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1 Pr�oject�escri�tion <br /> bulldozer,and a small truck. Assuming the use of 12-cubic yard dump txucks, the removaZ of <br /> excavated materials associated with the pedestrian undercrossing would result in o�Ter 196 truck <br /> trips, at an average of 20 da.i�y truck trips during this phase of the project. Prelin��arp testing <br /> indicates that the soils can be classified as CZass II "designated"nonhazardous wastes,which can be <br /> disposed of at landfills permitted to accept these wastes. Soi�s within the project area consist <br /> ptimarily of Young and Old Bay Mud. P�or to disposal o�the excavated soil,aadi�iona�soil <br /> sampling and testing would occux to deterniuie if liquid cancentrations would be released during <br /> dasposal. When necessary, the contractor would spread Bay Mud soils in rows to dry or mixed them <br /> with other excavated soils on site so that the transported materials would meet the landfill disposal <br /> criteria. <br /> A tieback retaining wall would be instalZed along the face of the existing north side abutment in <br /> order to maintain the integxity of the bridge support and roadwap embankment. This rieback <br /> retaining wall would utilize horizontal tiebacks approxi�nately 30-feet long that would be suppo�ted <br /> by rieback anchors iocated between the existing abutment piles. Crews wouJd use a small drilt <br /> machine to install the riebacks because of the limited headroom and working space. Spoils from the <br /> drilling operation would be removed and disposed of off-site. The driIled holes would be filled with <br /> cement grout. Approximately 80 cubic yaras of shotcrete would be neeaed for the tieback wall. <br /> After installation of the tie-back tetaining wall, crews would excavate the creek bank and drive in <br /> micro-piles to support the concrete path aiong with the creek-side retainitag waU.. Approxunately <br /> 44 micro-piles extending up to 30-feet deep may be needed to pxoti�ide vertical support of the path. <br /> Once the micro-piles are in place, detention drainage pipes, drain inlets, and discharge pipes to the <br /> cteek would be installed. Finally, the slab footing of the path would be constructed alang with the <br /> creek-side wal�. <br /> Crews would perform electrical work fox the pedestrian lighting and installation of the access gates <br /> and call boxes aftex the concrete work under the bridge is complete. Landscape walls and the <br /> pedestrian sidewalk would be consttucted,and aIl landscaping can be dane to resto�e the area near <br /> the bridge. <br /> The work in tl�e City-owned parcel would involve inuiunal clearing and g�ubbing as well as some <br /> ro�xgh grading. The sidewalk anc�joint-use path would be installed along with the landscape trees, <br /> pedestrian streedights,and the scenic overlook area. I��inimallandscaping would be needed to <br /> restore the site. <br /> 1.5.3 Project Schedule <br /> Constxuction of the storm drain pump station would take appro�nately 120 working days, from <br /> January 2014 to June 2014. Construction af the US 101 pedestrian undercrossing wauld take <br /> approxirnately 150 working days, from June 2014 to December 2014. Weekday construction hours <br /> would be limited to 7:30 am to 4:00 prn,Monday through Friday,excluding City-recognized <br /> holida�s. <br /> 1-8 US 109 Pedestrian Undercro,rsfngand <br /> Bairlsland Storrra Drain Pu�np Station Project <br />