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Posts Tagged ‘Wes Danskin’

San Diego Formation: new USGS deep monitoring well progress report November 2011

Posted by George J Janczyn on November 7, 2011

On October 20, USGS under contract with the City of San Diego began operations on a new deep monitoring well in the Chollas Creek vicinity near the intersection of Home Avenue and Federal Blvd. The well is the latest in a series of multiple-depth wells being drilled in selected areas of four coastal river basins for the San Diego Hydrogeology Project.

The primary objectives of the project are to develop an integrated, comprehensive understanding of the geology and hydrology of the San Diego area, focusing on the San Diego Formation and the overlying alluvial deposits, and use this understanding to evaluate expanded use of the alluvial deposits and the San Diego Formation for recharge and extraction.

Project Chief Wes Danskin writes about the latest developments:

November 1:

1. Hit the Otay formation, at 648 feet. Check out the photos of cuttings below; bet you can pick it out too. And we hit it within about 60 feet of where I thought.

And very pleased with my newest idea: poker chips to identify the formations; I can write on them, and they don’t dissolve or fly away like post-its.

The poker-picks you see here are: the San Diego formation identified via shells; and the Otay formation looks like Otay.

Each square sample box is 10 feet of drilling. The rectangular boxes indicate where we took a core.

Photo 1 below is 0-240 feet.

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Posted in USGS, Water | Tagged: , , | 1 Comment »