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RE7.A. - Page 433 Expansion Project#:11637.0 Auyus�v,�v�� Page 18 As summarized in Figure 7, the retail center parking lot in total was 66% occupied during the weekend peak period and the Costco-specific parking was 73% occupied. The occupancy rate varied by zone within the site. As expected, the parking spaces closest to the Costco warehouse entrance (Zones 3, 4, and 6) were more heavily occupied, while the spaces in the far corners of the parking lot had lower utilization. Zones 3, 4, and 6, which are located nearest the Costco warehouse entrance, were the most heavily utilized with over 95% average utilization during the weekend peak period. The parking on the remainder of the site had much lower utilization, with over 350 vacant spaces available overall and over 200 vacant Costco-specific spaces during the weekend peak half hour period. In general,parking is considered to be "full"at approximately 90% occupancy, as described in the ITE Parking Generation Manual. This is to allow for ease of circulation, parking availability, and to account for variations in parking turn-over.Therefore, under existing conditions,the site operates well within the recommended parking supply buffers to allow for customer convenience and efficient on-site circulation. It also provides a significant margin for daily and seasonal fluctuations in parking demand, and accounts for flexibility in on-site circulation and maneuverability. As documented previously, the seasonal peak activity observed at the site (December 2010) was approximately 11% higher than that during the month when the parking data was collected (May 2011). Using this factor, the peak parking demand in December 2010 would be approximately 604 vehicles for the Costco parcel during the weekend peak half hour. This would equate to an occupancy rate of 81% on the Costco parcel which is still below the 90% occupancy rate for parking to be considered"full." Figure 8 summarizes the peak half hour of parking demand on site during the weekday p.m. peak period. As can be seen from Figure 8, parking demand was significantly lower during this time period with only 39%of the Costco parking supply occupied during the peak half hour. Effects of Proposed Fuel Station Expansion on Parking The concept site plan for the proposed expansion of the Costco Gasoline fuel station from three to five islands along with associated parking modifications shows a net parking supply loss of zero stalls. While some parking will be removed immediately adjacent to the fuel station to accommodate the additional fuel islands, the parking lost in that location will be made up by other parking modifications in Zones 3, 4, and 6. Given that there is sufficient parking on site today and no net loss of parking supply is proposed as part of the fuel station expansion, it can be concluded that there will still be sufficient parking on site to accommodate the typical and seasonal peak parking demands with an expanded fuel station in place. Kittelson&Associates,Inc. Boise,Idaho