Lower Monumental Dam Heliport

Location

Latitude:	46-33-42.9400N (46.561928)
Longitude:	118-32-45.4200W (-118.54595)
Elevation:	465.0 feet MSL (142 m MSL)
Magnetic Variation:	14 E (as of December 2025 from WMM2020 model)
Time Zone:	UTC -8.0 (Standard Time) UTC -7.0 (Daylight Savings Time)
From City:	00 N.M. N of Kahlotus, Washington
Found On:	Seattle Chart
FAA Region:	ANM

Contacts

Manager:	Publicly owned:
ROBERT WITHAM LOWER MONUMENTAL LOCK AND DAM, 5520 DEVILS CANYON ROAD KAHLOTUS, WA 99335 509-282-3219	U.S. ARMY CORPS OF ENGINEERS RR 6, BOX 693 PASCO, WA 99301 509-282-3218

Operations

Airport Status:	Operational
Facility Use:	Private
Type:	Heliport
Activation Date:	09/1987
Control tower:	No
Attendance (Months/Days/Hours):	Months/Days/Hours Unattended
Boundary ARTCC:	ZSE (Seattle)
Responsible ARTCC:	ZSE (Seattle)
Segmented Circle Indicator:	Yes
Traffic Pattern Altitude (MSL):	1465 feet (447 m)
NOTAM-D Service:	No

Based Aircraft

Annual Operations (as of )

Communications

Fixed Based Operators (FBOs) & Fuel

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Area Code: 509

Business Name	Frequency	Phone	Fuel Grade

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Flight Service Stations

	Primary	Alternate
FSS on Field:	N
FSS Name (ID):	Seattle(SEA)
Frequency:
Toll Free Phone:	1-800-WX-BRIEF

Instrument Procedures / Charts

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Navigation Aids (Navaids) near WN84

Dist (NM)	ID	Morse Code	Name	Type	Freq	True Hdg	Mag Hdg
27.3	AL	. _ . _ . .	Trina	NDB	353	147	133
29.4	PSC	. _ _ . . . . _ . _ .	Pasco	VOR-DME	113.75	233	219
30.4	ALW	. _ . _ . . . _ _	Walla Walla	VOR-DME	116.40	159	145
44.7	MW	_ _ . _ _	Pelly	NDB	408	318	304
50.2	MWH	_ _ . _ _ . . . .	Moses Lake	VOR-DME	115.00	321	307
52.5	PD	. _ _ . _ . .	Foris	NDB	230	188	174
54.3	PDT	. _ _ . _ . . _	Pendleton	VORTAC	114.70	197	183
54.9	PUW	. _ _ . . . _ . _ _	Pullman	VOR-DME	117.15	82	68
60.7	EPH	. . _ _ . . . . .	Ephrata	VORTAC	112.60	324	310
70.1	MQG	_ _ _ _ . _ _ _ .	Nez Perce	VOR-DME	114.45	98	84
70.9	GEG	_ _ . . _ _ .	Spokane	VORTAC	115.50	31	17
72.5	SKA	. . . _ . _ . _	Fairchild	TACAN	111.40	29	15
75.4	YK	_ . _ _ _ . _	Donny	NDB	371	269	255
75.6	GEG	_ _ . . _ _ .	Spokane Intl	VOT	109.60	33	19
77.1	LGD	. _ . . _ _ . _ . .	La Grande	NDB	296	161	147
78.3	YKM	_ . _ _ _ . _ _ _	Yakima	VORTAC	116.00	271	257
80.5	CRK	_ . _ . . _ . _ . _	Canyon	NDB	388	33	19
83.3	ELN	. . _ . . _ .	Ellensburg	VOR-DME	117.90	290	276
83.7	SFF	. . . . . _ . . . _ .	Spokane/Felts Field	VOT	114.00	36	22
84.7	EAT	. . _ _	Wenatchee	VOR-DME	111.00	307	293

Navigational Aid (NAVAID) distances from the airport are listed in Nautical Miles (NM).

Nearby Airports with Fuel

Dist (NM)	Name (Airport IDs)	True Hdg	Mag Hdg	Fuel Grade
26.0	Othello Municipal Airport (S70)	302	288	100LL
29.7	Tri-Cities Airport (PSC KPSC PSC)	233	219	100LL, Jet A-1+
30.2	Walla Walla Regional Airport (ALW KALW ALW)	158	144	100LL, Jet A
31.4	Martin Field Airport (S95)	170	156	100LL
34.9	Richland Airport (RLD KRLD RLD)	244	230	100LL, Jet A
49.9	Port Of Whitman Business Air Center Airport (S94)	68	54	100LL
50.1	Grant County International Airport (MWH KMWH MWH)	321	307	100LL, Jet A, Jet A-1+
53.1	Hermiston Municipal Airport (HES KHRI HRI)	214	200	100LL, Jet A+
53.5	Eastern Oregon Regional At Pendleton Airport (PDT KPDT PDT)	193	179	100LL, Jet A-1+, MOGAS
55.8	Prosser Airport (S40)	248	234	100LL
59.9	Ephrata Municipal Airport (EPH KEPH EPH)	318	304	100LL, Jet A, Jet A+
60.0	Pullman/Moscow Regional Airport (PUW KPUW PUW)	79	65	100LL, Jet A
60.6	Sunnyside Municipal Airport (1S5)	257	243	100LL
61.4	Rosalia Municipal Airport (72S)	48	34	100LL
64.2	West Buttercreek Airport (OL02)	213	199	100LL, Jet A
64.2	Lewiston/Nez Perce County Airport (LWS KLWS LWS)	99	86	100, 100LL, Jet A
67.2	Davenport Airport (68S)	12	358	100LL
71.9	Wilbur Airport (2S8)	353	339	100LL, Jet A
73.7	Willard Field Airport (73S)	56	42	100LL
75.7	Spokane International Airport (GEG KGEG GEG)	32	18	100, 100LL, Jet A

Notices to Airmen (NOTAMS)

NOTAMs

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NM of WN84

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Remarks

A110-1

FOR CD CTC CHINOOK APCH AT 509-542-4209, WHEN APCH CLSD CTC SEATTLE ARTCC AT 253-351-3694.

Runways

Runway Summary

Runways:	H1
Longest Runway:	H1 is 200 ft (61 m) long
Runways with an Instrument Approach:

WN84 Airport Runway Details

Helipad H1	200 ft x 200 ft (61 m x 61 m)
Surface:	Asphalt - No special surface treatment

	Helipad H1
Elevation:	465.0
Latitude:	46-33-42.9400N
Longitude:	118-32-45.4200W
Glide Path Angle:	0.0 degrees	0.0 degrees

Services

Airframe Repair:	Major
Powerplant Repair:	Major
Bottled Oxygen:	High Pressure / Low Pressure
Bulk Oxygen:	High Pressure / Low Pressure
Fuel Available:	100, 100LL, Jet A
Landing Fees:	No
Parking:	Hangars and tiedowns available

FAA: WN84

Location

Contacts

Operations

Based Aircraft

Annual Operations (as of )

Communications

Fixed Based Operators (FBOs) & Fuel

Area Code: 509

Flight Service Stations

Instrument Procedures / Charts

Navigation Aids (Navaids) near WN84

Nearby Airports with Fuel

Notices to Airmen (NOTAMS)

NOTAMs

NOTAM Radius Search

NOTAM Flight Path Search (Enter from two to five locations below)

Remarks

Runways

Runway Summary

WN84 Airport Runway Details

Helipad H1

Services

Ratings and Reviews

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Maps & Diagrams

WN84 Sectional

WN84 Diagram