Agenda - Planning Commission - 08/01/2013

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FACT SHEET 3: Mitigated Data Center Concept Map Upon receiving feedback from the public open house process, the City revised and updated the proposed data center site concept maps. The purpose of revising the proposed site maps was to respond to inquiries/concerns raised by surrounding property owners; and to provide the City Council with a 'mitigated' version of the data center site concepts. In summary the revised site concept gaps include the fall wiing changes: • Establishment of public open space (programming to be determined) • Increased building setbacks from 125' to 200' (175' on eastern property line) • Establishment of noise restrictions (55 decibels maximum). 55cEB is often compared to office noise, normal conversation, living room in suburban area, typical business office, library, moderate sound and a quiet house. • Requirement to enclose all generators, mechanical equipment, water tanks, etc. • Requirement to place all air conditioning units near the center- of buildings • Maximum building height, 25' clear ceilings • Required screening: berming, plantings, larger setbacks, • Required quality building materials/design • City confirmation of various details: o One data center (regardless of size) will employ an estimated 8-12 people. Therefore two data centers will employ an estimated 16-24 people total. o A data center development will create an estimated 48 vehicle trips per day to Nowthen Boulevard only; versus a residential development (estimated 480 vehicle trips per day to Helium Street). o Data centers are a 24/7 operation. However, data centers do not warrant full staffing on site during nights and weekends. Typically, there may only be one person an site during nights and weekends (inside of building)_ o Data center generators do not run 24/7. Generators run I-2 times per month for testing. Additionally, generators are turned on for severe weather events.