1920 GRAND AVE 2016-01-01 MF Import

GEd i cCHNiCAL ENGINEERING STUDY - '�52"v Grand -.- =._�i�:. cnt��rises E-9466 Dec=mber 21, 2000 Page 2 The site consists of a fairly level area within fifty (50) feet of Grand Avenue then slopes down to the railroad right-of-way. The slope is approximately eighty feet high with (` inclinations on the order of 90 percent. The slope was observed for signs of instability � durina our site explorations. No indications of recent movement we�e observed during our site visit. The trunks of the trees on the slope are straight indicating little or no past slope movement. We o6served several large deciduous trees that have been topped in the past. These trees are in poor condition and should be looked at by a qualified Arborist to determine if they should be removed. The trees should at least be pruned to encouran,e new growth. The trees should be removed if they are rotting or dead so thev do not fall and remove the root zones from the slope. If the trees are removed, the stumps should be left in place. The street frontage currently has curbs, planting strip trees and sidewalks, however they were observed to be in very poor condition at the time of our site visit. We anticipate frontage impro•�ements will be accomplished as part of the project and the existing sidewalk m�•y be removed to accomplish temporary cuts. Subsurface Subsurtace conditions were evaluated by drilling three borings at the approximate ` locations shown on Plate 2. Please refer to the Boring Logs, Plates A2 through A6, for - a more detailed description of the conditions encountered at each location explored. A ; description of the field exploration methods is included in Appendix A. The following is a generalized description of the subsurface conditions encountered. � Underlying the topsoil near Grand Avenue, we encountered about four feet of fill. The fill consisted of silty sand with gravel (Unified Clsssification SM). The fill was f' underlain by five to six feet of dense sandy silt underlain by very dense poorly graded (■ sand with silt. Our boring at the top of the slope encountered six feet of loose to medium dense silty sand (SM), three feet of very dense sandy silt to silty sand (ML to C SMI and seven feet of fat clay ICH) underlain by very dense poorly graded sand with silt (SP-SM) to thirty four (34) feet below grade. Interbedded sandy silt and poorly ( graded sand with silt (ML and SP-SM) was encountered bet,+veen thirty four (34) and I forty (40) feet where hard clay (CL) was encountered. � � E�rth Conwlunh,loc. � 2Q L