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Subsidence Fetd Observanons <br />West Elk Mane <br />July 22-24, 2003 <br />• Overburden depth to the B-Scam ranges from 1,400 to I,SOU feet. <br />• \o subsidence cracks or hul_~es were observed ,lone the tr:tversc. <br />4.2.3 Traverse H-H' <br />Traverse 1I-I1' begins at a lork in dell roods--tu (\1DW-15-U2 and :viUN'-17-U2-und ends at <br />operating Mcthanr Drainage Well h1DW-17-U2. <br />• Traveled above the castcln pans of mined-out longti•all Panels 15, IG, and the northeastern <br />pan of mind-out longwull Panel 17. <br />• Traversed mostly in deep rich soil, like in Traverse G-G'. An outcrop of fructured sandstone <br />:Ind siltstone is located at well site IviDW-17-02. <br />• Overburden depth to the B-Scam ntngrs from I,lUO to 1,425 (eel. <br />• \o rampletely verifiable subsidence cracks were observed on traverse. How~cver, one <br />irregular crack as much as 0?5 inch wide was observed in the bednx:k on the cut bank. This <br />small crack has an estimated 75 percent likelihood of being mining related because the area is <br />located within the area of minim influence of Longwall Panel 17 I;f'igure 11). <br />- - - -- <br />.'F'~l r /: .~ ~:li <br />•. , <br />-+ - <br />` ` i <br />~` <br />.., ' C <br />E,~y;: - _ ~ I ~gure 11. Weuw;uJ ~:cw ul vrcgul:v cr,Yk luculcd in sundsturk end <br />«~ ~~,mc m the col bunA at well ~:te t`tDw~ 17-02. Cr,kt. hm u~ num~tcJ <br />,~ <br />`~ j ~ ~Y ~ ~ ;~c r:cnl hkeldtuud or being rrlaled to numne <br />-~ ~ - s~•Y!:- <br />631.032.610 Wright Water Engineers, Inc. Page 20 <br />Soptombor 2003 <br />