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4702 R'Glenhaven Drive CAO,Snohumish CountJ�,Washin;ton Materi�ils Testing& Consulting,Inc. <br /> Jul�� 31. 2017 I(rB031) <br /> 2. Minimize the volume and velocit�� of water that travels toward and down the slope face (via <br /> proper choice of site development features including stormwater controls discussed above). <br /> 3. Avoid accelerating slope erosion and mass wasting due to human activity such as: <br /> a) Adding side-cast debris to the slopes <br /> b) Using hea�ry construction equipment on or near steep slopes <br /> c) Excavating near adjacent steep slopes toe or on slope face <br /> d) Placing exca�ated soil near the steep slope crest <br /> 4. Prior to construction, a silt fence and/or a co�utinuous line of straw bales should be placed on the <br /> slopeward edge of the construction area. Heavy construction equipment, construction materials, <br /> or native and imported soils should not be p9aced behind the erosion control devices. Suitable <br /> temporary erosion and sediment control meas�rres should be implemented at the construction site <br /> during and immediately after ground disturb�nce occurs. Temporary areas bare of vegetation <br /> should be protected from erosion via a blanket of straw or rolled erosion control product (RECP) <br /> during prolonged breaks in site work and prior to reseeding or revegetation. <br /> 5. At the end of the project, all disturbed vegetation should be repaired and maintained utttil it is <br /> established. Concentrated surface water should not be allowed to traverse the slope during or <br /> after the construction phase of the project. Roof downspouts and footing drains should be routed <br /> into closed separate pipes which outfall into appropriate drainages. Outlets for these pipes should <br /> be protected from erosion through the use oiF rip-rap ar some other energy dissipating device. <br /> Similarly, concentrated drainages should be captured in closed pipe systems and routed down <br /> slope to appropriate outfalls. <br /> 6. Clearing of existing vegetation outside the proposed building area on and adjacent to the existing <br /> slopes should be avoided except as approved by a qualified professional. This provides additional <br /> stability to the loose top soil and minimizes the effects of down-slope water movement. This is <br /> eYcepting removal of dead or dying trees if posing a direct hazard to site installations or adjacent <br /> roadways. <br /> 7. Grading or excavation of soils during construc�ion should be accompanied by grass reseeding and <br /> re-vegetation as the project is completed. According to "vegetation Munu�rement: A Guide for <br /> Puget Sounc�Bluff�Property Owners" (Manashe, 1993) the following types of vegetation provide <br /> �ood to excellent erosion control. <br /> s <br />