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INSPEC46377
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INSPEC46377
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Entry Properties
Last modified
8/24/2016 9:49:16 PM
Creation date
11/18/2007 11:46:06 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977320
IBM Index Class Name
Inspection
Doc Date
7/22/2002
Doc Name
Blasting Plans
From
LJ Development Inc.
To
DMG
Inspection Date
1/15/2002
Media Type
D
Archive
No
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SITE LOCATIONS & GEOLOGY <br />2. The 8-Mile Clay Mine: (Permit # M-1977-320) <br />Mai 3. shows the general location of the 8-Mile Clay Mine where the geology <br />consists of the sandstone and varicolored clay strata of the upper Morrison <br />Formation. Access to the mine is via Fremont Cty. Rd. 62 from CO. State <br />Rd. 9 off of US 50, +/- 7 miles east of Canon City, Colorado. Further, the <br />map shows streams, roads, utilities, wells, all dwellings with in 3000 ft., and <br />other structures. There is one dwelling and wells exist at a lineal distance of <br />2200 ft. of the proposed blasting. <br />Extensive published geological work has mapped the Morrison Formation, <br />which contains shales and clays that have brick making properties. At this <br />site, the Morrison lies directly below the basal beds of the Dakota Group and <br />strike approximately N 45° W and dips about 30° to the southwest. The <br />position of the mine lies just north of the Mikesell Gulch Fault and exists as an <br />un-eroded hogback island, situated above the surrounding formations. <br />Lonnie Loader Construction of Penrose, Colorado normally conducts <br />blasting. Overburden consists of thin poorly cemented sandstone and shales <br />about 5 to 15 feet thick. Due to the nature of the softness of the clays below <br />the blasting level, a portion of the blast impulse is absorbed on site. Blast holes <br />are usually in diameter with an average depth of 8 ft on foot centers. All <br />holes are stemmed with 2 feet of dirt, thus powder thickness is usually less than <br />10 feet. A delay of milliseconds is used combining <br />(Verbal communication with Lonnie Loader, 5-2-02) <br />
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