAMs, AI briefings. Included in every AeroCopilot plan from $7.99/month.

Source: FAA NASR (seaplane base facility, water lanes, frequencies). Updated 2026-05-12 15:48 UTC.