LARIMER COUNTY RURAL AREA ROAD STANDARDS

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CHAPTER 8 – ENVIRONMENTAL AND AGRICULTURAL DESIGNGUIDELINES8.1 PRE-DESIGN STAGEAt this stage of the project an initial research of available mapping should be accomplished toobtain a first-order screening of potential environmentally sensitive characteristics of the projectsite. Additionally, there should be a compilation of all of the appropriate local, State and Federalagencies to be contacted regarding environmental concerns and any necessary permits.The following suggested protocol should be completed during this phase, namely:A. Define resourcesB. Inventory resourcesAll appropriate mapping resources should be reviewed for the following:A. 100-Year Flood PlainsB. Geologic Hazards and TopographyC. Wildfire HazardsD. Cultural Resources and Geologic FeaturesE. WetlandsF. Important Wildlife Habitat and CorridorsG. Rare and Endangered Plants and AnimalsH. Commercial Mineral ResourcesAreal extent of disturbance must be estimated to determine if a State Stormwater Permit(NPDES permit) is necessary. Any disturbance exceeding one acre in size will probably requireapplication for this permit before construction activities begin. If wetlands occur in the projectarea the extent of wetlands disturbance, if any, should be estimated and potential mitigationassessed.A preliminary site survey of resources at the project site should be accomplished and potentiallyrelevant sensitive environmental resources assessed. Relevant resource boundary areasshould be delineated and sufficient points surveyed to allow the boundaries to be plotted onplan.This information will address all known environmental issues and resource concerns. Anexample of an Environmental Checklist, outlining the necessary requirements for resourceinventories and potential permit requirements, is provided in this chapter. The preliminarychecklist should be completed and included in the Preliminary Environmental Report for theproject. This will insure that all required steps are taken to inventory resources, investigatepermit requirements, and make contacts with all appropriate agencies regarding the proposedproject.Larimer County Rural Area Road Standards Page 8-1October 22, 2007
Chapter 8 – Environmental and Agricultural Design GuidelinesSection 8.2 Design Documents Stage8.2 DESIGN DOCUMENTS STAGEA. The following three steps should be accomplished at this stage:1. Analyze impacts.2. Define tools for protection and mitigation.3. Consider cumulative impacts.B. The Preliminary Environmental Report should be compiled as a Design Documentbefore Preliminary Design is begun by the Owner’s Engineer. The report shouldconsist of;1. A summary of environmental resources at the project site,2. A summary description of general habitat type and species observed during thepreliminary site investigation,3. Analysis of environmental impacts and possible mitigation, and4. An accounting of local, state and federal requirements for permitting or siteanalyses.C. The report should include the following:1. General definition of habitat2. Preliminary inventory of resources3. Expected effects to these resources4. Possible mitigation requirementsa. Mandated or simply appropriate5. Potential required permits or notifications of intenta. NPDES Water Quality Permitb. 404 Wetlands Permitc. Colorado Division of Wildlifed. Colorado Historical Societye. U.S. Fish and Wildlife Service6. A map representing environmental resources at the project site shouldaccompany the report. Surveying of resource boundary areas will facilitateassessment of any adverse effects to these resources. Points to be surveyedshould be marked in a manner to assure easy discovery and identification. Itmay be necessary for the individual setting the points in the field to accompanythe survey crew to the site to assure efficiency in this identification and to insurethat additional surveys are minimized.7. Assessment of resources and potential mitigation requirements should bedetailed to the extent that the Owner’s Engineer may consider incorporation ofany special design requirements at the earliest stages of the project. ThePreliminary Environmental Report should be used to assess environmentalrequirements during the Preliminary Design stage of the project.Larimer County Rural Area Road Standards Page 8-2October 22, 2007
Page 1 and 2: LARIMER COUNTYRURAL AREA ROAD STAND
Page 3 and 4: Table of Contents3.3.11 Typical Str
Page 5 and 6: Table of ContentsCHAPTER 8 - ENVIRO
Page 7 and 8: Table of Contents12.3.7.2 Conventio
Page 9 and 10: Table of ContentsG.7.12 Other Permi
Page 11 and 12: Chapter 1 - General InformationSect
Page 17 and 18: Chapter 2 - Submittal ProceduresSec
Page 19 and 20: Chapter 2 - Submittal ProceduresSec
Page 21 and 22: Chapter 3 - Submittal Requirements
Page 27 and 28: Chapter 4 - Road Design and Technic
Page 35 and 36: 4.9.1.7 Design VehiclesChapter 4 -
Page 39 and 40: CHAPTER 5 - GEOTECHNICAL STANDARDS
Page 41 and 42: Chapter 5 - Geotechnical Standards
Page 49 and 50: Chapter 6 - STORMWATER MANAGEMENTSe
Page 51: Chapter 7 - Bridges and Major Drain
Page 55 and 56: Chapter 8 - Environmental and Agric
Page 57 and 58: 9.1.3 DefinitionsChapter 9 - Roadwa
Page 59 and 60: CHAPTER 10 - ACCESS REQUIREMENTS AN
Page 61 and 62: Chapter 10 - Access Requirements an
Page 71 and 72: CHAPTER 11 - ACCESS AND UTILITY PER
Page 73 and 74: Chapter 12 - Right of Way Permittin
Page 93 and 94: Appendix A - Definitions and Abbrev
Page 95 and 96: Appendix A - Definitions and Abbrev
Page 97 and 98: APPENDIX B - REFERENCES AND RESOURC
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APPENDIX D - CONSTRUCTION STANDARDS
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Appendix D - Construction Standards
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APPENDIX E - CONSTRUCTION TESTING F
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Appendix F - Guidelines for Traffic
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APPENDIX G - DESIGN AND CONSTRUCTIO
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Appendix G - Design and Constructio
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Appendix H - General NotesSection H
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APPENDIX I - VARIANCE REQUEST SUBMI
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LARIMER COUNTY RURAL AREA ROAD STANDARDS

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