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UNION PACIFIC RAILROAD COMPANY Las Vegas, Nevada Location: Water W ell #10 H istory 2306* South and 1140* West from % corner, section 31, 20 - 6 1 - M. D. B. & M. E levation: 2133 (Cement Matt) Spudded; 10:00 F .M ,, May 8, 1912 Completed; June 5, 1942 T otal Depth; 1250* 5/ 8/42 5/10/42 5/11/42 5/12/42 Spudded at 10:00 P .M ., May 8 , 1942. D r ille d with 1 % B b it (Crum) to 208. D r ille d with 17-3/4” Crum b it from 208 to 49®* Beamed hole to bottom 49® with 17-3/4** Crum b it . Started running 13-3/8“ casing in hole at 8 :4 0 A .M ., shoe o f easing started hanging up 2 4 * Worked shoe o f easing down to 35 but eould not work same below that depth. Started p u llin g out easing at 9*30 A .M ., May 12th. Reamed hole with 20-3/4** Wright p ilo t b it to 51 end a 17-3/4** Crum b it to 49®. 5/13/42 Made second attempt to run 13*3/®* easing. Started running easing at 3 :5 5 A.M. easing stopped abruptly with shoe at 5 5 . Shoe could not be worked below that depth. Started p u llin g 13*3/®* casing out o f hole at $:00 A .M ., May 1 3 th. Reamed hole with 20-3/4** Wright p ilo t b it to 110. Then reamed to 498 with 18-5/8* Wright p ilo t b it and S ievers reamer. 5/15/42 Ran 520.45’ (13 jo in ts ) o f 13-3/8* - 48# South Chester Tube C o.*s lapw eld, S-V short thread, casing. Cemented shoe o f 13-/8* casing at 494*30', using 4?3 sacks o f V icto r M odified cement, none treated. Cement mixed by r i g 's crew and pumped down by r i g ’ s pumps. Two Perkins plugs used. Baker cement flo a t shoe on bottom o f 13-3/8" casing. Finished osm.ent.ing at 9: 49 P.M ., May 1 5 th. 5/16/42 Added 17 sacks o f V ic to r M odified cement around casing in c e lla r . 5/17/42 13-3/8" casing, stood cement 36 hours. San in with 12-3/8" b i t . H it top o f wood plugs at 492* D r ille d through shoe o f 13-3/8* 12:30 P.M ., May 17th. H it shoe at 494*30* Continued d r i lli n g ahead with 1 2 - 3/8* Crum b it . Finished making hole to 1250, with 12-3/3* b it on May 21st. Then scraped hole out to 13-1/2* t9 84Q.