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2022-07-22_REVISION - M2010071
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2022-07-22_REVISION - M2010071
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Entry Properties
Last modified
7/22/2022 3:07:01 PM
Creation date
7/22/2022 3:00:49 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2010071
IBM Index Class Name
Revision
Doc Date
7/22/2022
Doc Name Note
Cover Letter
Doc Name
Adequacy Review Response
From
City of Lafayette
To
DRMS
Type & Sequence
TR1
Media Type
D
Archive
No
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(c) Water Diversions and Impoundments <br />No surface water diversions are planned during mining of the site. Groundwater <br />shall be diverted by pumping from dewatering trenches to a settling pond <br />impoundment as shown in Exhibit D Sheet-2. It should be noted that as part of <br />the reclamation plan, a stormwater diversion swale will be constructed around <br />Cell 2A for the purpose of diverting stormwater runoff from being impounded by <br />the reservoir. <br />(d) The Size of Areas to be Worked at Any One Time <br />Since both Cells 2 and 4 and 2A will be worked at the same time, the size of area <br />to be worked at any one time is approximately 100 acres. <br />(e) Mining Timetable <br />Currently, the only remaining pit run occurs in Cell 4. Mining of Cell 4 is expected <br />to be completed by the end of 2021 or beginning of 2022. Additional excavation <br />of Cell 2A will occur 2021-2022 to advance the reservoir volume, however no <br />saleable material remains in Cell 2A. <br />(f) The Nature of Deposit to be Mined and Overburden <br />The thickness of sand and gravel to be mined varies from 0-14 ft. The thickness <br />of overburden varies from 5-13 ft. The stratum underneath the sand and gravel <br />deposit is weathered claystone followed by indurated claystone. <br />(g) Secondary Commodities <br />Overburden will be used as structural fill for various local construction projects. <br />(h) Use of Incidental products <br />Other than structural fill identified above, no other incidental products are <br />expected to be extracted from the site. <br />(i) Explosives <br />No explosives will be used <br /> <br /> <br /> <br /> <br />
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