Laserfiche WebLink
Phase IV Weekly Summary No. 45 Page 2 <br />003-2203 <br />I ~ Ames did not perform any confirmatory drilling activities associated with the Phase Na construction <br />during this reporting period. <br />Phase IVb <br />Ames performed clearing and grubbing of topsoil and removed trees neaz the temporary access road <br />and in the central portion of Phase IVb. Topsoil was piled locally and relocated to the permanent <br />topsoil stockpile above Phase IVc. Ames also removed deleterious material (wood, frozen SF) and <br />hauled this material to a designated location in Upper Arequa Gulch. <br />Ames continued Structural Fill (SF) placement and compaction activities in the western portion of the <br />Phase Nb footprint below UG-234a and above the old HWY 67 alignment. SF materials were placed <br />in horizontal lifts typically not exceeding 2 feet in loose thickness. A Caterpillaz CS563C roller <br />provided compactive effort, while a Caterpillar water wagon provided moisture conditioning when <br />needed or required. SF was bonowed from the slope recontouring activities near the 9640 road in <br />Phase Na and from Phase Nc. SF was also used to backfill "Shallow" workings UG-248, UG-249, <br />UG-250, UG-510, and UG-556. <br />Ames performed excavation remediation activities of known underground workings UG-510 and <br />UG-556. The workings were observed and verified to be "Shallow" or "Deep" as defined in the <br />drawings and will be remediated accordingly. <br />Ames continued placement of Select Structural Fill (SSF) into "Shallow" underground workings UG- <br />248, UG-249, and UG-250. <br />Ames began to place Concrete Plug concrete into "Deep Shafts" UG-202 and UG-251. Ames placed <br />three feet of concrete in accordance with IFC Drawing 12, detail 1. <br />Phase IVc <br />Ames continued placement of SF in Phase Nc at the saddle berm. Ames placed SF borrowed from <br />slope recontouring in Phase IVc neaz UG-269 and UG-281. SF materials were placed in horizontal <br />lifts typically not exceeding 2 feet in loose thickness. A Caterpillar CS563C roller provided compactive <br />effort, while a Caterpillar water wagon provided moisture conditioning when needed or required. SF <br />was also used to backfill "Shallow" workings UG-259, UG-259b-d, UG-283, UG-284, UG-285, and <br />UG-522. <br />Ames performed excavation remediation activities for known underground workings UG-224b, UG- <br />234d, UG-274, UG-275, UG-277b-d, UG-278, UG-280, UG-280b-e, UG-281, UG-283b, UG-284, UG- <br />285, UG-286, UG-503, and UG-508. The workings were observed and verified to be "Shallow" or <br />"Deep" as defined in the drawings and will be remediated accordingly. <br />Ames continued placement of Coarse Shaft Backfill (CSB) into "Deep" underground workings UG- <br />254, UG-256, and UG-258. <br /> <br />Phase lVea57sn U-26.doc Golder Associates Inc. <br />