Wednesday, July 14, 2010

Overflowing Shellpot Creek video and photos from todays monsoon

For the first time since we have lived in this house, Shellpot Creek lept its banks and flooded portions of the backyard.

The waterfall is an almost flat raging, rushing torrent.

A view of the flooded backyard from an upstairs window.

Just as dramatic was that it couldn't drain fast enough in front of the house.

The creek flows from the cul-de-sac...

...down the street.

Technically, for a short period this afternoon, our house was on an island in the middle of Shellpot creek as the creek flowed down Stoney Creek Lane in front of the house and joined the main branch further upstream, even as it flooded from its usual location in the back of the house.

Here is a video showing the creek first beginning to leave its banks.

Here is a video showing the height of the flooding of the backyard.

There was really no damage except some lost mulch that had just been put down, perhaps some plants were swept away and the regular creek junk left in our yard instead of high in the creek bed. You can see the creek is so high that the waves from the creek just crash across the yard. I also watched as large logs and debris from the creek floated through my yard and under the fence to the neighbors (and hopefully back to the creek so they don't have to deal with it).

It was a dramatic flooding event, but the house suffered no damage whatsoever since it sits high on the lot.

UPDATE: Charts from the the USGS stream gage on Shellpot Creek. This gage is downstream from my house, but since the water at my house, plus some more goes through the gage, it is a useful, official measurement of the creek flow.

The discharge in cubic feet per second. You can see July 13th's morning rain, July 14th's morning rain, and the high peak of the flood recorded in this post. Note that the scale is a log scale, so the peak at 3100 cuft/s at 2:35pm on 7-14-2010 is 50% more than the 2130 cuft/s at 6:45am on 7-13-2010.

The gage height. Gage height is a linear scale.

At least now I know that ~3000 cu ft/ second and a gage height of ~7.5 ft means water in the backyard.

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