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2009-11-25_PERMIT FILE - M2009035
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2009-11-25_PERMIT FILE - M2009035
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Last modified
8/24/2016 3:57:14 PM
Creation date
11/30/2009 7:58:45 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2009035
IBM Index Class Name
PERMIT FILE
Doc Date
11/25/2009
Doc Name
Response to second adequacy review
From
Austin Civil Group, Inc.
To
DRMS
Email Name
THM
Media Type
D
Archive
No
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112 APPLICATION PAGE 7 OF 35 <br />6.4.4 EXHIBIT D - MINING PLAN <br />(a) Descriptions of the methods of mining to be employed in each stage of the operations as related to the <br />surface disturbance on affected lands; <br />The proposed sand and gravel mining pit properties consists of four properties totaling <br />approximately 82.765 acres in size, and are irregularly shaped properties. The total <br />permit area will include 34.34 acres for all mining operations. The mining area will <br />include 30.25 acres for excavation of sand and gravel. All mining sand and gravel <br />operations including topsoil stockpiles, overburden stockpiles, water settling ponds, and <br />material processing will occur within the 30.25 acres. The permitted 34.34 acres allows <br />for buffer areas to be road construction and maintenance, drainage pipe <br />maintenance, temporary topsoil stockpiles, and temporary overburden stockpiles. <br />Temporary disturbances will include 0.19 acres to construct the access road. All other <br />access roads are currently located on the site and will not require improvements. No <br />other improvements are anticipated outside the mining area. <br />The sand and gravel will be progressively mined across the permit area using open pit <br />mining techniques. Removal of overburden and mining for sand and gravel at the <br />highwall area will be required at a 3:1 slope. The mined areas along the perimeter of <br />the reclamation ponds will be set to final grade and backfilled using overburden from <br />the next mined area and imported inert fill where necessary to achieve final grades. <br />As the backfill material is placed near final grade, the areas will be prepared for site <br />reclamation. <br />The mining operations will utilize standard heavy construction equipment during the <br />sand and gravel mining operation. This includes equipment such as trackhoe <br />excavators, front-end loaders, scrapers, graders, compactors, water trucks, dump <br />trucks, rock crushers, conveyors, etc. The sand and gravel material will be crushed, <br />screened, and stockpiled at the permit site. The operations will not be producing <br />"washed" rock products. <br />A portable scale facility will be located near the access of the site to track materials <br />removed from the project site. <br />Surface disturbance activities and disturbed areas are listed below: <br />ACTIVITY MAX. DISTURBED AREA (ACRES) <br />Access Roads 0.19 <br />Scales 1 <br />Topsoil Stripping 4 <br />Process Equipment (In Topsoil Stripped Area) 4 <br />Material Stockpiles 4 <br />Active Mining /Backfill Area (In Topsoil Stripped Area) 4 <br />Settlement Ponds 1
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