World's Greatest Waterfall... Without Water!

World's Greatest Waterfall... Without Water! (HM2E7T)

Location: Coulee City, WA 99115 Grant County
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Country: United States of America
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N 47° 36.429', W 119° 21.806'

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Inscription
The sheer cliff in front of you was once the world's greatest waterfall. From here, you see only the western portion of this remarkable Ice Age floods feature. With the end of the last Ice Age, floodwaters no longer swept through Grand Coulee, leaving the waterfall high and dry.
Eroding BackwardsRaging floodwaters poured over the lip of the falls, plucking chunks of basalt from its base. Eventually, the overhanging cliffs collapsed into the plunge pool. With each collapse, the falls edged further upstream. Over time, the waterfall moved 18 miles from Soap Lake to Dry Falls, creating Lower Grand Coulee.
(top illustration caption)
This painting shows how the floods might have looked from this location. During the largest floods, you would be under hundreds of feet of water. Illustration by Stev H. Ominski
(right illustration caption)The force of water dropping hundreds of feet over the falls eroded deep hollow spots below it, called plunge pools.
Details
HM NumberHM2E7T
Tags
Placed ByWashington State Parks
Marker ConditionNo reports yet
Date Added Sunday, February 10th, 2019 at 7:02pm PST -08:00
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Locationbig map
UTM (WGS84 Datum)11T E 322368 N 5275344
Decimal Degrees47.60715000, -119.36343333
Degrees and Decimal MinutesN 47° 36.429', W 119° 21.806'
Degrees, Minutes and Seconds47° 36' 25.74" N, 119° 21' 48.36" W
Driving DirectionsGoogle Maps
Area Code(s)509
Which side of the road?Marker is on the right when traveling North
Closest Postal AddressAt or near 35661 WA-17, Coulee City WA 99115, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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