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Recent Projects
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Conner Homes Company Bellevue, WA |
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Client: |
Conner Homes Company Bellevue, WA |
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Site Location: |
Green Lake Redevelopment Seattle,
WA |
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Services: |
Geotechnical
Environmental
Field Inspections |
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The project included redeveloping a two (2) acre property that included an apartment building, one-story retail and two former gasoline service stations. The redevelopment consisted of demolishing all existing structures and building a five story mixed-use building with two levels underground parking.
Environmental liability and business risk issues revolved around the site’s former ownership and uses including two gasoline service stations, shallow groundwater and several off-site contaminated properties. The project included a comprehensive Phase I ESA and Phase II site investigation, aquifer study, participating in buyer/seller negotiations and cleanup cost analysis. During construction, work included the permitting, field supervision, project management, and regulatory negotiations associated with the excavation of 3,400 tons of petroleum-contaminated soil and treatment and discharge of 500,000 gallons of contaminated water. Riley also performed the ACM/LCP building survey prior to building demolition.
Complete geotechnical engineering services included field exploration,
soil and groundwater characterization, shoring design, underpinning and
dewatering recommendations. Our inspectors/engineers performed the
construction monitoring services including excavation observations,
shoring installation observations, tieback testing, soft ground
improvement and the necessary engineering support and consulting required
during construction. |
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Stan Gregg |
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Architect: |
Weber Thompson |
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Site Location: |
Seattle, WA |
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Services: |
Geotechnical
Environmental |
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The proposed project includes redeveloping a 16,000 square foot lot currently occupied by Gregg’s Green Lake Cycle. The proposed redevelopment includes demolishing all existing structures and building a three to four story mixed-use building with two to three levels underground parking.
Environmental issues revolved around the site’s former use as a dry cleaners, shallow groundwater and several off-site contaminated or suspect properties. The project included a comprehensive Phase I ESA and Phase II site investigation, aquifer study, participating in owner/developer negotiations and cleanup cost analysis. Riley also performed the ACM/LCP building survey.
Complete geotechnical engineering services included field exploration, soil and groundwater characterization, shoring design, and dewatering recommendations. Riley is under contract to perform the soils inspection services and follow-up geotechnical engineering services during construction. Construction is anticipated to commence 2004. |
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Simpson Housing LP |
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Architect: |
Weber Thompson |
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Site Location: |
Lake Union, WA |
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Services: |
Geotechnical Engineering
Environmental |
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The project site includes a 1.66-acre developed site including a former gasoline service station/automobile repair garage and paint manufacturer. The redevelopment consisted of demolishing all existing structures and building a multi-story mixed-use building with two levels of underground parking.
Riley was contracted to provide complete environmental, geotechnical and ACM/LBP consulting services during the property acquisition, design, and construction phases.
Geotechnical services included providing foundation, tieback wall, soil nail wall and temporary groundwater dewatering recommendations. Riley’s geotechnical investigation was instrumental in obtaining a steep slope exemption from City of Seattle allowing the project to proceed.
Complex environmental liability and business risk issues revolved around the site’s former uses and known releases of petroleum hydrocarbons and paint solvents to subsurface soil and groundwater. The project included a comprehensive review of previous site and off-site environmental investigations and remedial actions and development cost analysis.
Riley is under contract to perform the field inspection services and follow-up environmental and geotechnical engineering services during construction which is scheduled to commence 2004. |
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Madison Development Group, Kirkland, WA |
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Architect: |
Sienna |
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Site Location: |
Madison, Seattle, WA |
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Services: |
Geotechnical
Environmental |
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The project site included performing the geotechnical and environmental evaluation of the former Planned Parenthood facility located at 23rd and Madison, Seattle, Washington. Project includes a high end mixed use multi-story building with two-levels underground parking. Geotechnical engineering services provided by Riley included field exploration, soil and groundwater characterization, and shoring design recommendations. |
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Madison Dev. Group |
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Architect: |
Sienna |
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Site Location: |
Queen Anne Hill Seattle |
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Services: |
Geotechnical
Environmental
Construction Monitoring |
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The project included performing the geotechnical and environmental evaluation of a new Seattle Mortgage facility for a high end mixed use multi-story building with two-levels underground parking. Environmental services included performing a Phase I ESA and Asbestos Building Demolition Survey. Geotechnical engineering services provided by Riley included field exploration, soil and groundwater characterization, and shoring design recommendations. Project near completion. |
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Planned Parenthood |
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Architect: |
Mithun Partners |

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Site Location: |
Seattle, WA |
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Services: |
Geotechnical
Environmental
Construction Monitoring |
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The project site included performing the geotechnical and environmental evaluation and design of the current Planned Parenthood facility located near 23rd and Madison, Seattle, Washington. The project included redeveloping a two (2) acre property that included a former gasoline service station (1928 to 1983), Seattle’s former cable car coal powered station (late 1800s-early 1900s) and lumber yard for the existing Planned Parenthood main regional headquarters and adjacent park.
Environmental liability and business risk issues revolved around the site’s former ownership and uses including one long-term gasoline service station and historic cable car power plant use. The project included a Phase I ESA, Phase II site investigation, air sparge/vapor extraction (AS/VES) remediation system design, installation and system operation and maintenance. Riley also performed the ACM/LCP building survey prior to building demolition.
Geotechnical engineering services included performing the field exploration, soil and groundwater characterization, deep foundation design, and dewatering recommendations. Our inspectors/engineers performed the construction monitoring services including excavation observations, auger cats pile installations and the necessary engineering support and consulting during construction. |
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Bob Gregg |
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Architect: |
Taylor Architects |
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Site Location: |
Edmonds, WA |
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Services: |
Geotechnical
Environmental |
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The scope of work included the geotechnical and environmental evaluation for the pending redevelopment. Project includes developing a former auto repair garage and restaurant located in downtown Edmonds.
Geotechnical engineering services provided by Riley included field exploration, soil and groundwater characterization, and shoring design recommendations. Environmental liability and business risk issues revolved around former site uses as an automobile service garage.
Riley is under contract to perform the field inspection services and follow-up engineering services during construction which is scheduled to commence 2004. |
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Jack Alhadeff |
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Architect: |
Bayliss Architects |
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Site Location: |
Renton, Washington |
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Services: |
Geotechnical
Environmental Wetlands |
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The scope of work included performing a preliminary wetland, detailed geotechnical investigation and environmental evaluation and cleanup of the property pending redevelopment. Project includes developing a 10 area parcel including several long-term auto repair garages (along Rainier Avenue) and a steep wooded slope/wetland area behind street frontage.
Geotechnical engineering services provided by Riley included field exploration, soil and groundwater characterization, and shoring design recommendations. Riley’s geotechnical investigation, including a detailed analysis of historic land use and origin of steep slopes and nearby landslides. Our geotechnical engineering slope stability analysis was instrumental in obtaining a steep slope exemption from City of Renton allowing development along the steep slope project to proceed to design and permit stage.
Wetland consulting to the current stage of this project included wetland delineation, classification and recommendations for intermediate and permanent control of noxious weeds.
Environmental liability and business risk issues revolved around former site uses as several automobile service garages and cleanup.
Riley is under contract to perform the field inspection services and follow-up engineering services during construction which is scheduled to commence 2004. |
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| Other Projects |
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Under Construction |
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