Longmont’s Public Works and Natural Resources Office put together a Sustainability Evaluation System (SES) tool in order to evaluate the sustainability of projects in terms of social, environmental, and economic considerations. This is often referred to as the “three-legged stool” or “people, planet, profit.” In August of 2017, the SES tool was used to evaluate the St. Vrain Blueprint and come up with suggestions to make the Blueprint more sustainable.