SectionC_AdditionalWorkStatement.pdf

Ship Cove Trail Restoration

Sitka Ranger District, Tongass National Forest

SECTION C –

Further Details to Description/Specifications as noted in the Solicitation.

C.1 PROJECT DESCRIPTION AND LOCATION

Description: This project will restore a segment of the historic Ship Cove Trail and construct a new spur trail leading to a new trailhead location on Ship Cove. Major work items include trail clearing and grubbing in a manner to preserve the existing historic puncheon structures, Aggregate Surfacing, Aggregate Surfacing with Retainer Log, Puncheon Trail, Double Log Bridges and Signs. The trail centerline has been staked and marked with blue flagging at each Work Area and at points along the centerline.

The Base Bid includes all work on the main trail from Back Bay to Ship Cove (STA 0+00 thru

STA 14+92).

The Option Item #1 includes all work on the spur trail, (STA 0+00 thru STA 3+49)

Location and Facilities: The trail Station 0+00 is located .6 mile NW from the main dock in Port Alexander, Alaska at approximate lat/long 56.25, -134.65. Port Alexander is located near the southern tip of Baranof Island and is accessible by floatplane or boat. Cell phone service is not available but wireless internet is available in the community.

Camping is allowed in approved locations.

(a) Price Range: Total estimated value between $250,000 and $500,000.

(b) Pre-bid Tour: No pre-bid tour is planned.

(c) Period of Performance: April 29, 2024 to October 31, 2024

(d) Government-Furnished Property: (For details see Section H, Government Furnished Materials): One beach marker sign.

C.2 TECHNICAL SPECIFICATIONS

(a) The technical specifications included in Section J are hereby made part of this solicitation and any resultant contract.

(b) The following specifications (including Region 10 Specifications and Special Project Specifications) are hereby made a part of this solicitation and any resultant contract:

1. FOREST SERVICE STANDARD SPECIFICATIONS FOR CONSTRUCTION OF TRAILS

AND TRAIL BRIDGES ON FOREST SERVICE PROJECTS, 10/30/2014. Note that this version supersedes EM-7720-103, Standard Specification for Construction and Maintenance of Trails (1996).

Copies of the Forest Service Specifications can be purchased from:

Government Printing Office, 915 Second Ave. Seattle, WA 98174, (206) 553-4270.

Or may be viewed online at:

https://www.fs.usda.gov/sites/default/files/trail-specifications.pdf https://www.fs.usda.gov/sites/default/files/trail-specifications.pdf

C.3 Special Project Specifications are as follows:

Section 901—Abbreviations, Acronyms, and Terms

Section 902—Definitions

Section 903—Intent of Contract

Section 904—Maintenance for Traffic

Section 905—Control of Materials

Section 906—Measurement and Payment

Section 907—Quality Assurance and Quantity Measurement

Section 908—Mobilization

Section 910—Clearing and Grubbing

Section 912—Excavation and Embankment

Section 938—Timber Materials

Section 941—Aggregate Surfacing

Section 951—Signs

SECTION 901—ABBREVIATIONS, ACRONYMS, AND TERMS

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 ASTM American Society for Testing and Material AWPA American Wood Preservers Association CL Centerline CO Contracting Officer DQ Design Quantities EA Each FBB Full Bench Blasting 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 RA Rest Area SHT Sheet SOD Stone Open Drain SP Stone Pitching SRS Stone Riser Steps SRW Stone Retaining Wall SS Step Stones WCLIB West Coast Lumber Inspection Bureau WWPA Western Wood Products Association

SECTION 902—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 trailbed 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.

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.

Duff. Organic material overlying rock or mineral soil.

Embankment. A structure of suitable material placed on the prepared ground surface and constructed to the trailbed 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. Trailbed 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.

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 trailbed.

Slump. Where the trailbed 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 trailbed 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.

Trailbed. The finished surface on which base course or surfacing may be constructed. For trails without surfacing the trailbed 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 903—INTENT OF 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.

Due to the fragile nature of what remains of the historic trail, no ground-based construction equipment such as haulers or excavators are allowed. The use of helicopters in the project area is allowed.

SECTION 904—MAINTENANCE FOR TRAFFIC

904.01 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 trail under this contract will be closed to the public until the project is complete. The contractor is responsible for installing professional-appearing, effective trail closure signs and warnings to the public.

When trail is closed, provide “trail closed” or “trail closed ahead” signs at the main trailhead and at STA 0+00. Provide barriers at STA 0+00. Provide verbal warnings to the public when the trail and staging area are closed.

SECTION 905—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.

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.

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 Determination of Quantities

The following measurements and calculations are to be used to determine contract quantities for payment:

Mobilization – Measure as Lump Sum

Aggregate Surfacing (Type AS) – Measure in Linear Feet measured along the centerline of the finished trail.

Aggregate Surfacing with Retainer Log (Type AS-RL) – Measure in Linear Feet measured along the centerline of the finished trail.

Split Puncheon - Measure in Linear Feet measured along the centerline of the finished trail

Double Log Bridge (Type DLB) - Measure in Linear Feet measured along the centerline of the finished trail.

Log Riser Step (Type LRS) Measure as Each.

Signs (Type Sign) – Measure as Each.

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

(b) Lump Sum (LS). 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 trail and parallel to the finished grade.

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

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 (LS). 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—QUALITY ASSURANCE AND QUANTITY MEASUREMENT

Description

907.01 Work

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

Construction

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.

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

907.03 Construction Meetings and Approvals

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

Trail Segment Construction Meetings.

Prior to beginning excavation and embankment activities for the trail, hold an on-the-ground meeting with the Government Representative to discuss particulars such as alignment, grading, drainage, waste disposal, and any other construction issues.

Aggregate Surfacing Subgrade Approval 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.

Representative Samples.

Prepare 10’ long representative samples of Aggregate Surfacing. Obtain review of the representative samples, 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.

Measurement and Payment

907.04 Method

Payment will be considered incidental to other pay items in this contract. There will be no separate measurement for this item.

SECTION 908—MOBILIZATION

908.01 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

908.02 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.

SECTION 910—CLEARING AND GRUBBING

910.01 Work

Work consists of brushing, clearing, and grubbing vegetation as described herein.

910.02 Clearing Limits

Clearing limits are 3 feet minimum each side of trail centerline. The Government may flag trees to remain within the clearing limits.

910.03 Material to Be Cleared and Grubbed and Disposal of Cleared and Grubbed material Cut brush and trees less than 4” dbh. Leave trees larger than 4” dbh located outside the trailway standing except if they hinder passage, as approved. Cut tree 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

910.04 Danger Trees

Fall trees that are determined to be danger trees by CO. Clean up as provided in 910.03.

910.05 Method

SECTION 912—EXCAVATION AND EMBANKMENT

912.01 Work.

Work consists of hand-excavating for the installation of Aggregate Surfacing, Aggregate Surfacing with Retainer Log, Log Riser Steps, and Double Log Bridges.

912.02 Work

This historic trail was mostly constructed from hand-split Yellow Cedar puncheon that has settled and become covered with organic matter and vegetation over the years. This project will leave this puncheon material in place (except where specified otherwise in the Trail Log). Where this puncheon exists remove the soil and vegetation that has accumulated and place the aggregate on the exposed puncheon.

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.

Place excavated material beyond the downslope edge of the trailbed, 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.

Where no puncheon exists, remove organic soil to the depth required to accommodate the aggregate surfacing and provide the finished grades specified on the drawings.

Obtain approval of trailbed prior to placing aggregate surfacing.

912.03 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.

912.04 Method

SECTION 938—TIMBER MATERIALS

938.01 Work.

Work consists of providing materials for split-faced puncheon, double log bridges and sills, retainer logs, and signposts.

Materials

938.02 Species

For all split-faced puncheon, double log bridges and sill, and sign posts use old-growth Alaska yellow cedar. For retainer logs, any native species of suitable size may be used.

938.02 Provide timber materials from off-site

The corridor along the trail was heavily harvested for Alaska yellow cedar historically, so there is no suitable cedar material within ¼ mile of the trail. Provide all cedar timber materials, including bridge stringers, sills, puncheon, and sign posts from off-site sources. Retainer logs may be any species and may be harvested along the trail corridor. Peel bark prior to installation.

Off-site sources may be from commercial sources or harvested from approved locations on National Forest Lands in the vicinity of the project. If the contractor proposes to harvest materials from National Forest Lands, flag the trees proposed for harvest and provide a map showing their location to the COR. Do not harvest any materials until approval is granted in writing.

938.03 Split Puncheon

The intent of split-face puncheon is to replicate the look and feel of hand-split puncheon trail that was constructed during the 1930’s by the Civilian Conservation Corp trail crews.

Puncheon decking planks to be Alaska Yellow Cedar of a grade suitable for making straight split planks.

Knots are acceptable but must be less than 1-1/2” in size or as approved. Wood must be free of rot.

Planks may be hand or mechanically split from round logs to the thickness dimension specified or may be sawn to a thicker dimension then split to the dimension specified. If sawn then split, install with the sawn face down and the split face up. Split off the sapwood from the sides of the planks.

Puncheon stringers to Alaska Yellow Cedar, free of rot and major cracks. Stringers are to be peeled round logs, milled flat on the top to provide a 2” minimum flat face for bearing the puncheon decking.

938.04 Bridge Stringers, Sills and Signposts

Provide Alaska Yellow Cedar material that is sound, without rot, and relatively straight. Peel bark prior to installation.

938.05 Finish

Appearance of finished timber and puncheon structures to be free of chain saw marks or other marks that would indicate work by a power tool. Remove any power tool marks with an adze, draw knife, etc. so work simulates hand work.

938.06 Method

Measure in accordance with Section 906.

SECTION 941 — AGGREGATE SURFACING

941.01 Work

The work consists of constructing Aggregate Surfacing (AS) and Aggregate Surfacing with Retainer Log

(AS-RL)

Materials

941.02 Handling Materials

No aggregate stockpiles are permitted within the project area.

Stockpile, remove, transport, and spread aggregates in a manner that will preserve specified gradation and avoid contamination.

941.03 Aggregate Surfacing (AS) and Bedding Material

For all aggregate applications, provide 1-1/2” minus crushed rock, meeting the following Alaska DOT specification Base Course C-1:

Sieve Size

Passing

1.5” 100 1” 70-100 ¾” 60-90

3/8” 45-75 No. 4 30-60 No. 8 22-52

No. 50 6-30 No. 200 0-6

Provide a sieve analysis conforming to AASHTO T-11 and T-27, performed by a qualified testing lab showing results taken from stockpile sample, or certification from the aggregate producer showing a sieve analysis for the same material completed within the past year.

941.04 Seed-Free Aggregate.

Provide aggregate materials that are free of viable seeds or vegetative material. Ensure that contamination does not occur from equipment and tools used to handle aggregate or construct trail. Thoroughly wash all equipment and tools that come into contact with aggregate or are used at the work site, to remove all soil, debris, and other material that could contain seed or vegetative material. Use only aggregate from an active stockpile that is certified weed free. Provide notification one week before moving material from the source facility to allow inspection.

941.05 Handling of Aggregate.

Place aggregate directly on the trail or contain aggregate in bags until it is installed on the trail. Do not place aggregate directly on the ground outside of the trailway unless bagged.

941.06 Compaction and Finished Grading.

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

941.11 Acceptance, Testing, Sampling, and Tolerances

Provide the minimum compacted thickness of aggregate surfacing shown on 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.

Do not vary the aggregate width by more than ± 2 inch from the specified width or place it consistently narrower or wider than the specified width, except as SHOWN ON THE DRAWINGS.

941.12 Method

Measure in accordance with Section 906.

SECTION 951 – SIGNS

951.01 This work consists of furnishing and installing signs including excavation, backfill, and associated materials and hardware. See Section 938 for signpost materials. It also includes the installation of the Government-furnished beach trail marker sign at Ship Cove.

Material

951.02 Standards

All materials shall conform to Forest Service EM-7100-15, Sign and Poster Guidelines for the Forest Service or as SHOWN ON THE DRAWINGS.

951.03 Fabrication

Signs to be provided by: Wood Products Signs (www.woodpoductssigns.com) or approved equivalent.

951.04 Shop Drawings

Provide shop drawings for each sign for approval prior to fabrication.

951.05 Sign Material

Sign material to be Western Red Cedar.

951.06 Finish

Sign and lettering to be unpainted western red cedar. Apply 2 coats linseed oil or other natural oil finish suitable for outdoor exposure to sign after lettering.

951.06 Sign Layout

Use layout for standard US Forest Service trail sign TD-1. Use 1-inch letters, Forest Service standard font with 1” routed letters. No paint.

Provide sign text as follows. See also Trail Log.

Sign #1:

SHIP COVE TRAIL

CONSTRUCTED BY CCC – 1935

RESTORED BY USFS – 2024

Sign #2:

PORT ALEXANDER

BACK BAY

Sign #3:

SHIP COVE

951.06 Measure in accordance with Section 906. The installation of the Government-furnished beach trail marker sign at Ship Cove is incidental to other work in this Section and no additional payment will be made.