21 ATTACHMENT 6 AND 7 - Laserfiche WebLink

The noise study stated that the ambient noise from the activities at the fairgrounds during the fair would, during a worst -case situation, reach 57 dB Ldp, meeting the General Plan exterior noise requirements. Staff has included a condition requiring disclosure to future homeowners of the activities at the fairgrounds. Driving Range Golf Ball Trajectory Study The project site is approximately 390 feet from the tees at the driving range and golf balls have been landing on the western portion of the project site. To protect the proposed residential development from being hit by golf balls from the driving range, a fence /net structure to block the balls would need to be erected. A golf ball trajectory study was prepared by Tanner Consulting Group (TCG), attached as Exhibit B. TCG completed a statistical study of golf ball trajectories at the current tee location as well as at the range landing area. The study includes four golf ball fence /net structure design options with golf ball fence /net heights at 135 feet (Options 1 and 2), 45 feet (Option 3), and 80 feet (Option 4) based on the net location. Option 3 is proposed by the applicant (and is the option supported by staff) because it would be the least visually- obtrusive option. Option 3 entails delaying construction of Lots 17 -19 and constructing a 45 -foot tall golf ball fence /net structure behind Lots 14 -16. The construction of Lots 17 -19 would be delayed until the operation of the driving range at the fairgrounds ceases in approximately 18 years. To mitigate the visual impacts of the net, the applicant proposes to install screen trees near the rear property lines of Lots 14 -16 (on future Lot 17) with a minimum size of 15 gallons. The golf ball fence /net structure will be constructed by the applicant and maintained by the applicant and its agent. The screen trees will be planted by the applicant and maintained by the HOA until Lots 17 -19 are constructed. When the operation of the driving range ceases, the applicant or future developer will remove the fence /net structure. As the planted screen trees would be located on Lot 17, the owner(s) of Lot 17 could decide either to retain or remove the screen trees subject to the heritage tree requirement, if applicable. The development's HOA would no longer be responsible for the maintenance of these trees. Figure 4 shows the locations of the golf ball fence /net structure (Option 3) and screen trees. Visual simulations from three viewpoints were prepared to assess the visibility of the netting. The visuals were prepared with the screen trees. The visuals show that the netting could be seen from areas on the north side of the arroyo, from Rose Avenue, and remotely from Valley Avenue. The appearance of the netting would be similar to that of the existing netting at the City's Callippe Preserve Golf Course. The visual simulations are attached in Exhibit B. PUD -99 Planning Commission 11