09-0005_Walton Lake Trail Specs.doc

Section 911-Clearing and Grubbing

Description

911.01 Work. Work consists of clearing, grubbing, trimming, removing, or treating trees, logs, limbs, branches, brush, plants, and other vegetation within the clearing limits. Work includes the felling and treatment of designated trees outside the clearing limits. Also included are the protection from injury or defacement of trees and other objects not designated for removal and the treatment of damaged trees.

Construction

911.02 Clearing Limits. Clear to the dimensions SHOWN ON THE DRAWINGS or 12" beyond the fill and backslope catch points, whichever is greater.

911.03 Material to Be Cleared. Remove and dispose of trees, logs, limbs, branches, brush, herbaceous plants, and other vegetation within the clearing limits, except for the following:

a) Live, sound, and firmly rooted trees of the size SHOWN ON THE DRAWINGS.

b) Live brush, herbaceous plants, and trees between the trailway and the clearing limits that are less than

12" in height and less than ½" in diameter at ground line. Except as provided above, cut all limbs and branches more than ½" in diameter that extend into the clearing limits. Cut limbs flush with the tree trunks or stems or cut at the ground surface as SHOWN ON THE DRAWINGS. Fall and limb designated trees.

911.04 Damaged Trees. When felling, cutting, or trimming, do not cause bark damage to standing timber.

If damage does occur to standing trees, treat the injured trees as SHOWN ON THE DRAWINGS. Remove and dispose of trees with major roots exposed by construction that are rendered unstable.

911.05 Removal of Stumps. Remove all stumps within the trailbed. Remove stumps located between the edge of the trailbed and the edge of the tramway that cannot be cut flush with the finished slope or that are not tightly rooted.

911.06 Disposal of Clearing Slash, Logs, Stumps, Brush, and Roots. Limb all felled trees to a 4" diameter top, including designated trees outside the clearing limits.

Do not place clearing slash, logs, stumps, brush, or roots in concentrated piles. Scatter all logs, limbs, lopped tops, brush, and grubbed stumps and roots below the trailway and outside the clearing limits, with the following exceptions:

(a) Where the sideslope above the trail is less than 10 percent, material may be scattered above the trail.

(b) Logs may be left on the uphill side of the trail if they are placed so that they will not move into the clearing limits.

Do not place clearing and grubbing debris in water courses, snow ponds, lakes, meadows, or in locations where it could impede the flows to, through, or from drainage structures.

Measurement

911.07 Method. Measure the quantities in accordance with Section 906.

Payment

911.08 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

911(01) Clearing and Grubbing .......................................................................mi

911(02) Clearing and Grubbing ....................................................................... LF

911(03) Clearing and Grubbing ....................................................................... LS

911(04) Clearing ..............................................................................................mi

911(05) Clearing .............................................................................................. LF

911(06) Clearing .............................................................................................. LS

911(07) Grubbing .............................................................................................mi

911(08) Grubbing ............................................................................................. LF

911(09) Grubbing ............................................................................................. LS

911(10) Individual Removal and Disposal ....................................................... EA

911(11) Individual Removal and Disposal ...................................................... LS

Section 912-Excavation and Embankment

Description

912.01 Work. Work consists of the excavation and placement of excavated material, regardless of its nature, from within the trailway or from other sources, except for material included under other pay items

SHOWN IN THE SCHEDULE OF ITEMS. Includes excavation, embankment, and backfill construction required to shape and finish the trailbed, ditches, backslopes, fill slopes, drainage dips, trail passing sections, and turnouts. Also includes excavation and embankment work required to construct shallow stream fords and gully crossings, talus and rubble rock sections, and climbing turns.

Materials

912.02 Requirements. Use materials meeting the requirements of the following sections:

961 - Rock, Grid Pavement Units, and Aggregate

962 - Material for Timber Structures

964 - Geosynthetics

Construction

912.03 Use and Disposal of Excavated Material. Conserve and use all suitable material for specified work. Conserve excess excavated rock suitable for specified project work and use in place of materials from designated sources.

Remove all duff and debris from within trailway limits and uniformly spread outside the clearing limits, not more than 4" in depth (unless otherwise SHOWN ON THE DRAWINGS). Do not obstruct drainage or create piles, berms, or windrows of debris.

Place excess and unsuitable excavation beyond the downslope edge of the trailbed Do not obstruct drainage and spread to a depth not exceeding 4". This includes any material removed in the grubbing operation and deposited in the same area.

Place rocks over 4" in greatest dimension not used in construction beyond the hinge point on the downslope side. Place rocks so that the tops are at least 6" lower than the trailbed surface. Ensure that no blockage of drainage or creation of a windrow effect occurs.

912.04 Trailway Excavation and Embankment. Minor deviations of ± 12" in vertical alignment and 36" in horizontal alignment with smooth transitions of at least 30' on each side of the deviation are acceptable unless otherwise SHOWN ON THE DRAWINGS.

Construct embankments with suitable compacted material. Compact all disturbed soil within the trailbed area.

Remove any rock within or above the backslopes that is unstable. Use or dispose of rock in accordance with Subsection 912.03.

Leave the finished slope in a uniform and roughened condition.

Make necessary adjustments of horizontal or vertical alignment, within the tolerances specified in this subsection, to produce the designed trailway section and balance earthwork. Such adjustments shall not be considered as changes.

912.05 Trailbed Finish. Fill holes with suitable material, compact, and cut high points to provide a uniform trailbed finish.

912.06 Talus or Rubble Rock Sections. Through talus or rubble rock slide areas, fill all voids with suitable material to the depth SHOWN ON THE DRAWINGS. Use cap rocks that weigh a minimum of

130 lbs and have a length of at least twice their width. At least 50 percent of all hand-placed outer rocks should weigh a minimum of 130 lbs. Construct tread by building out rather than by removing material from the inner bank.

912.07 Ditches. Construct ditches to be free of loose rocks, roots, sticks, and other obstructions.

912.08 Geosynthetics. Where SHOWN ON THE DRAWINGS, place geosynthetics flat and parallel to centerline of the trail before placing embankment. Overlap geosynthetics a minimum of 24". Install anchors or fasteners as recommended by the geosynthetic manufacturer.

Measurement

912.09 Method. Measure the quantities in accordance with Section 906.

Payment

912.10 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

912(01) Excavation ......................................................................................... LF

912(02) Excavation .........................................................................................mi

912(03) Excavation ......................................................................................... LS

912(04) Trail Turnout ...................................................................................... LF

912(05) Trail Turnout ...................................................................................... EA

912(06) Rolling Dip ........................................................................................ EA

912(07) Shallow Stream Ford and Gully Crossing Structure............................ EA

912(08) Shallow Stream Ford and Gully Crossing Structure ........................... LS

912(09) Ditch ................................................................................................... LF

912(10) Borrow ............................................................................................... CY

912(11) Borrow ...............................................................................................LS

912(12) Grade Dip .......................................................................................... EA

912(13) Geosynthetics, Type _____ ................................................................ SY

912(14) Trail Passing Section .......................................................................... LF

912(15) Talus or Rubble Rock Section ...........................................................LF

Section 915-Existing Trail Restoration

Description

915.01 Work. Work consists of restoring the original trail template, including clearing, removing slough and berm, borrow, filling ruts and troughs, reshaping backslopes, excavation, reshaping trail tread, restoring drainage and other trail structures, constructing check dams, and removing protruding rocks, roots, stumps, slough, and berms.

Materials

915.02 Requirements. Use materials meeting the requirements of the following sections:

961 - Rock, Grid Pavement Units, and Aggregate

962 - Material for Timber Structures

Construction

915.03 Clearing and Grubbing. Clear and grub in accordance with the requirements of Section 911 and as

SHOWN ON THE DRAWINGS.

915.04 Excavation and Embankment. Excavate and place all excavated material in accordance with the requirements of Section 912 and as SHOWN ON THE DRAWINGS.

915.05 Rock and Root Removal. Uniformly scatter the removed rocks and roots below the trailway and distribute to ensure no blockage of watercourses or creation of a windrow. Fill holes with suitable material and compact.

915.06 Slough and Berm Removal and Excess Material. Use suitable slough and berm material within the trailway to restore the trailbed as SHOWN ON THE DRAWINGS. Place all unsuitable and excess material beyond the downslope edge of the trailbed and uniformly spread to a depth not exceeding 4" and so as not to obstruct drainage or interfere with the drainage of outsloped tread.

Remove berm when daylight can be obtained within a distance of 4' from the outsloped edge of finished tread unless otherwise DESIGNATED ON THE GROUND or SHOWN ON THE DRAWINGS.

915.07 Fill Material and Borrow. Use suitable material to fill ruts, troughs, and potholes in the tread that cannot be leveled and outsloped through performance of work in Subsection 915.06. Compact and shape as

SHOWN ON THE DRAWINGS.

Obtain borrow from areas SHOWN ON THE DRAWINGS or DESIGNATED ON THE GROUND.

915.08 Drainage. Restore drainage dips and ditches to reestablish drainage as SHOWN ON THE

DRAWINGS by removing obstructions such as rocks, roots, and sticks to make ditches and culverts free draining.

Restore rock spillways in accordance with Section 923 and as SHOWN ON THE DRAWINGS.

915.09 Stream Channel Cleaning. Clean channel of obstructions in areas SHOWN ON THE

DRAWINGS. Remove debris and rocks from the stream channel and scatter outside of the side slopes of the stream channel and beyond the clearing limits.

915.10 Check Dams. When constructing check dams for gullies, use dimensional lumber, sound peeled logs, or a row of stones placed across the gully in the subgrade with the ends securely embedded in the banks as SHOWN ON THE DRAWINGS and at locations STAKED ON THE GROUND.

Use suitable material for backfill as SHOWN ON THE DRAWINGS. Place and compact backfill to meet the density of the existing trailbed and to form a smooth tread.

915.11 Switchbacks. Restore switchbacks in accordance with Section 914 and as SHOWN ON THE

DRAWINGS.

915.12 Waterbars. Restore waterbars in accordance with Section 922 and as SHOWN ON THE

DRAWINGS. Reestablish drainage by removing accumulated material and replacing loose or missing rocks, unsuitable logs, and deteriorated rubber belting.

915.13 Turnpikes. Restore turnpikes in accordance with Section 913 and as SHOWN ON THE

DRAWINGS by replacing missing, rotten, or loose retainer logs and stakes, or missing or loose retainer rocks. Backfill with suitable material.

915.14 Trail Structures. Restore all trail structures at locations SHOWN ON THE DRAWINGS or

DESIGNATED ON THE GROUND.

915.15 Reshaping and Finishing Trailbed and Backslopes. Provide a firm and uniformly finished trailbed in accordance with cross-sections SHOWN ON THE DRAWINGS.

Provide a uniform and roughened surface on disturbed backslopes in accordance with cross-sections

SHOWN ON THE DRAWINGS. Cut all roots flush.

Measurement

915.16 Method. Measure the quantities in accordance with Section 906.

Payment

915.17 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

915(01) Trail Restoration ................................................................................ LF

915(02) Trail Restoration ................................................................................ LS

915(03) Check Dams ....................................................................................... EA

915(04) Borrow ................................................................................................CY Section 941-Aggregate Surfacing and Base Course

Description

941.01 Work. This work consists of furnishing, hauling, watering, placing, and compacting aggregate surfacing or base course; furnishing and installing retainers; and geosynthetics.

Materials

941.02 Requirements. Use materials meeting the requirements of the following sections:

961 - Rock, Grid Pavement Units, and Aggregate

962 - Material for Timber Structures

964 - Geosynthetics

Produce aggregate by pit run, screening, or crushing. Obtain materials from sources SHOWN ON THE

DRAWINGS or other sources approved by the CO in writing.

941.03 Handling Materials. Stockpile, remove, transport, and spread aggregates in a manner that will preserve specified gradation and avoid contamination. Do not intermingle stockpiles of aggregate having different gradations.

941.04 Sampling Aggregate. Submit test results and a Certificate of Compliance verifying that aggregate gradation meets contract requirements.

Sample the material before incorporation into the work as follows:

(a) For onsite-produced materials at crushing or screening plants, after additions of any necessary blending material.

(b) For commercially produced aggregates, at the producer's plant or stockpile.

The sampling will not be considered a final acceptance and will not preclude later sampling and testing after final processing of the material. Such sampling does not relieve the contractor of responsibility of providing quality control measures to ensure compliance with contract requirements.

Construction

941.05 Preparation of Subgrade. Prepare and finish trailbed as required under Section 912. Obtain written approval of the CO before placing aggregate.

941.06 Spreading and Compacting. Use aggregate that is uniformly mixed at optimum moisture content and spread and compact in layers to the final thickness and width SHOWN ON THE DRAWINGS. The maximum thickness of any one layer shall be 3". Obtain compaction by one of the following methods as

SHOWN IN THE SCHEDULE OF ITEMS:

(a) By hand, using non-mechanized compaction tools over the full area of each layer until visual displacement ceases;

(b) By mechanical vibratory compactors over the full area of each layer until visual displacement ceases, but not fewer than three complete passes;

(c) By using a roller or mechanical hand tamper until the density is at least 90 percent of the maximum density, as determined by AASHTO T 99, Method C or D.

Immediately following final spreading, smoothing, and compacting, correct any irregularities or depressions that develop by adding or removing material until the surface is smooth, uniform, and compacted.

941.07 Acceptance, Testing, Sampling, and Tolerances. Do not vary the total compacted thickness of the aggregate by more or less than ¾" from the specified thickness.

Do not vary the aggregate width by more than ± 2" from the specified width.

941.08 Timber, Log, or Rock Retainers. Bed retainers along their entire length and as SHOWN ON THE

DRAWINGS.

Measurement

941.09 Method. Measure the quantities in accordance with Section 906.

Payment

941.10 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price of each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

941(01) Aggregate Surfacing, Grading_____ ................................................. LF

Compaction Method_____

941(02) Aggregate Surfacing, Grading_____ ................................................. CY

Compaction Method_____

941(03) Aggregate Surfacing, Grading_____ ................................................. Ton

Compaction Method_____

941(04) Aggregate Surfacing, Grading_____ ................................................. LS

Compaction Method_____

941(05) Base Course, Grading_____ .............................................................. LF

Compaction Method_____

941(06) Base Course, Grading_____ ..............................................................CY

Compaction Method_____

941(07) Base Course, Grading_____ .............................................................. Ton

Compaction Method_____

941(08) Base Course, Grading_____ .............................................................. LS

Compaction Method_____

941(09) Watering ............................................................................................ LS

941(10) Retainers, Type_____ ........................................................................ LF

941(11) Geosynthetics Type_____ .................................................................. SY

Section 942-Hot Bituminous Plant Mix Trail Surfacing

Description

942.01 Work. This work consists of constructing a single course of hot bituminous plant mix on a prepared base course or trailbed and furnishing or installing retainers and geosynthetics.

Materials

942.02 Requirements. Use materials meeting the requirements of the following sections:

962 - Material for Timber Structures

964 -Geosynthetics

Use hot plant mix design that is currently in use by the local State department of transportation, the county, or city, and submit a certificate of compliance that the mix meets their requirements. Certify the locations of past projects for the CO's inspection prior to approval.

Construction

942.03 Weather Limitations. Do not place the bituminous mixture when weather conditions prevent the proper compaction of the mixture, the base course is frozen, or the average temperature of the underlying surface upon which the bituminous mixture is to be placed is less than 55°F. Do not place when it is raining or snowing.

942.04 Mixing. Do not allow the temperature of the mix to exceed 320°F when discharging from the mixer.

942.05 Surface Preparation. Remove loose aggregate, soil, or other deleterious materials from the surface to be paved. Prepare base or trailbed by shaping, watering, and compacting before placing plant mix.

Obtain the CO's approval before placing plant mix on prepared base.

942.06 Placement and Compaction. Place and compact plant mix to meet the lines, grades, and thicknesses SHOWN ON THE DRAWINGS. Avoid segregation of the mix. Hand or small machine placement of mix is permitted, except where the use of bituminous paving machines is required for areas

SHOWN ON THE DRAWINGS. Use only self-contained, power-propelled paving machine units, provided with an adjustable activated screed or strike-off assembly, heated if necessary, and capable of spreading and finishing courses of bituminous plant mix to the required widths and thicknesses.

Start compaction when the mix is above 240°F. Compact the mix with at least three passes over the entire trail surface. Use a steel wheel power roller that is of a minimum weight of 1 ton. Use vibratory plate compactors in areas that are not accessible to rollers. Continue compaction over the full width of the layer until visible deformation of the layer ceases.

942.07 Thickness. Do not vary the thickness of the compacted hot mix by more or less than 15 percent from the thickness SHOWN ON THE DRAWINGS and not consistently above or below the specified thickness.

942.08 Retainers. Bed retainers along their entire length and as SHOWN ON THE DRAWINGS.

Measurement

942.09 Method. Measure the quantities in accordance with Section 906.

Payment

942.10 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for the PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

942(01) Hot Bituminous Plant Mix Trail Surfacing ........................................ SY

942(02) Hot Bituminous Plant Mix Trail Surfacing ........................................ Ton

942(03) Retainers .............................................................................................LF

942(04) Geosynthetics, Type_______________ ..............................................SY

Section 954-Obliteration of Abandoned Trailways

Description

954.01 Work. This work consists of obliteration of trailways, construction of drainage structures, and reestablishment of natural drainage patterns and vegetation.

Construction

954.02 General. Obliterate trailways in locations SHOWN ON THE DRAWINGS or DESIGNATED ON

THE GROUND.

954.03 Trail Closure. Block trailway entrances to traffic by placing rocks, logs, tree branches, and duff across the trailway. Place rocks, logs, branches, and duff to conceal the abandoned trailway and discourage future use. Use rocks and other materials that are available in the areas to be obliterated.

954.04 Drainage Structures. Leave existing water bars on the abandoned trail segments in place unless designated for removal. Construct additional drainage structures in locations SHOWN ON THE

DRAWINGS or DESIGNATED ON THE GROUND.

954.05 Check Dams and Ditches. Construct check dams and ditches in locations SHOWN ON THE

DRAWINGS or DESIGNATED ON THE GROUND.

954.06 Scarify. Scarify the trail to promote the establishment of vegetation at locations SHOWN ON THE

DRAWINGS or DESIGNATED ON THE GROUND. Scarification is defined as breaking up the compacted soil to a depth and maximum clod size as SHOWN ON THE DRAWINGS.

954.07 Contour Restoration. Backfill trail sections where SHOWN ON THE DRAWINGS. On sidehill sections, pull fill material from the lower side of the trail, or the upper cut area, and place fill material in the original cut area to restore a natural-appearing contour and a natural drainage pattern.

954.08 Trench Backfill. Backfill trenched trail sections with compact suitable material until flush with the adjacent ground surface. Obtain backfill material from designated borrow sources.

Measurement

954.09 Method. Measure the quantities in accordance with Section 906.

Payment

954.10 Basis. Pay for the accepted quantities in accordance with Section 906 at the contract unit price for each PAY ITEM SHOWN IN THE SCHEDULE OF ITEMS.

Make payment under:

PAY ITEM PAY UNIT

954(01) Obliteration ........................................................................................ LS

954(02) Obliteration ....................................................................................... LF

954(03) Closure ................................................................................................ LS

954(04) Closure ................................................................................................ LF

954(05) Drainage Structures, Removal ........................................................... EA