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REP41820
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REP41820
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Entry Properties
Last modified
8/25/2016 12:43:38 AM
Creation date
11/27/2007 9:08:15 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1985203
IBM Index Class Name
Report
Doc Date
7/22/2002
Doc Name
Blasting Plans
From
LJ Development Inc.
To
DMG
Media Type
D
Archive
No
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SITE LOCATIONS & GEOLOGY <br />2. The Edmundson Clay Mine: (Permit # M-1985-203) <br />Map 6. shows the general location of the Cedarwood Mine where the geology, <br />again is very similar to that of the Edmundson Mine, and consists of the strata <br />and clays of the Glencairn Formation, Dakota Group. Access to the mine is <br />19 miles north of State Highway 10 at Cuchara Junction, following County <br />Rd. 122 9.5 miles to a locked gate, then an additional 9 miles via private <br />road. Further, the map shows streams, roads, utilities, wells, all dwellings with <br />in 2000 ft., and other structures. There are no dwellings or wells within <br />2000ft. of the proposed blasting. <br />Extensive published geological work has mapped the Dakota Sandstone Group <br />with the associated clays throughout this section of Pueblo County. Near the <br />middle of the Dakota Group lies the Glencairn Formation, which contains <br />shales and clays, which have brick making properties. Site specific geology <br />indicates that the subject Dakota Group strikes N 40o W and dips to the <br />northeast, situated 100 ft. above the Huerfano River. <br />L.W. Weir Transfer, Inc. of Pueblo, Colorado normally conducts blasting. <br />Overburden consists of thick-bedded sandstone about 5 to 10 feet thick. Due <br />to the nature of the softness of the clays below the blasting level, a portion of <br />the blast impulse is absorbed on site. Blast holes are usually 3.5" in diameter <br />with an average depth of 8 ft on 8-foot centers. All holes are stemmed with 3 <br />feet of dirt, thus powder thickness is usually less than 5 feet. A delay of 25 <br />milliseconds is used combining 2 holes. <br />(Verbal communication with Lloyd Weir, 4-29-02) <br />
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