GeoEngineers 5/9/2016 - Laserfiche WebLink

EXHIBIT A— SCOPE OF SERVICES LAKE CHAPLAIN ROAD CULVERT AND EMBANKMENT REPLACEMENT PS&E PREPARATION NORTH OF SULTAN,WASHINGTON FILE NO.0661-107-00 INTRODUCTION GeoEngineers is pleased to present our scope of services to the City of Everett(City)to provide engineering design and permitting services in support of the embankment stabilization and culvert replacement project located on Lake Chaplain Road. Woods Lake Creek,a tributary to the Sultan River,flows through an existing corrugated metal pipe (CMP) culvert beneath the roadway. Our services are requested to advance the design from the current conceptual design alternatives through final design and permitting. Our understanding of this next phase of work is based on our discussions during meetings with the City for the conceptual design and our experience on similar projects. PROJECT UNDERSTANDING During the conceptual design, GeoEngineers evaluated the embankment stability and provided multiple alternatives to the City for culvert replacement to meet current fish passage requirements. The alternatives for the proposed culvert and road stabilization project are presented in in a technical memorandum and conceptual design drawings dated December 2, 2015. The City selected a preferred alternative (bottomless arch culvert)as outlined in their January 29 email. This next phase of work was requested by the City to complete additional feasibility review, and to advance the selected alternative to permit level designs,final design, and PS&E support. The detailed scope of work is provided below: SCOPE OF SERVICES The purpose of our services is to complete engineering and permitting services for the culvert replacement including advancing the conceptual design through PS&E. The City of Everett may opt to perform Tasks 2 and 3 in-house. We anticipate our services will include the following tasks: Task 1. Final Analyses and 30%Plans Preparation of Preferred Alternative Complete final engineering and analyses to develop 30% design plans for use in permit submittals. Plans will be developed per the City of Everett design standards. Our final engineering and analyses in preparation for development of the 30%design package will include: • Development of site access, roadway bypass, and staging locations. A temporary truck bypass must be maintained at all times during construction for access to the filtration plant. Design and construction will include measures to protect the existing 51-inch-diameter pipe where crossings are required. • Complete hydraulic analyses and evaluate potential scour. • Confirm shallow foundation design for the culvert including allowable soil bearing pressures. We assume the contractor will work with the vendor to complete the final structural design of the footing. GeoEngineers File No.0661-107-00