Laserfiche WebLink
4 . � <br />' . <br /> Seahorse R?staurant <br /> 18 March 1988 W-5583 <br /> Page 4 <br /> episodes. These soils' high densities reflect the compressive effect cf the weight <br /> of the thick glacial ice mass. Test pits excavated on the site revealed surficial <br /> topsoils immediately underizin by medium dense, weathered glacial materials or <br /> post-glacial materials mantling deeper deposits of dense to very dense unweathered <br /> glacially overridden soils. Generaily, from 1/2 to 1 foot of topsoil was observed <br /> with dense to very dense unweathered glacially derived silty sands with gravel , <br /> encountered at depths ranging from 1 to 3 feet below the existing ground surface. <br /> Approximately 1-1/2 feet of uncontrelled man-made fill was encountered in test <br /> i pit TP-4. This fi11 consisted of bottles� cans and other organic debris surrounded <br /> by a matrix of soft, sandy silt soils. <br /> Light to heavy ground water inflow was observed in test pits TP-4, TN-5 and TP-6. <br /> Genera?ly, ground water inflow entered the test its t <br /> P hrou h <br /> g the weath r <br /> . e ed <br /> or ost- 9lacial <br /> P glacial mat <br /> erials encountered b <br /> elow t <br /> • relatively impermeable nature of the dense to every Sdensehounweatherede glacial <br /> materials encountered at depth, this water is interpreted to be "perched". Due <br /> to the close proximity of Silver Lake, this type of ground water inflow should be <br /> considered as a permanent perched condition and the quantity and duration of flow <br /> should be considered consistent. Ground water conditions across the site may vary <br /> seasonally due to changes in site utilization, precipitation and other factors. <br /> We anticipate that heavier ground water inflows will occur for excavations <br /> approaching the shoreline. <br /> CONCLUSIONS AND RECOt41ENDATIONS <br /> Development plans ca11 for a construction of a lightly-loaded, one-story restaurant <br /> and a one- to two-story office complex. Also included in the development would <br /> be parking, drives, land�caping and a concrete shore walkway. In our opinion, the <br /> development as Froposed is feasibie from a geotechnical standpoint, utilizing <br /> conventional spread footings, continuous wall footings and slab-on-grade floor <br /> suppart. <br />