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Havasupai Flash Flood July 2018

Posted: Jul 12 2018 9:17 am
by chumley
A flash flood last night caused helicopter evacuations for all visitors. The campground is closed until further notice. The road to the Hilltop has been damaged by debris flows and is closed.

http://www.azfamily.com/story/38630500/ ... and-canyon

Re: Havasupai Flash Flood July 2018

Posted: Jul 12 2018 10:36 am
by SuperstitionGuy
I have a grandson down there and his group is OK and in line to get helicoptered out. :DANCE:
Let us hope no one was swept downstream and that the damage to the village and the trails is lite. :pray:

Re: Havasupai Flash Flood July 2018

Posted: Jul 12 2018 11:09 am
by chumley
Apparently they expect to be closed only 7-10 days, so hopefully the damage isn't too extreme.

It says that the creek rose 7 feet last evening and the campground was evacuated.

There was a second flood that came through around 3am. The second one was preceded by a Flash Flood warning issued by the NWS. As far as I know, the first flood did not have a warning issued.
https://www.azcentral.com/story/travel/ ... 779156002/

Re: Havasupai Flash Flood July 2018

Posted: Jul 12 2018 3:02 pm
by chumley
The USGS Stream Gauge shows that the first flood around 7pm last night reached about 800cfs, and the second flood overnight reached about 1700cfs. The regular flow is 65cfs, and it has returned to near that level today.

For reference, the flood in August 2008 that altered the course of the creek and dried up Navajo Falls also destroyed the stream gauge. It is estimated that flood reached 6000cfs. So this one was significantly smaller by comparison.

With records going back to 1995, annual floods on Havasu Creek seem to get over 100cfs in about 4/5 summers. Floods that reach 800cfs seem to happen about every 3 years. The big floods over 5000cfs have happened three times in the past 20 years. During years of at least a 400cfs flood, it was extremely common for there to be 2-3 additional floods of similar size during the course of the summer.

2015: 700cfs flood
2013: 800cfs flood
2010: 800cfs flood
2008: 6000cfs flood
2006: 5000cfs flood
2005: 900cfs flood
2002: 1900cfs flood
2001: 1200cfs flood
2000: 1000cfs flood
1997: 7000cfs flood
1996: 1000cfsflood

Re: Havasupai Flash Flood July 2018

Posted: Jul 12 2018 4:35 pm
by azbackpackr
Downstream from Havasu Creek, Diamond Creek flashed yesterday on the Hualapai Reservation. Data page shows 4500 cfs, but also, the gauge seems to now be busted. Usual flow is about 3 or 4. The beach there at the Colorado River is an important take-out for Grand Canyon river trips, although not the only one. I drive a bus there, down 22 miles of rough dirt road, about 3x a week. Yesterday I drove out of there at noon with 23 passengers. Apparently it flashed a few hours later. When the road is closed, my company picks up passengers at Pearce Ferry, another 55 miles downstream.

Re: Havasupai Flash Flood July 2018

Posted: Jul 12 2018 8:38 pm
by azbackpackr
@chumley
Looks like Havasu Creek flashed again today. Don't know about Diamond since it apparently broke the gauge.

Re: Havasupai Flash Flood July 2018

Posted: Jul 13 2018 6:17 pm
by SuperstitionGuy
Update on my Grandson. When he got home last night he had nothing as the flood took it all including his hammock. His mother said "wasn't the hammock tied to a tree?". He said "yes mom but the tree was GONE."

Re: Havasupai Flash Flood July 2018

Posted: Jul 13 2018 6:44 pm
by tibber
SuperstitionGuy wrote:
Jul 13 2018 6:17 pm
Update on my Grandson... His mother said "wasn't the hammock tied to a tree?". He said "yes mom but the tree was GONE."
:o

glad he's safe. I'm sure you're all relieved.

Re: Havasupai Flash Flood July 2018

Posted: Jul 13 2018 8:59 pm
by big_load
SuperstitionGuy wrote:
Jul 13 2018 6:17 pm
Update on my Grandson. When he got home last night he had nothing as the flood took it all including his hammock. His mother said "wasn't the hammock tied to a tree?". He said "yes mom but the tree was GONE."
Yikes! I'm glad he's safe.

Re: Havasupai Flash Flood July 2018

Posted: Jul 26 2018 8:43 am
by hikeaz
July 25, 2018 at 4:15 pm

PHOENIX — A popular hiking and camping destination in northern Arizona will be closed to visitors until the end of August because of flood damage.

The Havasupai Tribal Council announced on its website Tuesday (7/24) that the Havasu Falls area on the Havasupai reservation in the Grand Canyon would remain closed until Aug. 31, 2018.

Re: Havasupai Flash Flood July 2018

Posted: Jul 26 2018 9:26 am
by SuperstitionGuy
@hikeaz
Are they looking for volunteers to help repair the damage? :-k

Re: Havasupai Flash Flood July 2018

Posted: Jul 26 2018 9:34 am
by chumley
@SuperstitionGuy
I've seen people offer to volunteer on the tribe's facebook page, and they have responded saying that there is no mechanism in place to organize and manage volunteers so they would only be in the way and actually make the process more difficult. So, basically, no.