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Earth Mechanics, Inc. <br />Principal Elements: (1) EMI conducted survey of existing pavements <br />surface to observe and record the condition of the pavement, including <br />the type, extent, and degree of distress; (2) EMI conducted <br />geotechnical investigations; (2) soil testing to characterize soils; (3)� <br />estimated engineering properties of soils; (4) performed pavement <br />design using Caltrans Software CaIME; (5) prepared Materials Report., <br />Special Features: Visual Pavement Condition Survey; Pavement <br />rehabilitation includes mill and overlay; Using CaIME software to design asphalt pavement <br />structural sections. <br />OCPW, Santa Ana River Bikeway and Trail, <br />Orange, Riverside & San Bernardino Counties, CA <br />Reference <br />OCPW <br />Prime Reference: Michael Baker <br />International <br />Ray Wang, PE, Senior Project Manager <br />(949) 330-4293 <br />ray.wang@mbakerintl.com <br />Contract Details <br />EMI Fee: $187,000 <br />Dates: 2018 to 2022 <br />Key Staff: Andrew <br />Korkos, Michael <br />Hoshiyama <br />Relevance <br />• Subsurface geotechnical <br />investigation <br />• Soil classifications and <br />analysis <br />• Foundation design <br />• Retaining structures <br />• Stability of slopes under <br />static and seismic conditions <br />• Required Army Corps of <br />Engineers coordination <br />A geotechnical study was conducted by EMI for three proposed bridges and associated <br />retaining walls that are part of the Santa Ana River Trail Parkway Extension Project. The project <br />involved designing pedestrian/cycling trail improvements between Gypsum Canyon Road and <br />the Orange County boundary (adjacent to Green Hills Golf Course). The three bridges include <br />one single -span bridge crossing a small drainage channel, and two longer, two -span bridges <br />spanning the Santa Ana River. Retaining walls are proposed as part of the bridge approach <br />embankments. Improvements also include drainage structures, trail surface/paving, trail signs, <br />and landscaping. <br />Principal Elements: (1) EMI conducted the geotechnical field <br />investigation and laboratory soil testing to characterize soils at <br />the bridge locations; (2) estimated engineering properties of <br />soils including strength, compressibility, and density; (3) <br />performed analyses to evaluate soil liquefaction, seismically - <br />induced settlement, axial and lateral capacity of deep <br />foundations supporting the bridge structures, stability of retaining <br />walls and channel slopes under static and seismic conditions, <br />bearing capacity and static settlement for spread footings, and <br />lateral earth pressures for walls; (4) prepared foundation report; and (5) reviewed project plans <br />and specifications. <br />Special Features: Bridge foundation design followed LRFD methodology and considered scour <br />potential; the bridges are close to the Elsinore Fault Zone and subject to high ground <br />accelerations; one bridge requires constructing the foundation behind an existing anchored <br />sheet pile wall. <br />Proposal (RFP No. 23-123) City of Santa Ana <br />On -Call Geotechnical Engineering Services <br />