Page 8-18 M 41-10
8-02 Roadside Restoration8-02 Roadside Restoration
8-02.1 Description
This Work consists of preserving, maintaining, establishing and augmenting vegetation on the roadsides and within mitigation or sundry site areas. It includes vegetation preservation, weed and pest control, furnishing and placing topsoil, compost, and soil amendments, and furnishing and planting seed, sod and plants of all forms and container types. It includes performing plant establishment activities and soil bioengineering. Work shall be performed in accordance with these Specifications and as shown in the Plans or as designated by the Engineer. Trees, whips, shrubs, ground covers, cuttings, live stakes, live poles, live branches, rhizomes, tubers, rootstock, and seedlings will hereinafter be referred to collectively as “plants” or “plant material”. Grass, wildflowers, and other plant materials installed in seed form will hereinafter be referred to collectively as “seed”.
8-02.2 Materials
Materials shall meet the requirements of the following sections: Topsoil 9-14.2 Seed 9-14.3 Fertilizer 9-14.4 Mulch and Amendments 9-14.5 Erosion Control Devices 9-14.6 Plant Materials 9-14.7 Stakes, Guys, and Wrapping 9-14.8 Water 9-25.2 Botanical identification and nomenclature of plant materials shall be based on descriptions by Hitchcock and Cronquist in “Flora of the Pacific Northwest”. Botanical identification and nomenclature of plant material not found in "Flora" shall be based on Bailey in “Hortus Third” or superseding editions and amendments or as referenced in the Plans.
8-02.3 Construction Requirements
8-02.3(1) Responsibility During Construction
The Contractor shall prepare, install, and ensure adequate and proper care of all roadside seeded, planted, and lawn areas on the project until all plant establishment periods required by the Contract are complete or until Physical Completion of the project, whichever is last. Adequate and proper care shall include, but is not limited to, keeping all plant material in a healthy, growing condition by watering, pruning, and other actions deemed necessary for plant health. This Work shall include keeping the project area free from insect infestation, weeds or unwanted vegetation, litter, and other debris along with retaining the finished grades and mulch in a neat uniform condition. Existing desirable vegetation shall be saved and protected unless removal is required by the Contract or allowed by the Engineer. The Contractor shall have sole responsibility for the maintenance and appearance of the roadside restoration.
8-02.3(2) Work Plans
Three Work Plan submittals under this section:
1.Roadside Work Plan: This plan is required when Work will disturb the roadside beyond 20 feet from the pavement or where trees or native vegetation will be removed. The Contractor shall submit a Type 3 Working Drawing within 15 calendar days prior to any earth disturbing activities. M 41-10 Page 8-19 Roadside Restoration 8-022. Weed and Pest Control Plan: This plan is required when the proposal requires the use of chemicals, weed control activities or when the proposal contains the item “Project Area Weed and Pest Control”. The Contractor shall submit for approval the Weed and Pest Control Plan as a Type 3 Working Drawing. The plan shall be submitted at the same time as the Roadside Work Plan. The plan will require approval prior to beginning the following additional activities: selective clearing, surface preparation, application of chemical pesticides, or any weed control activities.
3.Plant Establishment Plan: This plan is required when the proposal contains the item “PSIPE__”, and prior to completion of Initial Planting. The Contractor shall submit a Type 2 Working Drawing.
8-02.3(2)A Roadside Work Plan
The Roadside Work Plan shall define the expected impacts to the roadside and restoration resulting from Work necessary to meet all Contract requirements. The Contractor shall define how the roadside restoration Work included in the Contract will be phased and coordinated with project Work such as earthwork, staging, access, erosion and water pollution control, irrigation, etc. The Roadside Work Plan shall include the following:
1.Limiting impacts to roadsides:
a.Limits of Work including locations of staging or parking.
b.Means and methods for vegetation protection (in accordance with Section 1-07.16(2) ).
c.Locations outside of clearing limits where vegetation shall be removed to provide access routes or other needs to accomplish the Work.
d.Plans for removal, preservation and stockpile of topsoil or other native materials, if outside of clearing and grubbing limits and within the project limits.
2.Roadside Restoration:
a.Plan for propagation and procurement of plants, ground preparation for planting, and installation of plants.
b.Means and methods to limit soil compaction where seeding and planting are to occur, such as steel plates, hog fuel access roads, wood mats for sensitive areas (including removal) and decompaction for unavoidable impacts.
c.Plan and timing to incorporate or remove erosion control items.
3.Lawn Installation:
a.Schedule for lawn installation Work.
b.Establishment and maintenance of lawns.
8-02.3(2)B Weed and Pest Control Plan
The Weed and Pest Control Plan shall describe all weed and pest control needs for the project. The plan shall be prepared and signed by a licensed Commercial Pest Control Operator or Consultant. The plan for control of weeds and pests on the Contract in accordance with
1.Names of plan preparer and pesticide operators, including contact information. The Contractor shall provide the Engineer evidence that all operators are licensed with appropriate endorsements, and that the pesticide used is registered for use by the Washington State Department of Agriculture.
2.Means and methods of weed control, including mechanical and/or chemical. The Contractor shall provide a site plan indicating where the noted methods of weed control will be implemented. Page 8-20 M 41-10
8-02 Roadside Restoration3. Schedule and timing for weed control including re-entry times for pesticide
application by pesticide type.
4.Proposed pesticide use in accordance with Section 8-02.3(3)A : name, application rate, and Safety Data Sheets of all proposed pesticides. The Contractor shall provide a copy of the current product label for each pesticide to be used.
5.Plan to ensure worker safety until pesticide re-entry periods are met.
6.Site management and control protocol for all anticipated pests including herbivory (browse and girdling), fungal and insect infestations, and all applicable aquatic invasive species per RCW 77.135.010. Document equipment cleaning and/or sterilization protocols in accordance with Section 1-05.9, including provisions to prevent the spread of listed species.
7.The Contractor shall provide a copy of the Traffic Control Plan for accessing the site to ensure the safety of all staff during the process of taking materials on and off the site.
8-02.3(2)C Plant Establishment Plan
The Plant Establishment Plan shall describe activities necessary to ensure continued health and vigor of planted and seeded areas in accordance with the requirements of Sections 8-02.3(12) and 8-02.3(13) . Should the plan become unworkable at any time during the first-year plant establishment, the Contractor shall submit a revised plan prior to proceeding with further Work. The Plant Establishment Plan shall include:
1.Proposed scheduling of joint inspection meetings, activities, materials, equipment to be utilized for the first-year plant establishment.
2.Proposed adaptive management activities to ensure successful establishment of seeded, sodded, and planted areas.
3.A contact person for the duration of the contract.
4.Management of the irrigation system or watering plan.
8-02.3(3) Weed and Pest Control
The Contractor shall control weed and pest species within the project area using integrated pest management principles consisting of mechanical, biological, and chemical controls that are outlined in the Weed and Pest Control Plan or as designated by the Engineer. Controlling weeds consists of killing and removing weeds by chemical, mechanical, and hand methods.
8-02.3(3)A Chemical Pesticides
Chemical pesticides include, but are not restricted to, any substance or mixture of substances intended for preventing, destroying, repelling or mitigating any pest, including but not limited to, insecticides, herbicides, fungicides, adjuvants, and additives, including plant regulators, defoliants and desiccants. The Contractor shall apply chemical pesticides in accordance with the label recommendations, the Washington State Department of Ecology, local sensitive area ordinances, and Washington State Department of Agriculture laws and regulations. Only those pesticides listed in the table Herbicides Approved for Use on WSDOT Rights of Way and accepted as part of the Weed and Pest Control Plan or by written authorization from the Engineer may be used ( https:/ /wsdot.wa.gov/ construction-planning/protecting-environment/maintaining-vegetation-along-our- highways/using-herbicides ). All personnel applying chemical pesticides within the project limits, including off-site mitigation, staging, and stockpile areas, shall be licensed by the State of Washington as a Commercial Applicator or Commercial Operator, with additional endorsements as required by the Special Provisions, physical work locations, or the proposed Weed and Pest Control Plan. All licenses and endorsements shall be current and in good standing for the duration M 41-10 Page 8-21 Roadside Restoration 8-02of the project. All chemical pesticides shall be delivered to the job site in the original containers, or if pre-mixed off-site, a certification of the components and formulation from the supplier is required. The licensed applicator or operator shall complete WSDOT Form 540-509, Commercial Pesticide Application Record, each day the pesticide is applied and furnish a copy to the Engineer by the following business day. The Contractor shall ensure confinement of the chemicals within the designated areas. The use of spray chemical pesticides shall require the use of anti-drift and activating agents and a spray pattern indicator unless otherwise allowed by the Engineer. The Contractor shall assume all responsibility for rendering any area unsatisfactory for planting by reason of chemical application. Damage to adjacent areas, either on or off the Highway Right of Way, shall be repaired to the satisfaction of the Engineer or the property owner at no additional cost to the Contracting Agency.
8-02.3(3)B Roadside Seeding, Planting and Lawn Area Weed Control
Seeding, planting and lawn area weed control consists of controlling weeds and pests in seeded, planted and lawn areas shown in the Plans. This Work is included in the bid items for seeding, planting and lawn installation. All seeding, planting and lawn areas shall be prepared so that they are weed and debris free at the time of planting and until completion of the project. The planting areas shall include the entire ground surface, regardless of cover, areas around plants, and those areas shown in the Plans. Within seeding, planting or lawn areas, all species that are not shown in the Plans are unwanted and shall be controlled unless specifically allowed by the Engineer to remain. Grass growing within the mulch ring of a plant, including grass applied in accordance with Sections 8-01.3(2) , 8-02.3(9) or 8-02.3(10) , shall be considered a weed and shall be controlled on the project in accordance with the weed and pest control plan. All applications of post-emergent herbicides shall be made while green and growing tissue is present. Residual herbicides shall not be used where rhizomatous species or perennial species are indicated. Should unwanted vegetation reach the flowering and seed stage in violation of these Specifications, the Contractor shall physically remove and bag the seed heads prior to seed dispersion. All physically removed vegetation and seed heads shall be disposed of off-site at no cost to the Contracting Agency.
8-02.3(3)C Project Area Weed and Pest Control
When the Bid Item “Project Area Weed and Pest Control” is included in the Contract the Contractor shall control all noxious weeds as directed by the Engineer within the project limits and not otherwise covered in Section 8-02.3(3)B . Noxious weeds are specified by the Washington State Department of Agriculture, the local Weed District, or the County Noxious Weed Control Board.
8-02.3(4) Topsoil
Topsoil shall not be worked or placed when the ground or topsoil is frozen, or excessively wet. The Contractor shall protect topsoil stockpiled for project use to prevent erosion and weed growth. Weed growth on topsoil stockpile sites shall be immediately eliminated in accordance with the accepted Weed and Pest Control Plan and Section 8-02.3(3) . The subsoil where topsoil is to be placed shall be tilled to a depth of 1 foot or as specified in the Special Provisions or the Plans. Topsoil of the type specified shall be evenly spread over the specified areas to the depth shown in the Plans or as otherwise ordered by the Engineer. Topsoil depths greater than 6 inches shall be placed in lifts no more than Page 8-22 M 41-10
8-02 Roadside Restoration6 inches in depth. The first lift of topsoil shall be incorporated with sub-soil to a depth of
8 inches and subsequent lifts placed and lightly tamped between lifts. After the topsoil has been spread, all large clods, hard lumps, and rocks 2 inches in diameter and larger, and litter shall be raked up, removed, and disposed.
8-02.3(4)A Topsoil Type A
Topsoil Type A shall be as specified in the Special Provisions. The Contractor shall submit a certification by the supplier that the contents of the Topsoil meet the requirements in the Special Provisions.
8-02.3(4)B Topsoil Type B
Topsoil Type B shall be taken from within the project limits. Topsoil Type B shall be taken from areas shown in the Plans to the designated depth and stockpiled at locations that will not interfere with the construction of the project, and outside of sensitive areas, as allowed by the Engineer. The general limits of the material to be utilized for topsoil will be indicated in the Plans or in the Special Provisions. The Engineer will make the final determination of the areas where the most suitable material exists within these general limits. Material for Topsoil Type B shall not be taken from a depth greater than 1 foot from the existing ground unless otherwise designated by the Engineer. Prior to topsoil removal, the Contractor shall reduce the native vegetation to a height not exceeding 1 foot. A minimum of two weeks prior to excavation of Topsoil Type B, the Contractor shall pre-treat the vegetation on the designated Topsoil Type B areas according to the Weed and Pest Control Plan. Areas beyond the slope stakes shall be disturbed as little as possible in the above operations and under no circumstances shall Topsoil Type B be stockpiled within 10 feet of any existing tree or vegetation area designated to be saved and protected. The Contractor shall protect topsoil stockpile from weed infestation. The Contractor shall set aside sufficient material to satisfy the needs of the project. Upon completion of topsoil placement, the Contractor shall dispose of remaining stockpiled Topsoil Type B not required for use on the project at no additional expense to the Contracting Agency in accordance with Section 2-03.3(7)C . Should a shortage of Topsoil Type B occur, and the Contractor has wasted or otherwise disposed of topsoil material, the Contractor shall furnish Topsoil Type A or C at no additional expense to the Contracting Agency.
8-02.3(4)C Topsoil Type C
Topsoil Type C shall be naturally occurring topsoil obtained from a source provided by the Contractor outside of the Contracting Agency-owned Right of Way. Topsoil Type C shall meet the requirements of Sections 8-02.3(4) and 8-02.3(4)B . The Contractor shall not begin removal of Topsoil Type C from the proposed source until the material has been allowed for use by the Engineer.
8-02.3(5) Roadside Seeding, Lawn and Planting Area Preparation
This Work includes preparing worked areas for the installation of all types of permanent erosion control planting. Work shall be conducted so the flow lines in drainage channels are maintained. Material displaced by the Contractor’s operations that interferes with drainage shall be removed from the channel and disposed of as allowed by the Engineer.
8-02.3(5)A Seeding Area Preparation
The Contractor shall prepare roadside seeding areas as follows:
1.Remove all excess material, debris, stumps, and rocks greater than 3 inches in diameter from areas to be seeded. Dispose of removed materials offsite.
2.Prepare roadside seeding area to a weed free and bare condition. M 41-10 Page 8-23 Roadside Restoration 8-023. Bring area to uniform grade and install topsoil, soil amendments, or compost as shown in the Plans. Do not till any slopes stepper than 2(H) to 1(V).
4.Compact to provide a reasonably firm but friable seedbed; tractor walk to uniformly cover the surface with longitudinal depressions at least 2 inches deep formed perpendicular to the natural flow of water on the slope. Condition the soil with sufficient water so the longitudinal depressions remain in the soil surface until completion of the seeding.
5.Seed and mulch within two days of preparation.
8-02.3(5)B Lawn Area Preparation
The Contractor shall prepare lawn areas as follows:
1.Prepare lawn area to a weed free and bare condition in accordance with
2.Remove excess material, stumps, wood or rocks over 3 inches in diameter and remove from site.
3.Bring area to uniform grade and install topsoil or soil amendments in accordance with
4.Till to an 8-inch depth, rake to a smooth even grade without low areas that trap water, and compact with a 50-pound roller. The finished grade of the soil shall be 1 inch below the top of all curbs, junction and valve boxes, walks, driveways, and other Structures.
5.Seed or sod the area within two days of preparation.
8-02.3(5)C Planting Area Preparation
The Contractor shall prepare planting areas as follows:
1.Prepare planting area to a weed free and bare condition in accordance with
2.When indicated in the plans or Special Provisions, soil shall be decompacted to a depth of 18 inches and returned to uniform grade even with surrounding areas, leaving no holes or mounds over 3 inches in depth or height. Any areas impacted by construction activities not in accordance with the Roadside Work Plan shall be decompacted.
3.Remove excess material, stumps, wood or rocks over 3 inches in diameter and remove from site.
4.Install topsoil, compost or soil amendments as indicated in the plans and in accordance with Sections 8-02.3(4) and 8-02.3(6) .
5.Till amendments to a depth of 12 inches or as indicated in the plans to provide a reasonably firm but friable planting area. Do not till any slopes steeper than 2(H) to 1(V).
6.Return soil to a uniform finished grade, 1 inch, or the specified depth of mulch plus 1 inch, below walks, curbs, junction and valve boxes, catch basins, and driveways, unless otherwise specified.
7.Begin planting and mulching the area within two days of final preparation.
8-02.3(6) Mulch and Amendments
The Contractor shall place soil amendments of the type, quality, and quantities specified where shown in the Plans or as specified in the Special Provisions. Areas receiving soil amendments shall be bare soil or vegetation free prior to application. All soil amendments shall be installed as shown in the Plans within 30 calendar days after delivery to the project site. Page 8-24 M 41-10
8-02 Roadside Restoration8-02.3(6)A Compost
Soil amendment shall be Fine Compost unless otherwise designated in the Plans. When compost blanket is used for temporary erosion control, the compost blanket may be incorporated into the soil immediately prior to planting when used as compost soil amendment. The area shall be prepared in accordance with Section 8-02.3(5) prior to placing compost.
8-02.3(6)B Fertilizers
The Contractor shall apply fertilizer in the form, mixture, and rate specified in the Special Provisions or as directed by the Engineer. Application procedures shall be in accordance with the manufacturer’s recommendations unless otherwise specified in the Special Provisions. The Contractor shall submit a guaranteed fertilizer analysis label for the selected product a minimum of one week prior to application for acceptance. Following the Engineer’s acceptance, fertilizing of the accepted ground or vegetated surfaces shall begin immediately. In seeding and lawn areas to be fertilized, the fertilizer shall be applied concurrently with the seed. When fertilizer is hydraulically applied, the fertilizer shall be suitable for application with seeding as specified in Section 8-02.3(9)C . If hydroseeding, the fertilizer shall be placed in the hydroseeder tank no more than 1 hour prior to application. Fertilizers for planting areas shall be applied concurrently with compost and applied prior to incorporation, unless tablet form fertilizer is specified. Where tablet form fertilizer is specified, fertilizer shall be applied concurrently with plant installation. Fertilizer sprayed on signs or sign structures shall be removed the same day. Areas not accessible by fertilizing equipment shall be fertilized by allowed hand methods. Second Application: A second application of fertilizer shall be applied as specified in the Special Provisions at the locations designated in the Plans. The fertilizer shall be applied during the months of March, April, or May of the following year after the initial seeding, planting, or lawn installation. The fertilizer shall be dry granular pellets or pearls and applied in accordance with the manufacturer’s recommendations or as specified in the Special Provisions.
8-02.3(7) Layout of Planting, Lawn and Seeding Areas
The Contractor shall lay out and prepare planting and lawn areas and receive the Engineer’s acceptance of layout and preparation prior to any installation activities. The Contractor shall stake the location of all trees larger than 1-inch caliper and the perimeter of all planting areas for acceptance by the Engineer prior to any installation activities. The Contractor shall locate all trees to be planted in mowable grass areas a minimum of 10 feet from the edge of planting areas, other trees, fence lines, and bottom of ditches unless otherwise specified. Tree locations shown in the Plans shall be considered approximate unless shown with stationing and offset distance. In irrigated areas, trees shall be located so their trunk is a minimum of ⅓ of the spray radius away from the nearest sprinkler head. Unless otherwise shown, planting areas located adjacent to Roadways shall begin 6 feet from the edge of shoulder on roadway fills and begin 5 feet up on the back slope from the bottom on roadway cut sections. Plants within planting areas shall be located such that mature branching pattern will not block sight distance, signs, or other traffic-related devices. No trees shall be placed where the mature canopy will grow to within 10 feet of existing power lines. Where roadside ditches are present, planting areas shall begin 5 feet from the centerline of the ditch unless shown otherwise in the Plans. M 41-10 Page 8-25 Roadside Restoration 8-028-02.3(8) Planting
8-02.3(8)A Dates and Conditions for Planting
The Contracting Agency will make an inspection of plant material at the source when requested by the Engineer. However, such preliminary approval shall not be considered as final acceptance for payment. Final inspection and approval (or rejection) will only occur when the plant material has been delivered to the Contract site. The Contractor shall notify the Engineer, not less than 48 hours in advance, of plant material delivery to the project. No plant material shall be planted until it has been inspected and accepted for planting by the Engineer. Rejected material shall be removed from the project site immediately. All plants for the project or a sufficient quantity to plant one acre of the site, whichever is less, shall be received on site prior to the Engineer beginning inspection of the plants. Plants delivered as a single unit of 25 or less of the same size, species, and variety, shall be clearly marked and tagged. Plants delivered in large quantities of more than 25 must be segregated as to variety, grade, and size; and one plant in each 25, or fraction thereof, of each variety, grade, and size shall be tagged. Within 30 calendar days of Execution of Contract, the Contractor shall provide written evidence to the Engineer that plant materials have been contracted or procured. No substitution of plant material, species or variety, will be permitted unless evidence is submitted in writing to the Engineer that a specified plant cannot be obtained and has been unobtainable since the Award of the Contract. If substitution is permitted, it can be made only with written approval by the Engineer. The nearest variety, size, and grade, as approved by the Engineer, shall then be furnished. Container or balled and burlapped plant material may be substituted for bare root plant material. Container grown plant material may be substituted for balled and burlapped plant materials. When substitution is allowed, use current ASNS standards to determine the correct rootball volume (container or balled and burlapped) of the substituted material that corresponds to that of the specified material. These substitutions shall be approved by the Engineer and be at no cost to the Contracting Agency. Plants stored under temporary conditions prior to installation shall be the responsibility of the Contractor. Plants stored on the project shall be protected at all times from extreme weather conditions by insulating the roots, root balls, or containers with sawdust, soil, compost, bark or wood chips, or other approved material and shall be kept moist at all times prior to planting. Cuttings shall continually be shaded and protected from wind. Cuttings shall be protected from drying at all times and shall be heeled into moist soil or other insulating material or placed in water if not installed within 8 hours of cutting. Cuttings to be stored for later installation shall be bundled, laid horizontally, and completely buried under 6 inches of water, moist soil or placed in cold storage at a temperature of 34°F and 90 percent humidity. Cuttings that are not planted within 24 hours of cutting shall be soaked in water for 24 hours prior to planting. Cuttings taken when the temperature is higher than 50°F shall not be stored for later use. Cuttings that already have developed roots shall not be used. Under no circumstances will planting be permitted during unsuitable soil or weather conditions as determined by the Engineer. Unsuitable conditions may include frozen soil, freezing weather, saturated soil, standing water, drought, high winds, heavy rains, and high water levels. All planting shall be accomplished during the following periods: Page 8-26 M 41-10
8-02 Roadside Restoration1. Non-Irrigated Plant Material
Western Washington (West of the Cascade Mountain Crest)Eastern Washington (East of the Cascade Mountain Crest) October 1 through March 1 October 1 through November 15
2.Irrigated Plant Material In irrigated areas, plant material shall not be installed until the irrigation system is fully operational and accepted by the Engineer. Trees and shrubs may be planted in irrigated areas during the non-irrigated planting window before the irrigation system is functional with the written concurrence of the Engineer only if the irrigation system is guaranteed to be operational prior to the end of the non-irrigated planting window.
8-02.3(8)B Plant Installation
The Contractor shall handle plant material in the following manner:
1.Root systems shall be kept covered and damp at all times. Plant material shall be kept in containers until the time of planting.
2.Roots shall not be bunched, curled, twisted, or unreasonably bent when placed in the planting hole. Bare root plant material shall be dormant at the time of harvesting and planting. The root systems of all bare root plant material shall be dipped in a slurry immediately prior to planting.
3.Plant material supplied in wrapped balls shall not be removed from the wrapping until the time of planting at the planting location. The root system of balled plant material shall be moist at the time of planting. Root balls shall be loosened prior to planting. All burlap, baskets, string, wire and other such materials shall be removed from the hole when planting balled plants.
4.Plant cutting material shall be dormant at the time of cutting and planting. All cuttings shall be installed immediately if buds begin to swell.
5.Plants shall be placed with the crown at the finished grade. In their final position, plants shall have their top true root (not adventitious root) no more than 1 inch below the soil surface, no matter where that root was located in the original root ball or container. The backfill material, including container and root ball soil, shall be thoroughly watered on the same day that planting occurs regardless of season. When installing plants, the Contractor shall dig planting holes three times the diameter of the container or root ball size. Any glazed surface of the planting hole shall be roughened prior to planting.
8-02.3(8)C Pruning, Staking, Guying, and Wrapping
Plants shall be pruned at the time of planting only to remove minor broken or damaged twigs, branches or roots. Pruning shall be performed with a sharp tool and shall be done in such a manner as to retain or to encourage natural growth characteristics of the plants. All other pruning shall be performed only after the plants have been in the ground at least 1 year and when plants are dormant. Trees shall only be staked when so noted in the Plans. Each tree shall be staked or guyed before completion of the backfilling in accordance with the details shown in the Plans. Commercial plant ties may be used in lieu of hose and wire guying upon concurrence of the Engineer. Trees shall be wrapped when so noted in the Plans.
8-02.3(9) Seeding, Fertilizing, and Mulching
For all seed, the Contractor shall furnish the following documentation to the Engineer:
1.The state or provincial seed dealer license and endorsements. M 41-10 Page 8-27 Roadside Restoration 8-022. Copies of Washington State Department of Agriculture (WSDA) test results on each lot of seed. Test results shall be within six months prior to the date of application.
3.Within 30 calendar days of Execution of Contract, the Contractor shall provide written evidence to the Engineer that seed mix has been contracted or procured.
8-02.3(9)A Dates for Application of Seed
Unless otherwise allowed by the Engineer, the Contractor shall apply seed for permanent erosion control during the following periods: Western Washington1 (West of the Cascade Mountain Crest)Eastern Washington (East of the Cascade Mountain Crest) March 1 through May 15 September 1 through October 1October 1 through November 15 1Seeding may be allowed outside these dates when allowed by the Engineer. All roadway excavation and embankment ground surfaces that are completed to final grades shall be prepared and seeded during the first available seeding window. When environmental conditions are not conducive to satisfactory results, the Engineer may suspend the seeding Work until such time that the desired results are likely to be obtained. If seeding is suspended, temporary erosion control methods according to Section 8-01 shall be used to protect the bare soil until seeding conditions improve.
8-02.3(9)B Seeding and Fertilizing
The Contractor shall prepare the seeding area in accordance with Section 8-02.3(5)A and apply seed at the rate and mix specified in the Special Provisions. The Contractor shall notify the Engineer within 5 days in advance of any seeding operation and shall not begin the Work until areas prepared or designated for seeding have been accepted. Following the Engineer’s acceptance, seeding of the accepted ground surfaces shall begin immediately. Seeding shall not be done during windy weather or when the ground is frozen, or excessively wet. When seeding by hand, the seed shall be incorporated into the top ¼ inch of soil by hand raking or other method that is allowed by the Engineer. Seed applied as a separate operation using a hydroseeder shall have a tracer added to visibly aid uniform application. The tracer shall be HECP Short-Term Mulch applied at a rate of 200 to 250 pounds per acre and the tracer shall carry the measured specified seeding rate.
8-02.3(9)C Seeding with Fertilizers and Mulches
When the Proposal includes any variation of seeding, fertilizing, and mulching, the seed and fertilizer shall be applied in one application followed by mulching. West of the Cascade Mountains, seed, fertilizer, and mulch may be completely applied in one application. East of the Cascades, seeding, fertilizing, and mulching shall not be applied as a single application unless allowed by the Engineer in writing prior to application. The fertilizing and mulching shall meet the requirements of Sections 8-02.3(6) and 8-02.3(11) .
8-02.3(9)D Inspection
Seeded areas will be inspected upon completion of seeding, fertilizing, and mulching. The Work in any area will not be measured for payment until a uniform distribution of the materials is accomplished at the specified rate. Areas that have not received a uniform application of seed, fertilizer, and mulch at the specified rate, as determined by the Engineer, shall be re-seeded, re-fertilized, or re-mulched prior to payment for seeding within a designated area. Page 8-28 M 41-10
8-02 Roadside Restoration8-02.3(9)E Protection and Care of Seeded Areas
The Contractor shall install and establish a stable and weed free stand of grass as specified within all designated permanent seeding areas. A stable stand of grass shall meet the following requirements:
1.A dense and uniform canopy cover, 70 percent for Western Washington and 50 percent for Eastern Washington, of specified species covers all seeded areas after 3 months of active growth following germination during the growing season. Canopy cover is defined as the cover of living and vigorous grass blades, leaves, and shoots of specified species. Volunteer species, weeds, woody plants, or other undesirable vegetation shall not factor into the canopy cover. Growth and establishment may require supplemental irrigation to meet cover requirements.
2.Stand health is evident by vigorously growing planted species having a uniform rich-green appearance and with no dead patches or major gaps of growth. A stand of grass that displays rusting, wilting, stunted growth, disease, yellowing or browning of leaves, or bare patches does not meet the stand health requirement.
3.The Contractor shall establish a stable stand of grass free of all weeds, non-specified grasses, and other undesirable vegetation. Weed control shall be in accordance with the Weed and Pest Control Plan and occur on a monthly basis during the establishment period and through the life of the Contract.
4.Remove all trash, rocks, construction debris, and other obstructions that may be detrimental to the continued establishment of future seeding. In addition to the requirements of Section 1-07.13 , restoration of eroded areas including clean up, removal, and proper disposal of eroded material, filling and raking of eroded areas with Topsoil Type A or fine compost, and re-application of the specified seed, fertilizer, and mulch shall occur at no additional cost to the Contracting Agency.
8-02.3(10) Lawn Installation
8-02.3(10)A Dates and Conditions for Lawn Installation
In irrigated areas, lawn installation shall not begin until the irrigation system is fully operational. Unless otherwise allowed by the Engineer, seeded lawn installation shall be performed during the following time periods at the location shown: Western Washington (West of the Cascade Mountain Crest)Eastern Washington (East of the Cascade Mountain Crest) March 1 through May 15 September 1 through October 1October 1 through November 15 When irrigation system is operational March 1 through October 1When irrigation system is operational March 1 through November 1
8-02.3(10)B Lawn Seeding and Sodding
The Contractor shall prepare the lawn area in accordance with Section 8-02.3(5) and apply seed at the mix and rate of application as specified in the Special Provisions. The Contractor shall have the option of sodding in lieu of seeding for lawn installation at no additional expense to the Contracting Agency. The available grass mixtures on the current market shall be submitted to the Engineer for selection and acceptance. Seeding in lieu of sodding will not be allowed. Seed placed by hand shall be raked into the soil. Following raking, the seeded soil shall be rolled with a smooth 50-pound roller. Sod strips shall be placed within 48 hours of being cut. Placement shall be without voids and have the end joints staggered. Following placement, the sod shall be rolled with a smooth roller to establish contact with the soil. M 41-10 Page 8-29 Roadside Restoration 8-02Barriers shall be erected, with warning signs where necessary, to preclude pedestrian traffic access to the newly placed lawn during the establishment period.
8-02.3(10)C Lawn Establishment
Lawn establishment shall consist of caring for all new lawn areas within the limits of the project. The lawn establishment period shall begin immediately after the lawn seeding or sodding has been accepted by the Engineer and shall extend to the end of four mowings or 20 working days whichever is longer. The mowings shall be done in accordance with During the lawn establishment period, the Contractor shall ensure the continuing healthy growth of the turf. This care shall include keeping the project in a presentable condition including, but not limited to, removal of litter, mowing, trimming, removal of grass clippings, edging, fertilization, insecticide and fungicide applications, weed control, watering, repairing the irrigation system, and repair and reseeding all damaged areas. Temporary barriers shall be removed only when directed by the Engineer. All Work performed under lawn establishment shall comply with established turf management practices. Acceptance of lawn planting as specified will be based on a uniform stand of grass and a uniform grade at the time of final inspection. The Contractor shall recultivate, re-grade, reseed, and refertilize areas that are bare or have a poor stand of grass or not having a uniform grade through any cause before final inspection at no additional cost to the Contracting Agency.
8-02.3(10)D Lawn Mowing
Lawn mowing shall begin immediately after the lawn establishment period has been accepted by the Engineer and shall extend to the end of the Contract or the first-year plant establishment, whichever is last. The Contractor shall accomplish the following minimum requirements:
1.Mow, trim, and edge as often as conditions dictate, at a minimum, once per week between April and September. Maximum height of lawn shall not exceed 3 inches. The cutting height shall be 2 inches. Cuttings, trimmings, and edgings shall be disposed of off the project site. When the Engineer allows the use of a mulching mower, trimmings may be left in place.
2.Water as often as conditions dictate depending on weather and soil conditions.
3.Provide fertilizer, weed control, water, and other measures as necessary to establish and maintain a healthy stand of grass.
8-02.3(11) Mulch
Mulches associated with seeding and planting shall be of the type specified in the Special Provisions or as indicated in the Plans. The Contractor shall evenly apply mulch at the rates indicated in the Plans. Mulches shall not be placed below the anticipated water level of ditch slopes, pond bank slopes, and stream banks, or in areas of standing or flowing water.
8-02.3(11)A Mulch for Seeding Areas
The Contractor shall furnish and evenly apply Hydraulically Applied Erosion Control Product (HECP) Long Term Mulch at the rates indicated and in accordance with the Manufacturer’s specifications unless otherwise specified. Page 8-30 M 41-10
8-02 Roadside RestorationHECP Long Term Mulch shall be hydraulically applied at the rate of 3500 pounds per acre
with no more than 2000 pounds applied in any single lift. HECP mulch shall not be used within the Ordinary High Water Mark. Mulch sprayed on signs or sign Structures shall be removed the same day. Areas not accessible by mulching equipment shall be mulched by accepted hand methods. HECP Long Term Mulch may be applied with seed and fertilizer west of the summit of the Cascade Range. East of the summit of the Cascade Range, seed and fertilizer shall be applied in a single application followed by the application of mulch.
8-02.3(11)B Bark or Woodchip Mulch
The Contractor shall apply bark or wood chip mulch of the type and depth specified where shown in the Plans or as specified in the Special Provisions. The Contractor shall complete final grading and placement/incorporation of soil amendments within the planting area prior to placement of mulch. Areas receiving bark mulch shall be bare soil or vegetation free before application, except where trees and other plants are specifically identified in the Plans or designated by the Engineer to be saved and protected. Bark or wood chip mulch shall be placed to a uniform non-compacted depth of 3 inches over all planting areas unless otherwise specified. Mulch shall be feathered to the base of the plant and 1 inch below the top of junction and valve boxes, curbs, and pavement edges. Any contamination of the mulch due to the Contractor’s operations shall be corrected to its former condition at no additional cost to the Contracting Agency. Mulch placed to a thickness greater than specified shall be at no additional cost to the Contracting Agency. The Contractor shall keep plant material crowns, runners, and branches free of mulch at all times.
8-02.3(11)C Bark or Woodchip Mulch Rings
The Contractor shall apply mulch rings around plants installed within existing vegetation areas or within seeded areas as shown in the Plans. Bark or wood chip mulch rings shall be applied to the surface of vegetation free amended soil in the isolated plant locations where shown in the Plans or as specified in the Special Provisions. Bark or wood chip mulch shall be placed to a uniform non-compacted depth of 3 inches to a radius of 2 feet around all plants within interplanted plant locations.
8-02.3(12) Inspection and Completion of Initial Planting
Upon completion of the initial planting within a designated area, the Engineer will make an inspection of all planting areas. The Contractor shall be present at the inspection of planting areas. The Engineer will notify the Contractor, in writing, of any replacements or corrective action necessary to meet the plant installation requirements. The Contractor shall replace all materials rejected or missing and correct unsatisfactory conditions. Completion of the initial planting within a designated area includes the following conditions:
1.100 percent of each of the plant material categories are installed as shown in the Plans.
2.Planting Area is cleaned up.
3.Repairs are completed, including but not limited to, full operation of the irrigation system.
4.Mulch coverage is complete.
5.All weeds are controlled. M 41-10 Page 8-31 Roadside Restoration 8-028-02.3(13) Plant Establishment Plant establishment consists of caring for all plants and planting areas within the project limits. The provisions of Sections 1-07.13(2) and 1-07.13(3) do not apply to this section. When the Proposal includes the bid item PSIPE____ (Plant Selection Including Plant Establishment), that bid item includes one year of plant establishment Work. The first year of plant establishment shall begin immediately upon written notification from the Engineer of the completion of initial planting for the project. The first-year plant establishment period shall be a minimum 12 month period. The first-year plant establishment shall be extended an amount equal to any periods where the Contractor does not comply with the plant establishment requirements and plan. During the first-year plant establishment period, the Contractor shall perform all Work necessary to ensure the resumption and continued growth of the transplanted material. This Work shall include, but is not limited to, applying water, removing foreign, dead, or rejected plant material, maintaining all planting areas in a weed-free condition, and replacing all unsatisfactory plant material planted under the Contract. If plants are stolen or damaged by the acts of others, the Contracting Agency will pay invoice cost only for the replacement plants with no mark-up and the Contractor will be responsible for the labor to install the replacement plants. Other weed control within the project limits but outside of planting, lawn, or seeding areas shall be as specified in Section 8-02.3(3) . During the first year of plant establishment, the Contractor shall meet monthly or at an agreed upon schedule with the Engineer for the purpose of joint inspection of the planting material. The Contractor shall correct all unsatisfactory conditions identified by the Engineer within a 10-day period immediately following the inspection. If plant replacement is required, the Contractor shall, within the 10 day period, submit a plan and schedule for the plant procurement and replacement to occur during the planting period as designated in Section 8-02.3(8) . At the end of the plant establishment period, plants that do not show normal growth shall be replaced and all staking and guying that remain on the project shall be removed unless otherwise allowed by the Engineer. All automatic irrigation systems shall be operated fully automatic during the plant establishment period and until final acceptance of the Contract. Payment for water used to water in plants, or hand watering of plant material or lawn areas unless otherwise specified, is the responsibility of the Contractor during the first-year plant establishment period. Subsequent year plant establishment periods shall begin immediately at the completion of the preceding year’s plant establishment period. Each subsequent plant establishment period shall be one full calendar year in duration. During the plant establishment period(s) after the first-year plant establishment, the Work necessary for the continued healthy and vigorous growth of all plants material shall be performed as directed by the Engineer. Payment for water used to water plants during the subsequent year(s) of plant establishment will be paid under the plant establishment item.
8-02.3(14) Plant Replacement
The Contractor shall be responsible for growing or arrange to provide sufficient plants for replacement of all plant material rejected through first-year plant establishment. All replacement plant material shall be inspected and accepted by the Engineer prior to installation. All rejected plant material shall be replaced with acceptable plants meeting the specifications and installed according to the requirements of this section at dates allowed by the Engineer. All replacement plants shall be of the same species as the plants they replace and meet the requirements of Section 9-14.8 unless otherwise allowed by the Engineer. Plants Page 8-32 M 41-10
8-02 Roadside Restorationmay vary in size reflecting one full season of growth should the Contractor elect to hold
plant material under nursery conditions for an additional year to serve as replacement plants. Replacement plant material larger than specified in the Plans shall meet the applicable section requirements of the ASNS for container class, ball size, spread, and branching characteristics.
8-02.3(15) Bioengineering
Bioengineering consists of using plant materials for the purpose of streambank or earthen slope construction and surface stabilization. This Work may include installing woody plant cuttings in various forms as well as part of streambank or earthen slope construction.
8-02.3(15)A Live Fascines
Live fascines shall be constructed of live and dead cuttings bundled together with a diameter of 8 to 18 inches. Live cuttings shall be the species shown in the Plans. Dead branches may be cuttings from any woody, non-invasive plant native to the project area. Dead branches may be placed within the live fascine and on the side exposed to the air. Live branches shall be placed in contact with the soil along their entire length. Each live fascine must contain a minimum of eight live branches. Dead branches shall constitute no more than 40 percent of the total fascine content. The total length of each live fascine shall be a minimum of 5 feet. Branches shall be bundled into log-like forms and bound with biodegradable twine spaced at 1 foot intervals along the entire length of the live fascine. Live fascines shall be installed horizontally in a trench whose depth shall be ½ the diameter of the live fascine. Secure the live fascine with live stakes 3 feet in length and ¾ inch in diameter placed at 18 inch intervals. A minimum of 3 live stakes shall be used per fascine. The live stakes shall be driven through the live fascine vertically into the slope. The ends of live fascines shall be woven together so that no gap remains between the two sections of the live fascine. Prior to being covered with soil, the fascine shall be thoroughly watered. Once the fascine is covered with 6 inches of soil, the soil covering the fascine shall be thoroughly watered. When used to remedy erosion areas, live fascines shall extend a minimum of 2 feet beyond the visible area of erosion and soil disturbance. The locations for live fascines and live stake rows shall be identified in the field for review and acceptance by the Engineer. The Engineer may require adjustment of fascine locations prior to installation in order to best accomplish the intended functions. Plant replacement during plant establishment for “PSIPE Live Fascine” will be required for any section void of live shoots for a length of 3 feet or more. Replacement shall consist of installing live stakes, spaced 1 foot apart above the fascine within the area void of live shoots. Live stakes shall be of the same species as the live fascine and shall have a minimum length of 3 feet and a minimum diameter of ¾ inch. The requirements of
8-02.3(15)B Brush Mattress
Live brush mattress shall be constructed of live branch cuttings, live poles, jute rope and topsoil. The live cuttings and live poles shall be from the plant species designated in the Plans. Live branch cuttings shall be placed with the cut ends oriented down slope as shown in the Plans. Cuttings shall overlap from side to side and from top to bottom as each layer is constructed. The live branches in each succeeding upper layer shall overlap the adjacent lower layer by a minimum of 6 inches. A maximum of 20 percent of the branches may be dead branches, but the live branches shall be distributed evenly to provide even rooting and growth over the entire area of the brush mattress. The Contractor shall anchor the live brush mattress to the slope using stakes and jute rope as shown in the Plans. Initially, the stakes shall be installed to protrude above the live brush mattress. The Contractor shall attach the jute rope to the stakes and tighten M 41-10 Page 8-33 Roadside Restoration 8-02the rope by tamping the stakes further into the bank, pulling the live brush mattress tight against the soil surface. The Contractor shall cover the live brush mattress with sufficient stockpiled topsoil to ensure good soil contact with the live plant material. Plant replacement during plant establishment for “PSIPE Live Brush Mattress” will be required for any section void of live shoots for an area of 25 square feet or more. Replacement shall consist of installing live stakes, spaced 3 feet apart in a triangular pattern within the area void of live shoots. Live stakes shall be of the same species as the live brush mattress and shall have a minimum length of 3 feet and a minimum diameter of ¾ inch. The requirements of Section 8-02.3(8) apply to PSIPE Brush Mattress.
8-02.3(15)C Brush Layer
Brush layers shall be constructed of live branch cuttings, randomly mixed, from the plant species listed under the brush layer heading in the Plans. The number of branches required will vary depending on the average branch diameter and layer thickness. Brush layers shall be placed in a trench dug at a 45-degree incline into the slope or stream bank. Two-thirds to three-fourths of the length of the live branches shall be buried. Soil shall be firmly tamped in place. Succeeding layers shall be spaced as detailed in the Plans. Brush layer placed in stream banks shall be angled downstream. Brush layers may include plant establishment when designated as PSIPE Brush Layer. Plant replacement for PSIPE Brush Layer will be required for each section void of live shoots for a continuous distance of 3 feet or more. The requirements of Section 8-02.3(8) apply to PSIPE Brush Layer.
8-02.3(16) Roadside Maintenance Under Construction
When the Contract includes the item, Roadside Maintenance Under Construction, this Work includes roadside mowing and ditch maintenance, and noxious weed control outside of planting areas according to Section 8-02.3(3) .
8-02.3(16)A Roadside Mowing
The Contractor shall mow designated roadside grass areas to the limits designated by the Engineer. Roadside mowing is limited to slopes not steeper than 3(H) to 1(V). The Contractor shall mow according to the following requirements:
1.Trim around traffic equipment, structures, planting areas, or other features extending above ground preceding or simultaneously with each mowing.
2.Maintain grass between 4 and 12 inches in height.
3.Operate mowing equipment with suitable guards to prevent throwing rocks or debris onto the traveled way or off of the Contracting Agency property. Power driven equipment shall not cause ruts, deformation, and compaction of the vegetated soil.
4.Removing clippings is required on the traveled way, shoulders, walkways, or Structures.
5.Restore soil rutting to a smooth and even grade at the direction of the Engineer.
8-02.3(16)B Ditch Maintenance
The Contractor shall maintain drainage for the duration of the Contract according to the following requirements:
1.Maintain flow lines in drainage channels and roadside ditches.
2.Cutting or trimming vegetation within drainage channels to maintain positive flow.
3.Remove dirt and debris from inside of culverts or any drainage area where runoff has allowed accumulations and re-seed for erosion control.
4.Restore channels to previous operational condition. Page 8-34 M 41-10
8-02 Roadside Restoration8-02.4 Measurement
Topsoil, bark or woodchip mulch and soil amendments will be measured by the acre or the square yard along the grade and slope of the area covered immediately after placement. Bark or woodchip mulch rings will be measured per each. Compost will be measured by the acre or the square yard along the grade and slope of the area covered immediately after application. Seeding, fertilizing, and mulching will be measured by the acre or the square yard by ground slope measurement or through the use of design data. Seeding and fertilizing by hand will be measured by the square yard. No adjustment in area size will be made for the vegetation free zone around each plant. Seeded lawn, sod installation, and lawn mowing will be measured along the ground slope and computed in square yards of actual lawn completed, established, and accepted. Plant selection will be measured per each. PSIPE __ (Plant Selection Including Plant Establishment) will be measured per each. Live pole will be measured per each. Live stake row will be measured by the linear foot along the ground slope line. The pay quantities for plant materials will be determined by count of the number of satisfactory plants in each category accepted by the Engineer. Fascine and PSIPE live fascine will be measured by the linear foot along the ground slope line. Brush mattress and PSIPE live brush mattress will be measured by the surface square yard along the ground slope line. Brush layer and PSIPE brush layer will be measured by the linear foot along the ground slope line. Water will be measured in accordance with Section 2-07.4 . Measurement will be made of only that water hauled in tank trucks or similar equipment.
8-02.5 Payment
Payment will be made for each of the following listed Bid items that are included in the Proposal: “Project Area Weed and Pest Control” will be paid in accordance with Section 1-09.6 . For the purpose of providing a common Proposal for all Bidders, the Contracting Agency entered an amount for “Project Area Weed and Pest Control” in the Proposal to become a part of the total Bid by the Contractor. Payment under this item will be made only when the Work is not already covered by other items. “Topsoil Type ____”, per acre or per square yard. The unit Contract price for “Topsoil Type ____” shall be full payment for all costs including weed control pre-treatment of topsoil areas, excavation, and stockpiling for the specified Work. “Fine Compost ”, per acre or per square yard. “Medium Compost”, per acre or per square yard. “Coarse Compost”, per acre or per square yard. The unit Contract price for “Fine Compost”, “Medium Compost” or “Coarse Compost” shall be full pay for furnishing and spreading the compost onto the existing soil. M 41-10 Page 8-35 Roadside Restoration 8-02“Soil Amendment”, per acre or per square yard. The unit Contract price for “Soil Amendment” shall be full pay for furnishing and incorporating the soil amendment into the existing soil. “Plant Selection ___”, per each. The unit Contract price for “Plant Selection ___”, per each shall be full pay for all Work to perform the work as specified within the planting area prior to planting for weed control, planting area preparation and installation of plants with initial watering. As the plants that do not include plant establishment are obtained, propagated, and grown, partial payments will be made as follows: Payment of 15 percent of the unit Contract price per each when the plant materials have been contracted, propagated, and are growing under nursery conditions. The Contractor shall provide the Engineer with certification that the plant material has been procured or contracted for delivery to the project for planting within the time limits of the project. The certification shall state the location, quantity, and size of all material. Payment will be increased to 100 percent of the unit Contract price per each for contracted plant material at the completion of the initial planting. All partial payments shall be limited to the actual number of healthy vigorous plants that meet the stage requirements, limited to plan quantity. Previous partial payments made for materials rejected or missing will be deducted from future payments due the Contractor. “PSIPE ___”, per each. The unit Contract price for “PSIPE ___”, per each, shall be full pay for all Work to perform as specified within the planting area for weed control and planting area preparation, planting, staking, cleanup, and water necessary to complete planting operations as specified to the end of first year plant establishment. As the plants that include plant establishment are obtained, propagated, and grown, partial payments will be made as follows after inspection by the Engineer: Payment of 5 percent of the unit Contract price, per each, when the plant materials have been contracted, propagated, and are growing under nursery conditions. The Contractor shall provide the Engineer with certification that the plant material has been procured or contracted for delivery to the project for planting within the time limits of the project. The certification shall state the location, quantity, and size of all material. Payment will be increased to 15 percent of the unit Contract price, per each, upon completion of the initial weed control and planting area preparation Work. Payment will be increased to 60 percent of the unit Contract price per each for the contracted plant material in a designated unit area when planted. Payment will be increased to 70 percent of the unit Contract price per each for contracted plant material at the completion of the initial planting. Payment will be increased to the appropriate percentage upon reaching the following plant establishment milestones: June 30th 80 percent September 30th 90 percent Completion of first-year plant establishment or after 100 percent all replacement plants have been installed, whichever is later Plant establishment milestones are achieved when planting areas meet conditions described in Section 8-02.3(13) . Page 8-36 M 41-10
8-02 Roadside Restoration“Seeding, Fertilizing and Mulching”, per acre or per square yard.
“Seeding and Fertilizing”, per acre or per square yard. “Seeding and Fertilizing by Hand”, per square yard. “Second Application of Fertilizer”, per acre. “Seeding and Mulching”, per acre. “Seeded Lawn Installation”, per square yard. “Sod Installation”, per square yard. “Lawn Mowing”, per square yard. The unit Contract price per square yard for “Seeded Lawn Installation” or “Sod Installation” shall be full pay for all costs necessary to prepare the area, plant or sod the lawn, erect barriers, control weeds, and establish lawn areas and for furnishing all labor, tools, equipment, and materials necessary to complete the Work as specified and shall be paid in the following sequence for healthy, vigorous lawn: Completion of Lawn Planting 60 percent of individual areas Mid Lawn Establishment 85 percent of individual areas (after 2 mowings) Completion of Lawn Establishment 100 percent of individual areas (after 4 mowings) “Plant Establishment Year ____” will be paid in accordance with Section 1-09.6 . For the purpose of providing a common Proposal for all Bidders, the Contracting Agency entered an amount for “Plant Establishment - ___ Year” in the Proposal to become a part of the total Bid by the Contractor. “Live Pole”, per each. “Live Stake Row”, per linear foot. “Bark or Wood Chip Mulch”, per acre or per square yard. The unit Contract price for “Bark or Wood Chip Mulch” shall be full pay for furnishing and spreading the mulch onto the existing soil. “Bark or Wood Chip Mulch Rings”, per each. The unit Contract price “Bark or Wood Chip Mulch Rings” shall be full pay for furnishing and spreading the mulch onto the existing soil. “Fascine” and “PSIPE Live Fascine”, per linear foot. “Brush Mattress” and “PSIPE Live Brush Mattress”, per square yard. “Brush Layer” and “PSIPE Brush Layer”, per linear foot. When PSIPE is included with Fascine, Brush Mattress, or Brush Layer, the payment schedule for PSIPE ____ will apply. “Roadside Maintenance under Construction” will be paid in accordance with Section 1-09.6 . For the purpose of providing a common Proposal for all Bidders, the Contracting Agency has entered an amount for “Roadside Maintenance Under Construction” in the Proposal to become a part of the total Bid by the Contractor. “Water”, per M Gal.
Source: Washington Standard Specifications for Road, Bridge, and Municipal Construction, 2024 Edition. Pages 768–786 of 1,151.