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The camp site (SRT 132) was tested further by MAC, and a5 •a r?salt of that tasting, MAC r?comme~eed that the site wa; not eligible for listing on the national Registzr of Historic Places. SHPC has concurred with that re.:ommencation. dated on information orovieed in the applicar'•on (Tab 5) and S:iPO ccncurr?nca. the Civi;icn finds, pursuant to Rule 2.07.6(2)(e)(i), that the oae~ation will net ddv?r;e'.y affect any publicly owned park or place list?d on the national R?•~i;tzr of Historic Places. The prcposzd cceraticn is in como'iancz wi*_h the rzeuirement; of thi; section. IY. G?o~cav - Rulzs 2.04.5 and 2.Oa.6 ;;e.lcg'c baszlinz information including locdi and regicna' st~uctura and ;trdtigraphy, and information on interburden, ov?rburden ane cca' gzocne:nistry is provided in Volume 2, Tab 6, of the permit application. The Seneca II-W Mine is situated in the southeastern synclinal portion of the Sand Wash Structural Basin of northwest?rn Colorado and south central Wvcming. Exposzd strata near the mine site Vdry In dge from Lit? ,fet3C?OU; to Quaternary. Most unit; in the area ar? marine ane non-marine s?eiment;. '~cwe•der, ;eme Mioc?ne e:<trusives are locally pr?sent (Frgura plc. i). Many fault; and folds modify the regional ;vnclinal structure. -he .r.c;t ;iyn:f'Cant lOCdl fold is the $dge Gr??k Anticline, IGCiC?C ;U;t ?a;t :f the nine. The Seneca II-'+! Mine lies on the westzrn flank of thi; anticline. The largest local structure is the Tow Creek anticline, locatze dccu*_ 10 milts northeast of the permit area. In the permit ar?a, no significant fault; cr fold; haa? de?a identified. The local stratigrachic sequence, in ascending order, is the Manes Shalt; thz Mesa~rorde Group, xhich is subdivide? into the I12; and Wi':iiams For< -:rmat:ens; the Le~.vi; Shale; and the Lanc? Formation. A11 are _^^e~ Cretaceous in aye. Gverlying the Lance Formation are the Tert,ar,~ Fort Union and Wasatch Formation;. Alluvial deposits ar? locally present in str?am valleys, particularly along the larger streams. Colluvial slides and slumps are also present in canyons and gullies throughout the area. Slide bodies which could potentially affect the stability of mining related structar?; in the northern portion of the permit 3r23 have been identified, and ritiga`ion mearures art aadr?;std in S?cticn XVIi., "OaC<filling and Grading" of thi; document. The Unlt of particular interest to the Szn?.a II-'+1 Mine '; tnz ','GO?' Gr?tdC?.U; Mes3v2rde GroUC. The Seneca II-'rJ Mine will e~',ra.t tnr tai ;?3m; from thl; Un't. Th? Me;3Veftle, In this Oart Of north'xe;t?~" _' era, ;'. `; divided into two formations: 1) the 1550 foot thick Iles Fcrmdt`cr,, ar.c 2) the overlying i100 to 2000 foot thick Williams Fork Formation.