SupplementalSpecs_Suntaheen_Phase2a.docx

Suntaheen Fish Pass CXT Toilet Installation and Parking Area Expansion

Supplemental Specifications

SECTION 003010

DEFINITION OF BID ITEMS

PART 1 -GENERAL

1.01 SUMMARY

A. The basis for measurement and payment for all work performed under this contract shall be as listed in the Schedule of Items. Unless the work is specifically called out to be measured and paid for in the Schedule of Items, payment for such work shall be included in other applicable items of the Schedule of Items. There shall be no separate measurement and payment for any such work not specifically listed in the Schedule of Items.

B. The Contractor shall complete unit and total pricing for ALL items. If “optional” items are presented the “optional” item work shall be bid as mutually exclusive (stand-alone) items. The Contracting Officer and the government reserves the right to award individual optional items, as funding becomes available.

C. The application of any pay item to more than one site will be marked by prefixes to differentiate between them on the Schedule of Items.

D. When more than one class, size, type, thickness, etc. is specified in the Schedule of Items for any pay item, suffixes will be added to the item number to differentiate between the pay items.

E. Mobilization is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

F. Items listed in the Schedule of Items as lump sum shall be on a lump sum all required basis. No direct measurement will be made for lump sum bid items.

G. The summation of all bid items under the Schedule of Items shall equal all work required by the drawings and Specifications regardless of whether individual items of work are described under bid item descriptions or not. Payment shall be made at the contract unit bid or lump sum prices listed in the Bid. The prices listed therein shall be payment in full for all labor, tools, equipment, materials, etc., which are required to construct respective bid items according to the Contract Documents, including all work and materials incidental thereto.

H. Payment for unit bid items and lump sum bid items only partially completed at the end of monthly pay periods shall be based on a percentage of work completed as determined by the Government. An example is the construction of pipelines where the unit bid price includes the excavation and backfill of the trenches, installation of pipe, trench compaction, flushing and testing, although the Contractor may have installed a certain length of pipeline, yet has not completed the testing and/or restoration work. The actual payment for that bid item will be reduced to reflect the actual amount of work completed.

1.02 UNITS OF MEASUREMENT

A. LUMP SUM QUANTITIES (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

1.03 DEFINITION OF BID ITEMS

A-1. Mobilization/Demobilization

a. Payments shall be made at the lump sum price stated in the Schedule of Items for "Mobilization/Demobilization."

A-2. CXT Toilet, Including Delivery and Installation

0. Includes all work necessary to install and make fully functioning the new CXT Toilet in the location indicated on the drawing

A-3 All Work in Plans Except Where Identified in Other Line Items

a. Includes all work necessary to construct the project indicated, except where identified in other line items

END OF SECTION 003010

SECTION 009030 INTENT OF THE CONTRACT

903.01 Intent. The intent is to provide for the completion of the project described in the contract. Furnish all labor, materials, equipment, tools, transportation, utilities, and supplies, and perform all work required to complete the project in accordance with drawings, specifications, and provisions of the contract.

END OF SECTION 009030

SECTION 009050 CONTROL OF MATERIALS

905.01 Handling Materials. Transport and handle all materials to preserve their quality and fitness for the work. Stockpile, load, and transport aggregates in a manner that will preserve specified gradation and avoid contamination.

Store materials to assure the preservation of their quality and fitness for the work. Locate stored materials to facilitate their prompt inspection. Arrangements for storage on other than designated sites are the responsibility of the contractor.

END OF SECTION 009050

SECTION 009060 MEASUREMENT AND PAYMENT

906.01 General. Measurement and payment for contract work will be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work and materials will be considered incidental and included in the payment of the PAY ITEMS in the SCHEDULE OF ITEMS.

When more than one class, size, or thickness is specified in the SCHEDULE OF ITEMS for any PAY ITEM, suffixes will be added to the item number to differentiate between the items.

906.02 Units of Measurement. Payment will be made by units defined and determined according to standard measure and by the following:

a) Each (EA). One complete unit, which may consist of one or more parts.

b) Lump Sum (LSQ). The quantities that denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

c) Linear Feet (LF). Measurement in feet taken along the centerline of the work item and parallel to the finished grade.

d) Square Feet (SF). Measurement taken by determining surface area.

END OF SECTION 009060

SECTION 009070 QUALITY ASSURANCE

Description

907.01 Work. Work consists of providing certification that the quality of construction conforms to the drawings, specifications, and requirements of the contract.

Construction

907.02 Certification and Measurements

a) Offsite-Produced Materials. Furnish signed certificates executed by the manufacturer, supplier, or vendor, stipulating that all offsite-produced materials incorporated in the work meet applicable requirements SHOWN ON THE DRAWINGS or stated in the specifications. Furnish a certificate for each commodity or invoice.

END OF SECTION 009070

SECTION 011110 MOBILIZATION

PART 1 - GENERAL

1.01 DESCRIPTION

A. This work consists of moving personnel, equipment, material and incidentals to the project and performing all work necessary before beginning work at the project site. Mobilization includes the costs associated with obtaining permits, insurance, and bonds. Mobilization is not intended to pay for the costs of materials before they are used on the project site.

1.02 PAYMENT

A. Make progress payments for mobilization as follows:

1. Reimburse for bond premiums before issuing the Notice to Proceed if evidence of payment is received.

2. When 5 percent or more of the original contract amount is earned from other PAY ITEMS, pay mobilization at the rate of 50 percent, or up to 5 percent of the original contract amount, whichever is less.

3. When 10 percent or more of the original contract amount is earned from other PAY ITEMS, pay mobilization at the rate of 100 percent, or up to 10 percent of the original contract amount, whichever is less.

4. Pay any unpaid amount for mobilization upon final acceptance of all work items.

END OF SECTION 011110

SECTION 013300 SUBMITTALS

PART 1 – GENERAL

1.01 SUBMITTALS PROCEDURES

A. Provide submittals in a timely manner to ensure sufficient time to complete all required reviews prior to required construction window. Allow 10 workdays for review. If a submittal is rejected, a resubmittal is required, and the time for review is restarted.

B. Submit all design submittals in electronic PDF format to the COR.

PART 2 – PRODUCTS Not Used

PART 3 – EXECUTION

3.01 MATERIAL SUBMITTALS

Provide submittals as described below and elsewhere in the project specifications:

A. For the toilet, provide manufacturer’s installation instructions and specifications and manufacturer’s completed cost worksheet and order form showing all options, colors, etc. to verify the correct options for approval prior to ordering the unit.

B. For the toilet, provide manufacturer’s technical sheets for the adhesive sealant (between the vault and building slab), and the caulking (between the riser and slab, and vent stack and slab), to the CO for approval before installation.

C. Provide submittal for concrete mix in conformance with Section 033000.

D. Provide Sieve Analysis for aggregates to show gradation for crushed aggregates and riprap from Commercial Source.

E. Provide submittal for use of Unclassified Borrow from Government Source located on Road 8530, if decided not to use Commercial Source. Access, material gradation, and quantities will need to be determined and approval will be authorized by the CO in writing, if allowed.

3.02 PLAN SUBMITTALS

A. Provide Daily Work Schedule B. Safety Plan C. Camping Plan (if applicable)

END OF SECTION 013300

SECTION 013310 CONSTRUCTION LAYOUT

PART 1 – GENERAL

1.01 SUMMARY

A. Section includes the layout of the project for construction. This work consists of establishing any staking and flagging needed in addition to existing staking, and removing and disposing of all construction stakes, tags, flagging, and plastic ribbon from the project area.

PART 2 – PRODUCTS Not Used

PART 3 – EXECUTION

3.01 PROJECT LAYOUT

A. Provide a construction survey based on controls provided by the Government or other sources.

B. Stake all site features such as toilets, paths, pads, concrete, and other features for approval prior to commencing construction in that area. The Government may make minor adjustments to the location of these features to best fit the site. Survey and maintain these revised stakes as control for construction. Do not perform work in the absence of approved construction staking or control points.

C. Relocate provided control points that may be damaged by construction activities. Furnish the coordinates and elevations for the relocated points before the initial points are disturbed. If construction stakes or control points are destroyed or displaced, replace as originally installed and notify the COR. If any construction stakes or control points are erroneous, notify the COR.

D. Survey and stake features to an accuracy of .1 feet horizontal and vertical.

END OF SECTION 013310

SECTION 015710

TEMPORARY CONTROLS

PART 1 GENERAL

0.01 DESCRIPTION

A. The work of this section consists of providing temporary controls.

1. PART 2 PRODUCTS

None

2. PART 3 EXECUTION

2.01 HOUSEKEEPING

A. Keep project neat, orderly, and in a safe condition at all times.

B. Do not store rubbish or volatile waste on-site. Dispose of all waste materials as specified.

C. Utilize suitable excavated material as soon as possible.

2.02 DISPOSAL

A. Remove excess excavated material (including rocks and boulders) that cannot be used in construction. A waste site is located on Road 8533.

B. Unless otherwise specified, all removed material becomes the property of the Contractor and shall be disposed of off Government property according to all Federal, State, and local laws, rules, and regulations.

C. Immediately remove hazardous rubbish from project site. Place other construction debris in refuse containers at least daily. Dispose of refuse at least weekly, in a legal manner, at public or private dumping areas outside the Forest Service property. Do not burn or bury refuse.

2.03 AIR AND WATER POLLUTION CONTROL

A. Provide and install all erosion control fencing and other measures as necessary.

B. All chlorinated water shall be dechlorinated and other contaminants removed prior to discharging to any storm drainage or natural waterways. All discharges of water from this project shall be approved by the Contracting Officer.

C. Take all necessary reasonable measures to reduce air and water pollution by any material or equipment used during construction.

D. Do not dispose of volatile wastes or oils in storm or sanitary drains on Forest Service lands.

E. Do not allow waste materials to be washed into streams or bodies of water.

END OF SECTION 015710

SECTION 017700

PROJECT CLOSEOUT

PART 1 GENERAL

1.01 DESCRIPTION

A. The work of this section consists of final cleanup, closeout submittals, and final inspection procedures.

PART 2 PRODUCTS

1. 2.01 CLEANING MATERIALS

A. As recommended by the manufacturer of surface to be cleaned or refinished.

PART 3 EXECUTION

3.01 CLEANING/REFINISHING

A. Before scheduling the final inspection, remove all tools, equipment, surplus materials, and rubbish. Remove grease, dirt, stains, foreign materials, and labels from finished surfaces. Pick up all construction debris from the site.

B. Apply touch-up paint or otherwise refinish surfaces that are damaged due to work of this contract to original condition.

3.02 SUBSTANTIAL COMPLETION AND FINAL INSPECTION

A. Submit written certification that project, or designated portion of project, is substantially complete, and request in writing a final inspection. Contracting Officer will make an inspection within 10 days of receipt of request. Certification shall include a listing of significant items that are not complete in accordance with the contract and shall indicate the schedule date for the completion of these items. Upon receipt of written certification project is substantially complete, the Contracting Officer will proceed with inspection within 10 days of receipt of request or will advise the Contractor of items that prevent the project from being designated as substantially complete.

B. If, following final inspection, the work is determined to be substantially complete, Contracting Officer will prepare a list of deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion.

C. If, following final inspection, the work is not determined to be substantially complete, Contracting Officer will notify Contractor in writing. After completing work, Contractor shall resubmit certification and request a new final inspection. All re-inspection costs may be charged in accordance with the Inspection of Construction clause of the contract.

3.03 ACCEPTANCE OF THE WORK

A. After all deficiencies have been corrected, a Letter of Acceptance will be issued.

END OF SECTION 017700

SECTION 133423 VAULT TOILET

PART 1- GENERAL

1.01 DESCRIPTION. This work consists of the provision and installation of a pre-manufactured vault toilet structure. Install in accordance with the manufacturer’s installation instructions. Work includes excavation, bedding and backfill, compaction, and building installation.

1.02 RELATED WORK

A. Section 013300, Submittals

PART 2 – MATERIALS

1. AGGREGATE. Surface and Base Course Aggregate for approach ramp per Section 321500.

1. VAULT TOILET

1. Provide vault toilet as manufactured by CXT Inc., 3808 N. Sullivan Road, Bldg. 7, Spokane, WA 99216, Ph. (509_ 921-8766; www.cxtinc.com as follows:

1. Model to be “Rocky Mountain Vault Restroom,” right hand building, vent on back wall (behind toilet riser).

1. Roof to have a “cedar shake” pattern with a granite rock color.

1. The top section of the building to be “Horizontal Lap”

1. Bottom section to be “napa valley stone” pattern that is colored “natural grey”

1. Provide 2-tone paint touch up kit.

1. Provide the marine package option.

1. Access hatch to vault must have a raised stem to keep ice-damming and water intrusion during the winter to a minimum.

1. Door opener to be double pull/slide lock

1. Lockset shall have a lever handle on both inside and out, and an emergency slot on the exterior handle so that the door can be unlocked from the outside with a coin, flat screwdriver or similar tool. Sliding bolts will not be accepted.

1. Provide “Raised Wet Hatch” option.

1. The toilet paper roll holder will hold 4 rolls minimum.

PART 3 – EXECUTION

3.01 GENERAL

A. Carefully lay out, cut, fit together and erect all work. Install pre-manufactured equipment per manufacturer’s printed instructions.

B. Locate and orient building as detailed and shown on the plans.

C. Install aggregate approach ramp as shown in drawings and details.

3.02 DRAINAGE AND GRADING. Set the finished floor elevation of the structure to provide positive drainage in all directions consistent with ADA standards.

END SECTION 133423

SECTION 311000 CLEARING AND GRUBBING

1.01 DESCRIPTION. This work includes marking clearing limits, clearing, grubbing, trimming, and removing and disposing of trees, construction slash and debris. This work also includes preservation of trees from injury or defacement.

PART 2 – MATERIALS. Not Used

PART 3 - EXECUTION

3.01 CLEARING LIMITS

A. Clearly stake and obtain approval for clearing limits prior to proceeding with clearing and grubbing.

B. Confine all equipment, construction activity and material stockpiles to within the clearing limits and work areas. Do not place equipment and material used for the construction upon drainages, streams, adjacent wetland areas or within driplines of live trees.

C. The intent of these documents is to limit construction disturbance to a minimum distance beyond the edge of new improvements. Establish approximate construction limits as specified below, except as otherwise shown on the plans or as approved:

1. Excavations: At the top of cut slopes.

2. Embankments: At the bottom of fill slope.

3. Structures: Five-feet (5’) beyond foundation walls, or as required for excavation or embankment.

3.02 CLEARING AND GRUBBING. Where clearing is required, clear, grub, remove and dispose of offsite all debris, trees, snags, downed timber, stumps, roots, brush, and other protruding vegetative material within the clearing limits, not designated to remain.

3.03 TREE PROTECTION AREAS

A. Do not remove any trees without prior approval in accordance with the following specifications.

B. Do not operate or store equipment or materials within the drip lines of trees designated to remain.

3.04 TREE REMOVAL

A. The Contracting Officer will mark hazard trees for removal.

B. Flag the trees to be removed for approval prior to cutting.

C. Remove trees in a manner that protects adjacent trees designated to remain from damage. This includes directional falling or removing trees by “chunking” in pieces.

D. Tree trimming and root pruning shall be in accordance with standards established by the International Society of Arboriculture. Limb trees with clean cuts made flush with the outside edge of branch collar.

E. Remove and dispose of offsite all cleared material, including logs and related slash.

END SECTION 311000

SECTION 312213

GRADING

PART 1 - GENERAL

SUMMARY

This section specifies grading requirements for project.

RELATED SECTIONS

311000 - Clearing and Grubbing.

312300 - Excavation and Backfill for Structures.

312500 - Sediment and Erosion Control Measures.

PART 2 - PRODUCTS

MATERIALS

Fill Material.

Material free from frozen or organic material, and rocks larger than 2 inches.

PART 3 - EXECUTION

CONSTRUCTION

General.

Grade around buildings to the contours and elevations shown on the Drawings and smoothly blend into existing contours. Grade to uniform levels or slopes between points where grades or contours are given, round surfaces at abrupt changes in levels. Slope ground away from building walls and walks to facilitate drainage.

Hand rake areas within the grading limit lines. Remove all roots, brush, weeds and stones larger than 2 inches from the finish graded surface.

Grading Around Buildings.

Grade all areas to produce uniform slopes between spot elevations and contours.

Control grading within 5 feet of buildings and all other structures to prevent water from running into excavated areas. Remove all water, which accumulates in excavated areas.

Crawl Spaces.

Grade crawl spaces to a uniform slope.

Excess Material.

Remove excess material, not required for grading, from the site.

PART 4 - MEASUREMENT AND PAYMENT) (NOT USED

END OF SECTION 312213

SECTION 312300

EXCAVATION AND EMBANKMENT

PART 1- GENERAL

1.01 DESCRIPTION

A. This work shall consist of excavation and shaping of gravel in locations noted on the plans. Work includes excavation of unsuitable material, embankment construction, and disposal of excavated material necessary for the completion of construction.

PART 2 - MATERIALS

2.01 embankment material A. Crushed aggregate shall meet the requirements of D-1 aggregate Alaska DOT&PF Standard Specifications for Highway Construction 17th Edition http://www.dot.state.ak.us/stwddes/dcsspecs/assets/pdf/hwyspecs/sshc2017.pdf FP-14 Subsection 703.05, Table 703-2 Gradation D-1 B. Unclassified Borrow to meet the following specifications:

1. Maximum particle size: 24 in

2. Maximum mass passing no 200 sieve: 25%

3. USGS Classifications: gravel and sand; sand; silty gravel and sand or clayey gravel and sand C. Suitable Excavated Material: Rock that can be accommodated in the constructed feature, free of duff and vegetative material with a recognizable granular texture

PART 3 - EXECUTION

3.01 CLEARING AND GRUBBING

A. Clearing and grubbing shall be accomplished before excavation or embankment placement begins. Within the clearing limits, clear trees, brush, downed timber and other vegetation.

B. Clearing limits are 5 feet from the edge of shown improvements.

3.02 EXCAVATION

A. Excavate as required to accommodate the new construction. Establish subgrade to an elevation below the finished grade to accommodate embankment and surfacing as specified and detailed on the plans.

B. Make excavations for posts to dimensions shown on the drawings. Take care not to disturb bottom of excavations.

3.03 UTILIZATION OF EXCAVATED MATERIALS

A. Suitable excavated material as approved by the CO may be used in the construction of embankment, subgrade, bedding, and backfill for the structure.

B. Unsuitable material shall be excavated and disposed of off Forest Service land. Excavated areas shall be backfilled with suitable material when necessary to complete the work. Frozen material shall not be placed in embankments.

C. Reserve all excavated soil as approved and stockpile for use as planting soil.

3.04 OVERBUILDING AND LANDSCAPE PROTECTION

A. Confine excavation and embankment material to within the clearing limits to protect the native landscape.

3.05 grading A. Uniformly grade areas within all work areas and establish natural transitions to adjacent undisturbed surfaces as approved by the CO. Finish surfaces free from irregularities and abrupt changes in grade.

3.06 COMPACTION

A. Subgrade under new parking: Place embankment material in horizontal layers not exceeding 12 inches in compacted thickness. Obtain compaction by mechanical vibratory compactors or construction equipment over the full area of each layer until visual displacement ceases, but not fewer than three complete passes.

B. Crushed aggregate surfacing: Obtain compaction by mechanical vibratory compactors or construction equipment over the full area until visual displacement ceases, but not fewer than three complete passes.

END SECTION 312300

SECTION 312500

SEDIMENT AND EROSION CONTROL MEASURES

The work under this section consists of furnishing all necessary labor, equipment, materials, and performing all operations in connection with construction sediment and control measures.

General All erosion and sediment control measures are to be placed prior to any disturbance caused by grading and or excavation and shall conform to the requirements of the appropriate regulatory agency for the State.

The Contractor shall be solely responsible for ensuring that erosion and sediment control measures are implemented and maintained at the site.

Soil disturbing activities include but are not limited to: Clearing and grubbing, excavation, roadway and parking lot construction, construction or modification of site drainage, and grading.

Synthetic Filter Fabric for silt fences.

Pervious sheet of polypropylene, nylon, or polyethylene fabric conforming to the following physical and hydraulic characteristics:

Filter fabric should contain ultraviolet ray inhibitors and stabilizers to provide a minimum of 6 months of expected usable construction life at a temperature range of 0 to 120 F.

Support Posts: 4 foot - 2 x 2 wood.

Straw Bales.

Oat or wheat straw, free from weeds, viable weed seeds, foreign matter detrimental to plant life, and dry.

Grass hay bales are not acceptable.

In order to prevent deterioration of the bindings, all bales shall be either wire-bound or string-tied so that bindings are oriented around the sides rather than along the tops and bottoms of the bales.

Install straw bales at local drainage ways to prevent silt intrusion upon adjacent drainage courses. Remove straw bales following establishment of vegetation cover and utilize as mulch at swales or on steep slopes.

Prior to construction, install silt fence along the downhill construction limits in accordance with the erosion control standard detail to prevent silt intrusion upon adjacent land.

Install sediment and erosion control measures on the down slope toe of all top soil stock piles.

Maintain and remove all erosion controls as specified.

3.02 SILT FENCE

Silt fences are appropriate for the following general locations:

Immediately upstream of the point(s) of runoff discharge from a site before flow becomes concentrated. Below disturbed areas where runoff may occur in the form of overland flow.

Along the down slope toe of all top soil stock piles.

Materials.

Utilize standard strength synthetic filter fabric for sediment barriers. The filter fabric shall be purchased in a continuous roll cut to the length of the barrier to avoid the use of joints. When joints are necessary, filter cloth shall be spliced together only at a support post, with a minimum 6 inch overlap, and securely sealed.

The standard strength filter fabric shall be stapled or wired to the fence and 6 inches of the fabric shall be extended into the ground. Filter fabric shall not be stapled to existing trees.

Support posts shall be spaced at a maximum 6 feet and driven securely into the ground a minimum of 24 inches.

The height of a silt fence shall not exceed 36 inches. Higher fences may impound volumes of water sufficient to cause failure of the structure.

Maintenance.

Silt fences and filter barriers shall be inspected immediately after each rainfall and at least daily during prolonged rainfall.

Silt fences shall be inspected for depth of sediment, tears, and to see if the fabric is securely attached to the fence posts, and to see that the fence posts are firmly in the ground. Any deficiencies shall be repaired immediately.

Should the fabric on a silt fence of filter barrier decompose or become ineffective prior to the end of the expected usable life and the barrier still be necessary, the fabric shall be replaced promptly.

Sediment deposits should be removed after each storm event and/or when deposits reach approximately 1/3 the height of the barrier or when the sediments limit or prevent the flow of water through the fabric hydraulic.

Any sediment deposits remaining in place after the silt fence or filter barrier is no longer required shall be dressed to conform with the existing grade, prepared, and seeded.

3.03 STRAW BALE EROSION CONTROL BARRIER

A. Straw bale erosion control barriers are appropriate for the following general locations:

1. Sheet flow applications: Straw bales shall be placed in a single row, lengthwise on the contour with ends of adjacent bales tightly abutting one another.

2. Channel flow applications: Straw bales shall be placed in a single row, lengthwise and oriented perpendicular to the direction of flow with ends of adjacent bales tightly abutting one another. The barrier shall be extended to such a length that the bottoms of the end bales are higher in elevation than the top of the lowest middle bale to assure that sediment laden runoff will flow either through or over the barrier but not around it.

B. The barrier shall be entrenched and backfilled. A trench shall be excavated the width of a bale and the length of the proposed barrier to a minimum depth of 4 inches. After the bales are staked and chinked, the excavated soil shall be backfilled against the barrier. Backfill shall conform to the ground level of the downhill side and shall be built up to 4 inches against the uphill side of the barrier.

C. Each bale shall be securely anchored by at least 2 - 2x2 stakes or #4 rebar driven through the bale. The first stake in each bale shall be driven toward the previously laid bale to force the bales together. Stakes or rebar shall be driven a minimum of 12 inches into the ground or deep enough into the ground to securely anchor the bales, whichever is greater.

D. The gaps between bales shall be chinked (filled by wedging with straw to prevent water from escaping between the bales). Loose straw scattered over the area immediately uphill from a straw bale barrier tends to increase barrier efficiency.

2.04 MAINTENANCE.

A. Inspection shall be frequent and repair or replacement shall be made promptly as needed.

B. Straw bale barriers shall be removed when they have served their usefulness, but not before the upslope areas have been permanently stabilized.

END OF SECTION 312500

SECTION 321500 TRAILS, PATHWAYS, AND PADS

1.01 DESCRIPTION. Work includes constructing aggregate pathways, trails, and pads

PART 2 - MATERIALS

2.01 SURFACE COURSE

A. Provide material meeting the specification the requirements of D-1 aggregate Alaska DOT&PF Standard Specifications for Highway Construction 17th Edition http://www.dot.state.ak.us/stwddes/dcsspecs/assets/pdf/hwyspecs/sshc2017.pdf B. FP-14 Subsection 703.05(b); Table 703-2 Gradation D-1

2.02 BASE COURSE AGGREGATE

A. Provide hard, durable particles or fragments of stone, slag, or gravel conforming the following:

1. Gradation as shown in Table 321500-1

6. Durability index (coarse), AASHTO T 210 35 min.

9. Free from organic matter and lumps or balls of clay.

Do not use material that breaks up when alternately frozen and thawed or wetted and dried. Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.

Table 321500-1 Gradation Requirements for Base Aggregate

Sieve Size Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11)

Grading Designation

C

( ) The value in parentheses is the allowable deviation (±) from the target values.

PART 3 – EXECUTION

3.01 PREPARATION OF SUBGRADES

A. Establish subgrade as required and in conformance with Section 312300.

B. Prior to placement of any materials specified under this section, the subgrade shall be prepared by dressing, shaping, wetting or drying, and compacting. Obtain approval of compacted subgrades prior to final surfacing. Scarify, moisture condition, and recompact as required to achieve compaction.

C. Any ruts or soft yielding spots that may appear shall be corrected by loosening and removing unsatisfactory material and adding approved material as required, reshaping and recompacting the affected areas to the lines and grades indicated on the plans.

3.02 COMPACTION

A. Moisten or dry aggregate to uniform moisture content suitable for compaction.

B. Adjust the moisture content of the backfill material to a moisture content suitable for compaction. Compact all gravel by mechanical vibratory compactor over the full area of each layer until visual displacement ceases but no fewer than three complete passes. Compact each layer using appropriate compaction equipment until visual displacement ceases.

3.03 AGGREGATE FINISHING FOR WHEELCHAIR ACCESSIBLE SURFACE

A. All trails, pathways and pads are wheelchair accessible surfaces.

B. After compaction, water the aggregate surface thoroughly until the fines have completely settled from the surface. Then remove loose aggregate and dispose of offsite. Add or remove fine, angular material as necessary to provide a finished surface that is smooth, hard, and meets wheelchair accessibility standards and meets specified slopes and grades.

END SECTION 321500

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