Habitat Construction Drawings and Specifications

APPENDIX A

Habitat Construction Drawings and Specifications

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FINAL DESIGN

GOOSE EXCLUSION FENCE BEGINS AT EL+5.0

GOOSE EXCLUSION FENCE ENDS AT EL+12.0

GOOSE EXCLUSION FENCEBEGINS AT EL+5.0

GOOSE EXCLUSION FENCEENDS AT EL+12.0

FINAL DESIGN

SEATTLE/TUKWILA, WA BOEING PLANT 2 SHORELINE AREAS FINAL HABITAT DESIGN NOT APPROVED FOR CONSTRUCTION

CONSTRUCTION SPECIFICATIONSSECTION 02810

IRRIGATIONSEPTEMBER 2012

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PART 1 – GENERAL

1.01 SUMMARY

Furnish all labor, materials, equipment, and related items necessary to complete the work shown on the design drawings and/or specifications to provide temporary irrigation within the Riparian planting zones for both North and South shoreline areas. Work to be performed includes, but is not limited to, the following items:

A. Provide and install irrigation heads, quick couplers, fittings, valves, valve boxes, and strainer system.

B. Provide and install backflow device.

C. Provide and install valve control wire and controller.

D. Guarantee maintenance and protection.

E. Coordinate with separate contractors.

F. Provide all other related items required to complete the work following the best accepted trade practices.

1.02 LIMITATIONS ON SEQUENCE OF WORK

A. Section 02200: Earthwork

B. Section 02925: Landscaping

1.03 GENERAL REQUIREMENTS

A. The irrigation system shall be temporary; piping shall be on-grade and secured to grade. The system shall operate for a period sufficient to establish plant and seeded material and to provide sufficient coverage so as to prevent soil erosion.

B. System shall be designed to operate correctly at the lowest available operational pressure expected during the year and shall withstand water system surges.

1.04 PROTECTION OF WORK, PROPERTY, UTILITIES, AND PERSONS

A. Provide protection of all property, persons, work in progress, structures, existing landscape and irrigation work to remain, utilities, walls, walks, curbs, paved surfaces, drainage materials, water proofing membrane, and all survey markers and monuments from damages incurred arising from this Contract. The Contractor shall pay for any such damage at no additional cost to Owner.




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B. Verify locations of all underground utilities prior to commencement of work. Locations of existing known utilities shown on design drawings are approximate locations. The Contractor shall be responsible for the protection of said utilities. Promptly notify the Owner’s Representative of any conflict between proposed work and obstructions.

1.05 SUBMITTALS

A. Submit a Temporary Irrigation Plan for approval by the Engineer at least 10 working days prior to ordering the materials for the irrigation system. The plan shall describe the methods, materials, and manufactures list for construction both graphically and in writing. The plan shall show diagrammatic layout. Actual layout will be adjusted per actual field conditions.

B. Maintenance Schedule: Submit to Owner’s Representative a schedule of watering and maintenance activities to be performed by Contractor during the construction and maintenance period of the Contract. The schedule shall delineate specific activities and their frequency during the period between time of initial work and final acceptance, and shall be submitted to the Engineer prior to provisional acceptance.

C. Supply Engineer with four sets of irrigation system operating and Maintenance instructions (an Operating Manual). The manual shall include as-built drawing of the temporary irrigation system, control settings, a valve sequence operation diagram, list of installed parts, and recommended spare parts list for all equipment installed at the facility prior to the start of the system checkout. The four copies shall be neat, clean copies and shall include catalogs and shop drawings where applicable. Information concerning other models or equipment not supplied shall be omitted or crossed out. Copies of Operating Manual shall be provided in three-ring binders.

1.06 CLEANUP

A. Clean all paved surfaces and planted areas of soil and debris on a daily basis.

B. Clean all paved surfaces affected by irrigation work prior to final acceptance.

C. Clean up spills of glues and solvents immediately and report them immediately to Boeing’s Construction Manager.

1.07 MAINTENANCE

A. Provide maintenance of the irrigation system until 30 days beyond final acceptance. Maintenance shall include head and nozzle adjustment, setting and adjusting controller times, and replacing defective materials.




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1.08 GUARANTEE AND REPLACEMENT

A. All materials and workmanship shall be guaranteed for a period of one year. Guarantee period shall commence at the time of final acceptance. This guarantee period does not apply to work or damage done to the system by others after final acceptance.

1.09 PERMITS, CODES, AND ORDINANCES

A. Obtain and pay for all necessary permits and fees required by applicable codes and ordinances for this work that have not been procured by the Owner.

B. Comply with all applicable codes, regulations, and ordinances which pertain to this work. Consult with Owner or Owner’s Representative if there are questions regarding these requirements.

1.10 SUBSTITUTIONS

A. Upon acceptance by Engineer of the Temporary Irrigation Plan prepared by the Contractor, no material substitutions shall be made without written approval of the Engineer.

1.11 INSPECTIONS

A. Provide 48-hour notice for inspection of head layout, pressure tests, and performance tests.

1.12 OWNER INSPECTION

A. Prior to final acceptance of the work, provide the Owner with all keys, tools, and maintenance manuals necessary to operate/deactivate the irrigation system. The Contractor shall train and instruct Owner as to the operation and maintenance of the irrigation system.

1.13 LAYOUT

A. Verify the locations of all elements of the landscape installation prior to installation. Owner’s Representative reserves the right to adjust the locations of landscape elements during the installation period as appropriate.

1.14 AS-BUILTS

A. Prior to the final acceptance of the work, provide the Owner’s Representative with a set of clearly marked prints showing the actual locations of all irrigation elements. Keep a set of prints on the job site for “red-lining” record information and update said information as needed. Owner’s Representative reserves the right to review or request copies of such plans at any time during construction.




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1.15 COORDINATION

A. During the entire construction period, schedule and coordinate all work to avoid interference with the work of others. Schedule work hours, staging areas, access routes, parking, utility connections, and similar items under the direction of the Owner’s Representative.

PART 2 – PRODUCT

2.01 WATER SUPPLY

A. Point of connection shall be furnished by the Owner.

B. Test the point of connection to determine the available pressure and gallons per minute prior to installation of the irrigation system.

C. Water supply shall be clean and free of suspended particles, algae, or chemicals that may form insoluble precipitates in the equipment or may be detrimental to plantings.

2.02 BACKFLOW PREVENTION ASSEMBLY (BPA)

A. All water services shall have a City-approved BPA. Installation shall comply with applicable health and safety codes. Contractor shall contact Seattle Public Utilities Inspection Services for inspection of the installation after the BPA is installed and tested.

B. Install a “Y”-strainer to protect the BPA.

C. Install schedule 40 PVC ball valves at inlet and outlet to drain BPA for winterizing.

D. Pipe upstream of the BPA shall be schedule 40 PVC.

E. Pipe immediately downstream of the BPA shall be schedule 40 PVC.

2.03 PLASTIC PIPE

A. PVC 1120 or 1200, class 200 for all lateral piping (downstream from valves) and Schedule 40 for pressure lines.

B. Pipe to be marked with manufacturer’s name, class of pipe, National Sanitation Foundation (NSF) seal, and date and shift of manufacturing run. Pipe to bear no evidence of interior or exterior extrusion marks. Pipe walls to be uniform, smooth, and glossy. Pipe may be pre-belled or with individual solvent–weld couplings.

C. Fittings: Schedule 40, full size.

D. Sleeving: PVC Schedule 40 or better.




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2.04 CONTROL VALVES

A. Control valves shall be manifold where feasible, group together in valve boxes or individually installed in single valve box.

B. Valves shall be slow closing design, and automatically close in the event of power failure.

C. Valves shall be sized to provide adequate pressure differential for proper operation.

D. Valves may be battery operated.

E. PVC pipe upstream of the control valves shall be schedule 40.

F. PVC pipe immediately downstream of the valves shall be schedule 40.

2.05 SPRINKLER HEADS

A. Spray heads of different manufacturers or of different basic types (bubbler, stream, standard, low flow rate, impact, etc.) shall have consistent operating characteristics on any single lateral circuit.

B. Spray heads on same lateral circuit shall be balanced for matched precipitation rates within five percent from the average for any different arcs of coverage or operating radii.

C. Sprinkler heads shall be designed so that spray adjustments can be made by either an adjustment screw or interchangeable nozzles.

2.06 CONTROLLERS

A. Electrical service point of connection for the irrigation system controller shall be provided by the Owner.

B. Controllers shall be installed in weather-proof enclosures. Controllers will be installed “freestanding” unless otherwise approved in writing. They shall be located at a prime observation area with good access and free from irrigation overspray.

C. Controllers will not be required when battery-operated valves with built in timers are used.

2.07 ISOLATION VALVE

A. Provide up to two mainline isolation valves to be located upstream from the backflow preventer. Valve shall be schedule 40 PVC.

B. Provide valves to divide the irrigation system into controllable units, and to avoid draining long runs of piping for system repairs.




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2.08 CONTROL WIRE

A. Wire shall be #14 UF direct burial wire. White shall be the common wire, red the valve impulse wire, yellow the master valve wire, with a fourth color of wire provided as a spare.

B. Wire shall not be required with use of battery operated valves.

2.09 RISERS

A. Risers shall be fixed schedule 40 and staked.

2.10 QUICK COUPLING VALVES

A. Provide a quick coupler with lid for blow out.

2.11 VALVE BOXES

A. Provide standard 12-inch valve box for all valves; 6-inch valve box for quick couplers and gate valves.

2.12 DRAIN VALVES

A. Provide inlet and outlet drain valves to sufficiently winterize system. Other drainage features may be added to winterize system.

PART 3 – EXECUTION

3.01 GENERAL

A. Verify in writing to the Engineer that adequate water flow volume and pressure are available to properly operate the irrigation system prior to installation of the irrigation system.

3.02 SLEEVING

A. Install sleeves under all paved surfaces as required to facilitate installation of the irrigation work.

B. Sleeves shall be a minimum of twice the insert pipe diameter. Wire sleeves shall be a minimum of 2 inches in diameter.

C. Sleeves shall extend a minimum of 12 inches beyond the edge of all paved surfaces including, curbs, walks, and walls.

D. Backfill and compact all excavated areas to 95 percent maximum dry density per ASTM D-1557.




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3.03 BACKFLOW PREVENTION ASSEMBLY (BPA) AND STRAINER

A. Install BPA and strainer system per local code requirements. BPA shall be plumbed with unions on each side to facilitate removal during winter months.

B. Flush lines prior to installation of BPA.

C. Set BPA with a minimum clearance of 12 inches.

D. Install strainer upstream of the BPA.

E. Install BPA in a location where it will be accessible for periodic testing and maintenance.

F. Provide inlet and outlet drain valve on each side of BPA for winterizing.

G. Place BPA between the water meter and irrigation system.

H. BPA assembly shall be kept away from pedestrian travel ways and housed within an enclosure.

3.04 SPRINKLERS

A. Install sprinklers aboveground and secure to prevent from leaning or falling over.

B. Install sprinkler heads perpendicular to finish elevation.

3.05 RISERS

A. Risers shall be set a minimum of 18 inches above finish grade. Stake each riser to secure from movement; riser shall be plumb to adjacent grade.

3.06 VALVES

A. Group valves where possible in planting beds or in orderly fashion.

3.07 QUICK COUPLING VALVES

A. Install fitting between water meter and backflow preventer. Stake as necessary to secure.

3.08 CONTROL WIRING

A. Install control wires in continuous runs and tape wires in bundles at 10-foot intervals. Tape bundles to the bottom of mainline at 10-foot intervals.

B. Provide a 24-inch loop of excess control wire at each valve box.

C. All wire splices shall be made with a waterproof, direct-bury connector.




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D. Provide a separate color-coded common wire and control wire from the master valve to the satellite controller. If more than one satellite controller is assigned to the same master valve, provide a separate color-coded common control wire from each additional satellite controller to the master satellite.

3.09 WOOD POST

A. Install wood post at location approved by Owner and nearest the electrical source.

B. Dig hole and set post a minimum of 2 feet below nearest finish grade. Backfill around post and compact.

C. Post shall be installed perpendicular to finish elevation.

3.10 CONTROLLER

A. Provide 120 volt power from electrical source provided by Owner to and into the irrigation controller. Provide all other electrical work necessary to make the equipment operate properly.

B. Mount the controller per the manufacturer’s specifications in the location approved by the Owner. Controller will be exterior mounted on a treated 4x4 wooden post.

C. Sequence the valves per the number system on the plans. Affix a weatherproof copy of sequence diagram to the inside of the controller cabinet door. Provide copy of valve sequence in operations manual (Paragraph 1.05.C).

3.11 PIPE FITTINGS

A. Transport and store pipe on a flat even surface.

B. Seal all threaded joints with Teflon tape. No PVC shall be threaded or connected to a threaded fitting without an adapter.

C. Keep pipe free from dirt or debris at all times. Cover ends of pipe when not in progress of installation.

D. Connect pipe using two-step solvent weld process. Do not move or handle pipe for a minimum of 15 minutes while solvent welds are curing. No water shall be permitted in pipe until a period of at least 10 hours has elapsed for solvent welds to sit and cure. The joints shall be allowed to cure at least 24 hours before pressure is applied to the system.

3.12 FLUSHING

A. Flush all mainlines once prior to the insulation of the valves, and again after the installation of the valves and prior to pressure testing.

B. Flush all lateral lines prior to installation of sprinkler nozzles.




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3.13 PRESSURE TEST

A. Leave all joints and connections exposed until after completion and acceptance of pressure test.

B. Entire mainline shall be capped and pressurized to 100 psi for a period of 2 hours.

C. Visually check all joints and connections for leaks. Repair any visible leaks.

3.14 PERFORMANCE TESTS

A. Operate the system in the presence of the Engineer. Engineer may request that up to 5 percent of total nozzles be replaced, as appropriate to site conditions, at no additional cost to Owner.

3.15 TRAINING

A. Provide control system programming and operations training to the Engineer prior to final acceptance.

3.16 FINAL ACCEPTANCE

A. Complete all punch list items and submit signed and approved sprinkler/plumbing/health/electrical permits as applicable for final acceptance.

END OF SECTION

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CONSTRUCTION SPECIFICATIONSSECTION 02925LANDSCAPING

SEPTEMBER 2012

02925 - 1

PART 1 – GENERAL

1.01 SUMMARY

A. Furnish all labor, materials, equipment and related items necessary to complete the work shown on the Drawings and or Specifications for both the North and South Shoreline Areas. The items of work to be performed include but are not limited to:

1. Treatment of finish grade;

2. Seeding and planting of specified plant materials;

3. Installation of plants, wood mulch, fertilizer, amendments, large woody debris, goose exclusion fence, pre-vegetated mats, coir erosion fabric, and fish net pilings;

4. Guarantee maintenance and protection;

5. Coordination with separate contractors; and

6. All other related items required to complete the work in the best accepted trade practices.

1.02 LIMITATIONS ON SEQUENCE OF WORK

A. Section 02200: Earthwork

B. Section 02810: Irrigation

1.03 DEFINITION OF TERMS

A. The term “Contractor” as used in this Specification Section shall refer to the Contractor selected by owner. Contractor may elect to subcontract all or part of the landscape work described in this section.

1.04 PROTECTION OF WORK, PROPERTY, UTILITIES AND PERSONS

A. Provide protection for all property, persons, work in progress, structures, existing landscape work to remain, utilities, walls, walks, curbs, paved surfaces, drainage materials, water-proofing membrane, and all survey markers and monuments from damages incurred arising from this Contract. Contractor shall pay for any such damage at no additional cost to Owner.

B. Verify locations of all underground utilities prior to commencement of work. Approximate locations of existing known utilities have been shown on Architectural/Engineering or Survey Drawings. Contractor shall be responsible for



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verifying locations of utilities and for the protection of said utilities. Promptly notify the Owner’s Representative of any conflict between proposed work and obstructions.

1.05 SUBMITTALS

A. Maintenance Schedule: Contractor shall submit to Owner’s Representative a schedule of watering and maintenance activities to be performed by Contractor during the construction and maintenance period of the Contract. The schedule shall delineate specific activities and their frequency during the period between time of initial planting and final acceptance, and shall be submitted to the Engineer prior to provisional acceptance.

B. Material Sample: Submit the source name and a sample of compost and wood mulch, (minimum 0.5 pound) for approval prior to delivery and use of compost and wood mulch for on the Project.

C. Compost: Submit a 1-cubic-foot sample of material and test results for compost proposed for the Project.

D. The Contractor shall submit and pay for all material testing. Approval by Owner’s Representative shall be obtained prior to delivery and use of any material on the Project.

E. Provide soil analysis of the prepared planting areas and propose fertilizer composition based on existing soil conditions following completion of earthwork.

F. Large woody debris: Submit material samples and describe the methods for installation of large woody debris. Provide manufacturer’s data sheets for; anchor bolts, shackles, chain, earth anchors, and wood staples.

G. Goose Fence: Submit specifications of the materials to be used and methods for installation of the goose fence. Information to be provided shall include manufacturer’s data sheets for fiberglass posts, steel t-bar post, low stretch synthetic or aramid® fiber rope, nylon rope, nonwoven polyethylene netting with 4-inch-maximum openings, self-locking tie-nylon, and 11/16-inch diameter stainless steel clips. The low-stretch synthetic or aramid® fiber rope shall have, anti-UV coating, a minimum 5-year life, and a minimum of 8,000 pounds strength.

H. Provide diagrammatic shop drawings for deviations from design and specifications for the goose exclusion fence.

1.06 CLEANUP

A. Clean all paved surfaces and planted areas of soil and debris on a daily basis.

B. Clean all paved surfaces affected by landscape work prior to final acceptance.



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1.07 MAINTENANCE

A. Provide landscape maintenance beginning at the first installation of plant material and continuing 30 days beyond final acceptance of the landscape and irrigation installation; including watering, weeding, spraying, fertilizing, resetting of plants, removal of dead or damaged plants, replanting, and adjustment of staking.

1.08 GUARANTEE AND REPLACEMENT

A. All materials and workmanship shall be guaranteed for a period of one year. Guarantee period shall commence at the time of final acceptance.

B. Regrade and add or remove topsoil as required to any finished landscape surfaces that have settled or become uneven during the guarantee period. Identify plants to be replaced with flagging and leave plants in place until approved by owner. Perform guarantee inspections a minimum of once a month during guarantee period and furnish the Owner with monthly written documentation of all materials flagged, removed, or replaced, as well as their locations, species type, and quantities. Contractor shall replace any dead, damaged, diseased, dying, or missing plant material at no cost to the Owner during the guarantee period. Replacement plants shall be as specified and guaranteed until completion of the guarantee period.

C. Reposition plant material that settles or shifts from upright position during the guarantee period.

D. Guarantee does not apply to plant materials or other work damaged or destroyed by vandalism, vehicular damage by Others, or Acts of God during the guarantee period. It is the responsibility of the Contractor to assure that the site is receiving proper maintenance during the guarantee period. Owner shall be given 30 days written notice by the Contractor to rectify substandard maintenance prior to the Contractor rejecting any guarantee claims. Guarantee claims may only be voided due to substandard maintenance if the Owner takes no action to correct the identified substandard practices during the 30-day notice period.

1.09 PERMITS, CODES AND ORDINANCES

A. Obtain and pay for all necessary permits and fees required by applicable codes and ordinances for this work that have not been procured by the Owner.

B. Comply with all applicable codes, regulations, and ordinances that pertain to this work. Consult with Owner if there are questions regarding these requirements.

1.10 SUBSTITUTIONS

A. Substitutions of plant materials will not be permitted, unless authorized in writing by the Owner 30 days prior to scheduled start date of installation. If proof is submitted that a specified plant is not obtainable, a proposal will be considered for use of the nearest equivalent size or variety with corresponding adjustment of contract price.



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1.11 PLANT PROCUREMENT

A. Within 30 days of award of Contract, submit documentation to the Owner’s Representative that all specified plant materials have been ordered and secured. List supplier names, addresses, phone numbers, and the storage/growing location of the materials.

1.12 PLANT MATERIAL INSPECTION

A. The Owner’s Representative will inspect all plant materials at the job site, including previously tagged trees. All material must be inspected by the Owner’s Representative prior to planting. Trees must be untied and separated for inspections. Owner’s Representative reserves the right to refuse any/all plant material that does not meet the requirements of the drawings and specifications at any time prior to final acceptance. Remove rejected plant material immediately from the site.

1.13 STEEL PILINGS

A. Pilings shall be installed and removed using vibratory equipment to the extent practical. When pilings are installed in the dry use of the impact driver is acceptable. When pilings are installed in the wet, a vibratory method is required. Prior to install of pilings Contractor shall notify Owner’s Representative of methods to be used for approval. Maintain original and accurate records of all pilings driven. Records are to include the following:

1. Sizes, depths, and locations of pilings;

2. Sequences of driving;

3. Final toe and head elevations;

4. Initial excavated surface elevation;

5. Description of soil type and conditions;

6. Driving length;

7. Method of splicing, if any, and location of splice and method of splicing;

8. Description of the hammer, mass, drop, and its actual rate of operation during the driving of the test piling;

9. Energy of the blow;

10. Description and condition of the piling and its driving record, including the number of hammer blows per meter of driving; and

11. Date and time piling placed.



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B. Maintain original and accurate records identifying each piling, its total penetration, behavior during driving or installation, and any deviation from the designated location, alignment, and load-carrying capacity.

C. Maintain original and accurate records of any borings or other subsurface information obtained during the installation of pilings.

D. Notify the Owner immediately if subsurface conditions differ significantly from those indicated in the geotechnical investigation report.

E. Do not use driving methods that would cause excessive vibration or damage to nearby or existing structures.

F. Deliver, handle, and store steel pipe and concrete reinforcement in a manner that prevents excessive rust and contamination from dirt, grease, and other deleterious substances.

G. Store the pipes clear of the ground, contaminants, and muddy areas.

H. The pile location at the pile cut-off elevation shall be within 2 inches in any direction from the location shown on the drawing.

I. Install pilings at elevation +5 feet mean lower low water (MLLW). Top of piles shall be set to elevation +17 feet MLLW.

J. The pilings shall be located so that they are outside the goose exclusion fence.

K. The piling cutoff elevation shall be within 1 inch of the specified elevation.

1.14 LAYOUT

A. Verify the locations of all elements of the landscape installation prior to installation. Owner’s Representative reserves the right to adjust the locations of landscape elements during the installation period as appropriate.

1.15 AS-BUILTS

A. Provide Owner’s Representative with a set of clearly marked prints showing the actual location of all landscape elements prior to the final acceptance of the work. Keep a set of prints on the job site for “red-lining” record information and update said information as needed. Owner’s Representative reserves the right to review or request copies of such plans at any time during construction.

1.16 COORDINATION

A. Schedule and coordinate all work with Others to avoid interference with the work of others as well as Owner’s employees.



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PART 2 – PRODUCT

2.01 COMPOST MIX

A. Compost shall be in accordance with Section 02200.

2.02 WOOD MULCH

A. Mulch shall be aged, coarse-ground waste by-product wood chips ranging in size from 0.5 inch to 6 inches (along the longest dimension) and derived from the mechanical grinding or shredding of whole trees or portions of trees. Mulch shall be free of other of plant materials, weed seeds, or substances injurious to plant growth. There shall be no obvious disproportionate ratio in sizes of wood chips.

B. Mulch source shall be mixed hardwood and softwood tree species, such as hemlock and Douglas fir. Mulch may contain ground or shredded bark fines. Fines content shall not be greater than 20 percent of the mix.

C. Wood chip mulch shall be free from weeds, weed seeds, deleterious materials, foreign materials, resin, tannin, or other compounds detrimental to plant life. Mulch containing any amount of cedar wood is unacceptable.

D. Install 4-inch depth of wood mulch within plant beds for Riparian buffer plants. Plants in seeded areas shall have an 18-inch-radius grass-free ring covered with mulch. Plants within wet areas shall not receive wood mulch.

2.03 FERTILIZER

A. Planting fertilizers shall be phosphate-free and organic, with 50 percent nitrogen in slow-release form. Fertilizer shall be selected based upon the test data analysis. Furnish fertilizer in standard unopened containers with weight, name of intended plant targets, nutrient content, and manufacturer's guaranteed statement of analysis clearly marked, in accordance with state and federal laws. Fertilizer shall be applied at the rate recommended by supplier.

2.04 PLANT MATERIALS

A. Plants are to be nursery grown (no collected plants) in climatic conditions similar to the Project Site and be of a size at least equal to size specified, measured with branches in normal growing position.

1. Measurements, caliper, branching, grading, quality, balling, and burlapping are to follow Code of Standards of American Association of Nurserymen in ASNS, unless otherwise specified.

2. Washington native plants are to be propagated from Western Washington genetic stock.



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3. All plant material shall be of accepted size standards as specified in American Standard for Nursery Stock – latest edition. All plants shall be of normal habit of growth, and shall be healthy, vigorous, and free of disease, insect eggs, and larvae.

4. Scientific nomenclature shall conform to Standard Plant Names, latest edition. Names not present in this listing shall conform to accepted scientific nomenclature in the nursery trade.

5. For trees and shrubs, no less than 10 percent of each variety or species of plant shall be accurately labeled. Plant material labels shall be durable, legible labels stating the correct scientific plant name.

6. All plants shall be at least equal to size specified on plant legends. Oversize plants are acceptable, but without increase in contract price. Trees and shrubs cut back from larger sizes will not be permitted.

B. Trees and shrubs shall exhibit overall form typical of the species, be uniformly branched with a symmetrical crown, and be sound, vigorous, healthy, and free from disease. Plants with damaged leaders, damaged bark, sunscalds, windburn, disfiguring knots, circling or girdling roots, or broken and cut limbs will be rejected.

C. Container-grown plants shall have been grown in the containers in which they are delivered for at least 6 months, but not over 2 years. Samples must prove no root-bound conditions exist. Root-bound plants and container plants that have cracked or broken balls of earth when taken from container will be rejected except upon written approval by the Engineer.

D. Plugs shall be thoroughly rooted and healthy and grown at a nursery. Plugs may be either container or bare root. Plant roots shall be a minimum size of 2-inch x 2-inch x 3-inch depth.

E. Pre-vegetated mat material shall be a biodegradable processed coconut fiber (coir) seeded or plugged with wetland plants for the appropriate elevations per the project plans. Prior to installation the plants shall have 100 percent cover of the mat if seeded or 80 percent cover if plugged. Mats shall be established at the nursery and well rooted to the mat prior to delivery to the Project site. The coir mat shall have a minimum flow velocity of 8 feet per second. Thickness and size of coir material may vary depending on vender’s preference. Seed sources shall be at a minimum 90 percent pure and 100 percent free from noxious weed seeds. Species and seed sources should originate within their native climate range and match the project areas to be planted. In all cases, seed should be obtained from local sources. The nursery from which seedlings are obtained should have the information on the source of the seed for each species grown. Seed should be carefully inspected at the time of pickup/delivery and again immediately before planting to determine condition of seed. All Compost shall be in accordance with Section 02200. Substitutions shall be preapproved by the Engineer prior to use. During the procurement of the mats, the Owner’s Representative shall be allowed to visit the growing site to review the general conditions and progress of the pre-vegetated mats. Emergent plants shall exhibit overall form typical of these species and be sound,



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vigorous, healthy, and free from disease. Plants that are wind burned, yellowing, dried out, or lacking growth will be rejected.

F. Replace rejected or damaged plants at no additional expense to the Owner.

G. Actual plant quantities shown on the drawings prevail over quantities shown on Plant Schedule in the event of discrepancy.

2.05 HYDROSEEDING

A. Riparian Buffer:

1. Seed Composition: See design drawings for seed mix. Seed furnished for installation shall be:

a. At least 90 percent pure and 100 percent free from noxious weed seeds;

b. At least 80 percent pure live seed, Grade A, recent crop;

c. Treated with appropriate fungicide at time of mixing;

d. Stored in a manner to prevent wetting and deterioration; and

e. Delivered to the Project site in sealed containers with dealer’s guaranteed analysis.

2. Inoculate legumes with appropriate nitrogen-fixing bacteria.

B. Fertilizer shall be phosphate free and organic, with 50 percent nitrogen in slow release form, as described in Paragraph 2.03: Fertilizer.

C. Mulch for hydroseeding shall consist of 50 percent specially processed cellulose fiber (100 percent recycled, post-consumer paper content) and 50 percent wood fiber mulch. Mulch product shall contain no growth or germination-inhibiting factors. Mulch shall be manufactured in such a manner that after addition and agitation in slurry tanks with water, the fibers in the material become uniformly suspended to form a homogeneous slurry. When sprayed on the ground, the material shall allow absorption and percolation of moisture. Each package of the cellulose fiber shall be marked by the manufacturer to show the air-dry weight content. Mulch shall be chemically inert and nontoxic to plants, humans, and animals.

D. Soil binding agent shall consist of nontoxic, biodegradable materials that are environmentally safe. Percentage of soil-binding agent shall not be less than 2 percent or greater than 10 percent by weight when mixed with wood fiber mulch.

2.06 EROSION CONTROL FABRIC

A. Erosion control fabric at a minimum shall be placed in locations identified in the plans. Erosion control fabric shall be the PermaTex Coir 400 or equal approved by Engineer,



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made from 100 percent coir twine woven into high strength mats for extreme slope stabilization.

2.07 LARGE WOODY DEBRIS

A. Large woody debris (LWD) shall consist of sound and intact Western red cedar or Douglas fir trees. As approved by the Engineer, existing on-site coniferous trees meeting the minimum diameter at breast height (DBH) and minimum length may be salvaged and used for LWD. LWD shall have a minimum DBH of 20 inches with attached root wads having a diameter two to three times that of the trunk diameter. LWD shall vary in length with a minimum length of 12 feet. Length of the LWD shall be measured from the top of the root wad to the end of the trunk. A mixture of varying species, lengths, and diameters of LWD shall be used.

2.08 GOOSE EXCLUSION FENCE

A. Fiberglass post: 7-foot minimum length with a diameter of 11/16 inch and UV rating, as required to protect the perimeter area of marsh plantings; see design drawings for specific locations.

B. Steel T-Bar Post: 6 foot minimum length as required to protect the interior of the marsh plantings; see design drawings for specific locations.

C. Synthetic or aramid® fiber rope: low-stretch synthetic or aramid® fiber rope with, anti-UV coating, minimum 5-year lifetime, and minimum 8,000-pound strength, as required to protect the perimeter of the marsh plantings.

D. Nylon rope: UV resistant as required to protect the interior of the marsh plantings.

E. Non-woven polyethylene netting: maximum grid opening of 4 inches, black color. See design drawings for specific locations.

F. Self-locking tie: nylon 6/6 (min. Grade), 50 pound minimum tensile strength, UV stabilized, as required to attach the polyethylene non-woven netting and nylon ropes to posts.

G. Stainless-steel clips: 11/16 inch diameter as required to attach the low-stretch synthetic or aramid® fiber rope to the fiberglass poles.

2.09 STEEL PILINGS

A. Pipe pilings shall be HSS 7.5 x 0.5 (Fy = 42 ksi), 52-foot-long minimum length with minimum of 40 feet embedment in ground.

B. If pilings are driven, use driving shoes of the same material as the pipe piling.

C. Welding materials shall be in accordance with American Welding Society requirements, and welding shall be performed using E70xx low-hydrogen type dry-welding electrodes.



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PART 3 – EXECUTION

3.01 GENERAL

A. Verify field conditions and that necessary preceding work has been completed and is satisfactory to receive work in this section. Commencement of work constitutes acceptance of conditions as satisfactory.

B. Do not seed when the temperature is below 55 degrees F. Under no circumstances will seeding during freezing weather or in frozen ground be permitted.

C. Remove all plant tags and flags prior to final inspection.

D. Ensure that debris, such as plant containers left over from work, is removed from work areas. Containers and other construction debris shall be removed from the project site by the Contractor and disposed of at an appropriate refuse center.

E. Confine operations including material and equipment storage, to working areas allotted by Owner for operations.

F. The Work site shall be progressively cleaned of debris and rubbish as Work proceeds.

G. Take necessary precautions to protect work in progress, property, persons, walks, curbs, pavement, fences, and buildings from any damage that might be incurred arising from this Contract. Do not mix planting soil directly on paved surfaces. Locate underground utilities prior to commencement of work. Damage incurred or arising from this Contract shall be paid by the Contractor.

3.02 HAND CLEARING OF INVASIVE PLANTS

A. Confirm limits of non-native invasive plants per field verification with Engineer before proceeding with clearing in these areas. This work shall be performed post clearing and grading activities to remove non-native invasive plants that may establish.

B. Notify Engineer one week prior to removal date.

C. Remove the following non-native invasive plants manually using hand tools and by hand pulling:

1. Himalayan Blackberry (Rubus armeniacus),

2. Japanese Knotweed (Polygonum cuspidatum),

3. Reed canary grass (Phalaris arundinacea),

4. English ivy (Hedera helix),

5. Black locust (Robinia pseudoacacia), and

6. All other invasive species that have not been specifically listed.



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D. Remove all aboveground plant material.

E. Remove belowground rhizomes and roots.

F. Transport plant, root, and rhizome materials carefully to avoid contamination of adjacent areas and travel corridors.

G. Remove and dispose of all invasive plant debris at an approved composting facility.

H. Herbicidal control of Japanese knotweed shall be accomplished prior to removal of the plants. Herbicides shall be applied during late spring/early summer and again during early fall of that same year. Herbicides shall be applied by direct injection and by foliar application. Application of herbicides shall be conducted only by those with a Washington State applicator’s license with an “aquatics” endorsement and after obtaining the needed approvals and permits.

I. Pesticides and herbicides shall not be used without written authorization from Engineer. At a minimum Contractor shall notify Engineer for approval 30 work days prior to use. Approval by local and federal agencies may also be required prior to use. Spraying shall be conducted only by those with a Washington State applicator’s license with an “aquatics” endorsement and an Aquatics Pest Management Permit from the Washington State Department of Ecology.

3.03 LANDSCAPE GRADING AND SOIL PREPARATION

A. Subgrade Treatment and Placement of Topsoil

1. Work shall have been performed prior to beginning landscaping work, following the guidance provided in Section 02200 Earthwork.

B. Finish Grading

1. Finish elevation shall have been prepared and completed prior to installation of plants.

3.04 FERTILIZER APPLICATION

A. Trees Shrubs and Plugs:

1. Apply fertilizers to trees, shrubs, and seeded areas at rates recommended by the manufacturer.

2. Fertilizers shall be used only for plantings within the riparian zone. No fertilizer shall be used for marsh plantings. Fertilizer shall be placed in planting pits at time of planting and shall not be broadcast on to soil surface. Efforts shall be taken to avoid fertilizers from coming into contact with waters of the state.



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3.05 PLANT MATERIAL INSTALLATION

A. Protect plant materials stored on site from weather damage, construction activity, and the public. Protect roots by covering with moist soil and mulch. Water as required to keep roots moist. Plant trees and shrubs per the planting details on the design drawings.

B. Riparian Buffer Plantings

1. Orient plants for best natural upright appearance and exposure.

2. Place trees first, and follow with shrubs.

3. Completely remove all container materials, including wire baskets, peat pots, ties, and labels, from root balls.

4. Notify the Owner’s Representative of any conditions detrimental to plant growth (such as rubble fill, stones, adverse drainage conditions, or obstructions) before planting. This material shall not be used for backfill.

5. Notify the Owner’s Representative if underground utilities, solid rock ledges, or other subsurface obstructions are encountered during planting so that alternative planting locations may be selected.

6. Avoid over-excavation of planting pits. Over-excavated pits shall not be used for planting, but rather shall be backfilled and a new planting prepared within close proximity.

7. Add granules of fertilizer to planting pits according to manufacturer’s directions.

8. Planting pits shall be dug to produce vertical sides and flat, uncompacted bottoms. If the sides become glazed, the glazed surface shall be scarified. The size of plant pits shall be as shown on plans.

9. Set plants in center of planting pits, on uncompacted backfill consisting of native soils that have been amended with compost (25 percent compost by weight).

10. Planting pits will be backfilled with amended Class 2 sand (in accordance with Section 02200) that is free of rocks over ¾ inch in diameter and less than 25 percent of the backfill shall contain stones regardless of dimensions.

11. Prune broken roots and stem.

12. Plants shall have the same relationship with finish grade after settlement as they bore at natural grade.

13. Hold firmly in position and place backfill mixture carefully, avoiding root damage and filling voids. When planting pit is approximately two-thirds full, compact fill by watering to avoid air pockets. Water to settle.



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C. Marsh Plantings

1. Survey marsh planting areas in the field using lath or other accepted means to identify planting elevations. Survey Work shall be completed a minimum of 1 week prior to planting and shall be reviewed by the Engineer prior to planting.

2. Plants shall be inspected and approved by the Engineer. Rejected material shall be removed from the project site and replaced with equal to be approved by Engineer.

3. Planting for all areas between +5.5 feet MLLW to +12.0 feet MLLW will be performed at low tide.

4. No planting shall be done during unsuitable conditions, such as, but not limited to, frozen soil, standing water, high winds, or heavy rains.

5. See plans for planting requirements.

6. Plugs shall be keep moist at all times until planting. Each species group shall be accompanied by a delivery slip indicating the: (1) species (scientific and common name), and (2) quantity being delivered. Delivery slips are to be signed by the Contractor. Copies shall be provided to the Engineer. Plant material shall be approved by the Engineer prior to acceptance. Dead, dying, or yellowing plants and plants with inadequate roots will be rejected. Minimize the size of the planting pit during planting and plant within the coir fabric at the species specific locations shown on the plans.

7. Planting within the coir mat or the erosion control fabric with plugs may require scoring the fabric to create an opening to install the plants. Scoring of fabric shall be minimal and may need to be fastened with metal landscape staples or wood stakes to guarantee plants are securely held in place to prevent them from becoming dislodged by tidal influence or boat wakes.

8. See plans for location of plant species and material types.

9. Install pre-vegetated mats. See plans for locations and planting requirements. The Contractor shall be responsible for maintaining, handling, transporting, and general quality of the pre-vegetated mats. Materials shall be maintained to achieve 100 percent survival during transportation, and shall not be allowed to dry out. Delivery of pre-vegetated mats shall coincide with the immediate installation at the project site. If not planted immediately, mats shall be stored in a shady location and kept thoroughly saturated and covered with shade cloth to prevent the material from drying out. Storage of the material onsite shall be no longer than three days. Upon delivery to site, each mat shall be tagged with the individual species scientific and common name for review and approval by the Engineer prior to placement and planting. Post-installation the Contractor shall provide regular maintenance to promote plant health and vigor and inspect mats to guarantee they are secure. If mats become loose, they shall be immediately re-staked and secured. If required, additional anchoring methods may be performed at no additional charge to the



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Owner. Anchoring methods other than staking shall be preapproved by the Engineer. Care shall be taken to minimize disturbance of plants.

3.06 HYDROSEEDING

A. Hydroseed areas as shown on the Drawings. Contractor shall give the Engineer notice of seeding operation 48 hours prior to seeding.

B. Apply fertilizer, seed, and mulch in one operation using approved hydraulic equipment at the following rates:

1. Recycled paper/wood fiber mulch combination: 50 pounds per 1,000 square feet.

2. Seed: 10 pounds per 1,000 square feet.

3. Fertilizer: 10 pounds per 1,000 square feet or as recommended by supplier.

4. Soil Binding Agent: 1 pound per 1,000 square feet or as recommended by supplier.

C. Do not hydroseed during windy weather or when temperatures are below 55 degrees F. Seeding season is March 1 to October 31, when supplemented with water. Do not hydroseed before or after these dates without written approval by the Engineer. Under no circumstances will seeding be permitted during windy weather or when ground is frozen, excessively wet, or otherwise un-tillable.

D. Do not seed areas that are inundated. If an area is to be inundated and is seeded, the seed shall have sufficient time to germinate prior to being inundated. Engineer shall inspect and provide written approval prior to inundation of an area.

E. Utilize water as carrying agent for equipment that has a continuous built-in agitation system. Equipment with a gear pump is not acceptable.

F. Pump a continuous, nonfluctuating supply of homogenous slurry to provide a uniform distribution of material over designated areas.

G. Promptly re-seed any areas which do not germinate within 14 days.

H. After establishment of seed, provide a clean definition between seeded and planted areas.

3.07 WOOD MULCH

A. Install mulch to the depth of 4 inches within plant beds for riparian buffer plants. Remove mulch from around the stems and trunks to provide smooth mulch surfaces. Plants in seeded areas shall have an 18-inch-radius grass-free ring covered with mulch. Plants within the marsh areas shall not be mulched.



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3.08 EROSION CONTROL FABRIC

A. At a minimum install fabric in locations shown on the design drawings.

B. Installation of erosion control fabric for all areas between +5.0 feet MLLW to +12.0 feet MLLW will be performed at low tide.

C. At the end of each work day all fabric shall be securely fastened to the ground to prevent it from floating away.

D. See design drawings for installation requirements.

3.09 LARGE WOODY DEBRIS

A. Install LWD in locations shown on the design drawings and as approved by the Owner’s Representative.

B. LWD shall be secured into place to prevent floating. Anchoring methods shall be field adjusted to guarantee that LWD is secured. Anchoring methods shall include the use of deadmen, chaining, and pinning where appropriate. Confirm methods with Owner’s Representative prior to installation.

C. Anchoring devices for LWD shall be driven to depths indicated on the design drawings.

D. LWD anchors shall be Manta Ray MR-1 or approved equal, and shall be installed as shown in the design drawings.

3.10 GOOSE EXCLUSION FENCE

A. Fencing shall be placed to protect marsh plantings. Fence installation shall conform to design drawings. Perimeter posts and fencing shall be installed prior to marsh planting. Plantings may be installed in zones so that upon completion of each marsh planting zone the overhead ropes can be installed to protect the newly installed plants. If the permanent goose exclusion fence has not been installed after planting, Contractor may be required at discretion of Engineer to establish a temporary exclusion fence to keep geese from eating the new plants.

B. Install goose exclusion fence to design height indicated on design drawings.

C. Space posts at intervals shown on design drawings. Any deviation shall be approved by Engineer prior to installation.

D. Set posts plumb and secure. Post locations and driven depths are indicated on the design drawings.

E. Secure rope and polyethylene netting to posts with approved methods. Methods and locations for securing the rope and netting are indicated on the design drawings.

F. Schedule work to avoid tidal inundations; install fence during low tide.



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G. Placement of the fence shall not interfere with access to the fish net pilings.

3.11 STEEL PILINGS

A. Cut pipe heads squarely and install driving cap to hold the axis of the piling in line with the axis of the hammer.

B. Use a cast or structural steel driving head for driving the piling; keep the piling heads from upsetting excessively under hard driving conditions.

C. Drive steel pipe pilings with either a vibratory drive head or a double-acting drop, steam, air, or diesel hammer. Maintain equipment in good condition at all times. Unless otherwise provided, ensure the hammers are capable of delivering a blow at normal speed with the required energy.

D. Drive or vibrate pilings to final length as continuous as possible.

E. Pilings driven in the dry may be installed using either a vibratory drive head or a hammer. To the extent possible pilings driven in the wet will be installed using a vibratory drive head.

F. Ensure the method of splicing is shown on shop drawings and ensure splices are such that the resultant vertical and lateral loads at the splices are adequately transmitted. Construct splices so as to provide and maintain true alignment and position of the component parts of the piling during installation and subsequent thereto.

G. Before welding, ensure that surfaces match uniformly. Use butt-type welds and ensure joints have a strength in compression and bending at least equal to the strength of the piling itself.

H. All welding shall be performed by certified welders. Welder’s certifications shall be current.

3.12 FINAL ACCEPTANCE

A. Final acceptance of the landscape work in this section will be made by the Owner’s Representative after an inspection to determine 100 percent completion of the contract work and all punch list items. The date of final acceptance constitutes the beginning of the one year guarantee period and beginning of the 30-day required maintenance period.

END OF SECTION

Documents

Habitat Construction Drawings and Specifications