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REP04532
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REP04532
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Entry Properties
Last modified
8/24/2016 11:35:43 PM
Creation date
11/26/2007 10:49:00 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
Report
Doc Date
1/11/1996
Doc Name
1995 Annual Subsidence Report
From
Powderhorn Coal Company
To
DMG
Permit Index Doc Type
Subsidence Report
Media Type
D
Archive
No
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features were found or suspected, measurements were made of the features. <br />The sprang mspecUon was done m three loops. The fir~.loo~was walked by Larry Resc~tilce <br />on March 28,1995 over projected muung areas of_the RSN ~`IVo structures were fo and the oy <br />sigmficanf features is Elie 7erry_Cree Pictures were ta'l~en-along this inspection rou a fo s~tiow the <br />general layoftt'ofthe area'but"fiaue since been misplaced and aze not available for this report. The <br />second loop was walked by Larry Reschke on June,10, 1995, over portr~ns, of previously mined areas <br />u1 the RS .There were,no structures along.this route and1 the only significant feature is Cottonwood <br />~~ceek ~'ubsidence cracks were i?ound at`tivo locations Pictures 1-12 were taken along the route <br />to show the general layout of the area as well as the subsidence cracks. Cracks were found at <br />Location 3 and Location 4 shown on the Subsidence Survey Routes 1996 map. Pictures 6 and 7 were <br />taken over 9 West where mining was done in April 1991, Location 3. This crack was evident across <br />the top of a ridge for a distance of approximately 200'. The crack was typically 3 - 6" wide and had <br />a visible depth of 2 - 12". The shallow depth indicated partial healing. At Location 4, Pictures 10 <br />and 11 were taken over 11 West where mining was done in April 1994. The crack was evident <br />across the top of the ridge for a distance of 35'. The 1 - 2" crack was visible in the surface shale but <br />was not visible in the sandstone shown in picture 11. This route crossed the subsidence Location 2 <br />from the 1994 inspection, but the crack was not evident The third to ryas ~yalked by Mrke Stahl, <br />a summer helper, on June 16, 1995, over an azea in the RSS~prolec~ed tole ~mned-n the net tutus. <br />The only structure in the azea is a bp„~n~ed d~omest~ic,gr~p,~~e r sand the only significant feature in <br />the azea is Rapid Creek. Pictures 13-34 were taken along the route to show the general layout of the <br />• area. -~- ~ <br />The Fall tour included inspections by Larry Reschke at both the RSN and the RSS and <br />included 3 loops. The first loop was partially driven and partially walked on September 21, 1995 <br />over portions of the RSN current and projected mining azea. One structure that was found was a <br />"guzzler" installed by the Colorado Division of Wildlife to help furnish water to Chuckers. rain is <br />collected on the corrugated fiberglass sheets; stored in a buried barrel; and slowly regulated to a <br />small watering trough. Subsidence is not expected to affect the function of this structure. Jerry <br />Creek is the only significant feature in the azea. Pictures 59-74 were taken of the guzzler, at sites <br />along the creek bottom and of the general layout of the azea. The second loop was primarily driven <br />with short walking loops on October 28, 1995, over portions of the RSS projected to be mined in <br />the near future. Tt~er~e is,~a hsg}r;~uKolta~~evy~er,~lu~e~a~r~o~hea~a~n~d,a b„u,~ned~doe~s c waje~li~e. <br />The.powerlinewas ns~alledsub~equent to the coal lease and v~as.lnstap~,tlthe u,~nders~a~ndingJ~hat <br />fn..~.. <br />rrunmg coup subside the Jm~. Rapid Creekyis the only significant feature m the area. Pictures 35-51 <br />were taken of the general layout of the area. The third loop was walked on November 30, 1995, over <br />portions of the previously mined azea of the RSS. No structures were found in the area and no <br />significant features were found. No subsidence features were found. A couple of seeps were found, <br />neither showed a measurable flow. Pictures 52-58 were taken of the general layout of the azea and <br />the seeps. <br />• <br />Page 3 <br />
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