Laserfiche WebLink
~~ ENGINEERING & SURVEYING COMPANY <br />• BOX 674 • 443 DODGE • DELTA, COLORADO 81416 • 303-874.7593 <br />• <br />7F_r91-S~r <br />Subsidence and Slope St.at,ilit.y <br />Decemt,er ~?, ly~,t~ <br />Mimed Land Reclamation <br />423 Cer~t.er~riial Ruildirig <br />1313 Sher-marl Street <br />Deaver, Colorado E;020:, <br />At.t.errtior~: Cathy Rege.i <br />Re: Subsidence and Slope <br />Rear Coal Company <br />hear Mine No. <br />Rear Mine Np. 3 <br />Somerset., Colorado <br />t~ ,. a j;~' t,r <br />l! H Yom. v.' •er• ~ t`: i+..n Oxd~ <br />JA~J ~ 7 ?9~9 <br />P~I~•;~D Ltl,~dD <br />~tcCLhN1ATi0iJ DI'll$IOhI <br />Stability monitoring: <br />UTE ENGINEERING AND .`iURVEYING C:CrMPANY completed two (?j sut~- <br />sidence and slope stability surveys during June, 1'ac,° and Novem- <br />t,er, 1'=+~=~C~ for thie Rear- Miae ii ,, ar~d t.h~e Crld Rear- Miae ~2. <br />These surveys are based on ~ contro] monuments loc:at.ed across the <br />canyon on the property of the Kaiser Coal Company (Formerly U. ~,. <br />Steel), that gave teen in place for several years. Tt~e monuments <br />are referred t.o cs D-11-11 grid D-12-11. See Map for ]o:.at.ior~. <br />The monuments are 3-inch pipe with a 4-inch plate so ttie elevc:- <br />tiori will t,e fixed for- each r-eadir~g_ TF~e coordinates of the <br />monuments are: <br />Northing Eastir~g Elevat.ior~ <br />n-11-u aos,oos.~" l,aao,5a~_s7 ~1~.s.~a~ <br />D-12-U aC5,418.32 1,aa1,625.51 61?5.50 <br />Threse coordinates and elevations will remain fined and all other <br />points will be relative to them_ <br />We Have developed a sequence for t.rie surveys t.hiat divides tF~e <br />stations into primary control loops and points tied by sidesF~ot <br />only. All st.at.ions are 3" diameter- steel pipe descrit,ed in our <br />report dated August. 10, 1'at:5 ur~les=• r~ot.ed otf~er-wise_ <br />• <br />