DRAFT <br />understand the abutment columns will be supported by mat foundations that may be <br />equipped with ground anchors to resist uplift loading. <br />Information regarding the planned type and configuration of the separate three-story <br />weight room/lounge building is currently unavailable. However, we understand maximum <br />columns loads for the building will be on the order of 300 kips of dead load, 300 kips of <br />live load, and 75 kips of lateral load and will likely be supported by conventional spread <br />footings. <br />We understand the project will be designed in accordance with the 2019 Oregon Structural <br />Specialty Code (OSSC). Seismic design in accordance with the 2019 OSSC is based on the <br />American Society of Civil Engineers (ASCE) 7-16 Document, Minimum Design Loads and <br />Associated Criteria for Buildings and Other Structures (ASCE 7-16). Anticipated seismic <br />loading and performance criteria for the new structures are currently unavailable. <br />3 SITE DESCRIPTION <br />3.1 General <br />The site of the proposed facility is bounded by Leo Harris Parkway to the south and west, <br />Martin Luther King Jr. Boulevard to the north, and the existing Hatfield-Dowlin Complex <br />to the east. The site is currently occupied by natural and synthetic turf outdoor practice <br />fields, areas of landscaping and walkways, and maintenance facilities. Our review of <br />available topographic information and our experience at the site indicate the ground <br />surface in the existing field areas is relatively flat and near elevation 412 feet (National <br />Geodetic Vertical Datum of 1929 [NGVD 291). The ground surface surrounding the site is <br />generally above field grades, and landscape berms and/or retaining walls up to about 15 <br />feet tall separate the fields from the surrounding areas. <br />3.2 Geology <br />The results of this investigation and our experience in the project area indicate the site is <br />typically mantled with alluvial gravel and cobbles that contain varying amounts of sand <br />and silt. The alluvium is underlain by highly variable sand, gravel, silt, and clay soils that <br />are derived from the weathering and decomposition of volcanic mudstone. These soils are <br />underlain by predominantly silt and clay soils derived from the weathering and <br />decomposition of sedimentary rock of the Eugene Formation that is present at greater <br />depths. Our experience and review of available subsurface information for the project area <br />indicates the depth to bedrock at the site is likely on the order of 150 feet to 250 feet. <br />4 SUBSURFACE CONDITIONS <br />4.1 General <br />Subsurface materials and conditions at the site were evaluated between March 24 and July <br />8, 2021, with 11 borings, designated B-1 through B-11, and three cone penetration test <br />GRI #6497-A - 2.MO Indoor Football Practice Facility Page 2 <br />August 26, 2021 <br />