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<br />3 <br /> <br />3. Updated survey and CADD deliverable to reflect additional potholing information provided by <br />the City and pothole locations marked in the field. This update will be in the electronic <br />deliverable from the surveyor to HDR and incorporated into the final design drawings. <br />Task 300 Geotechnical Engineering Services <br />Objective <br />The objective of Task 300 is to provide additional services to support final design. <br />Consultant Services <br />HWA GeoSciences, Inc. (HWA) is being retained as a subconsultant to provide the following <br />services under Task 300: <br />1. As the design team evaluates the preferred cost-effective approach to retaining walls on <br />both the west and east sides of the site supporting 1st Avenue and the new maintenance <br />access road, provide geotechnical engineering analysis for retaining wall options under <br />consideration. <br />2. Provide maintenance access road design support: <br />A. Develop a plan and coordinate a field exploration program for dynamic cone penetration <br />(DCP) testing and hand auger borings <br />B. Conduct public and private utility locates and conduct DCP testing and hand auger <br />borings <br />C. Revise the stability analysis for the maintenance access road <br />D. Provide recommendations for road design with consideration of driving a fully loaded <br />eductor truck along the road for performing maintenance of the stormwater facilities <br />3. Utilizing the trench and excavation dewatering recommendations already completed, <br />develop a dewatering memorandum for internal use by the City for the purpose of estimating <br />dewatering rates and costs and updating the specifications <br />4. Conduct up to two days of field observations during potholing to inform the geotechnical <br />report <br />5. Incorporate the information above in the final geotechnical report <br />City Responsibilities <br />The City is responsible for the following activities under Task 300: <br />1. Notify Consultant of planned additional potholing <br />Assumptions <br />The following was assumed for Task 300: <br />1. Up to 2 days (16 hours plus travel expenses) of field observations during potholing