2016-03-25_REVISION - M1989029 - Laserfiche WebLink

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AGGREGATE Mr.Peter Hays, Division of Reclamation. Mining and Safety INDUSTRIES March 25,2016 Page 3 master plan was completed in November. 2014 and included recommendations and conceptual design strategies for various reaches of St. Vrain Creek. The final master plan provided two possible alternatives for the reach that includes Longmont Distel Operations. with the preferred alternative being minor bank stabilization. The Longmont Distel Operations permit boundary consists of several individual parcels that are owned (with the exception of two small homestead parcels) by the City.jointly owned by the City and Boulder County. and/or under option to the City. "These properties are also included within the Sandstone Reach of the City's open space master plan for the St. Vrain River corridor. As part of the Resilient St. Vrain Project, the City took the lead in the restoration for this reach and performed a more detailed alternatives analysis to determine final design strategies. The City's preferred alternative, which provides for leaving the channel of St. Vrain Creek in its existing alignment through the Sandstone Reach, has been submitted by the City to the U. S. Army Corps of Engineers through a Section 404 Individual Permit Application NWO-2015- 02224-DEN. The Resilient St. Vrain Project is also currently going through the National Environmental Policy Act (NEPA)analysis process and an Environmental Assessment (EA) has been prepared. The EA will be available for a 30-day public review and comment period beginning March 30. 2016. The Resilient St. Vrain Project is part of the City's 2013 recovery work and is supported by various levels of the Colorado State government, including the Governor's Office of Flood Recovery and the Colorado Water Conservation Board (CWCB). which is a sister division of the Division of Reclamation. Mining and Safety in the Colorado Department of Natural Resources. A listing of agencies with whom the City has coordinated is included in the enclosed"Sandstone Ranch Reach Improvements Summary". That summary also includes a listing of public outreach venues through which the City has worked in developing the St. Vrain Creek Watershed Master Plan, which provided the foundation upon which the Resilient St. Vrain Project was designed. Additional Information Water Augmentation The currently approved reclamation plan(TR-04) provides a conceptual plan that includes approximately 30 acres of wetlands and 60 acres of ponds. According to post-flood mapping performed by ERO in support of the City's 404 permit application, there are approximately 78.8 acres of wetlands and 13.0 acres of open water within Sandstone Reach. While the 2013 flood impacts have changed the course of the St. Vrain River. and thus the size and location of pond and wetland features proposed in TR-04. it is not anticipated that this changed condition will impact an approved permanent augmentation plan for the post-mining depletions at Longmont Distel Operations.