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red buttonProject Summary

The Longmont Diagonal rail project is part of the Regional Transportatin District (RTD) FAsTracks program that proposes a commuter rail transit corridor connecting Denver Union Station to Boulder, then on to Longont.  The feasibility of extending rail through the Longmont corridor was established by RTD in 2005 in the Longmont Diagonal Rail Feasibility Study.   Further analysis of extending rail to Longmont is provided in this Longont Diagonal Environmental Evaluation document (Longmont EE).

Executive Summary

Table of Contents

Project Goals and Objectives

Alternatives Considered

  Part 1 / Part 2 / Part 3

Affected Environment and Environmental Consequences


  Land Use

  Economic Considerations

  Right-of-Way and Relocations

  Social Impacts and Community Facilities

  Environmental Justice/Title VI

  Cultural Resources

  Parklands and Open Space

  Public Safety and Security

  Air Quality

  Noise and Vibration


  Threatened and Endangered Species and Wildlife

  Mineral Resources



  Water Resources

  Wetlands and Other Water Features

Transportation Impacts and Mitigation Measures

Environmental Next Steps


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City of Longmont Planning and Development Services Division
Civic Center Complex
350 Kimbark Street
Longmont, CO 80501
303-651-8330 / Fax: 303-651-8696 / e-mail: