Attachment 1 - Project Specifications.pdf

EYAK RIVER RECREATION AREA

REHABILITIATION

AK FS CNF 8000(1)

CONTRACT SPECIFICATIONS

Contract No. ________________

Chugach National Forest U.S. Forest Service

161 East 1st Ave.

Anchorage, AK 99501

February 1, 2023

TABLE OF CONTENTS

Eyak River Recreation Area Rehabilitation AK FS CNF 8000(1) i

Eyak River Boat Launch Regrading Contract Specifications

Section Specification Title Page

00 00 00 PROCUREMENT AND CONTRACTING REQUIREMENTS

01 00 00 GENERAL REQUIREMENTS

PART 1 – GENERAL

1.1 SUMMARY OF WORK................................................................................01 00 00-1

1.2 EXISTING CONDITIONS ............................................................................01 00 00-1

1.3 GENERAL COMMENTS .............................................................................01 00 00-2

1.4 FIELD SURVEYING ....................................................................................01 00 00-2

1.5 MEETINGS ...................................................................................................01 00 00-3

1.6 SUBMITTAL PROCEDURES ......................................................................01 00 00-4

1.7 CONSTRUCTION SCHEDULES.................................................................01 00 00-4

1.8 CONSTRUCTION WORK PLAN ................................................................01 00 00-4

1.9 PERMIT REQUIREMENTS .........................................................................01 00 00-4

1.10 PERFORMANCE SCHEDULE ....................................................................01 00 00-5 01 00 00-5

1.11 MANUFACTURER’S INSTRUCTIONS AND CERTIFICATES...............01 00 00-5

1.12 QUALITY CONTROL ..................................................................................01 00 00-6

1.13 TEMPORARY CONSTRUCTION CONTROLS – ISOLATION &

DEWATERING .............................................................................................01 00 00-6

1.14 SITE ACCESS AND FENCING ...................................................................01 00 00-6

1.15 SITE STORAGE ............................................................................................01 00 00-7

1.16 POLLUTION AND ENVIRONMENTAL CONTROL ................................01 00 00-7

1.17 DELIVERY, HANDLING, STORAGE AND PROTECTION ....................01 00 00-7

1.18 PRODUCT OPTIONS ...................................................................................01 00 00-7

1.19 FINAL INSPECTION ...................................................................................01 00 00-8

1.20 MEASUREMENT AND PAYMENT ...........................................................01 00 00-8

AK FS CNF 8000(1) ii

31 00 00 EARTHWORK

PART 1 – GENERAL

1.1 SECTION INCLUDES ..................................................................................31 00 00-1

1.2 RELATED SECTIONS .................................................................................31 00 00-1

1.3 MEASUREMENT AND PAYMENT ...........................................................31 00 00-1

1.4 SUBMITTALS ..............................................................................................31 00 00-1

1.5 REFERENCES ..............................................................................................31 00 00-1

PART 2 – PRODUCTS

2.1 MATERIALS .................................................................................................31 00 00-2

2.2 SOURCE QUALITY CONTROL .................................................................31 00 00-4

PART 3 – EXECUTION

3.1 EXAMINATION ...........................................................................................31 00 00-4

3.2 PREPARATION ............................................................................................31 00 00-4

3.3 CONSTRUCTION .........................................................................................31 00 00-4

3.4 TOLERANCE ................................................................................................31 00 00-6

3.5 QUALITY CONTROL ..................................................................................31 00 00-6

3.6 PROTECTION ...............................................................................................31 00 00-7

3.7 CLEANING ...................................................................................................31 00 00-7

31 05 19 GEOTEXTILES FOR EARTHWORK

1.1 SECTION INCLUDES ..................................................................................31 05 19-1

1.2 RELATED SECTIONS .................................................................................31 05 19-1

1.3 NOT USED ....................................................................................................31 05 19-1

1.4 SUBMITTALS ..............................................................................................31 05 19-1

1.5 REFERENCES ..............................................................................................31 05 19-1

1.6 DEFINITIONS ...............................................................................................31 05 19-2

1.7 QUALITY ASSURANCE .............................................................................31 05 19-2

1.8 DELIVERY, STORAGE, AND HANDLING ..............................................31 05 19-2

2.1 MANUFACTURER ......................................................................................31 05 19-2

2.2 MATERIALS .................................................................................................31 05 19-2

PART 3 – EXECUTION

3.1 EXAMINATION AND PREPARATION .....................................................31 05 19-3

3.2 INSTALLATION ..........................................................................................31 05 19-3

1.1 SUMMARY OF WORK

See Scope of Work in Section C.1

1.2 EXISTING CONDITIONS

A. The Eyak River Recreation Area is located at approximately milepost 5.9 of the

Copper River Highway east of Cordova, Alaska. Cordova may be accessed by daily Alaska Airlines jet service from Anchorage and Juneau. Marine access is also available by Alaska Marine Highway ferry service from Valdez and Whittier as well as barge service to the local port.

B. A site survey, geotechnical investigation, and hydrologic and hydraulic analyses have been conducted in support of the design of the replacement ramp. Any of this information will be made available upon request. Contact the Contracting Officer to request any of this information.

C. The project area receives abundant precipitation (120” per year). June is usually the driest month and September is usually the wettest, but powerful rainstorms can occur in any season. The stream channel is typically 200 feet wide and averages approximately 4-5 feet deep near the project site. The stream gradient at the site is low and the stream channel is straight and free of obstructions, so flows are straight and the velocity is relatively slow. The stream bottom is comprised of silt and sand mixed with gravel. Thick beds of aquatic vegetation grow near the site in the summer.

Water levels are generally lowest in the winter and early spring (December through mid-May), before high elevation snow and ice starts melting, but floods can strike at any time of year if a warm rainstorm makes landfall. Water levels rise over 2 feet over a short period of time multiple times per year. Water levels rise 4 feet over a short period of time once per year on average, mostly during August or September.

Water levels typically fall quickly once a storm passes. These predictions and measurements are provided for information only. The Contractor shall verify expected range of water elevations during the period of construction.

D. Contractor shall be responsible for verifying all site characteristics and conditions pertinent to placing a bid and executing the work. Verifications should include but are not limited to anticipated high- and low-water elevations.

1.3 GENERAL COMMENTS

A. All references to ‘Forest Service’, ‘Department, ‘engineer’ and ‘owner’ in the plans and specifications shall refer to the Contracting Officer (CO)

1.4 FIELD SURVEYING

A. Contractor shall provide all materials, labor, equipment, and incidentals necessary and required to conduct surveys with sufficient precision to establish elevations, lines, and levels, and to certify that elevations and locations of the Work conform with Contract Documents.

B. All site survey work shall be performed under the direction of an Alaska-licensed professional land surveyor who will be responsible for conducting field surveying and reporting associated with certain quality control surveying, measurement for payment surveys, and construction record surveying and documentation, as specified in this section.

C. Contractor shall locate reference datum and protect survey control and reference points. Contractor shall promptly report to Contracting Officer the loss, damage, or destruction of any reference point for any reason, including for relocation required because of changes in design grades. Contractor shall replace dislocated survey control points based on original survey control at no additional cost to the Government. Replacement of dislocated survey control points shall be done by a licensed land surveyor in the State of Alaska. Survey accuracy and precision used to relocate disturbed control points shall be equal to or better than that used to set the original control.

D. Contractor shall be responsible for the accuracy of all surveys performed under this Contract, including those of its subcontractors. Any work performed not conforming to the lines, grades, elevations and locations indicated on the Drawings due to survey error shall be the responsibility of Contractor, and Contractor shall repair or relocate such work to its proper location at no additional cost to the Government.

1.5 MEETINGS

A. A preconstruction meeting will be held by the Contracting Officer’s

Representative(s), and the Contractor. The Notice to Proceed will be issued after that meeting.

1. The purpose of the preconstruction meeting is to designate responsible personnel, verify understanding of the Drawings and Specifications, and establish working relationships.

2. Matters requiring coordination will be discussed and procedures for handling such matters established. At a minimum, the agenda will include the following:

a. Contractor’s schedule

b. Work plan

c. On-site coordination

d. Transmittal, review, and distribution of Contractor’s submittals as indicated in

1.4 of each section.

e. Health and safety planning and concerns

f. Permits: as required

g. Submittal and processing of Contractor’s periodic progress payments

h. Traffic and site access control (both land-side and water-side)

i. Progress meetings

j. Quality Control Plan

k. Dewatering controls

l. Pollution & Environmental Control, SWPPP submittal.

B. Weekly progress meetings may be held during construction by the Contracting Officer’s Representative(s) and the Contractor to review progress of work, maintain coordination efforts, discuss changes in scheduling, and resolve problems which may develop.

C. A special meeting may be held when and if a problem or deficiency develops, or is likely to occur. At a minimum, the meeting will be attended by the Contractor and the Contracting Officer.

1.6 SUBMITTALS

A. Submittal documents shall identify Project, Contractor, subcontractor or supplier, and pertinent Contract Document references.

B. Contractor shall certify that review, verification of Products required, field dimensions, adjacent construction Work, and coordination of information are in accordance with requirements of the Work and Contract Documents.

C. Identify product or system limitations which may be detrimental to successful performance of completed Work.

D. Contracting Officer will review the submittals, mark the document with appropriate notations, or comments and return the marked document to the Contractor for revision or filing in the Project record. Revise and resubmit submittals as required;

identify changes made since previous submittal.

E. Contractor shall prepare and submit a Construction Work Plan, per the CONSTRUCTION WORK PLAN paragraph below, summarizing the proposed methods, equipment, and sequencing of key elements of the Work. At a minimum, the Contractor’s Construction Work Plan shall include the informational requirements listed under SUBMITTALS for each section of the Specifications, as applicable.

F. Contractor shall prepare and submit a detailed Dewatering Plan as part of the Contractor’s project proposal. The project proposal will be evaluated with emphasis on the detailed Dewatering Plan. See Section 1.17 below for more detail.

1.7 CONSTRUCTION SCHEDULES

A. Submit schedules weekly and with each Application for Payment, identifying changes since previous version. Indicate estimated percentage of completion for each item of Work at each submission. If no changes are made to the schedule, indicate such information on the weekly schedule submittal.

B. Submit a Gantt chart with separate lines for each section of Work, identifying the first work day of each week. Chart shall be submitted in Adobe PDF format, formatted to print on 11” x 17” paper.

1.8 CONSTRUCTION WORK PLAN

A. Within 10 calendar days after date of Notice to Proceed, Contractor shall submit a detailed Construction Work Plan describing the equipment, methods, materials and sequencing that will be used to complete all elements of the Work, including excavation, fill placement, and compaction. The work plan shall also address quality control and the use of temporary controls. Specific work elements to be included

Construction Work Plan are identified in the subsequent sections of these specifications.

1.9 PERMIT REQUIREMENTS

A. Permits have been secured from the US Army Corp of Engineers and the State of

Alaska Department of Fish & Game. All construction operations are expected to fully comply with these attached permits.

B. Permit language from ADF&G stipulates a requirement to isolate the in-stream construction area from the river to eliminate sedimentation potential. Refer to Section 1.16 for Temporary Dewatering Control requirements. Dewatering structure removal must be coordinated with existing ramp demolition to avoid multiple sediment delivery events.

C. All in-stream construction must be completed between October 1 and May 30 to avoid salmon spawning windows.

D. Per the ADF&G permit, any stranded fish must be returned to the free flowing river immediately upon isolation. The USFS will coordinate the trapping and relocation of stranded fish at no cost to the contractor as long as 48 hours notice is provided.

E. During all dewatering activities, water must be pumped to a sedimentation basin or other upland site.

F. No vegetation clearing activities will be allowed between May 1 and July 1 to avoid disturbance to nesting migratory birds and waterfowl.

G. Due to restrictions of the Environmental Analysis, no work shall occur during the Coho salmon fishing season from August 1 through September 30.

1.10 PERFORMANCE SCHEDULE

A. Work will not commence before issuance of the Notice to Proceed. The Notice to

Proceed is anticipated to be issued by the Contracting Officer shortly after contract award and after the Pre-construction Conference. It is anticipated that Contract award will occur on or before August 1, 2023. All work shall follow the permit restrictions listed in Section 1.9, Permit Requirements. The required completion date for this project is June 30, 2024.

1.11 MANUFACTURER’S INSTRUCTIONS AND CERTIFICATES

A. When specified in individual specification sections, submit manufacturer printed instructions for delivery, storage, assembly, installation, adjusting, and finishing.

B. Indicate material or product conforms to or exceeds specified requirements and indicate specification sections of related requirements. Submit supporting reference data, and certifications as appropriate.

1.12 QUALITY CONTROL

A. Contractor shall submit, as part of the Construction Work Plan, a Quality Control

Plan to ensure that quality control is actively and appropriately being performed throughout the duration of the project. This QC Plan shall include monitoring quality control over suppliers, manufacturers, products, services, site conditions, and workmanship, to produce Work of specified quality.

B. Comply with manufacturer’s instructions.

C. Contractor must comply with project specifications and meet all applicable standards as minimum quality for the Work.

1.13 TEMPORARY CONSTRUCTION CONTROLS – ISOLATION & DEWATERING

A. Dewatering will be necessary to construct the lower portion of the ramp. Dewatering is the sole responsibility of the contractor. The Contractor shall submit a detailed Dewatering Plan with the Contractor’s project proposal. The Contractor’s project proposal will be evaluated with emphasis on the Contractor’s detailed Dewatering Plan.

B. Contractor shall retain the services of an appropriately qualified professional engineer with dewatering experience to design such controls, and shall assume full responsibility for its performance and safety.

C. Any and all costs for design (including site characterization and engineering), installation, operation and maintenance, and decommissioning of temporary dewatering controls shall be included in Contractor’s bid price for the Work, in accordance with the MEASUREMENT AND PAYMENT paragraph of this section.

1.14 SITE ACCESS AND FENCING

A. The Contractor is required to maintain public access to the site during all phases of construction. The Contractor is responsible for maintaining site security. On a case-by-case basis, upon written request by the Contractor, the Contracting Officer may approve total closure of the site for specific construction activities that would result in a safety risk to the public. The Contractor shall not close the site to public access unless express written consent is provided by the Contracting Officer or Contracting Officer’s Representative. During an approved closure, the Contractor shall maintain applicable closure signage and complete the specific construction activity as quickly as possible to expedite re-opening of the site.

B. It is the Contractor’s responsibility to provide site closure devices (e.g. signs, fencing) and pedestrian diversion fencing for safety of the public and it’s workers. The contractor is responsible for site security around the construction work area and lay-down or “bone yard” site. Any locking mechanisms used during a temporary closure at the site entrance must be coordinated with the Contracting Officer to ensure emergency access by the USFS is maintained. Coordinate with Contracting Officer for acceptance of layout prior to installation.

1.15 SITE STORAGE

A. Contractor shall provide its own field office and storage, as needed to facilitate the

Work. Contractor shall coordinate space for lay-down or “bone yard” area with the Contracting Officer prior to commencement of the Work. Utilities (e.g., water, sewer, electricity, etc.) are unavailable at the site. The Contractor shall make its own arrangements, as needed, to support any temporary facilities.

1.16 POLLUTION AND ENVIRONMENTAL CONTROL

A. Contractor shall include as part of its Construction Work Plan a description of the proposed means, methods, and facilities to prevent contamination of soil, water, and atmosphere from discharge of noxious and/or toxic substances and pollutants produced by construction operations.

D. Contractor shall comply with all applicable environmental, erosion, and water quality control regulations and permit requirements.

E. Construction equipment must be cleaned (visibly free of soil, seeds, and other debris) before being transported to project area in order to reduce the potential spread of invasive plant species.

1.17 DELIVERY, HANDLING, STORAGE AND PROTECTION

A. Deliver, handle, store, and protect Products in accordance with manufacturer’s instructions.

B. The Contracting Officer will not accept any damaged or otherwise compromised products, regardless of the cause of such damage.

C. The Contractor shall handle Government owned property, including concrete planks and cables, with care to prevent damage. Any damage that occurs to Government-owned property shall be repaired or replaced in to a condition that meets or exceeds the original condition.

1.18 PRODUCT OPTIONS

A. Products Specified by Reference Standards or by Description Only: Any Product meeting those standards or description.

B. Products Specified by naming one or more manufacturers with provision for substitutions: Submit request for substitution for manufacturers not named.

1.19 FINAL INSPECTION

A. Final Inspection: Final Inspection shall be defined as that period at which all work in the Contract is 100% complete and no minor details remain to be performed.

1. The Contractor shall notify the Contracting Officer in writing, at least 10 days prior to the date requested on which the work will be ready for final inspection.

B. Final pay request will be processed for payment upon final inspection and Contracting Officer’s certification that work under the contract is 100% complete.

C. Execute final cleaning prior to final inspection. Remove waste and surplus materials, rubbish, and construction equipment and facilities from site.

1.20 MEASUREMENT AND PAYMENT

A. Measurement for payment will be at the lump sum or unit price stipulated in the

Schedule of Items. Payment shall be considered full compensation for furnishing all labor, materials and equipment to complete the Work in accordance with the requirements and intent of the Contract Documents, including the Contract Specifications, and Drawings.

B. Only the pay items listed in the Schedule of Items shall be considered for measurement and payment.

C. Pay Items

Items will be measured and paid per the Schedule of Pay Items and Measurement and Payment Terms below. The following definitions shall apply:

“Each” or “EA” – These quantities denote one complete unit, which may consist of one or more parts.

“Lump Sum Quantities” or “LS” or “LSQ” - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor needed to complete the job. They will not be measured.

“Linear Foot” or “LF” – Measurement is on a plane parallel to the surface being measured.

“Square Foot,” “SF,” “Square Yard,” or “SY” - Measurement is on a plane parallel to the surface being measured, in either square feet or square yards.

“Cubic Yard” or “CY” - Measurement is computed by the average-end area method from measurements made longitudinally along a centerline or other reference line.

All CY quantities are measured in-place and compacted.

“Contract Quantities” or “CQ” - These quantities denote the final number or 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, drawings, and the presentation in the contract. Changes in the number of units SHOWN in the SCHEDULE OF ITEMS may be authorized under any of the following conditions:

(1) As a result of changes in the work authorized by the Contracting Officer.

(2) As a result of the Contracting Officer 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 Contracting Officer 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.

“Actual Quantities” or “AQ” - These quantities are determined from measurement of completed work. Payment is governed by FAR 52.211-18.

END OF SECTION

SECTION 31 00 00 – EARTHWORK

AK FS CNF 8000(1) 31 00 00-1

PART 1 – GENERAL

1.1 SECTION INCLUDES

A. This section includes:

1. Site clearing (grubbing and stripping) and excavation of unsuitable materials (including removal, hauling, and disposal of waste materials)

a. Unsuitable material is that which is not capable of creating stable foundations, embankments, or roadbeds. This includes muck, sod, or soils with high organic contents.

2. Placement and compaction of ramp base course materials

3. Placement and compaction of parking area and pedestrian walkway surface course aggregates.

4. Placement of riprap slope protection

5. Placement of cobble surfacing for streambank stabilization.

6. Accessible loading platform foundation subgrade preparation

1.2 RELATED SECTIONS

A. Section 01 00 00 – General Requirements

B. Section 31 05 19 – Geotextiles for Earthwork

1.3 MEASUREMENT AND PAYMENT

A. Refer to the MEASUREMENT AND PAYMENT paragraph in Section 01 00 00, Part 1.

1.4 SUBMITTALS

A. Section 01 00 00 – General Requirements: Requirements for submittals.

B. Supplier’s Certificate: Provide supplier certification that each imported fill material meets or exceeds requirements specified herein.

C. Materials and Source: For each imported material type, submit test results and include name and contact information of material supplier and source location.

D. Contractor’s Construction Work Plan. Contractor shall describe in its Construction Work Plan any temporary construction controls, equipment, construction methods, and sequencing (relative to other Work elements) that will be used for completion of the Work specified in this section of the Contract Specifications and associated Drawings.

E. Project Record Drawings: Accurately record location and details of finished grades in accordance with Section 01 00 00 General Requirements. Drawings shall capture as-built extent, limits, and grade of all placed fill materials.

1.5 REFERENCES

A. AASHTO Standards

1. AASHTO T27 - Test Method for Sieve Analysis of Fine and Coarse Aggregates

2. AASHTO T11 – Materials Finer than No. 200 (75µm) Sieve in Mineral Aggregates by Washing

AK FS CNF 8000(1) 31 00 00-2

3. AASHTO T96 – L.A. Wear

4. AASHTO T104 - Standard Method of Test for Soundness of Aggregate by Use of Sodium Sulfate or Magnesium Sulfate

5. AASHTO T 180 - Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop

B. Alaska Department of Transportation and Public Facilities (ADOT&PF)

1. 2017 Standard Specifications for Highway Construction

2. Alaska Test Methods Manual (ATM)

a. ATM 313 Degradation Value of Aggregate

C. ASTM International

1. ASTM D1557- Test Methods for Moisture-Density Relations of Soils and Soil- Aggregate Mixtures Using 10-pound Rammer and 18-inch Drop

D. Western Alliance for Quality in Transportation Construction (WAQTC) Field Operating Procedures (FOP)

1. FOP for T 89 Determining the Liquid Limit of Soils

2. FOP for T 90 Determining the Plastic Limit and Plasticity Index of Soils

3. FOP for T 217 Determination of Moisture in Soils by Means of a Calcium Carbide Gas Pressure Moisture Tester.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Base Course material shall consist of Aggregate containing no muck, frozen material, roots, sod or other deleterious matter and with a plasticity index not greater than 6 as tested by ATM 204 and ATM 205. Meet the following gradation as tested by ATM 304: Table 3: Base Course Grading Requirement (Percent Passing by Weight)

Sieve Percent Passing by Weight 6 Inch 100 No. 4 20-60 No. 200 0-6

B. Riprap shall consist of evenly graded stones that are hard, angular and have no more than 50% wear at 500 revolutions as determined by AASHTO T 96. Use stones with breadth and thickness of at least 1/4 of their length. Meet the gradation in Table 4 below based on weight of each stone.

AK FS CNF 8000(1) 31 00 00-3

Table 4: Riprap Gradation Percent of

Total by Mass Mass (lb)

Approximate Cubic Dimensions (in)

0-50 up to 25 up to 6 40-100 26-49 6 to 8 0-10 50 or greater 8 or larger

B. Type E-1 Crushed Aggregate shall be used for the new driveway, parking surfaces and surfacing of pedestrian pathways. Type D-1 Crushed Aggregate shall be used for base course for asphalt apron, backfill for the retaining wall, compacted base for all cast-in-place concrete, and compacted base for the boat ramp. Both E-1 and D-1 meet the definition of the 2017 ADOT&PF Standard Specifications for Highway Construction:

Crushed stone or crushed gravel, consisting of sound, tough, durable pebbles or rock fragments of uniform quality. Free from clay balls, vegetable matter, or other deleterious matter. Meet the physical and gradation requirements listed below in Tables 5 and 6.

Table 5: Crushed Aggregate Physical Requirements

Table 6: Crushed Aggregate Gradation Requirement (Percent Passing by Weight)

Sieve Gradation (% Passing by weight) D-1 E-1

1 in. 100 100 3/4 in. 70-100 70-100 3/8 in. 50-80 50-85 No. 4 35-65 35-65 No. 8 20-50 20-50 No. 50 6-30 15-30 No. 200 0-6 8-15

D. Cobble Surfacing shall consist of clean, washed rounded stones meeting the gradation in Table 7 below and be of matching or similar color as the existing, natural substrate as approved by the C.O.

Property Requirement Method L.A. Wear,% 45, max. AASHTO T 96 Degradation Value 45, min. ATM 313 Fracture,% 70, min. WAQTC FOP Liquid Limit 35, max. WAQTC FOP

Plastic Index 10, max. WAQTC FOP Sodium Sulfate Loss,%

9, max. (5 cycles) AASHTO T 104

AK FS CNF 8000(1) 31 00 00-4

Table 7: Cobble Surfacing Gradation Requirement (Percent Retained by Size (in) Size Percent Retained by Size 3-4 inch dia. 60 2-3 inch dia. 40

E. Joint Aggregate shall consist of clean, washed stones meeting the gradation in Table

8 below.

Table 7: Joint Aggregate Gradation Requirement (Percent Retained by Size (in) Sieve % Passing by weight 3/4 inch dia. 100 No. 4 0 - 10 No. 200 0 - 2

2.2 SOURCE QUALITY CONTROL

A. Perform analyses per methods specified above, in accordance with 2017 ADOT&PF

Standard Specifications. If tests indicate materials do not meet specified requirements, change material and retest.

PART 3 – EXECUTION

3.1 EXAMINATION

A. Site Verification

1. Verify survey benchmarks, horizontal control and intended elevations for the Work are as indicated.

2. Verify vegetation to remain is protected and prominently marked.

3. Install erosion control and verify all erosion controls are in place and operating correctly.

3.2 PREPARATION

A. Protection:

1. Protect vegetation to remain.

2. Protect and/or relocate benchmarks, horizontal control, vertical control, and existing structures.

B. Preparation:

1. Survey and stake limits of clearing. Slope stake toe of fills and top of cuts.

2. Identify required lines, levels, contours, and datum.

3. Identify on-site trees and/or shrubs to be removed within limits of clearing.

4. Identify existing improvements to be removed to facilitate construction and replaced for Contracting Officer. Materials may include, but are not limited to, bollards, fire pits, benches and or picnic tables, informational signs, etc.

AK FS CNF 8000(1) 31 00 00-5

5. Contractor shall implement sediment and erosion control, isolation, dewatering, and other temporary construction measures in accordance with Government Approved Contractor Construction Work Plan.. See Section 01 00 00

GENERAL REQUIREMENTS.

3.3 CONSTRUCTION

A. Site Clearing and Excavation:

1. Merchantable Timber – any tree with top diameter greater than 6” is considered merchantable timber and is the property of the Government. Merchantable timber shall be limbed and decked onsite in an area designated by the COR.

Limbs and trees or tree-tops less than 6” shall be considered slash and shall be disposed of at an approved offsite location.

2. Strip remaining topsoil, plants, and organics in areas indicated on the Drawings.

Excavate surficial soils to the lines and grades indicated on the Drawings.

Topsoil removed from newly cleared areas shall be utilized to cover the area exposed after removal of the existing driveway. At the direction of the COR, , some clearing slash may be utilized to cover the topsoiled area after the existing driveway is removed. Dispose of excess vegetation and unsuitable material at an approved offsite location.

3. Do not clear and expose more underlying material than can be covered and protected from erosion with geotextile and granular cover materials during a single daily shift. Place geotextile in accordance with Section 31 05 19 – Geotextiles for Earthwork.

4. Drainage from saturated excavation spoils shall be contained and managed to prevent any drainage to the river. Appropriate measures shall be taken to prevent the release of sediment pore water from excavation spoils during off-site hauling and disposal.

B. Subgrade Preparation:

1. Following site clearing and excavation and prior to placing backfill, cover all exposed subgrade with geotextile, in accordance with the provisions of Section 31 05 19 – Geotextiles for Earthwork. Shape, grade and compact subgrade for the proposed ramp alignment to the lines and grades indicated on the Drawings.

C. Base Course:

1. Using maximum 12-inch lifts, place Base Course material under aggregate layers of parking area expansion and boat ramp with a minimum thickness of 12 inches. Excavate where required to accommodate minimum layer thickness.

Base Course placed under the boat ramp shall be wrapped with geotextile material as indicated on the Drawings. Geotextile material and placement shall comply with provisions of Section 31 05 19 – Geotextiles for Earthwork. The surface of the Base Course shall be graded and shaped to a smooth, uniform surface prior to completing geotextile wrap and placement of E-1 surface course.

2. Compact each layer of base course material with a vibratory compactor having a gross static weight of at least 8 tons, or as directed by the CO. Compact until the material no longer yields under the compactor. If the base course begins to

AK FS CNF 8000(1) 31 00 00-6

unravel due to subgrade yield, static roll only to achieve the greatest density possible. Adequacy of placement will be based on visual observations by the

COR.

D. Riprap:

1. Riprap shall be placed from toe to top of slope with an excavator bucket equipped with a hydraulic “thumb”. End-dumping riprap material from haul trucks shall not be permitted. Rock shall be carefully placed and tamped with excavator bucket to ensure a secure interlock between individual stones, as well as to minimize potential damage to geotextile.

2. Riprap shall be placed in conjunction with the base course, so as to buttress, support, and protect the overall integrity of the embankment.

3. Place riprap per 2017 ADOT Standard Specifications Section 611-Riprap.

E. Parking Area Expansion Surface Preparation:

1. Place, compact and shape surface aggregate to the lines and grades indicated on the Drawings.

3. Surface course material shall be compacted to 95% maximum density as determined by Modified Proctor (AASHTO T180).

F. Accessible Loading Platform Subgrade Preparation:

1. Place, compact and shape aggregate to the lines and grades indicated on the Drawings.

2. Place and compact aggregate in layers not exceeding 6 inches loose depth.

3. Aggregate material shall be compacted to 95% maximum density as determined by Modified Proctor (AASHTO T180).

G. Cobble Surfacing:

1. Cobble shall be carefully placed and tamped with an excavator bucket to ensure consolidation of the material. The finished surface of the cobble surfacing shall be uniform without major irregularities. Where cobble surfacing contacts the existing grade break at the edge of the vegetated riverbank, the top surface shall be at or slightly above the existing vegetated surface

3.4 TOLERANCE

Aggregate surfaces will be tested using a 10-foot straightedge at selected locations.

Limit surface deviations to 0.3’ for sub-grade and 0.1’ for surface course, as measured from the testing edge of the straightedge between two contacts with the surface.

3.5 QUALITY CONTROL

A. Contractor shall carefully control placement and compaction of ramp embankment fill materials. Visually inspect the performance of the fill materials during placement and under equipment loading conditions. Notify the Contracting Officer upon discovery of unsuitable material to arrange for disposal.

AK FS CNF 8000(1) 31 00 00-7

Ramp embankment fill shall be stable and competent prior to placing pre-cast concrete boat ramp planks. Aggregate fill density is to be confirmed by CO prior to placing boat ramp planks.

B. Contractor shall inspect, survey, and document compliance with the Contract Documents following:

1. Subgrade excavation

2. Placement of geotextile stabilization layer.

3. Placement of each of the fill materials in this section.

C. Contractor shall obtain Contracting Officer’s acceptance of the interim Work at each of the above milestones, prior to placing subsequent materials.

3.6 PROTECTION

A. Protect exposed surfaces and subgrade from damage due to excess moisture and traffic.

B. Take necessary precaution to protect exposed soils and stockpiled materials from excess moisture and erosion.

3.7 CLEANING

A. Dispose of surplus, waste, or unsuitable materials at an approved off-site location, according to governing laws, regulations and ordinances.

SECTION 31 05 19 – GEOTEXTILES FOR EARTHWORK

1.1 SECTION INCLUDES

A. Geotextile to stabilize and reinforce fill and base materials.

1.2 RELATED SECTIONS

A. Section 31 00 00 Earthwork

1.3 NOT USED

1.4 SUBMITTALS

A. Technical Data: Provide technical data published by the manufacturer of each geotextile proposed, including:

1. The name of each geotextile manufacturer.

2. The manufacturer’s product name.

3. The MARV physical properties described in this Section.

4. Storage, handling and installation instructions.

5. Seam instructions and thread, if used, including descriptive drawings or photographs of methods required.

6. Other project-specific technical literature describing geotextiles proposed for this Work.

B. Contractor’s Construction Work Plan. Contractor shall describe in its Construction Work Plan the temporary construction controls, equipment, construction methods, and sequencing (relative to other Work elements) that will be used for completion of the Work specified in this section of the Contract Specifications and associated Drawings.

C. Project Record Drawings: The extent and limits of geotextile placement shall be accurately documented and detailed on the Project Record Drawings, in accordance with Section 01 00 00 General Requirements.

1.5 REFERENCES

A. American Society for Testing and Materials (ASTM):

1. D 3786 - Standard Test Method for Hydraulic Bursting Strength of Knitted Goods and Nonwoven Fabrics

2. D 4355 - Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus)

3. D 4491 - Test Methods for Water Permeability of Geotextiles by Permittivity

4. D 4533 - Test Method for Index Trapezoid Tearing Strength of Geotextiles

5. D 4595 - Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method

6. D 4632 - Test Method for Grab Breaking Load and Elongation of Geotextiles

7. D 4751 - Test Method for Determining Apparent Opening Size of a Geotextile

8. D 4833 - Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products

9. D 4873 - Guide for Identification, Storage, and Handling of Geotextiles

1.6 DEFINITIONS

A. Minimum Average Roll Value (MARV): Property value calculated as typical minus two standard deviations. Statistically, it yields a 97.7 percent degree of confidence that any sample taken during quality assurance testing will exceed the value reported.

1.7 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. Geosynthetic Accreditation Institute (GAI)- Laboratory Accreditation Program

(LAP)

2. American Association for Laboratory Accreditation (A2LA)

B. Contractor Qualifications and Requirements:

1. Provide personnel trained and qualified for the work in this section and experience with installation of specified materials.

2. Strictly adhere to geotextile manufacturer’s written instructions and recommendations approved by the Contracting Officer, for required handling, storage, transportation, installation, overlapping, sewing, and repair of geotextiles.

1.8 DELIVERY, STORAGE, AND HANDLING

A. Geotextiles labeling, shipment and storage shall follow ASTM D4873. Product labels shall clearly show the manufacturer or supplier name, style name, and roll number.

B. Each geotextile roll shall be wrapped with a material that will protect the geotextile from damage due to shipment, water, sunlight, and contaminants.

C. During storage, geotextile rolls shall be elevated off the ground and adequately covered to protect them from the following: site construction damage, precipitation, extended ultraviolet radiation including sunlight, chemicals that are strong acids or strong bases, flames including welding sparks, excess temperatures, and any other environmental conditions that may damage the physical property values of the geotextile.

2.1 MANUFACTURER

A. Mirafi Construction Products, or approved equal.

2.2 MATERIALS

A. Woven geotextile for subgrade stabilization:

1. Approved geotextile: Mirafi HP570, or an approved equal which meets or exceeds specifications listed below.

2. The geotextile shall be woven from high-tenacity long-chain synthetic polymers composed of at least 95 percent by weight of polyolefins or polyesters. They shall form a stable network such that the filaments or yarns retain their dimensional stability relative to each other, including selvages.

3. The geotextile shall meet the requirements of Table 1. All numeric values in Table 1 except AOS represent MARV in the specified direction. Values for AOS represent maximum average roll values.

Table 1: Subgrade Stabilization Geotextile Physical Requirements Property Test Method Units Required Value Reinforcement Properties MD1 XD1 Ultimate Tensile Strength ASTM D 4595 kN/m (lbs/ft) 70.0 (4800) 70.0 (4800) Tensile Strength @ 2% Strain ASTM D 4595 kN/m (lbs/ft) 14.0 (960) 19.3 (1320) Tensile Strength @ 5% Strain ASTM D 4595 kN/m (lbs/ft) 35.0 (2400) 35.0 (2400) Coefficient of Interaction -Ci (sand)

ASTM D 5321 -- 0.8

Permittivity ASTM D 4491 sec-1 0.40 Apparent Opening Size ASTM D 4751 mm (U.S.

Sieve)

0.6 (30)

Sewn Seam Strength ASTM D 4884 kN/m (lbs/ft) 43.8 (3000) Survivability Index Values MD1 XD1 Grab Tensile Strength ASTM D 4632 N (lbs) 2120 (475) 1950 (440) Tear Strength ASTM D 4533 N (lbs) 800 (180) 800 (180) Puncture Strength ASTM D 4833 N (lbs) 870 (195) Burst Strength ASTM D 3786 kPa (psi) 8259 (1200) Ultraviolet Stability (after 500 hrs)

ASTM D 4355 % 70

1 MD: Machine Direction which is along roll length.

2 XD: Cross machine direction which is across roll width.

PART 3 - EXECUTION

3.1 EXAMINATION AND PREPARATION

A. Verify site subgrade has been prepared in accordance with the Drawings and Section 31 00 00 of these Specifications. Examine and verify site conditions are ready to receive work.

3.2 INSTALLATION

A. The geotextile shall be laid smooth without wrinkles or folds on the prepared subgrade, orientated with the long axis along the slope.

B. On curves, geotextile may be folded or cut to conform to the curve. The fold or overlap shall be in the direction of construction and held in place by pins, staples, or piles of fill or rock.

C. Installation within footprint of boat ramp alignment and embankment:

1. Following clearing and excavation, all exposed subgrade shall be graded, shaped, compacted and stabilized with geotextile, prior to placement of riprap or base course materials, as indicated on the Drawings. The width of overlap between adjacent rolls shall be 3 feet for placement within the boat ramp alignment and embankment footprint.

D. Encapsulation of base course material:

1. The base course material under the boat ramp shall be encapsulated by geotextile, as indicated on the Drawings. Ends of adjacent rolls shall overlap a minimum of 3 feet.

E. Installation within footprint of parking area expansion:

1. Following clearing and excavation, exposed subgrade shall be stabilized with geotextile, prior to placement of base course materials, as indicated on the Drawings. The width of overlap between adjacent rolls shall be 3 feet for placement within the parking area expansion footprint

F. Prior to covering with fill materials, geotextile shall be inspected and approved by the Contracting Officer to ensure product has not been damaged during installation.

Damaged product shall be repaired immediately, in accordance with manufacturer’s instructions and recommendations.

G. Fill materials shall be carefully placed on geotextile material. Sudden braking and sharp turning should be avoided. Tracked construction equipment should not be operated directly upon the geotextile. A minimum fill thickness of 6 inches is required prior to operation of tracked vehicles over the geotextile. Turning of tracked vehicles should be kept to a minimum to prevent tracks from displacing the fill and damaging the geotextile.

H. Geotextile fabric shall be anchored at the top of slopes, in accordance with the manufacturer’s recommendations.