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I <br /> 1 Submittals and Design Requirements <br /> I <br /> 2 Excavations 4-feet and less in height do not require design and submittals.The Contractor <br /> 3 shall provide a safe work environment and shall execute the work in a manner that does <br /> 4 not damage adjacent pavements, utilities, or structures. If the Engineer determines the <br /> I <br /> 5 Contractor's work may potentially affect adjacent traffic, pavements, utilities, or structures, <br /> 6 the Engineer may request a Type 1 Working Drawing from the Contractor.The Contractor <br /> 7 shall explain in the Type 1 Working Drawing how the Engineer's concerns will be <br /> 8 addressed, why infrastructure will not be damaged by the work, and how worker safety <br /> I <br /> 9 will be preserved. <br /> 10 <br /> 11 For excavations that have soil types and slope geometries defined in WAC 296-155 part I 12 N and are between 4-feet and 20-feet in height, the Contractor shall submit Type 2 <br /> 13 Working Drawings. Required submittal elements include, at a minimum, the following: <br /> 14 <br /> I <br /> 15 1. A plan view showing the limits of the excavation and its relationship to traffic, <br /> 16 structures, utilities and other pertinent project elements. If the stability of the <br /> 17 excavation requires no-load zones or equipment setback distances, those shall <br /> 18 be shown on the plan view. I 19 <br /> 20 2. A typical or controlling cross section showing the proposed excavation, original <br /> 21 ground line, and locations of traffic, existing structures, utilities, site constraints, I 22 surcharge loads, or other conditions that could affect the stability of the slope. If <br /> 23 the stability of the excavation requires no-load zones or equipment setback <br /> 24 distances, those shall be shown in cross section. <br /> 25 <br /> 26 3. A summary clearly describing subsurface conditions, soil type for WAC 296-155 <br /> 27 part N, and groundwater conditions, sequencing considerations, and governing <br /> 28 assumptions. I 29 <br /> 30 Where WAC 296-155 part N requires an engineer's design, the Contractor shall submit <br /> 31 Type 2E Working Drawings. Required submittal elements include, at a minimum, the three I 32 items above and the following additional items: <br /> 33 <br /> 34 4. Supporting calculations for the design of the excavation, the soil and material <br /> I <br /> 35 properties selected for design, and the justification for the selection for those <br /> 36 properties, in accordance with the WSDOT Geotechnical Design Manual M 46- <br /> 37 03. <br /> 38 <br /> 39 5. Safety factors. or load and resistance factors used, and justification for their <br /> 40 selection. in accordance with the WSDOT Geotechnical Design Manual M 46- <br /> 41 03, and referenced AASHTO design manuals. , <br /> 42 <br /> 43 6. A monitoring plan to evaluate the excavation performance throughout its <br /> 44 design life. <br /> I <br /> 45 <br /> 46 7. Any supplemental subsurface explorations made by the Contractor to meet the <br /> 47 requirements for geotechnical design of excavation slopes, in accordance with <br /> 48 the WSDOT Geotechnical Design Manual M 46-03. I <br /> 49 <br /> 50 2-09.3(3)D Shoring and Cofferdams <br /> 51 The first sentence of the sixth paragraph is revised to read: I 52 <br /> CITY OF EVERETT AMENDMENTS I <br /> PACIFIC AVENUE TO INTERURBAN TRAIL BICYCLE SAFETY PROJECT 8/12/2019 <br /> STATE FUND#HLP PB17(014); COE#PW3688 Page AM-12 <br />