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2015-08-05_REVISION - M2010071
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2015-08-05_REVISION - M2010071
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Entry Properties
Last modified
6/15/2021 2:33:16 PM
Creation date
8/12/2015 4:04:01 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2010071
IBM Index Class Name
Revision
Doc Date
8/5/2015
Doc Name
Application AM01
From
City of Lafayette
To
DRMS
Type & Sequence
AM1
Email Name
MAC
WHE
Media Type
D
Archive
No
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6.4.7 Exhibit G - Water Information <br />1) The operation will affect groundwater systems, however through execution of <br />the temporary substitute water supply plan, there will not be a net change to <br />tributary groundwater flow to Boulder Creek. <br />2) (a) Surface water structures are shown in Exhibit C1, Pre -Mining Plan Map <br />b) The sand and gravel deposit to be mined is an alluvial aquifer tributary to <br />Boulder Creek. <br />c) Water from dewatering operations is routed to sediment pond to allow for <br />settling of suspended sediment. A stormwater management plan has been <br />prepared for the site which identifies BMP's to prevent pollution to surface <br />waters due to stormwater runoff. <br />3) Under full operation, the project will consume approximately 20 acre -ft / year <br />due to evaporative loss of exposed groundwater in dewatering trenches, <br />water lost within the mined product and water consumed for dust control. <br />4) The replacement source for all depletions to Boulder Creek is fully <br />consumable water rights owned by the City of Lafayette. <br />5) The applicant has applied for and received a NPDES Stormwater Discharge <br />Permit. The permit number is COG501535
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