Development Team Meeting Notes (96-99)

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than by assigning spaces. It could provide benefit for marketing of the retail/off ce space in the ~ building with 3/1,000 parking or actually having 4/1,000 to utilize. Melvin Mark has studies to provide backup information on operating parking garages in this fashion and maximizing its use. On this method you would be looking at a worst case scenario of $600 / month. County is not opposed to how it is enforced, but we would have to make changes in current County policy, habits, etc. before we could commit to this approach. It would not be a simple process to make the change. Leonard and Dave had the opportunity to recheck the efficiency ratings for past designs. The old scheme of 425+ stalls with the good efficiency rating, did not have a gpod circulation pattern. Both designs (425-27 stalls) were based on 30' structural grid. The newest design includes added storage rooms, maintenance equipment storage. Dave's esti~nate from last week was based on the 377 stalls. There would be a$344,000 increase abo~e and beyond digging and backfilling to add the 48-50 spaces to this plan. The price per stall at 365 efficiency rating would be $11,721. The 377 stall plan is on the Chevron site. Dan Berrey added that putting in the additional 50 stalls will have some positive influence. `1Ve are looking at 5.75% interest and 2% annual increase on COP's for fmancing. Clarificatior~ was made on whether we would excavate and then backfill with clean soil or just excavate for the parking structure. Mike Hafford, the structural engineer, has some concerns with the design. Pence Kelly has a copy of plans from the state 's underground garage built a few years ago. Thay do not have water proofing, just a 5" slab with #4 rebar on 16" centers and a typical drainage ;system. Plus they had a"gift" with storm sewer access to Mill Creek for de-watering. Concetns on our site include keeping water levels down, hydrostatic pressure and keeping costs down to deal with de- watering issue. We are still looking at other options. The groundwater level is between 11-17 feet underground and can vary on location. Centurywest has received a bid from a subcontractor, GRI to complete the pump tests that are required to find out what we will be looking at to determine how we can handle the de-watering package. The question is who will they be working for? Centurywest has had discussions with Mike Hafford as well and agree that pump tests aze necessary for the de-wat~ring plan and we need to go forward. Estimates from GRI state they could not be available to start for another two weeks. Discussions followed regarding volumes of water being pumped and if that water is contaminated, it needs to be treated. We have limited capacity on storm se~wers as well. We need to get calculated flow rates from the building, do the pump tests and at 1he same time look at testing the water. Melvin Mark and Centurywest will discuss this course of action further in a separate meeting. This data is essential to the decision we have to make regarding the parking structure and is now the critical issue at hand. GRI has stated that it will take two weeks to complete testing from time they start. They need ~' Page 2 of 5