Naha Trail_ProjectSpecs.pdf

SPECIAL PROJECT SPECIFICATIONS

Naha Trail Phase 2 Reconstruction Ketchikan Misty Fiords Ranger District, Tongass National Forest

Ketchikan, Alaska

Section 901—Abbreviations, Acronyms, Terms, and Definitions

901.01 Terms, Organizations, and Standards

(a) Specification Terms. These specifications are generally written in the imperative mood. In sentences using the imperative mood, the subject “the Contractor,” is implied. Also implied in this language is “shall,” “shall be,” or similar words or phrases. In material specifications, the subject may also be the supplier, fabricator, or manufacturer supplying material, products, or equipment for use on the project. Wherever “directed,” “required,” “prescribed,” or similar words are used, the “direction,” “requirement,” or “order” of the CO is intended. Similarly, wherever “approved”, “acceptable”,” suitable”, “satisfactory”, or similar words are used, they mean “approved by,” “acceptable to,” or “satisfactory to” the CO. The word “will” generally pertains to decisions or actions of the CO. Whenever in these specifications, or in other contract documents, the following terms (or pronouns in place of them) are used, the intent and meaning shall be interpreted as follows: reference to a specific standard, test, testing method, or specification shall mean the latest published edition or amendment that is in effect at the solicitation issue date for the public works contracts.

(b) Abbreviations and Acronyms

AASHTO American Association of State Highway and Transportation Officials AGGR Aggregate AQ Actual Quantities AS Aggregate Surfacing ASC Aggregate Surfacing with Corduroy ASTM American Society for Testing and Material AWPA American Wood Preservers Association BW Boardwalk CL Centerline CO Contracting Officer DQ Design Quantities EA Each Hr hour LF Linear Feet LS Lump Sum LSQ Lump Sum Quantities MW Miscellaneous Work NW No Work NBS National Bureau of Standards PS Product Standard issued by the U.S. Department of Commerce SHT Sheet SOD Stone Open Drain SP Stone Pitching SRS Stone Riser Steps SS Step Stones WCLIB West Coast Lumber Inspection Bureau WWPA Western Wood Products Association

901.02—Terms and Definitions

When the following terms, or pronouns in place of them, are used in these specifications or in other contract documents, the intent and meaning are as follows:

Base Course. The layer or layers of specified material of designed thickness placed on a trail bed to support surfacing.

Batter. A backward and upward slope of the face of a wall.

Berm. The ridge of material formed on the outer edge of the trail that projects higher than the tread.

Borrow. Suitable materials taken from approved sources designated on the drawings or on the ground, to be used for embankments and backfilling.

Bridge. A structure, including supports, erected over a depression or stream, and having a deck to carry traffic.

Catch Point. The outer limits of a trailway where the excavation and/or embankment intersect with the ground line.

Clearing Limit. The area over and beside the trail that is cleared of trees, limbs, and other obstructions.

Compacted. Consolidation that is obtained by tamping or rolling suitable material until no noticeable displacement of material is observed.

Contracting Officer (CO). An official of the Government with the authority to enter into, administer, and/or terminate contracts and make related determinations and findings. The term includes certain authorized representatives of the CO acting within the limits of their authority as delegated by the CO.

Cross-slope. The side-to-side slope of a trail tread.

Danger Tree. An unstable tree 5 inches or greater in diameter at breast height that is likely to fall across the trail.

Designated on the Ground. The location of materials, work areas, and construction items, including lines and grades, marked on the ground with stakes, flagging, tags, or paint.

Drawings. Documents showing details for construction of a facility, including but not limited to straight-line diagrams, trail logs, standard drawings, construction logs, plan and profile sheets, cross-sections, diagrams, layouts, schematics, descriptive literature, and similar materials.

Drain Dip. A dip in the running slope of a trail which also has an outslope built into it to allow water to collect and then drain downslope, away from the trail tread.

Duff. Organic material overlying rock or mineral soil.

Embankment. A structure of suitable material placed on the prepared ground surface and constructed to the trail bed elevation.

Excess Excavation. Material in the trailway in excess of that needed for construction of designed trailways.

Ford. A water-level stream crossing constructed to provide a level surface for safe traffic passage.

Full Bench. Trail bed constructed entirely on undisturbed material.

Grade. The vertical distance of ascent or descent of the trail expressed as a percentage of the horizontal distance.

Header Rock. Rock laid with the narrow end towards the face of the wall.

Inslope. Where the trail tread is sloped downward toward the backslope.

Mineral Soil. Soil or aggregate that is free from organic substances and contains no particles larger than 2 inches at their greatest dimension.

Outslope. Where the trail tread is sloped downward toward the embankment or daylight side of the trailway.

Running Slope. The lengthwise slope of a trail, parallel to the direction of travel (as opposed to cross-slope). The terms “running slope” and “grade” are often interchangeable.

Sideslope. The natural slope of the ground, usually expressed as a percentage.

Slough. That material from the backslope or the area of the backslope that has raveled onto the trail bed.

Slump. Where the trail bed material has moved downward, causing a dip in the trail grade.

Special Project Specification. Specifications that detail the conditions and requirements peculiar to an individual project, including additions and revisions to the standard specifications.

Surfacing. Material placed on top of the trail bed that provides the desired tread.

Suitable Material. Rock that can be accommodated in the trail structure, and soil free of duff with a recognizable granular texture.

Switchback. A reverse in direction of trail grade with a level landing used to change elevation on a steep slope, usually involving special treatment of the approaches, barriers, and drainages.

Trail bed. The finished surface on which base course or surfacing may be constructed. For trails without surfacing the trail bed is the tread.

Trailway. The portion of the trail within the limits of the excavation and embankment.

Tread. The surface portion of the trail upon which traffic moves.

Turnout. A short section of extra trail width to provide for passage of trail users.

Waterbar. A structure used for turning water off the trail, usually made of logs or stones.

Water Courses. Any natural or constructed channel where water naturally flows or will collect and flow during spring runoff, rainstorms, etc.

Section 902—Intent of Contract

902.01 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, trail log, and provisions of the contract.

The project has no available utilities. Camping is allowed in approved locations. See Section H.4 Use of Premises, b). and c). for camping and sanitation requirements.

This project has not been designed to be compatible with land-based motorized equipment such as small scale excavators and track haulers. See Section H.4 Use of Premises, d). Transportation, Access and Equipment for additional information.

The use of helicopters and water based motorized equipment in the project area is allowed.

Section 904—Control of Materials

904.01 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. Provide materials that are free from invasive species plant parts and seed.

Store materials to assure the preservation of their quality and fitness for the work. Locate stored materials to facilitate their prompt inspection. Restore all storage sites to a natural-appearing condition as approved by CO. Arrangements for storage on other than designated sites are the responsibility of the contractor.

Section 905—Quality Assurance and Quantity Measurement

Description

905.01 Work. Work consists of providing certification that the quality and quantity of construction conform to the drawings, specifications, and requirements of the contract.

Construction Meetings and Approvals

905.02 Scheduling

For all meetings and coordination listed below and elsewhere in the Specifications, provide 5 days notice of proposed schedule so the Government may coordinate response.

905.03 Trail Segment Construction Meetings.

Prior to beginning excavation and embankment activities for each 1000-foot-long trail segment, meet on site with the Government Representative to discuss particulars such as alignment, grading, drainage, waste disposal, and any other construction issues.

905.04 Aggregate Surfacing and Bedding Subgrade Approval and Drain Dips.

For Aggregate Surfacing and trail types that require bedding, obtain Government inspection and approval after subgrade preparation is complete and before placement of aggregate or bedding. Do not place aggregate until subgrade is approved unless subgrade preparation is generally approved under 905.07 as a representative sample. However, unique conditions may still require case-by-case government approval.

After subgrade preparation for Aggregate Surfacing, stake proposed locations of Ditches and Drain Dips where necessary to accommodate surface drainage. The required actual quantity of ditching and drain dips may be more or fewer than as shown on the trail log and locations may not be apparent until trail bed is prepped or trail is nearing completion. Review proposed ditch and drain dip locations with the government; obtain approval prior to installation unless the need is essential for minimizing erosion.

905.05 Staking for Approval.

Where staking for approval is indicated, provide a location stake for item in question with abbreviated label written on it, and notify Government for review and approval within 5 working days. Items to be staked for approval include:

- Ditches and Drain Dips

- Signs

905.06 Approval of Recycled Decking Material

See Specifications Section 913

905.07 Representative Samples.

At approved locations, prepare 10’ representative samples of each type of construction in this contract (example; 10 LF of Aggregate Surfacing, 10 LF of BW-A, etc.). Review representative samples with the government, correct any deficiencies, and obtain final approval before proceeding with any other work of that type. When accepted, the sample will be incorporated into the work. The representative samples will serve as a standard of workmanship and materials for other work on the project.

Construction

905.08 Certification and Measurements

(a) Offsite-Produced Materials. Furnish signed certificates, or certificates issued under supplier’s letterhead and executed by the manufacturer, supplier, or vendor, stipulating that all offsite-produced materials incorporated in the work meet applicable requirements SHOWN IN THE DRAWINGS or stated in the specifications. Furnish a certificate for each commodity or invoice. Examples include framing hardware and connectors, manufacturer’s wood treatment certification, certification of lumber grade, and supplier’s aggregate gradation sheet.

(b) Quantity Measurements. Submit quantities to the CO for periodic progress payments, and the CO will compute payments. Quantities are subject to verification.

Measurement

905.09 Method. There will be no separate measurement for this item.

Payment

905.10 Basis. Payment will be considered incidental to other pay items in this contract.

Section 906—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.

906.02 Determination of Quantities. The following measurements and calculations are to be used to determine contract quantities for payment:

Measure Aggregate Surfacing (AS), Aggregate Surfacing with Ditch (ASD), Ditching, Aggregate Surfacing with Corduroy (ASC), Aggregate Surfacing with Hevay Cleaering (ASHC) and Retaining Log (RL) in linear feet measured along the centerline and parallel to the specified grade. For ASD, measure length of ditch and length of AS separately; invoice each separately (as AS or as Ditch).

Measure Stone Riser Steps (SRS), Cut Rock Steps (CRS), Stone Open Drain (SOD), and Single Post Trail Map Signs as each. Measure Stone Pitching (SP), Solid Rock Removal (SRR) in linear feet measured along the centerline and parallel to the specified grade. Note that the Aggregate material used in the construction of these items will be incidental to these items and no additional payment will be made.

Measure Stone Retaining Wall (SRW) as square feet; length of retaining wall times average height of constructed face including stones buried upon completion of work. In as much as practicable without compromising integrity of work, leave all stones exposed until work is measured. Work with gov’t to schedule inspection and measurement. See also Section 905.02 Scheduling.

Measure Boardwalk Type A (BW-A), Boardwalk Type B (BW-B), Boardwalk Type C/CR (BW-C & BW- CR), and Boardwalk Bridge (BW-D) in linear feet measured along the centerline and parallel to the specified grade.

Measure Demolition and Removal or Recycling of Trail Structures, and Miscellaneous Work (MW) Naturalize Abandoned Trail Bed as lump sum.

Manufacturer’s tolerances will be accepted unless controlled by tolerances in the cited specifications.

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

(a) Cubic Yard (CY). Measurement by calculating volume in helicopter sling bags or other approved method.

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

(c) 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.

(d) Linear Feet (LF). Measurement in feet taken along the centerline of the trail and parallel to the finished grade.

906.04 Methods of Measurement. One of the following methods of measurement for determining final payment is DESIGNATED ON THE SCHEDULE OF ITEMS for each PAY ITEM:

(a) Designed Quantities. These quantities denote the final number of units to be paid for under the terms of the contract. They are based upon the original design data available prior to advertising the project.

Original design data include the preliminary survey information, design assumptions, calculations, and drawings. Changes in the number of units DESIGNATED IN THE SCHEDULE OF ITEMS may be authorized under the following conditions:

(1) As a result of changes in the work approved by the CO.

(2) As a result of the CO determining that errors exist in the original design that cause a PAY ITEM quantity to change by 15 percent or more.

(3) As a result of the contractor submitting to the CO a written request showing evidence of errors in the original design that cause a PAY ITEM quantity to change by 15 percent or more.

The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is believed to be in error.

(b) Actual Quantities (AQ). These quantities are determined from measurement of completed work or certified receipts.

(c) 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.

(d) Vehicle Quantities (VQ). These quantities are measured or weighed in hauling vehicles. Aggregate woven bags are considered hauling vehicles.

Section 907—Mobilization

907.01 Work. 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.

Payment

907.02 Basis. Pay for the accepted work at the contract unit price for the PAY ITEM SHOWN IN THE

SCHEDULE OF ITEMS.

Make progress payments for mobilization as follows:

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

(b) 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.

(c) 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.

(d) Pay any unpaid amount for mobilization upon final acceptance of all work items.

Make payment under:

PAY ITEM PAY UNIT

907 (01) Mobilization .............................................................. LS

Section 908—Construction Staking, Flagging, and Cleanup

908.01 This work consists of establishing any control points needed in addition to existing staking, and removing and disposing of all construction stakes, tags, flagging, and plastic ribbon from the project area

Protect all trees and related steel posts, caps, nails, and flagging associated with Orton Ranch property boundary, generally located beyond STA 111+46. See also Section H.3 Use of Premises, c).

908.02 General. The Government will field stake the beginning stations for work areas listed in the Trail Log in Section J. Before constructing the trail over a stake, relocate the stake in a visible location 90 degrees to the trail centerline and outside the construction limits. Maintain stakes until the project has been accepted by the Government.

Furnish and maintain additional stakes, flagging, templates, batter boards, and other materials and supplies necessary for marking and maintaining points and lines established. Do not perform work in the absence of control points. If any construction control points are destroyed, displaced, or erroneous, notify the CO.

Uniformly contour alignment and construct grade from control point to control point.

Remove all construction stakes, tags, flagging, and plastic ribbon from the project area within 7 days after the final inspection of all other work on the project. Dispose of all tags, flagging, and plastic ribbon off Government-administered lands; unless directed otherwise, stakes may be scattered by tossing into woods out of sight of trail.

908.03 There will be no separate measurement for this item.

908.04 Trail staking, flagging, and cleanup will be considered incidental to other pay items in this contract, and additional payment will not be made.

Section 909—Maintenance for Traffic

909.01 General. Before any suspension of work, take precautions necessary to prevent damage to the project, such as temporary detours, approaches, crossings, or intersections, and make provisions for normal drainage and to minimize erosion.

The Naha Trail will remain open to the public during trail demolition and construction, except during helicopter operations over the trail or while other construction hazards are present. The contractor is responsible for managing trail closures and installing effective trail closure signage and warnings to the public. When trail is closed, provide “trail closed” signs; one near the saltwater dock and the other at the Day use Shelter accessed from Naha Bay. All signs are to be clearly legible and professional appearing.

Provide a notification of closure times to the CO 3 calendar days minimum prior to the closure.

Measurement

909. 02 There will be no separate measurement for these items.

Payment

909. 03 Maintaining the trail for public access and providing temporary construction access will be considered incidental to other pay items in this contract, and additional payment will not be made.

Section 911—Clearing and Grubbing

911.01 Work. Work consists of clearing, grubbing, trimming, removing, and treating trees, logs, limbs, branches, brush, plants, and other vegetation within 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.

911.02 Clearing Limits. Clear brush to the dimensions 36 inches each side of the trail centerline. Clear trees designated to be removed within 36” of trail centerline.

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 live brush, herbaceous plants, and trees between the trailway and clearing limits that are less than 12 inches in height and less than ½ inch diameter at ground line.

Except as provided above, cut all limbs and branches within 7 feet of the ground and more than 1/2 inch in diameter that extend into the clearing limits. Cut tree limbs flush with the outside of the branch collar and cut brush at the ground surface. Trim roots protruding from cut slopes flush with ground level.

911.04 Damaged Trees. When felling, cutting, trimming, or setting tailholds, do not cause bark damage to standing timber. If damage does occur to standing trees, treat the injured trees in an approved manner.

Remove and dispose of trees with major roots exposed and rendered unstable by construction activities.

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

Scatter products of clearing and grubbing in approved locations outside the clearing limits and out of sight of the trail.

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.

911.06 Method. There will be no separate measurement for this item.

911.07 Basis. Clearing and Grubbing will be considered incidental to the pay item under which the work is being done, and additional payment will not be made.

Section 912—Excavation and Embankment

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 trail bed, ditches, backslopes, and fill slopes.

912.02 Use and Disposal of Excavated Material. Conserve and use soil and herbaceous vegetation and moss removed during excavation to revegetate excavated areas to provide a neat appearance and to control erosion. For soil placed on slope shoulders for Types AS, ASC, ASR, ASHC and ASD, use soil from the project area that is free of debris larger than 2” in any dimension. Do not import topsoil unless it has been treated in a manner that has been proven to kill foreign weed seeds.

Place excess and unsuitable excavation beyond the downslope edge of the trail bed, except in locations where the material would be placed within 5’ of a stream or in staked locations where it is desirable not to impact the native vegetation; in these locations place in approved locations. Do not obstruct drainage and spread to a depth not exceeding 4 inches. This includes any material removed in the grubbing operation and deposited in the same area.

Place rocks over 4 inches 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 inches lower than the trail bed surface. Ensure that no blockage of drainage or creation of a windrow effect occurs.

912.03 Trail bed Preparation. Remove soil to the depth required to accommodate the aggregate surfacing, and corduroy material if required, and provide the finished grades specified on the drawings.

Retain roots over 2” diameter except where approved by CO for removal.

912.04 Trail bed Approval. Obtain approval of trail bed prior to placing corduroy, aggregate surfacing, stone riser steps, or stone pitching. At time of approval, the Government may designate other particular locations for placement of aggregate or corduroy.

912.05 Cut and Fill Slopes. Construct trail so cut and fill slopes are less than the angle of repose. Trim exposed roots flush with the finished cut slope.

912.06 Method. There will be no separate measurement for this item.

912.07 Basis. Excavation and embankment will be considered incidental to the pay item under which the work is being done, and additional payment will not be made. Rehabilitation and naturalization of disturbed areas not addressed under Miscellaneous Work will be considered incidental to the pay item under which the work is being done, and additional payment will not be made.

Section 913 — Demolition and Removal or Recycling of Trail Structures

DESCRIPTION

913.01 Work.

This work includes the demolition and removal or recycling of all existing wood trail structures within the project area, including boardwalk and wood staircase structures.

CONSTRUCTION

913.02 Demolition and Removal of Boardwalk Material not designated for Recycling.

Demolish and remove all planks, sills, posts, hardware, etc. that are not designated for recycling and dispose of off National Forest Lands.. .

913.03 Selection of Recycled Decking Material.

Mark planks or posts proposed for use as recycled material and obtain approval prior to moving the material to the work area.

Recycled planks may be selected and approved from anywhere on the project area.

Select recycled material according to the following criteria:

1). Longest remaining serviceable life 2). Minimum defect such as splits and cracks 3). Appropriate lengths

913.04 Demolition and Removal of Existing Signs.

Demolish and remove posts and hardware. Dispose of treated wood members and hardware off National Forest Lands. Log posts may be disposed of on site out of view from the trail. Preserve signs and deliver to a location in or near Ketchikan yet to be determined.

MEASUREMENT

913.05 Method.

Trail structures for removal or recycling will be measured in accordance with Section 906.

PAYMENT

913.06 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.

913(01) Boardwalk demolition; mixed salvage and disposal ..................LF

Section 930 — SOLID ROCK REMOVAL

930.01 Work.

Solid Rock Removal (Type SRR) consists of creating a trail surface from sloping solid rock, mucking out excavated areas and finishing the exposed bedrock to provide a finished trail surface and installing Aggregate Surfacing where the finished bedrock surface is not suitable. Cut Rock Steps (CRS) consists of creating a stepped tread trail surface from the surface bed rock.

MATERIAL

930.02 Contractor to select materials for solid rock removal upon inspection of work areas specified in trail log.

Method of removal to be approved by CO prior to construction.

930.03 Solid Rock Removal (SRR) and Cut Rock Steps (CRS).

Provide a uniform tread surface that is free draining and provides a suitable walking surface as approved.

Treat surface to remove tool marks and provide a natural appearing surface, as approved.

If tread cannot be made to provide a suitable walking surface, install Aggregate Surfacing as approved.

941.04 Representative Sample. Prepare a 10’ representative sample of Solid Rock removal (SRR), and 1 Cut Rock Step (CRS) at an approved location that will serve as a standard of workmanship and materials for other work on the project. Obtain review of the representative sample, correct any deficiencies, and obtain final approval before proceeding with like work. When accepted, the sample will be incorporated into the work.

MEASUREMENT

930.05 Method. Measure in accordance with Section 906.

930.06 Basis. Pay for the accepted quantities in accordance with Section 906. Payment for Type AS and Type CRS and SRR is incidental to Type CRS/SRR and no additional payment will be made

PAY ITEM PAY UNIT

930(01) Solid Rock Removal (Type SRR) …………………………...............EA

930(02) Cut Rock Steps (Type CRS) ………………………….......................EA

Section 937—Timber Structures

937.01 Work. This work consists of constructing Boardwalk Type A (BW-A), Boardwalk Type B (BW-B), Boardwalk Type C (BW-C), Boardwalk Type CR (BW-CR), Boardwalk Bridge (BWB), and selection of timber for Retaining Logs (RL) and Post Trail Map Sign Base. Install sign base where designated by CO near Hill Lake Bridge.

Materials

937.02 Retaining Logs, and Signposts. Collect and transport Alaska Yellow Cedar in the round from locations out of sight of the trail and in accordance with Section H, Government Furnished Materials.

Timber shall be free from shake and rot. Peel bark from all members.

937.03 Lumber for boardwalk. Provide Hem-Fir, Grade #1 or better, nominal dimension or approved equal. Preservative treatment shall be in accordance with the current American Wood Protection Association (AWPA) specifications using the treatment materials listed below. Treatment shall comply with the requirements of the current edition of Western Wood Preservers Institute (WWPI) “Best Management Practices for the use of Treated Wood in Aquatic Environments”.

Deck boards, handrails, and rim joists:

Alaska Yellow Cedar (AYC), no preservative treatment required.

All other wood members in contact with the ground:

AWPA Use Category System (U1) for use category 4B Ground Contact – Heavy Duty (UC4B).

Pentachlorophenol in biodiesel (FP9).

Other treatments meeting the standards of AWPA and WWPI and available locally may be considered for approval as substitutions if the materials specified above are unavailable due to COVID-19-related supply shortages. Low-odor treatments are preferred. Submit proposed substitutions for approval by CO.

937.04 Selection of Recycled Decking Material.

Set aside planks of proposed recycled material and obtain approval from CO prior to moving the material to the work area. Once a mutually-agreeable standard has been established by these initial inspections, proceed with remaining recycling work following those standards and no further approvals will be required.

Do not recycle sill material.

Recycled decking may be selected/approved from anywhere on the project area.

Select recycled material according to the following criteria:

1). Longest remaining serviceable life 2). Minimum defect such as splits and cracks 3). Appropriate lengths

937.05 Hardware. For lag screws, bolts, washers and nuts used for sign construction, provide galvanized hardware meeting ASTM A153. For nails, provide Grade 304 stainless steel annular ring shank nails.

Use cut washers under bolt and lag screw heads and nuts.

937.06 Boardwalk Fasteners

Provide nails as and where described below. For joist hangers, use manufacturer recommended fasteners.

FASTENER SCHEDULE

937.07 Non-Skid Surface.

Use nylon salmon seine net, 3-1/4"x #60 100MD DB&T BRD, as available from Seattle Marine, 1-800--426- 2783 or 206-285-5010 (Attn: Mike Nord), or approved equal.

937.08 Boardwalk. Miter decking joints at sills to achieve a tight fit. Leave 1/2" gap between decking planks. Install planks crown side up and selectively match adjacent planks to ensure a maximum elevation difference of 1/4". If boards contain wane, place the wane side down.

937.09 Deck Nailing. Drive two nails through deck boards at each stringer intersection. Drive the nails at opposing angles, approximately 20 to 30 degrees measured from the vertical. Angle the nails to run parallel with the stringers. Install the nails far enough in from edges of deck boards so as not to split the board.

Predrill the boards if splitting is encountered. Do not leave any board in place that was split during installation.

937.10 Non-skid.

Cover all boardwalk surfaces. Attach with ½” Arrow stainless steel or monel rustproof staples, 6” o.c.

Stretch net over sides and staple to sides/end and on surface of planks to securely hold down net and provide a neat appearance. Staple edges 3” on center minimum, and staple to decking (inside of stapled edges) at rate of approximately 5 staples per square foot. Use stapler type capable of providing accurate placement and full embedment. Do not staple on end grain.

937.11 Preservative Treatment. Field treat using Copper Naphthenate (2% solution) all areas hewn, notched, cut, or drilled after initial preservative treatment. Carefully trim or sand to a smooth surface and apply three brush coats of the field treatment solution. Where field drilling of bolt or nail holes is required, fill holes with preservative prior to inserting the fasteners.

937.12 Method. Measure in accordance with Section 906 and the following:

937.13 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.

Connection Fastener Size Location Quantity

TYPE A

Boardwalk Decking to stringer or sill

Ring Shank Nails 3-1/2” Decking into stringer or sill

2 per stringer or 4 per sill

Stringer to sill or to underlying decking

(BW-B, BW-D)

Ring Shank Nails 6” Toenail beam to sill, stagger sides

4 per sill, stagger sides

Stacked sills Ring Shank Nails 3-1/2” Connect stacked sills together

4 per sill piece

937(01) Single Post Trail Sign Base...….………..…….............EA

937(02) Boardwalk Type A, (BW-A) …...…………………..........LF

937(03) Boardwalk Type B, (BW-B) …...………………....…......LF

937(04) Boardwalk Type C, (BW-C) …...………………....…......LF

937(05) Boardwalk Type CR, (BW-CR) …...………………....….LF

937(06) Boardwalk Type D, (BW-D) …...………………....……...LF

937(07) Retaining Log (RL)........................................................LF

Section 938 – Pile Foundation

938.01 Work. Work consists of constructing steel pipe pile foundation for the placement of elevated boardwalk. The contractor will furnish all materials necessary for the construction of foundation as shown on the drawings.

Materials

938.02 Hardware: All hardware will be hot dip galvanized as per ASTM 153. Bolts will be ASTM A307.

Nuts will be ASTM A563 or ASTM A194 grade 2H. Washers (flat or beveled) ASTM F436. All thread rod will be stainless steel (ASTM A304).

938.03 Galvanizing Treatment: All nails, bolts, nuts, washers, will be hot dipped galvanized as per ASTM A153. steel connectors may also be galvanized per ASTM A653 (ZMAX-G185)

938.04 Steel Pipe & Piling: 2-1/2" ∅ schedule 40, A53, galvanized

938.05 Steel Beam Saddles: Chance Civil Construction, walkway support bracket, #C110-0682, hot dip galvanized. Or approved equal.

938.06 Pile Driving: Piling will be driven to refusal by hand or machine. If hand driven, a minimum of a 150 pound slide hammer dropping 3' will be acceptable. If machine driven, a minimum energy rating of 300 foot/pounds is required. 90 pound pavement breaker or jack hammer class is acceptable. Refusal is defined as more than 20 blows to the inch with slide hammer. Refusal is defined as no visible movement with a machine. Engineer to be present at all installations of piling.

Construction

Construct according to the drawings and specifications.

Measurement

938.07 Method. There will be no separate measurement for this item.

Payment

938.08 Basis. Foundation construction will be considered incidental to other pay items in this contract, and additional payment will not be made.

Section 941—Aggregate and Stone Construction

941.01 Work. This work consists of preparing the trail bed and furnishing, hauling, and placing Aggregate Surfacing (Type AS), Aggregate Surfacing with Corduroy (Type ASC), Aggregate Surfacing with Ditch (Type ASD), Ditching, Stone Retaining Wall (SRW), Step Stone (SS), Stone Pitching (Type SP), Stone Open Drain (SOD), and Stone Riser Step (SRS).

Materials

941.02 Corduroy. Use dimensional lumber from recycled boardwalk that is abandoned by work on this project and is not usable for other purposes, including decking, sills, and other members. Remove all unused pressure treated boardwalk material from project and dispose of offsite.

941.03 Handling Materials. Stockpile, remove, transport, and spread aggregates in a manner that will preserve specified gradation and avoid contamination. Do not transport materials to project site that have soil, debris, or a substance adhered to it that could contain seed or vegetative matter from an offsite location.

941.04 Seed-Free Aggregate. Provide aggregate and stone materials that are free of viable seeds or vegetative material. Ensure that contamination does not occur from equipment and tools used to handle aggregate and stone or to construct trail. Prior to moving equipment to worksite, thoroughly wash all equipment and tools that will be used at the work site, to remove all soil, debris, and other material that could contain seed or vegetative material. Use only aggregate and stone from an active stockpile or other source that is approved by the CO as being weed free. Provide notification one week before moving material from the source facility to allow inspection by the CO. Do not place any construction material on site that has soil, debris, or other substance adhered to it that could contain seed or vegetative matter from an offsite location.

941.05 Aggregate Surfacing and bedding material. Provide aggregate surfacing meeting the specification Subbase B (1-1/2” minus crushed rock) in the FP-14 Standard Specifications for the Construction of Roads and Bridges on Federal Highway Projects.

941.06 Approval for Aggregates and Stone. Provide supplier’s gradation sheet for Aggregate Surfacing and make available for inspection the various other stone materials at the source facility for approval prior to moving to project site. Approval will be granted based upon conformance with size and shape requirements.

941.07 Required Stone Sizes and Shapes. Hand select native stones from offsite sources to provide the general shape and dimensions shown on the drawings. Stones to be sound and durable.

Select stone that meets the following size and shape requirements:

Step Stone (SS)

Stone to be sourced locally, select stones per best fit to parameters below. Get approval from CO If another rock source is needed to complete the work.

Shape must be suitable for constructing a stable step stone.

2.25 square feet minimum flat top step surface, height sufficient to provide finished installation with 2” min. clearance above high tide lagoon water level.

Stone Riser Step (SRS)

2.5 cubic feet minimum volume Construct steps primarily from single stones, however two stones may be used if fit tightly together and are each 1.5 cubic foot min. size.

A shape suitable for constructing a stable step A generally flat top surface suitable for a 8” min. width step tread

Stone Pitching (SP) surfacing

Slopes < or equal to 35% .3 cubic foot minimum volume 4” min. thickness over at least 2/3 of the stone’s area A generally flat top surface that is suitable for a walking surface

Stone Pitching (SP) Steps

Slopes > 35%

1.5 cubic foot minimum volume, unless approved by CO. Construct steps primarily from single stones, however two stones may be used if fit tightly together and are .75 cubic foot min. size.

A shape suitable for constructing a stable step A generally flat top surface suitable for a 6” min. width stair tread

Stone Open Drain (SOD) Side Stones

3 cubic foot minimum volume 24” inches minimum length, 36” maximum 12 inches minimum width 14 inches minimum height Select stones for fit and a generally flat top surface for stepping on.

Stone Bench (for Rest Areas)

3 cubic foot minimum volume

1.5 square foot minimum flat seat area May be made from a single or multiple stones meeting the minimum size requirements Height of flat seat area above top of aggregate surfacing: 18” ± 1” Select and place stones for reasonably flat top for seating and reasonably tight fit against each other

941.08 Trail bed Preparation and Approval. See Specification 912.03.

941.09 Corduroy. Place corduroy on a prepared trail bed which provides full support for corduroy member. Place corduroy boards perpendicular to trail’s line of travel. Place so corduroy boards are tight together. Fit corduroy around retained roots.

941.10 Handling of Aggregate. Do not place aggregate directly on the ground outside of the trailway without a tarp or some other means of separation. Do not allow the aggregate to become contaminated by seeds.

941.11 Compaction and Finished Grading. For Aggregate Surfacing (AS), compact firmly by hand.

Following final spreading, smoothing and compaction, correct any irregularities or depressions that develop by adding or removing material until the surface is smooth and uniform.

941.12 Drainage Dip. Construct drainage dips at locations described in the trail log or designated on the ground. Remove all debris from the lead-off area of dips that restricts the free flow of water away from the trail.

941.13 Acceptance, Testing, Sampling, and Tolerances. Provide the minimum compacted thickness of aggregate surfacing shown in the Drawings. If excess aggregate has been delivered to the work area it may be stockpiled in approved locations or spread evenly over the trail; the method to be approved and at no cost to the Government.

941.14 Representative Sample. Prepare a 10’ representative sample of Stone Pitching (SP), Stone Retaining Wall (SRW), two Stone Riser Steps (SRS), 1 Cut Rock Step (CRS), 1 Step Stone (SS), and 1 Stone Open Drain (SOD) at an approved location that will serve as a standard of workmanship and materials for other work on the project. Obtain review of the representative sample, correct any deficiencies, and obtain final approval before proceeding with like work. When accepted, the sample will be incorporated into the work.

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

941.16 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. The Aggregate Surfacing used in the construction of all trail types other than Aggregate Surfacing (AS) will be incidental to those items and no additional payment will be made. Construction of drainage dips is incidental to the cost of AS trail construction and no additional payment will be made.

941(01) Aggregate Surfacing (Type AS) ..................................................... LF

941(02) Aggregate Surfacing with Corduroy (Type ASC) …………..........…LF

941(03) Aggregate Surfacing with Corduroy (Type ASFB) …………............LF

941(04) Aggregate Surfacing with Corduroy (Type ASHC) …………...........LF

941(05) Ditching....………………….……..…………….……..........................LF

941(06) Drainage Dip....………………….……..…………….……..................LF

941(07) Step Stones (Type SS) …………………………..............................EA

941(08) Stone Riser Step (Type SRS) ………………………….....................EA

941(09) Stone Retaining Wall (Type SRW) ……………...………..................SF

941(10) Stone Open Drain (Type SOD) ……………….…..………................EA

941(11) Stone Pitching (Type SP) ………………….……..……………..……..LF

Section 980—Miscellaneous Work (Naturalize Abandoned Trail bed)

980.01 Work. Work includes scattering vegetative debris from adjacent areas over abandoned trail bed as a mulch to conceal the abandoned route, discourage continued hiker use, and to protect against the erosive force of rain. Work shall be performed where abandoned trail bed is visible from new trail for areas identified in the Trail Log.

980.02 Naturalize Abandoned Trail bed.

Where necessary or as directed by CO to prevent or reverse the effects of erosion, fill and/or regrade abandoned trail bed. Use native soil from onsite locations as approved.

Concentrate work at each end of abandoned trail segments where they join the reconstructed trail, and on any intermediate segments where erosion is a clear concern as identified by the CO. At junctions of new and abandoned trail, scatter branches, logs, and similar material as approved to block hikers and conceal route from view.

Use herbaceous vegetation, leafy branches pruned during the course of work, punk, and moss conserved from nearby excavation for new trail to scatter over portions of abandoned trail bed visible from new trail.

MEASUREMENT

980.03 METHOD

Naturalization of abandoned trail bed will be measured in accordance with Section 906. Excavation and grading associated with this work item will be considered incidental and no additional payment will be made.

980.04 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.

980(01) Naturalize Abandoned Trail bed.………........….………..…….....LS

H.1 Archaeological or Historic Sites (The following is in addition to AGAR Clause 452.236- 73 Archaeological or Historic Sites (NOV 1996).

This area does not contain known historic properties. If a previously unidentified archaeological or historic site(s) is encountered, the contractor shall discontinue work in the general area of the site(s) and notify the contracting officer immediately.

H.2 Order of Precedence – Requirements, Specifications & Drawings

Any inconsistency in the specifications of this solicitation and any resultant contract shall be resolved by giving precedence in the following order:

a). Section H – Special Contract Requirements b). Contract Drawings (Section J) 1). Drawings, figured dimensions over scaled dimensions 2). Drawings, large scale drawings over small scale drawings 3). Schedules on drawings over notations on drawings c). Section C – Specifications 1). Special Project Specifications 2). Reconstruction Trail Logs 3). Standard Specifications d). Staking on the ground e). Forest Service Standard Specifications for Construction and Maintenance of Trails, September 1996

H.3 Landscape Preservation

a) No foot traffic or movement of materials or equipment is allowed over uncompleted and unprotected portions of the trail. In areas requiring trail abandonment and rehabilitation, workers shall walk away from the abandoned trail centerline, dispersing their travel route, to avoid damage to the protective surface vegetation. When working within trail corridor to be developed, workers shall walk on the centerline of proposed trail so damage will be covered by new trail construction. Rehabilitate and naturalize sites where required to prevent or reverse erosion by regrading the ground contours and spreading organic debris found locally (e.g., punk, and green hemlock boughs) as mulch to protect bare soil from the erosive force of rain to the extent practicable.

b). Operations shall be scheduled and conducted to minimize erosion of soils and to prevent silting and muddying of streams and rivers.

Pollutants such as raw sewage and other harmful materials shall not be discharged into or near streams and rivers or into natural or manmade channels leading thereto.

Waste motor oil, fuel, lubricant, bitumen and similar hydrocarbons shall be collected and returned to the supplier. They shall not be wasted on the ground or buried.

c). Stockpile aggregate and other materials in approved locations. Thoroughly remove all stockpiled material immediately after the use of that stockpile is complete. Restore stockpile sites to a natural-appearing condition.

H.4 Use of Premises a). A survey boundary tree is located near the trail by STA 111+46 marking a property boundary line between Ketchikan Indian Community (KIC) and Forest Service lands. These are identifiable by posted signs. These trees and any related steel posts, caps, nails, and flagging must be protected from damage, and work is not to occur beyond this boundary. If additional survey markers are discovered which were not previously identified, inform the CO as soon as practicable and protect them from damage.

b). Before any camp, storage area, or access is opened or operated on National Forest land, written permission shall be obtained through the Contracting Officer. A camp includes the campsite of any employee working for the Contractor. Such permission, if granted outside the boundaries of a public use facility, will be without charge to the Contractor. The Contractor will follow all rules and regulations specific to the use of the National Forest. Campsite occupancy will be permitted for duration of work plus 14 days mobilization and 7 days cleanup time, as approved.

Provide proposed location(s) for campsites for approval prior to any ground disturbing activities. Camping will not be allowed within an archeological site.

Provide a plan for camp development, occupation, and clean-up and obtain approval prior to any camp development activities. The plan should contain the following information:

1. Layout and location of the proposed camp.

2. Number of users and dates of occupancy.

3. Sewage and waste disposal systems.

4. Layout of cooking, sleeping and common areas.

5. Camp trails layout.

6. Equipment and fuel storage area and Spill Prevention Control and Countermeasure (SPCC) plan.

7. Fire prevention and control plan.

8. Site Restoration plan.

9. Mobilization plan including helicopter and/or boat operations if relevant to camp setup, removal, or use.

The Government shall review the Contractor's plan as submitted for completeness and applicability.

Proposed modifications of Contractor's plans will be discussed with the Contractor prior to approval.

Alternatively, camping is allowed for up to 14 days or as approved at Ohmer Creek Campground on an…