5114 33RD AVE W 2018-01-02 MF Import

Novack Property 99-11-10 51" Place Everett, Wa. Due to the characteristics of the soil on this site, we expect infiltration/run-off into any surficial drainage or utility trenches to be high during extended periods of wet weather. If drainage and/or utility systems are installed during these times, some pumping or other positive dewatering system might be needed within the trenches. If construction takes place during the dry season, we would expect that seepage into the trenches would decrease significantly. We anticipate that no dewatering of the utility trenches would be required during these periods. In planning the site grading and location for the residence, grades should be set so that water does not collect adjacent to the residence. Instead the ground should be sloped downward away from the structure so that runoff may be carried to a suitable discharge point. The base of all foundations and retaining walls should be protected from seepage or ground water by perforated pipe at the base elevation. The perforated drain pipe should be totally surrounded by at least 6 inches of washed gravel. This foundation drain system should be installed to discharge via tightline by gravity to an approved drainage system or tightlined down to the bottom of the slope. Roof and surface runoff should not discharge into the footing drain system. Instead, a separate tightlined drain system should be used and directed away from the building and tightlined to an approved drainage system. Additionally, any additional surface water that is generated by the construction of the proposed structure shall be directed into a drainage structure and tightlined into an approved system. It is very important to control the erosion on the sides of the site slopes. If erosion is allowed to happen, it could affect the stability of the slope, thus effecting the 19 GES, Inc.