DRAFT <br />structures will be designed to limit total foundation settlements to about 1 inch. If larger <br />settlements are considered tolerable for the new structures, higher allowable bearing <br />pressures could be considered for design. As an alternative to shallow foundation systems, <br />GRI can provide recommendations for deep foundation systems such as continuous flight <br />auger (CFA) piles, drilled shafts, or driven steel piles, if required. <br />Specific information regarding estimated structural loads and foundation design <br />requirements for the new structures is still being developed at this time. However, we <br />understand maximum column loads for the roof and shell structure will typically be on the <br />order of 275 kips of combined dead load and permanently applied live load. Similarly, <br />maximum column loads for the separate weight room/lounge building are anticipated to <br />be on the order of 600 kips of combined dead load and permanently applied live load. As <br />currently planned, individual columns for the practice facility will be supported by <br />conventional spread footings, with larger groups of columns being supported by mat <br />foundations. The use of ground anchors may be required to resist uplift loading on the <br />mat foundations. Foundation types for the building are currently being evaluated; <br />however, we anticipate conventional spread footings will be used to support the building <br />columns. <br />As previously discussed in this report, fill soils extending to a maximum depth of about 8 <br />feet were encountered in some locations at the site. In our opinion, these existing fill soils <br />may be suitable for support of field surfaces, building floor slabs, and hardscaped areas <br />but should not be used for foundation support. Therefore, all existing fill soils should be <br />removed from within the limits of new foundations following the recommendations <br />provided on Figure 3, and all new foundations established in the underlying gravel and <br />cobbles or structural fill placed over the gravel and cobbles. To provide uniform foundation <br />support and a working surface for construction, we recommend the gravel and cobbles <br />subgrade be capped with a minimum-4-inch-thick layer of relatively clean, compacted <br />crushed rock such as 1112- or 3/4-inch-minus crushed rock. As previously discussed in this <br />report, a thicker layer of crushed rock may be required during wet-weather or wet-ground <br />conditions, or if zones of gravel and cobbles with higher silt content are encountered. Prior <br />to placing the crushed rock, the gravel and cobbles subgrade should be evaluated by a <br />GRI representative, and the upper surface of the material compacted in-place as structural <br />fill following the recommendations provided in this report and under the observation of a <br />GRI representative. Any unsuitable materials encountered at subgrade elevation should be <br />removed and replaced with structural fill following the recommendations provided on <br />Figure 3. In this regard, it should be understood that the presence and thickness of fill soils <br />at the site are variable and not well known, and the actual required extents of fill removal <br />must be evaluated during construction by a GRI representative. <br />GRI #6497-A - 2.MO Indoor Football Practice Facility Page 13 <br />August 26, 2021 <br />