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<br />TETRATECH Mike Olsen, PE
<br />Structural Project Engineer
<br />many challenges. Mr. Olsen helped in the shop drawings review process and structural observations in the construction
<br />phase.
<br />McBean Parkway Pedestrian Bridge Construction Support, City of Santa Clarita, Santa Clarita, CA. 2016 — 2017.
<br />Project Engineer. Project Engineer during the design and construction phase of the project. The City of Santa Clarita
<br />contracted Tetra Tech in 2015 to perform planning, structural design, and construction phase services to replace the existing
<br />pedestrian overcrossing (POC) over McBean Parkway. The POC is located on the City's network of multi -use "paseo"
<br />pathways. Constructed in 1979, the timber superstructure showed signs of insect infestation, dry rot, and delamination of
<br />the glue laminated girders. The project team was tasked with defining an approach to replace the decaying structure. Tetra
<br />Tech initiated the geotechnical investigation and preparation of structural plans, specifications, and estimates to replace the
<br />structure. Through continued partnership, Tetra Tech and City engineers delivered a project within cost that increases safety
<br />and restores alternative access to schools, neighborhood parks, and local businesses in the City of Santa Clarita.
<br />Construction commenced in spring of 2017 and was completed later that summer. The biggest challenge encountered was
<br />the coordination and scheduling of road closures during the demolition of the existing bridge and during final assembly and
<br />erection of the new pre -fabricated bridge Tetra Tech's experience in the preparation of traffic control plans within the City
<br />helped minimize the impact to the public and allowed the contractor do perform all construction related tasks.
<br />Riverside Drive near Zoo Drive Bridge over Los Angeles River, Bridge No. 53C-1298, City of Los Angeles, CA. 2014
<br />— Ongoing. Design and Construction Support. Responsible for conducting plan reviews and approvals by Caltrans District 7
<br />and the Federal Highway Administration (FHWA) for this federally funded project. With this historic bridge falling below
<br />current design standards, Tetra Tech was contracted for the completion of environmental documentation and permitting,
<br />geotechnical and hydraulic analyses, bridge widening and retrofit, traffic and lighting upgrades, and 100% Plans,
<br />Specifications, and Estimates (PS&E), in an effort to fix geometric deficiencies, barrier rail vulnerabilities, structural
<br />weaknesses, and Los Angeles River Bicycle Lane impedance issues.
<br />Construction of Lost Canyon Road Bridge Widening over Sand Canyon Wash, Santa Clarita, CA. 2015 — 2016.
<br />Project Engineer for the construction phase and services portion of the bridge widening at Lost Canyon Road. The bridge
<br />widening was originally designed by DCA and Tetra Tech was contracted to provide construction engineering including
<br />surveying, material testing, and biological monitoring to assist City's project team. The goal of the project was to create a
<br />multi -use pedestrian and bicycle path along the north edge of the existing bridge approximately 10-feet wide. The proposed
<br />bridge expansion is 50-feet long by 16-feet wide and was constructed similar to the existing structure with the addition of
<br />four PS/PC concrete box girders, extending the existing abutments and repositioning the wing walls on the downstream
<br />side. Construction of the bridge structure and road surface was conducted primarily from the top, however, equipment and
<br />materials were needed to access the wash for the purpose of grading and constructing the abutments, scour protection slab,
<br />and repositioning the wing walls. Mr. Olsen was responsible for attending weekly construction meetings, performing
<br />structural observations, reviewing and responding to BFI's and Submittal's, Design Bulletins for Contractor regarding
<br />design clarifications, preparing and performing Final Inspection and preparing Record Drawings.
<br />Conveyance Pipeline for Carlsbad 50 MGD Seawater Desalination Plant, Poseidon Resources Corporation,
<br />Carlsbad, CA. 2013 — 2014. Design Engineer for several structures associated with the interconnection of the new 54-inch
<br />diameter Carlsbad Conveyance Pipeline with the existing SDCWA P3 and P4 pipelines. The four structures are buried
<br />reinforced concrete vaults that consist of two pump wells, two isolation valve vaults, an interconnect valve vault and a flow
<br />control facility. The flow control facility vault has an above -grade concrete masonry control room, with a steel framed roof
<br />built on top of it.
<br />Export Sludge Design/Build Project, South Orange County Water Authority (SDCWA), Laguna Niguel, CA. 2013.
<br />Structural Design Engineer. Responsible for providing design and construction support for this design/build project. This
<br />project consisted of three main structures: the sludge equalization tank, the pump station, and the electrical building. The
<br />sludge equalization tank is a 40-foot diameter, 26-feet deep, conventionally reinforced cylindrical tank whose design
<br />conforms to ACI 350. The pump station is an open concrete enclosure, surrounded on three sides by 4-foot high concrete
<br />walls. The electrical building is a masonry building with a steel framed roof.
<br />Brackish Groundwater Desalination Reverse Osmosis Water Treatment Plant, San Antonio Water System (SAWS),
<br />San Antonio, TX. 2013. Design Engineer. Responsible for the structural design, plans, and specifications for post
<br />treatment structures of SAWS' brackish groundwater treatment plant. The structures included a cast -in -place reinforced
<br />concrete chlorine contact tank, chemical storage building and electrical room with masonry walls and steel framed roof,
<br />finished water pump station, calcite contactors foundation and structural steel access platforms, steel flush tank foundation,
<br />and carbon dioxide storage tank foundations. Foundation design of all structures incorporated geotechnical
<br />recommendations to mitigate the effects of expansive native clayey soils.
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