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2004-04-28_REVISION - M1977020
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2004-04-28_REVISION - M1977020
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Entry Properties
Last modified
6/15/2021 5:42:30 PM
Creation date
11/21/2007 9:09:00 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977020
IBM Index Class Name
Revision
Doc Date
4/28/2004
Doc Name
Adequacy Info
From
Oldcastle SW Group Inc dba United Companies of Mesa County
To
DMG
Type & Sequence
AM3
Media Type
D
Archive
No
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RECLAMATION PLAN <br />The post-mining plan allows the pit to flood and the border of the lake to be reclaimed as <br />wetland. Also the land surrounding the permit azea will be topsoiled and seeded to control <br />erosion. Prior to flooding all earthwork and seeding will take place. Mining slopes will be near <br />vertical. The slopes will be reclaimed to 3H:1 V by dozing the upper highwall down towards the <br />pit bottom. The remainder of the cutJfill balance will be made up from excess overburden and <br />imported materials. The imported materials will be inert. They will be imported from the <br />adjacent production facility. A majority of the imported materials will be reclaimed asphalt and <br />concrete. All concrete with exposed rebar will be buried a minimum of 3' from the surface. <br />Imported material greater the 2" in diameter will only be used in slope reclamation not in the <br />replacement of the buffer between Amendment #1 and Amendment #2. To further enhance <br />wetland growth, the ramp used to get in and out of the pit will be left at 7H:1 V for a width of <br />approximately 24 feet. <br />Four major tasks will occur at the end of mining: Final Grading, Buffer Replacement, Topsoiling, <br />and Seeding/Revegetation. The site is expected to have 1500 feet of highwall left at the end of <br />mining. The cross-sectional azea to be moved is 300 square feet. This results in 1'7,000 CYD to <br />be moved. The material will be moved using a D8 or equivalent dozer. Final grading will be <br />done by pushing the crest of the pit wall down to the toe. Once final grading has been completed <br />the 1500 feet of highwall will need to be topsoiled. The buffer will be installed as seen in Map F. <br />The buffer will have a 50' wide bench on top with 3H:1 V side slopes. The total volume of the <br />buffer is 16,000 CYD. The material will be provided by the overburden stockpile with an <br />estimated volume of 20,000 CYD. If the additional material is needed the visual berm along <br />the southern border of Amendment #2 will be used. The buffer will be replaced using 2" minus <br />material only. This will help to ensure the 90% maximum dry density compaction of all buffer <br />material. The compaction will be completed in small 12" lifts. Also all compaction will be <br />measured to ensure that the specification of 90% is met. Once the buffer installation and <br />highwall grading is complete, both slopes and flat areas will be topsoiled with a minimum of 6" <br />of material to a elevation 5' below the expected water table. Approximately 12 acres require <br />topsoil currently. Two topsoil stockpiles exist with a total of 15,000 CYD. At 6" of topsoil the <br />16.5 acres will require 13,310 CYD of topsoil. If surplus topsoil exists a thicker layer will be <br />applied. Once all earthwork has been completed the entire Amendments #1, #2, and #3 will be <br />revegetated as wetland or dry rangeland. The total area remaining is 15.58 acres. 1.25 acres will <br />be revegetated as wetland fringe, and 14.33 will be revegetated as dry rangeland. <br />For both the dryland and wetland areas, the soil will be disced to loosen the soil. Due to the mild <br />grade, seed can be drilled in both regions. Certified weed free mulch will be crimped into the <br />surface at 20001bs per acre for the dry rangeland azeas. The areas will be seeded with the <br />following seed mixes, which were recommended by the NRCS for the nearby Fredlund Pit, west <br />of the site. <br />Pit No. 1 1 /04 3 <br />
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