LARIMER COUNTY RURAL AREA ROAD STANDARDS

More documents

Recommendations

Info

Appendix H – General NotesSection H.4 General Standard Notes for Construction Plansd. Seed shall be planted with a drill on all slopes of 3:1 or flatter. The drill musthave the capability of handling the kind and rate of seed being planted. Seedmay be broadcast by mechanical spreader, or by hydraulic equipment onareas that are small, too steep, or not accessible for drill seed-operations.Seeding rates shall be doubled when using broadcast or hydraulic seeding.Hydro mulching is allowed on slopes steeper than 4:1.e. Seed planted with a drill shall be covered with soil to a depth of 1/4 to 3/4inch. Seed planted by the broadcast method shall be incorporated into thesurface soil, to a maximum depth of 3/4 inch, by raking, harrowing, or otherproven methods.f. Mulch shall consist of either cereal grain straw or grass hay, at least 50% byweight, being 10 inches or longer. Application rate to be 2000 lbs/acre toachieve a stubbled surface. Anchoring with a mulch crimper is acceptable, orwith the use of a disc plow, set vertical to the ground with sufficient weight toachieve a crimping depth of at least 4 inches into the soil. All mulched areasshall be tackified after crimping. Tackifier, whether placed on soil or mulch,shall conform to the Colorado Highway Specifications, Section 213.02.Apply tackifier with a spray nozzle, dispensing a mist that will uniformly coverthe surface.g. All seeded areas shall be mulched, crimped, and tackified within 24 hoursafter seeding; otherwise, areas shall be reseeded, at the Developer’sexpense, prior to the mulching, crimping, and tackifying.h. All slopes steeper than 4:1 shall be tackified after the completion of seedingand fertilizing. Steep slopes or areas with unstable soil may also require soilretention blankets. Soil retention blankets shall be placed smoothly, butloosely, on the soil surface, without stretching. The upslope end shall beburied in a trench 6 inches wide by 6 inches deep beyond the crest of theslope, to avoid undercutting. There shall be a 6-inch overlap wherever oneroll of blanket ends and another begins, with the uphill blanket placed on topof the downhill blanket. There shall be a 4-inch overlap wherever 2 widths ofblanket are applied side by side. Insert staples in a pattern according to themanufacturer’s recommendation, at approximately 2 staples per square yard.“T” shaped pins shall not be used.i. To aid in germination, some form of irrigation may be required and it is theresponsibility of the Developer to perform any and all necessary operations tothat end.13. The following is the specific seed mix to be used at this site (insert mix):C. Street Improvements Notes1. All street construction is subject to the General Notes on the cover sheet of theseplans as well as the Street Improvements Notes listed here.2. The Larimer County Engineering Department should be notified of utility work,subgrade proof rolls, base course proof rolls, and paving operations. In addition,one or both of the Developer/Owner’s Inspecting Engineer and theDeveloper/Owner’s Materials Testing Engineer should be present. The LarimerCounty Engineering Department should be given at least twenty-four hoursadvance notice. If a Larimer County Engineering Department representative canLarimer County Rural Area Road Standards Page H-6October 22, 2007
Appendix H – General NotesSection H.4 General Standard Notes for Construction Plansnot be present for these activities, these activities may still be conducted, as longas the Developer/owner’s Inspecting Engineer and/or the Developer/Owner’sMaterials Engineer are present.3. Proof rolls should be performed on subgrade prior to placement of road base,and on road base prior to placement of asphalt. All failed areas or material whichexhibits excessive pumping or deformation shall be reworked, replaced orotherwise modified to form a smooth, non-yielding surfaces. Followingprecipitation, all areas should be re-proofrolled as needed based upon theevaluation of the Larimer County Engineering Department. Chemically treatedsubgrade will require proofrolling to demonstrate the adequacy of the chemicalstabilization. Non paved roads will only require one proofroll on subgrade prior toplacement of road base to demonstrate stability, however it is stronglyrecommended that additional proofrolls be performed by the contractor. Proofrollinspection and compaction test results must be approved by theDeveloper/Owner’s Materials Testing Engineer.4. For a mechanical "proof roll", the entire subgrade and/or base material must berolled with a heavily loaded vehicle having a total GVW of not less than 50,000lbs. and a single axle weight of at least 18,000 lbs. with pneumatic tires inflatedto not less that 90 p.s.i.g. “Proof roll” vehicles shall not travel at speeds greaterthan 3 m.p.h. during the proofroll.5. The pavement section design, signed and stamped by a Colorado licensedEngineer, should be included in the construction plan set. Prior to paving, theasphalt mix design must be approved and certified by the Larimer CountyEngineering Department.6. Where proposed paving adjoins existing asphalt, the existing asphalt shall besaw cut from the existing edge to create a clean construction joint. TheDeveloper shall be required to remove existing pavement to a distance where aclean construction joint can be made. Wheel cuts shall not be allowed.7. The top 12 inches of street subgrades shall be scarified and re-compacted priorto subbase installation. No base material shall be laid until the subgrade hasbeen inspected and approved by the Developers material testing engineer.8. Valve boxes and manholes are to be brought up to grade at the time of pavementplacement or overlay. Valve box adjusting rings are not allowed, unlessotherwise directed by the utility company.9. When an existing asphalt street must be cut, the street must be restored to acondition equal to or better than its original condition. The existing streetcondition shall be documented by the Larimer County Engineering Departmentbefore any cuts are made. Patching shall be done in accordance with the LarimerCounty Street Repair Requirements specified in the Larimer County Rural RoadStandards. The finished patch shall blend in smoothly into the existing surface.All large patches shall be paved with an asphalt lay-down machine. In streetswhere more than one cut is made, an overlay of the entire street width, includingthe patched area, may be required. The determination of need for a completeoverlay shall be made by the Larimer County Engineering Department at the timethe cuts are made.10. All traffic control devices shall be in conformance with these plans or asotherwise specified in M.U.T.C.D. (including Colorado supplement) and as perthe Right-of-Way Construction Permit traffic control plan.Larimer County Rural Area Road Standards Page H-7October 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 13 and 14:
Page 15 and 16:
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 23 and 24:
Page 25 and 26:
Page 27 and 28:
Chapter 4 - Road Design and Technic
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
4.9.1.7 Design VehiclesChapter 4 -
Page 37 and 38:
Page 39 and 40:
CHAPTER 5 - GEOTECHNICAL STANDARDS
Page 41 and 42:
Chapter 5 - Geotechnical Standards
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Chapter 6 - STORMWATER MANAGEMENTSe
Page 51 and 52:
Chapter 7 - Bridges and Major Drain
Page 53 and 54:
Chapter 8 - Environmental and Agric
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 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
CHAPTER 11 - ACCESS AND UTILITY PER
Page 73 and 74:
Chapter 12 - Right of Way Permittin
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
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
Page 110 and 111: APPENDIX D - CONSTRUCTION STANDARDS
Page 112 and 113: Appendix D - Construction Standards
Page 130 and 131: APPENDIX E - CONSTRUCTION TESTING F
Page 132 and 133: Appendix F - Guidelines for Traffic
Page 140 and 141: APPENDIX G - DESIGN AND CONSTRUCTIO
Page 142 and 143: Appendix G - Design and Constructio
Page 154 and 155: Appendix H - General NotesSection H
Page 162 and 163: APPENDIX I - VARIANCE REQUEST SUBMI
show all

LARIMER COUNTY RURAL AREA ROAD STANDARDS

Create successful ePaper yourself

Delete template?

Save as template?