Grand Coulee Dam Airport (3W7), Washington
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Grand Coulee Dam Airport (GCD), also identified as 3W7, is a public, non-towered field serving Electric City, Washington, at 1,593 feet elevation. It offers a single paved runway and operates without on-field attendance, so pilots coordinate arrivals over CTAF and handle any customs need through the nearest port at KMWH, roughly 44 nautical miles away. Traffic is light business aviation activity, consistent with a facility that supports regional and dam-area operations rather than sustained commercial or itinerant flow.
Runways
Grand Coulee Dam Airport has one paved runway, 04/22, 4,203 ft long and 75 ft wide, with an asphalt surface.
Source: FAA Form 5010.
Fuel and airfield services
The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Grand Coulee Dam Airport does not clear customs. The nearest port of entry is Grant County International (KMWH), 44 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Grand Coulee Dam Airport recorded 51 business aviation movements in 2025. Traffic peaks in November. Business aviation traffic at GCD is concentrated in November, which recorded 21 operations against single digits or none in most other months of 2025.
Business jet movements, FAA TFMSC count. Peak month November, 21 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Grand Coulee Dam Airport averages 14.0 days above 90°F in July and 27.8 freeze days in January. July is the warmest month, with average highs of 87.6°F, and January the coldest, at 32.7°F.
Weather station is 3.9 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Grand Coulee Dam Airport has published operating constraints in four categories: access, runway notes, environmental and other notes.
Runway edge and approach lighting, including REIL for runway 22, PAPI for runway 22, and MIRL for runway 04/22, is pilot-activated via CTAF.
A 15-foot tree stands 61 feet from the threshold, 73 feet left of centerline, and a ditch lies 27 feet from the threshold, 91 feet right of centerline.
Brush is located 79 feet right of centerline, with sloped terrain and brush 100 feet from the threshold, 99 feet left of centerline.
Geese and wildlife are present in the vicinity of the runway.
For clearance delivery, contact Seattle Air Route Traffic Control Center.
Source: FAA Chart Supplement.
Nearby airfields
Grand Coulee Dam Airport has five airfields within 44 NM. The closest is Anderson Field, 27.83 NM northwest.
Source: Skystar calculation from official coordinates.
Skystar at 3W7
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at 3W7.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What runway does GCD offer?
Grand Coulee Dam Airport (GCD) has one paved runway, 04/22, measuring 4,203 feet long and 75 feet wide with an asphalt surface. There is no parallel or crosswind runway option at this field. Pilots operating larger or performance-limited aircraft should plan around this single-strip constraint, particularly given the close-in obstructions noted near both thresholds.
Is fuel available at Grand Coulee Dam Airport?
Fuel type data is not published for Grand Coulee Dam Airport (GCD) in current records. The field is unattended, with no staffed FBO presence to confirm fuel service on-site. Operators should verify fuel availability directly before planning a stop, and consider Grant County International or Ephrata Municipal, both under 45 nautical miles away, as alternates.
How do I handle customs at GCD?
Grand Coulee Dam Airport (GCD) has no on-site customs service. The nearest customs-equipped airport is KMWH, located approximately 43.89 nautical miles away. Flights requiring customs clearance need to route through KMWH or another designated port rather than clearing directly at GCD, since this field has no facility or designation for international arrivals.
What obstructions affect approaches at GCD?
Grand Coulee Dam Airport (GCD) reports close-in obstructions on both ends of runway 04/22, including a 15-foot tree 61 feet from the threshold and a ditch 27 feet from the threshold on the opposite side, plus brush and sloped terrain near the other end. Geese and wildlife are also reported in the vicinity of the runway, adding another factor for approach and departure planning.