Grand Coulee Dam Airport
3W7 · GCD · Electric City, WA · 1,588 ft elevation · var 15E · Non-towered
Airport information
- FAA LID
- 3W7 / GCD
- Coordinates
- 47.9220, -119.0830
- Elevation
- 1,588 ft MSL
- Magnetic variation
- 15E
- Sectional chart
- SEATTLE
- Airport use
- Public
- Control tower
- No
- Weather station
- AWOS-3PT · 128.325 · ☎ 509-631-8955
- ARTCC
- SEATTLE (ZSE)
- Flight service (FSS)
- SEATTLE
- NOTAM facility
- SEA
- Attendance
- UNATNDD
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1972/10
- Distance from city
- 2 SW
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (PDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:16 AM | 11:16Z |
| Sunrise | 04:57 AM | 11:57Z |
| Sunset | 08:59 PM | 03:59Z |
| Evening civil twilight Loggable night begins | 09:40 PM | 04:40Z |
Plan a flight from 3W7
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT REIL RWY 22; PAPI RWY 22; MIRL RWY 04/22 - CTAF. on 122.9 — Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 03 · 036°
- Pattern
- left (turns left)
- TPA
- 2,600 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 03 at 2,600 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 03/21
4,199 ft × 75 ft · ASP- Heading
- 036° mag · 51° true
- Heading
- 216° mag · 231° true
| Runway | Length | Your margin |
|---|---|---|
| 03/21 | 4,199 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 | ACTVT REIL RWY 22; PAPI RWY 22; MIRL RWY 04/22 - CTAF. |
| 3W7 AWOS-3PT | 128.325 | |
| MARLIN RCAG | 126.1 | APCH/DEP SVC PRVDD BY SEATTLE ARTCC (ZSE) ON FREQS 126.1/291.6 (MARLIN RCAG). |
| MARLIN RCAG | 291.6 | APCH/DEP SVC PRVDD BY SEATTLE ARTCC (ZSE) ON FREQS 126.1/291.6 (MARLIN RCAG). |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| EPH · Ephrata | VORTAC | 112.60 | r002° / 35.5 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management
Remarks FAA
- GEESE & WILDLIFE INVOF RWY.
- FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
- ACTVT REIL RWY 22; PAPI RWY 22; MIRL RWY 04/22 - CTAF.
- PILOTS BRING OWN ROPES.
- 15 FT TREE 61 FT FM THR, 73 FT LEFT & DITCH 27 FT FM THR, 91 FT RIGHT.
- BRUSH 79 FT RIGHT; SLP & BRUSH 100 FT FM THR, 99 FT LEFT.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 3W7 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 3W7
Grand Coulee Dam Airport (3W7 · GCD) is an airport in Electric City, WA, at 1,588 ft MSL. It has 1 runway, the longest 4,199 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 3W7, refreshed from the Aviation Weather Center and FAA NASR.
Does 3W7 have a control tower?
No. Grand Coulee Dam Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 3W7?
Grand Coulee Dam Airport has 1 runway; the longest is 4,199 ft. See the Runways tab for headings, surface, and lighting.
Where is 3W7?
Grand Coulee Dam Airport is in Electric City, WA, at an elevation of 1,588 ft MSL. Coordinates: 47.9220, -119.0830.
Fly out of 3W7 often?
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