Site identification and evaluation for Cosmic Explorer

Cosmic Explorer (CE) is a proposed US next generation terrestrial gravitational-wave observatory. CE is currently in its design phase, with plans to begin operations in the 2030s together with the Einstein Telescope (ET) in Europe. CE's conceptual design consists of two widely separated L-shaped interferometers, one with 40km arms and one with 20km arms, each based on technology proven by the highly successful Laser Interferometer Gravitational Wave Observatory (LIGO). This order of magnitude upscaling on the 4km LIGO design presents unique challenges for identifying suitable detector locations across the conterminous United States. This talk will review current efforts by the Cosmic Explorer Project to identify potential site locations that will allow Cosmic Explorer to: achieve its science goals; be built within appropriate cost boundaries; attract, support, and retain its workforce; and to be a welcomed and synergistic part of its host communities.