Laserfiche WebLink
4 <br />Road. The existing home in that area also appears to be protected with that set <br />back. <br />The setback, as determined from borehole #4 and #i3, for the northwestern border <br />is 31'. It appears that only fences are located in that area on the adjacent sites. <br />Therefore limited consideration is deemed appropriate. Exhibit 20 shows that this <br />setback is currently 30'. This setback should be changed to 35'. <br />The setback, as determined from borehole #4 and #9, for the western border on the <br />northern end is 35'. It appears that only fences are located in that area on the <br />adjacent site. Therefore limited consideration is deemed appropriate. Exhibit 20 <br />shows that this setback is currently 50'. <br />The setback, as determined from borehole #3 and #10, for the border adjacent to <br />the 12" water main and sanitary sewer main is 60'. These public utilities should be <br />given additional consideration. Exhibit 22 shows that this setback is currently 75' <br />for the sewer line. This setback includes the berm slope and is adequate. The <br />setback between the 12" water main and the limit of excavation is somewhat less <br />than 75'. This setback which includes the berm slope and appears to be adequate. <br />The setback, as determined from boreholes #1, #2, #6 and #7, for the border <br />adjacent to the sanitary sewer main between extraction area B and C is 40'. Exhibit <br />22 shows that this setback is currently 75' for the sewer line -including the berm. <br />This setback is more than adequate. <br />The remaining setbacks on the southern half of the project are at least 30' and <br />appear to be satisfactory as based on boreholes #1, #2, #6 and #7 (Exhibit 22 and <br />23). <br />Discussion of Soil•Properties <br />A. General Site Characteristics <br />1. Soil Classifications: The overburden soil located over the river cobble that <br />is proposed to be mined is a silty clay with an ASTM classification of "CL". <br />The typical properties for this sample are as follows: <br />LL=40 <br />PL=20 <br />PI = 20 <br />Passing 200 -sieve =more than 90% <br />Cohesion: 500 psf with moderate moisture content <br />Density: 110 pcf with moderate moisture content <br />