Mark Twain NF Trail Maintenance

STANDARD SPECIFICATIONS FOR CONSTRUCTION OF TRAILS AND TRAIL BRIDGES ON FOREST SERVICE PROJECTS U.S. Customary Units National Technology and Development Program 10/30/2014 Supersedes the 1996 Standard Specification for Construction and Maintenance of Trails -- 1 of 158 -- Table of Contents Section 900. General Requirements 901. Terms, Format, Abbreviations, and Definitions 902. Intent of Contract 903. Control of Work 904. Control of Materials 905. Quality Assurance and Quantity of Measurement 906. Measurement and Payment 907. Mobilization 908. Construction Survey, Staking, Flagging and Cleanup 909. Maintenance for Traffic and Temporary Construction Access 909.10 Maintenance for Traffic 909.20 Temporary Construction Access Construction Specifications 910. Trailway 911.00. Tread and Prism 911.10. Excavation and Embankment 911.20. Borrow 911.30. Existing Trail Restoration 911.40. Slide Maintenance 911.50. Slough and Berm Removal 911.60. Obliteration of Abandoned Trails 911.70. Retainers 912.00. Clearing Limits 912.10. Clearing and Grubbing 912.20. Brush Cutting 912.30. Logging Out 912.40. Hazard Tree Removal 912.50. Loose Rock Removal 912.60. Rock and Root Removal 913.00. Surfacing 913.10. Aggregate Surfacing and Base Course 913.20. Hot Asphalt Surfacing 913.30. Cold Asphalt Surfacing 913.40. Grid Unit Surfacing 913.50. Riprap Surfacing 913.60. Chunk Wood Surfacing 913.70. Imported Clay Surfacing 913.80. Surface Maintenance 10/30/2014 Trail Specifications-1 -- 2 of 158 -- 914.00. Climbing Turn 914.10. Climbing Turn 914.20. Climbing Turn Maintenance 915.00. Talus Section 915.10. Talus Section 915.20. Talus Section Maintenance 916.00. Turnout and Passing Section 916.10. 916.20. 917.00. Fords 917.10. 917.20. 917.30. 917.40. 917.50. Turnout and Passing Section Turnout and Passing Section Maintenance Natural Ford Constructed Ford with Rock Structure Constructed Ford with Log Structure Stepping Stones Ford Maintenance 918.00. Foundations 918.10. Rock Foundations 918.20. Gabion Basket Foundations 918.30. Crib Foundations 918.40. Geosynthetic Foundations 918.50. Corduroy Foundations 918.60. Foundation Maintenance 919. Reserved for Trailway Special Project Specifications 920. Drainage Structures 921.00. Culverts 921.10. Standard Culvert 921.20. Standard Culvert with Headwalls 921.30. Rock Culvert 921.40. Treated Timber Box Culvert 921.50. Open-Top Drain 921.60. Bottomless Arch Culvert 921.70. Log Culvert 921.80. Culvert Maintenance 922.00. Waterbars 922.10. Rock Waterbar 922.20. Log or Treated Timber Waterbar 922.30. Belted Waterbar 922.40. Waterbar Maintenance 923.00. Spillways 923.10. Rock Spillway 923.20. Rock Spillway Maintenance 924.00. Underdrains 924.10. Rock Underdrain 924.20. Sheet Underdrain 924.30 Underdrain Maintenance 10/30/2014 Trail Specifications-2 -- 3 of 158 -- 925.00. Ditches 925.10. Side Ditch 925.20. Leadoff Ditch 925.30. Ditch Maintenance 926.00. Berms 926.10. Berm 926.20. Berm Maintenance 927.00. Drain Dips 927.10. Drain Dip 927.20. Drain Dip Maintenance 928.00. Check Dams 928.10. Check Dam 928.20. Check Dam Maintenance 929. Reserved for Drainage Structures Special Project Specifications 930. Trail Structures 931.00. Switchbacks 931.10. Type 1 – Radius Switchback 931.20. Type 2 – Circular Landing Switchback 931.30. Type 3 – Rectangular Landing Switchback 931.40. Switchback Maintenance 932.00. Turnpikes 932.10. Type 1 – Standard Turnpike 932.20. Type 2 – Standard Turnpike with Foundation 932.30. Turnpike Maintenance 933.00. Side Barriers 933.10. Stacked Rock Barrier 933.20. Masonry Rock Barrier 933.30. Barrier Rail on Grade 933.40. Barrier Rail on Post 933.50. Curbs 933.60. Guardrail 933.70. Side Barrier Maintenance 934.00. Puncheons 934.10. Standard Puncheon 934.20. Puncheon Without Decking 934.30. Puncheon Maintenance 935.00. Retaining Walls 935.10. Log Crib 935.20. Stacked Rock Retaining Wall 935.30. Wire Basket Retaining Wall 935.40. Masonry Rock Retaining Wall 935.50. Cast-in-place Concrete Retaining Wall 935.60. Retaining Wall Maintenance 10/30/2014 Trail Specifications-3 -- 4 of 158 -- 936.00. Stairways 936.10. Individual Steps 936.20. Overlapping Steps 936.30. Crib Ladder 936.40. Staircase 936.50. Ladder 936.60. Stairway Maintenance 937.00. Railing System 937.10. Railing System 937.20. Railing System Maintenance 938.00. Boardwalks 938.10. Standard Boardwalk 938.20. Elevated Boardwalk 938.30. Step and Run 938.40. Boardwalk Maintenance 939. Reserved for Trail Structures Special Project Specifications 940. Restriction Devices 941.00. Fences 941.10. Post and Wire Fence 941.20. Post and Rail Fence 941.30. Woven Wire Fence 941.40. Jack Leg Fence 941.50. Stacked Rail (Worm) Fence 941.60. Remove and Reset Fence 941.70. Fence Maintenance 942.00. Gates 942.10. Wire Gate 942.20. Swing Gate 942.30. Loose Rail Gate 942.40. Accessible Gate – Kissing Gates 942.50. Accessible Gate – Chicanes 942.60. Gate Maintenance 943.00. Cattle Guards 943.10. Standard Cattle Guard 943.20. Above Ground Cattle Guard 943.30. Cattle Guard Maintenance 944.00. Stiles 944.10. Stiles 944.20. Stile Maintenance 945.00. Bollards 945.10. Bollards 945.20. Bollard Maintenance 949. Reserved for Restriction Devices Special Project Specifications 10/30/2014 Trail Specifications-4 -- 5 of 158 -- 950. Signs and Markers 951.00. Signs 951.10. Signs 951.20. Sign Repair and Replacement Maintenance 952.00. Route Markers 952.10. Route Markers 952.20. Route Marker Maintenance 953.00. Reassurance Markers 953.10. Standard Forest Service Blaze 953.20. Manufactured Blazer 953.30. Reassurance Marker Maintenance 954.00. Mileage Markers 952.10. Mile Markers 952.20. Mileage Marker Maintenance 955.00. Cairns 955.10. Cairns 955.20. Cairn Maintenance 959. Reserved for Route Markers and Signs Special Project Specifications 960. Trail Bridges 961.…