594f5345524f434b2022020181129011

2018 El Portal Road debris flow | debris slide

Water rushing down a rock slope and pooling on the road with rock debris, sand and silt across both lanes.

During a period of high intensity rainfall (0.6 cm/hour) there were several small debris slides and debris flows onto the El Portal Road within the area burned by the Ferguson Fire. Several small rocks fell onto the road at Parkline, and about 5 separate small debris flows came onto the road between Cookie Cliff and Arch Rock. These debris flows consisted of sand and silt.

UTM East: 257531; UTM North: 4173691; Elevation: 748

U.S. National Park Service

To the best of our knowledge we believe this image to be copyright free and in the public domain. When using this asset for any purpose, including online, credit: 'Courtesy U.S. National Parks'

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Yosemite National Park, Code: YOSE

Merced River Gorge
Latitude: 37.6783973273819, Longitude: -119.74945588

El Portal Road
Yosemite National Park, California
Latitude: 37.8399200439453, Longitude: -119.540397644043

Rock Fall Database GroupID for YOSE : 2018112901
Rock Fall Database ID for YOSE : 2018112401-3

Yosemite Rock Falls Collection

20181129

11/29/2018

Public Can View

Organization: Yosemite NP
Position: Park Geologist
Address: El Portal, CA 95318
Email: greg_stock@nps.gov

Wednesday, May 11, 2022 11:43:51 PM

Tuesday, August 9, 2022 5:48:29 PM

2018112901_1_NPS.jpg

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