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TASK 4 GEOTECHNICAL ENGINEERING ANALYSIS & REPORT <br />The geotechnical scope and cost estimate assumes the replacement culvert/bridge for Story Creek and <br />Residential Culvert Crossings #1 and #2 will be less than 20-foot-span structures and will not require <br />seismic hazard evaluation for the structure/foundations, and will be supported on shallow foundations. <br />The replacement bridge for Lick Creek project is assumed to have a single-span up to about 80 feet long <br />and will be subject to AASHTO and WSDOT bridge design specifications with seismic hazard evaluation, <br />and could be supported on shallow foundations or pile foundations. <br />A geotechnical report will be produced for Story Creek Project. One geotechnical report will be <br />produced to encompass the Lick Creek and Residential Culvert Crossing #1 and #2 Site projects because <br />the Sites are in proximity with anticipated similar subsurface conditions and geotechnical <br />considerations. <br />TASK 4.1-Storey Creek <br />1. Analyze collected field investigation data to characterize the geotechnical properties of the <br />subsurface. <br />2. Evaluate and provide design/construction recommendations for temporary excavations, and <br />construction dewatering, if needed. <br />3. Provide lateral earth pressures for design any wing walls or abutment walls. <br />4. Evaluate and provide shallow foundation bearing and lateral resistance geotechnical design <br />parameters and construction considerations. <br />5. Evaluate overall stability of approach embankment immediately adjacent the culvert . <br />6. Provide grain size analysis results of bank and channel material for use in scour analysis. <br />Scour analysis to be completed by Hydraulics Engineer. <br />7. Participate in up to two, one hour design team meetings by phone to discuss geotechnical <br />design and construction elements of the project. <br />8. Provide up to 4 hours of Plans and Specifications support throughout the project. <br />9. Deliverables: <br />9.1. One (1) Draft Geotechnical Report <br />9.2. One (1) Final Geotechnical Report. To be delivered after CONSULTANT receives one (1) <br />set of Owner's comments. Owner shall combine all comments to one (1) document and <br />submit to CONSULTANT. <br />TASK 4.2 -Lick Creek <br />1. Analyze collected field investigation data to characterize the geotechnical properties of the <br />subsurface. <br />2. Determine seismicity, seismic ground motions, and identify seismic hazards for Lick Creek Site . <br />3. Evaluate and provide design/construction recommendations for temporary excavations, and <br />construction dewatering, if needed. <br />4. Provide lateral earth pressures for design of any wing walls or abutment walls.