An experienced developer engaged Cross Reiter to complete a comprehensive geotechnical engineering evaluation for this steeply sloping, 5-acre lot on Issaquah’s Cougar Mountain. We planned and executed a subsurface exploration program to characterize soil and groundwater conditions, completed geotechnical engineering analysis to support permitting, design, and construction, and authored a geotechnical engineering report that met King County requirements.

Cross Reiter provided geotechnical design and construction recommendations for key project elements, including a major cast-in-place concrete basement wall, shallow spread footings to support the structure, and rockeries to permanently stabilize proposed cut slopes needed for the driveway. Cross Reiter completed numerical slope stability analyses to justify a reduced slope setback in accordance with King County Code.

Cross Reiter was able to complete their subsurface explorations within one week of contract execution, and delivered their geotechnical engineering report within one week of the field exploration program. Our geotechnical recommendations ensured the project will not impact the steep slope hazards at the site, or vice versa. Our comprehensive but easy-to-understand geotechnical engineering report facilitated an efficient permitting process for the project.