1505 INDUSTRY ST Geotech Report 2018-01-02 MF Import

Rinkcr Materials April l3, 2002 Page 2 During the 2000 grading season,we visited thc ^te on an intermittent to part-tim::basis on 50 occasions hetween June 23, 2000 and September 14, 2000 to observe earthwork which incfuded cutting at the site. A small amount of fill was also placed on Ihe cast edge of the site lor a haul road and alung the toe of a fill slopc placed on Rinker Matenals Lots 9 and l0. Results a(our consWction monitoring services are presented in our daily field reparts For the 2000 pmjec[, Nas. I thralGh 50. Copies of these reports were given to Rinkrr Materials and KLB during constr�ction. During the 2001 gradin� seasun, we visited the site on a part-[ime basis on 111 occasions betwcen March 23, 20�11 and October 12, 2001 to observic eaRhwork which induded cutting and filling at [he site. Results of our construction monitoring services are presentcd in our daily field reports for the project, Nos. 1 through I11. Copies of these rcports were given to Rinkcr Materials, KLQ, 1Vashington Federal Savings, Soil & Environmental Lngincers, and INTRACOC•'.P during conshuction. Our earhwork monitoring services included the following activities and observations at the site. • Pit 11oor preparation • Cuning • FlaCcning of Ihc noRh-south pi[hiy,hwall • Ben�hing new fills into native cut slopes and previously placed fill slopes • Structural fill placcmcnt and compaction • Removal oC temporary ramps and the northeast undocumented fill area PIT FLOOI� PREPARATION Lxposed surfaces resulting Gom Ihe mining activi[ies or past grading activities were evaluated by a representative from GeoEnginer.rs pr:or ro placing fill. The rontractor removed laose and di:;turbed soils Ihat had accumulated on the pi! floar. Accumulalions of sloughed soils along the hi�;hwalls and HIl slopes were also removcd prior to evaluating the pi[ fluors and prior to placing fill in thosc areas. Ivative advance out�vash sand deposits were exposcd on the pit tloors. Our representative eval�ated thc pit floor areas by probing with a %:-inch-diameter steel prabc rod and by o6serving lhe condition and performance of the pit floor under cquipment loads. Basr.d on our abservatians and evaluations, it is our opinion that the pit (loor areas evaluatcd dunng our site visits wcre prepared in gcneral accurclance with our recommendations and the Letter of Understanding. CUTTING Extcnsivc cuts werc made on the southem l�alf of the site to achieve rough grade. SigrtiFicant grading at Ihe site conunenced in 2000, but relalively little fill was placeri d;zt year. Gradir.g, which again includcd significant cuts on the southem half of the site, resumed ir: 2001 when the majority oF the fill was placed in the east rr:ined pit arca and in the northwest are�. ❑ c u :� n :: '. n c : r s fileNu 6192-0U7-0)4U0