Grand Coulee Dam frequencies
Grand Coulee Dam (3W7) in Electric City, WA has no control tower, so nobody is sequencing traffic here — you announce your own position on 122.9. Every frequency below is in the order you tune it. · Open on the map
All of Grand Coulee Dam — runways, frequencies, charts and live weatherBefore taxi
- ASOS/AWOS 128.325
- An automated weather station reading the field conditions aloud — wind, visibility, ceiling, temperature and altimeter. It replaces ATIS at a field with no controller to record one. Get the altimeter setting before you descend below the transition altitude.
Taxi & takeoff
- CTAF 122.9
- The common frequency pilots use to announce themselves to each other at a field with no operating control tower. Nobody is controlling traffic — you are self announcing. Report your position and intentions on entry and on each leg of the pattern, and listen well before you transmit.
Also
- Flight service 126.1 (LOW)
- Flight Service handles briefings, flight plans and en route advisories, reached here through a remote outlet. Open and close VFR flight plans, and get updated weather in the air. 1-800-WX-BRIEF reaches the same specialists from the ground.
What to say on 122.9
Nobody is sequencing traffic at 3W7, so every call is you telling other aircraft where you are. Open and close with the field name so a pilot tuned to a shared frequency knows which airport you mean — 122.9 is not unique to Grand Coulee Dam.
- Inbound, 10 miles out
Grand Coulee Dam traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 04, Grand Coulee Dam.
- Entering the pattern
Grand Coulee Dam traffic, Skyhawk one two three four five, entering left downwind runway 04, Grand Coulee Dam.
- Before taking the runway
Grand Coulee Dam traffic, Skyhawk one two three four five, departing runway 04, Grand Coulee Dam.
Pattern direction is not always left here — check the 3W7 traffic pattern before you announce a leg. The Chart Supplement is authoritative if 3W7 publishes a call name that differs from the airport's. Full guidance →
By procedure & sector (1 more)
| 291.6 | MARLIN RCAG (LOW) |
|---|
Every 3W7 frequency, as one table
| ASOS/AWOS | 128.325 |
|---|---|
| CTAF | 122.9 |
| Flight service | 126.1 (LOW) |
Frequently asked
What is the CTAF at 3W7?
Grand Coulee Dam is non towered. The common traffic advisory frequency is 122.9 — announce your position and intentions on entry and on each leg of the pattern.
What is the ASOS/AWOS frequency at 3W7?
ASOS/AWOS at Grand Coulee Dam is 128.325. It is an automated broadcast, so there is no letter to report — just take the altimeter setting and wind.
More about 3W7
Frequencies from FAA NASR. For planning and education only; always verify against official sources.
Something here wrong or out of date? Report a data problem.