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WA41 Lake Sawyer Double E Seaplane Base
Black Diamond, Washington, USA

GOING TO BLACK DIAMOND?

FAA INFORMATION EFFECTIVE 19 MARCH 2026

Location

FAA Identifier: WA41
Lat/Long: 47-20-00.0000N 122-02-00.0000W
47-20.000000N 122-02.000000W
47.3333333,-122.0333333
(estimated)
Elevation: 520 ft. / 158 m (estimated)
From city: 3 miles NNW of BLACK DIAMOND, WA
Time zone: UTC -7 (UTC -8 during Standard Time)
Zip code: 98010

Seaplane Base Operations

Seaplane Base use: Private use. Permission required prior to landing
Activation date: 11/2018
Control tower: no
ARTCC: SEATTLE CENTER
FSS: SEATTLE FLIGHT SERVICE STATION
Attendance: 
Segmented circle: no

Seaplane Base Communications

WX ASOS at RNT (12 nm NW): 126.95 (425-255-6080)
WX ASOS at SEA (13 nm NW): PHONE 206-214-2592
WX ASOS at BFI (16 nm NW): PHONE 206-658-6435
WX AWOS-3 at PLU (17 nm SW): 128.575 (253-848-2748)

Nearby radio navigation aids

VOR radial/distance  VOR name  Freq  Var
SEAr100/12.8SEATTLE VORTAC116.8019E
PAEr144/36.6PAINE VOR/DME110.6020E

Seaplane Base Services

Runway Information

Runway 15W/33W

Dimensions: 6055 x 300 ft. / 1846 x 91 m
Surface: water, in fair condition
RUNWAY 15W  RUNWAY 33W
Traffic pattern: rightright

Seaplane Base Ownership and Management from official FAA records

Ownership: Privately-owned
Owner: ERIC EKNES
29810 224TH AVE SE
BLACK DIAMOND, WA 98010
Phone 206-618-2308
Manager: ERIC EKNES
29810 224TH AVE SE
BLACK DIAMOND, WA 98010
Phone 206-618-2308

Instrument Procedures

There are no published instrument procedures at WA41.

Some nearby airports with instrument procedures:

S50 - Auburn Municipal Airport (8 nm W)
KRNT - Renton Municipal Airport (12 nm NW)
KSEA - Seattle-Tacoma International Airport (13 nm NW)
KBFI - Boeing Field/King County International Airport (16 nm NW)
KPLU - Pierce County Airport/Thun Field (17 nm SW)
  
Loc | Ops | Rwys | IFR | FBO | Links
Com | Nav | Svcs | Stats | Notes
Aerial photo
No photo
 
Sectional chart

 
Airport distance calculator
Flying to Lake Sawyer Double E Seaplane Base? Find the distance to fly.

From to WA41

Sunrise and sunset
Times for 23-Mar-2026
 Local
(UTC-7)		 Zulu
(UTC)
Morning civil twilight06:3513:35
Sunrise07:0614:06
Sunset19:2402:24
Evening civil twilight19:5402:54

Current date and time
Zulu (UTC)  23-Mar-2026 22:42:11
Local (UTC-7)  23-Mar-2026 15:42:11
 
METAR
KRNT 
12nm NW 		232153Z 32008KT 10SM CLR 10/01 A3009 RMK AO2 SLP195 T01000011
KSEA 
13nm NW 		232153Z 33005KT 10SM BKN120 BKN200 10/01 A3009 RMK AO2 SLP198 T01000006 $
KPLU 
17nm SW 		232215Z AUTO 00000KT 10SM CLR 10/02 A3008 RMK AO2
KBFI 
17nm NW 		232153Z 29006KT 10SM CLR 10/01 A3010 RMK AO2 SLP191 T01000011
KTCM 
22nm SW 		232155Z AUTO 07004KT 10SM BKN130 BKN160 10/02 A3008 RMK AO2 SLP192 T01010017 $
KTIW 
23nm W 		232153Z 03005KT 10SM CLR 09/00 A3010 RMK AO2 SLP194 T00890000
TAF
KSEA 
13nm NW 		232057Z 2321/2424 03005KT P6SM BKN150 FM240300 01004KT P6SM BKN150 FM241000 13004KT P6SM VCSH OVC060 FM241500 17005KT P6SM -RA OVC030 FM241900 20012G25KT P6SM -SHRA OVC025
KBFI 
17nm NW 		231729Z 2318/2418 VRB03KT P6SM BKN250 FM232000 32004KT P6SM BKN200 FM240300 VRB03KT P6SM BKN150 FM241000 14002KT P6SM OVC050 FM241500 15005KT P6SM -RA OVC035
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