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…The shallow upper basin, called the Alluvial Aquifer, generally underlies the Santa Clara River and its tributary creeks. Water seeps down into the sands and gravels beneath the river, where it is pumped from relatively shallow wells (to 200 feet in depth). The aquifer is estimated to store over 200,000 acre-feet of water… |
…Underlying the Alluvial Aquifer is another, deeper layer of groundwater called the Saugus Formation, which receives some of its water from seepage of the Alluvial Aquifer as well as from parts of the aquifer exposed to the surface… |
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| from Chapter 1, pg 13 |
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