01030.02 955 PART 01000 - RIGHT OF WAY DEVELOPMENT AND CONTROL Description
01030.00 Scope - This Work consists of seeding and associated tasks to develop plant growth for
erosion control, environmental mitigation, and Roadside development.
01030.02 Definitions :
Certified Seed - A grass or legume seed named variety that has been reviewed and accepted into the Oregon Certified Seed program. Currently Certified Seed is individually sold in bags with a blue- colored Oregon Certification Tag, thus the name commonly us ed for such seed is "blue tag stock". Establishment Period - A period when planting Work has been performed and initially accepted, and there is a Contract requirement to care for the planted areas in some way until the period ends. Native Plant (existin g) - A variety of plant species occurring in its natural habitat without direct or indirect human actions. Noxious Weed - All Weed designated by the Oregon State Weed Board as injurious to public health, agriculture, recreation, wildlife, or all public or private property. The Oregon Department of Agriculture (ODA) will be the authority in determination of N oxious Weed species. Pure Live Seed (PLS) - The amount of living seed in the total quantity of seed when non- viable seed or non- seed material is excl uded. Riparian - Related to the bank, shore, or water -influenced areas of a watercourse or water body. Sensitive Areas - Defined areas such as Wetland s, natural water and Riparian resources, special environmental zones, or where certain activities are re stricted such as the use of chemicals. Specified Weeds - All Noxious Weeds as defined above, and all plant species identified in the Special Provisions or on the Plans as a species to be removed. Waters of the State - See ORS 468B.005 for "Waters of the State" definition. Weed - A plant that is undesirable where it is growing. Weed Free - For these Specifications, " Weed Free" is defined as the following maximum amount of living weeds per square yard: • Zero "Type A" or "Type T" Noxious Weeds • One "Type B" Noxious Weed • One of each non- noxious weed listed in the Special Provisions The ODA Noxious Weed Policy and Classification System lists Type "A", "B", and "T" Noxious Weeds. Weed Management Area (WMA) - A defined project area with Specified Weeds to remove, including areas where weeds begin growing because of Project -associated ground disturbance. A WMA may be the entire Project Site or any portion, including material source and disposal sites as show n. 01030.11 956 Materials
01030.11 Topsoil - Furnish Topsoil meeting the requirements of 01040.14.
01030.12 Soil Conditioners, Amendments, and Bio -Amendments - Furnish Soil modifiers
meeting the requirements of 01040.15, 01040.16, and 01040.17.
01030.13 Seed - Furnish seed meeting the following requirements:
a.Label - Deliver all seed in standard, sealed containers. Label each container with the following: • The kind and variety of each seed of 3 percent or more in a mixture, by weight. Be sure that seed mix labels include the words "mixture" or "mixed seed" when the seed is a mixture • The country or state where the seed is grown • The lot number or other lot identification • The total percentage, by weight, of other crop seed • The total percentage, by weight, of weed seed • The total percentage, by weight, of inert matter • Statement of "No Noxious (weed) Found" • For each named seed: • Percentage of germination • Percentage of hard (non-living) seed, if more than 1 percent • Percent of PLS for each kind of seed • Percent and kind of other crop • Month and year of seed test • Net weight of contents • Name and address of seed labeler or seller • Origin for each seed (state or foreign country) • If seed inoculant is used, the claimed date that inoculant effect iveness ends • For treated seeds (if any): • Statement that the seeds have been treated • Name of all chemical used in the treatment • Description process used in the treatment • Warning statement for all residual chemicals used • Net weight of each container • For seed s listed as native, date and location of collection of source (first generation) seed • For native seeds specified to be collected for direct use on a Project, label containers with the date and location of collection sites for each seed species Alternate l abel requirements may be identified in the Special Provisions for certain Native Plant seeds.
b.Quality - Furnish seed meeting the following requirements: • The seed and labeling complies with Oregon Seed Law and Federal Seed Act . 01030.13 957 • The seed has been tested within 18 months of the planting date. • The seed is not sprouted, moldy, or showing evidence of having been wet or otherwise damaged. • The seed is labeled as "Oregon Certified Seed" or the equivalent from another state when identified in the Special Provisions. Information about C ertified Seed is available from County Extension Offices, Oregon State University, and the Oregon Department of Agriculture.
c.Pure Live Seed - Use the PLS specified rate listed in 01030.13(f) of the Special Provisions for determining PLS application rates. Ensure the PLS application rate meets the PLS specified rate. Apply pre-blended seed mixes, with multiple species, at a PLS application rate ensuring all species meet or exceed the PLS specified rate for each species in the seed mix. PLS application rate for an individual seed species is determined as follows: PLS specified rate is listed in 01030.13(f) of the Special Provisions PLS factor is obtained by multiplying the seed label germination percentage times the seed label purity percentage. Use the purity and germination percentages from the label on actual bags of seed to be used on the Project. PLS application rate is obtained by dividing the PLS specified rate by the PLS factor. For a seed mix, make this calculation for each seed species in the mix and then adjust as follows: Using the seed tag, determine the weight of each seed species in the bag and use this information to find the percentage, by weight, of each seed sp ecies is in 1 pound for the pre-blended mix. Divide the percentage by weight of each seed species, per pound, for the pre- blended mix, by the PLS application rate for that spec ific seed species. Determine the highest application rate in the seed mix and apply the seed mix at that application rate.
d.Inspection - Each lot of seed is subject to inspection upon delivery to the Project. Seed that is not labeled or that does not conform to the Specifications will be rejected and shall be replaced at no additional cost to the Agency.
e.Mixes - Furnish seed mixes that meet the labeling, quality and inspection requirements stated above. Submit all other proposed seed or seed m ixes for consideration and receive written approval before seeding Work begins. Replace rejected seed before planting.
f.Types of Seed Mixes - Seed mixes, quantities, standards, seeding rates, and other information will be includ ed in the Special Provisions for each type of seed mix. The following are the functional categories of seed mixes that may be included on projects (a category may have multiple functions on a Project Site ): • Temporary Seeding - To provide short -term control of Soil erosion until permanent seeding is performed or all potential for erosion is removed. • Permanent Seeding - The final seeding, or only seeding performed for erosion control. • Lawn Seeding - Seeding for areas where fi nished turf appearance is desired. 01030.14 958 • Wildflower Seeding - Seeding to develop growth of wildflowers. The seed mix will typically contain grass or other plant seed to provide erosion control. • Plant Seeding - Seeding which typically includes more than just grass species, such as seeds of woody or herbaceous plants. • Water Quality Seeding - For use in water quality facilities such as swales or settling basins. • Wetland Seeding - To vegetate existing or constructed Wetlands with N ative Plant species. • Native P lant Seeding - Seeding to restore native vegetation.
g.Availability - Provide a list of seed sources for all specified seeds within 60 Calendar Day s after execution of the Contract. Verify that all specified seed has been located and will be available for use on the Project. Submit the seed and seed mixes to be used on the project according to 00150.37.
01030.14 Fertilizer - Furnish standard, commercial grade fertilizer meeting the following
requirements:
a.General - Deliver fertilizers in separate or mixture containers that have the percentage of total nitrogen, available phosphoric acid, and water -soluble potash (NPK) in the amounts specified. Label each container with a quali ty compliance certificate that includes the container weight, the percentage of each ingredient, and the source of each component in the mixture. Ensure that each container is labeled with a quality compliance certificate that meets the applicable requirements of Section 00165. Furnish fertilizer according to State and federal regulations. Fertilizer is subject to testing by the State Department of Agriculture.
b.Type of Fertilizer - Provide the following fertilizer:
1.West of the Cascades - Furnish 22- 16-8 inorganic fertilizer analyzing 22 percent nitrogen, 16 percent phosphoric acid, 8 percent soluble potash, and including a minimum of 2 percent sulfur. Furnish fertilizer containing not less than 50 percent available water -insolu ble, controlled- release nitrogen derived from one of the following sources: • Urea formaldehyde (Nitroform) • Isobutylidene Diurea (IBDU) • Polymer coated urea (no sulfur)
2.East of the Cascades - Furnish 22- 10-5 inorganic fertilizer analyzing 22 percent nitrogen, 10 percent phosphoric acid, 5 percent soluble potash, and including a minimum of 10 percent sulfur. Furnish fertilizer containing not less than 50 percent available water -insoluble, controlled- release nitrogen derived from one of the three sources stated for West of the Cascades above.
3.Statewide, Near Water - For application within 50 feet of open water, furnish 22-2 -11 low-phosphorus fertilizer analyzing 22 percent nitrogen, 2 percent phosphorus, and 11 percent potassium which releases slowl y over an eight to nine month period. Furnish fertilizer containing a minimum of 60 percent available water -insoluble, controlled-release nitrogen derived from one of the three sources stated for west of the Cascades above. Furnish phosphorus and potassi um that is coated to allow a minimum of 95 percent controlled-release. 01030.17 959 01030.15 Mulch - Furnish mulch Material s free of all W eed or plant seeds and containing no substances detrimental to plant life. The kind of mulch materials ac ceptable for use will be shown, listed in the Special Provisions, or will be as approved. Furnish mulch meeting the following requirements:
a.Hydromulch from Cellulose, Wood, or Straw Fiber - Cellulose fiber produced from virgin wood, straw, or paper fiber product from the QPL. Furnish wood or straw mulch processed so the fibers remain uniformly suspended under agitation in water and the fibers have moisture- absorption and percolation properties. Ship hydromulch in packages of uniform weight, ± 5 percent, and labeled with the manufacturer's name and air -dry weight. Include enough green dye tracer so applied mulch is easily visible.
b.Straw - Straw mulch for non-hydroseeding applications from bentgrass, bluegrass, fescue or ryegrass singly or in c ombination. Cereal grain straw from barley, oat or wheat may be allowed upon approval of the Agency. Provide straw that is not moldy, caked, decayed or of otherwise low quality. Submit certification from the Supplier that the straw is free of Noxious Weed seeds or plant parts. Acceptable documentation is any one of the following: • The straw source is an "Oregon Certified Seed" field. • The straw is certified by a recognized program accepted by the Oregon Department of Agriculture as being Weed Free. • Seed lab test results of seed harvested from the straw meet minimum Oregon Certified Seed quality for weed seed content.
c.Compost - Commercially manufactured medium compost material meeting the requirements of Section 03020, unless otherwise approved.
01030.16 Tackifier - Furnish a commercial quality tackifier containing no agent toxic to plant life.
Furnish tackifier of either a liquid stabilizing emulsion or a dry powder tackifier meeting the following requirements:
a.Liquid Stabilizer Emulsion - Tackifier with a base material of liquid, polyvinyl acetate polymers, using emulsion resins and containing not less than 55 percent total solids by weight. Furnish tackifier containing no polyacrylates or polyvinyl acrylics. The emulsion shall, when diluted with water and upon drying, allow exchange of air and moisture to the seeds and have an effective life of 1 year or more.
b.Dry Powder Tackifier - Tackifier base consisting of one or more active hydrocolloids from natural plant sources, which hydrates in water and blends with other slurry materials, and upon application and drying tacks the slurry particles to the Soil surface, and exhibits no growth or germination inhibiting factors. Provide stabilizing emulsion in a dry powder form that may be re-emulsifiable, and consisting of a processed organic adhesive derivative of one of the following: • Gumbinder derived from guar (Cyamopsis tetragonoloba) • Gumbinder derived from plantain (Plantago insularis)
01030.17 Pesticides - Submit proposed pesticides and receive approval before using. Submit a
copy of the manufacturer's federal registered label and, if requested, a Material Safety Data Sheet. The Agency reserves the right to restrict chemicals from being used on Sensitive Areas. 01030.30 Labor
01030.30 Personnel Qualifications:
a.Weed Control Coordinator - Submit certification at the preconstruction conference that the weed control coordinator meets the following minimum requirements: • Demonstrates ability to identify noxious and other Weed species commonly seen in Oregon. Some examples of potentially acceptable credentials are at least 1 year conducting Weed surveys in Oregon or Washington State or a degree in botany or horticulture from an accredited institution. • Has successful weed control experience, with similar duties to those stated under typical duties below, on at least three construction or vegetation management projects. Two examples of acceptable certification are an Oregon Pesticide Consultant License or Oregon Landscape Contractor's License held in the individual's name. The weed control coordinator duties include: • Identify Specified Weeds. • Prepare and update the weed control work plan (WCWP). • Coordinate Contractor's Weed removal Work and records. • Resolve weed control issues as the Contractor's representative. • Determine when Specified Weed content exists in disposable materials and ensures the materials are disposed of at an approved off-site facility.
b.Pesticide Applicator - Submit certification before application of pesticide Work begins, that when chemical weed control is used, that each applicator possesses an Oregon Commercial Pesticide Applicator's License held in the individual's name. Submit a certification each time a new applicator begins application Work on the Project. Construction
01030.40 General - Notify the Agency not less than 24 hours in advance of seeding operations.
Notify the Agency of the acreage to be seeded at least 7 Days before seeding begins. Do not begin seeding until prepared slopes in an area have been approved for seeding. Do not perform seeding during windy weather or when the ground is frozen, excessively wet, or otherwise not tillable. Do not disturb or damage existing desirable vegetation to be left in place. Do not disturb areas previously seeded and mulched, with the exception of disturbances caused by stage construction. If previously seeded areas are disturbed, rework and reseed as directed, at no additional cost to the Agency. Remove all non-approved plants resulting from the seed mixes provided for the Project at no additional cost to the Agency, including erosion protection required during reseeding.
01030.41 Area Preparation - Refer to 01040.48 for area preparation for the following kinds of
seeding: • Temporary Seeding - Method E • Permanent Seeding - Method D • Wildflower Seeding - Method B • Plant Seeding - Method B 01030.42 • Water Quality Seeding - Method B • Wetland Seeding - Method B • Lawn Seeding - Method C • Native Plant Seeding - Method B
01030.42 Weed Control - When the Contract Schedule of Items includes an item for "weed control",
remove and prevent regrowth of Specified Weeds, Weed plant parts, and weed seeds from areas within the Project limits. Do not harm or disturb existing native or ornamental vegetation, unless directed to do so. Do not compact Soil with heavy Equipment in areas where Soil will not be disturbed for Roadway or other construction. If a pesticide has been approved for use, apply according to federal and State laws, including conditions and requirements of the federal registered pesticide label.
a.Weed Control Work Plan - Depending on Project conditions such as location, sensitive environments, permit requirements, jurisdictional regulations, or other items, there may be limits on the use of chemicals or other weed control methods. Before submitting the initial WCWP, determine if there are restrictions or all potential for restrictions on weed control methods on Project Sites. At the preconstruction conference, submit a WCWP with the following: • Name and contact information for the approved weed control coordinator. • WMA's with existing Specified Weeds mapped on Project Plan sheets where possible. • Botanical and common name of each species of Weed to be removed. • The proposed methods of Weed removal and continuing control for each Weed species listed. • Schedule of weed control measures. • Request to use wheeled or tracked construction Equipment in Sensitive Areas. If changes of the WCWP are necessary, resubmit a revised WCWP for approval before proceeding.
b.Weed Control Inspections - Inspect the Project for new growth of specified weeds at least monthly and apply weed control measures as appropriate. This requirement may be waived by the Engineer during the period that weeds are fully dormant. To ensure satisfactory Weed removal, the last WMA inspection will occur at least 30 Days after growing season has begun or as directed. At a minimum, schedule weed control inspection with the Agency at the following times: • After approval of WCWP and prior to beginning weed control within a WMA. • Monthly. • Upon request by the Agency to discuss non-compliant weed control Work. • After completing weed control at material sources and disposal sites.
c.Remove and Control of Weeds - Remove and control weeds according to the following:
1.All Areas: • At least 3 Calendar Days prior to beginning weed control activities, walk through each WMA with the Engineer and confirm the identity, location, type, and approximate number of Specified Weeds. Verify that control methods in the WCWP are acceptable as planned for each WMA before proceeding with weed control activities. 01030.43 • Remove Specified Weeds and receive approval prior to beginning construction or Equipment mobilization in that area. As much as practicable, ensure that weed seeds or reproducing plant parts such as vines, runners, or rhizomes do not remain or become disbursed during control activities. • As soon as practicable, place weeds and related materials in an approved container and transport to an approved offsite disposal facility according to applicable laws and regulations. During transport, ensure that materials are fully enclosed at all times to prevent escape. • Keep a record of all Weed material loads transported off the Project and submit documentation from the approved disposal facilities that a corresponding number of Weed material loads were disposed of at that facility. • Keep WMA's Weed Free including weeds not initially present in the walk through.
2.Sensitive Areas: • Unless otherwise approved in writing, use only hand or light mechanical weed control methods within 50 feet of Sensitive Areas. Hand methods include the use of hand tools. Light mechanical methods include the use of hand carried, motorized machinery. • Inside Sensitive Areas, obtain approval before using wheeled or tracked construction Equipment. Requests will be approved only when all vegetation in the area will be cleared, such as under new Roadways or slopes. • The Engineer will be the authority in the determination of Sensitive Areas.
d.Weed Control Corrective Work - If corrective work for areas identified as deficient by the Engineer is not completed within a 15 Calendar Day period, the Engineer may suspend the Work according to 00180.70. If the Contractor's weed control Work is determined to be unsatisfactory, the Agency reserves the right to do the Work at the Contractor's expense.
01030.43 Temporary and Permanent Seeding:
a.Temporary Seeding - Temporarily seed disturbed Soils and slopes that are not at finished grade and which will be exposed for 2 months or longer before being disturbed again. Provide fertilizer, mulch, water, and other amendments necessary to ensure establishment. Ensure that temporary seeding Work achieves the coverage of live plants required by 01030.60 by the end of the next permanent seeding date stated in 01030.43(b). If this coverage is not achieved, or if the Agency determines that it is not effective in stabilizing the Soil from erosion, stabilize the area with other temporary stabilization methods as described in 00280.42 at no additional cost to the Agency.
b.Permanent Seeding - Perform this seeding during the permanent seeding dates shown below. If Work performed within the seeding dates does not provide coverage according to 01030.60, re- seed according to 01030.48 and as directed. The dates for permanent, wildflower, plant, water quality, Wetland, lawn, and Native Plant seeding are as follows: • West of the Cascades - March 1 through May 15 and September 1 through October 31. If new lawn areas are regularly watered, they can be seeded from March 1 through November 15. • East of the Cascades - October 1 through February 1. If new lawn areas are regularly watered, they can be seeded from March 1 through October 31. • Wetland (Statewide) - September 1 through October 31 and March 1 through April 30. 01030.48 Permanent seeding outside of these dates requires written authorization from the Agency. Approval to seed outside these dates will only be given when physical completion of Project Work is imminent and environmental conditions are conducive to satisfactory growth. For permanent seeding done outside the seeding dates, ensure that the coverage of live plants required by 01030.60 is achieved no later than 3 weeks into the next permanent seeding period. If this coverage is not achieved, re-seed and re-fertilize areas of insufficient coverage according to the permanent seeding requirements, at no additional cost to the Agency.
c.Seed Application Rates - Determine the seeding application rate according to 01030.13(c). Apply seed mixes at the highest application rate calculated to provide not less than the specified application rate for each individual seed species in the mix.
01030.44 Fertilizer:
a.Inorganic - Apply 22-16-8 or 22-10-5 inorganic fertilizer at the rate of 400 pounds per acre.
b.Low-Phosphorous - Apply 22-2-11 polymer coated urea low-phosphorus fertilizer at the rate of 200 pounds per acre.
01030.45 Soil Testing - Test Soil according to 01040.13.
01030.46 Topsoil and Wetland Topsoil - Construct Topsoil areas according to 01040.43
and 01040.44, as appropriate.
01030.47 Soil Amendments and Bio-Amendments - Incorporate Soil amendments and
bio-amendments into the seeding operation according to 01040.45 and 01040.46, as appropriate.
01030.48 Application - The following application methods are acceptable for both temporary and
permanent seeding:
a.Hydroseeding, Fertilizing, Hydromulching, and Tacking - Apply seed, fertilizer, mulch, and tackifier as follows: Use hydraulic Equipment that continuously mixes and agitates the slurry and applies the mixture uniformly through a pressure-spray system providing a continuous, non-fluctuating delivery. Ensure the Equipment and application method provides a uniform distribution of the slurry. Place seed, fertilizer, mulch, and tackifier in the hydroseeder tank no more than 30 minutes prior to application.
1.Hydroseeding Operation - Perform hydroseeding according to the following:
a.One-Step Operation - Apply Materials in one step only for the following situations: • When seeding in conjunction with erosion control matting. Apply seed, fertilizer, and tracer before installing matting. • When treating small areas according to 01030.48(e). Double the amount of seed to compensate for seed suspended above Soil by the mulch.
b.Two-Step Operation - Except for the one-step method situations in 01030.48(a)(1)(a), use the two-step method for all hydroseeding operations:
1.Step 1 - Apply seed, fertilizer, and tracer. The seed and fertilizer may be applied separately or together. If hydromulch is used as a tracer, apply it at a rate of 500 pounds per acre. 01030.48
2.Step 2 - Apply mulch and tackifier. Hydromulch, if used as a tracer in Step 1, will be included as part of the specified hydromulch rate specified in 01030.48(a)(3).
2.Seed - Thoroughly mix seeds when more than one kind is to be used.
3.Mulch - Apply hydromulch at the following rates based on dry fiber weight:
a.Slopes Flatter Than 1V:2H - Apply cellulose fiber that includes a tackifier at a rate of 2,000 pounds per acre.
b.Slopes 1V:2H or Steeper - Apply cellulose fiber that includes a tackifier at a rate of 3,000 pounds per acre.
4.Tackifier for Cellulose Fiber Applications - Use one of the following:
a.Liquid Stabilizer Emulsion - Dilute the emulsion with water at a rate of one part emulsion to 30 parts water. Apply the diluted mixture at the rate of 865 gallons per acre unless the manufacturer recommends a greater rate of application.
b.Dry Powder Tackifier - Apply at the following rates unless the manufacturer recommends a greater rate of application:
1.Slopes Flatter Than 1V:2H - 60 pounds per acre mixed with hydromulch fibers at the rate specified.
2.Slopes of 1V:2H or Steeper - 100 pounds per acre mixed with hydromulch fibers at the rate specified.
b.Seeding, Fertilizing, Dry Mulching, and Tacking - Apply seed and fertilizer separately or together as the first step. Apply dry mulch as the second step. Tackify the mulch as the third step.
1.Seed and Fertilizer - Apply seed and fertilizer at the specified rates. When fertilizer and seed are to be applied in dry condition, except when compost material is used, apply them separately. When applied from separate compartments, the application may be done in one operation by one of the following methods:
a.Blower - Blower Equipment using air pressure and an adjustable spout that uniformly applies dry fertilizer and dry seed in separate and successive applications at constant measured rates.
b.Helicopter - Helicopter equipped with hoppers and adjustable disseminating mechanisms that separately and successively apply fertilizer and seed in uniform and prescribed quantities.
c.Mechanical Spreaders - Hand or machine operated mechanical spreaders that uniformly apply dry fertilizer and dry seed separately and successively in the prescribed quantities.
d.Hydroseeding - Uniformly apply at the rate specified. Add 500 pounds per acre of hydromulch fiber to the seed and fertilizer mixture to visibly aid uniform application at no additional cost to the Agency. 01030.48
2.Dry Mulch:
a.Straw Mulch - Evenly apply straw mulch within 24 hours after seeding and fertilizing. In areas not accessible to heavy Equipment or hose, apply straw mulch by hand or other approved method. Place straw mulch approximately 2 inches deep, in loose condition, which requires approximately 2 1/2 Tons per acre of dry mulch, depending on moisture content. Do not use straw mulch on Slopes of 1V:1.5H or steeper.
b.Compost Material Mulch - Evenly apply compost material mulch with a pneumatic blower or other Equipment that propels the material directly at the Soil surface and achieves direct contact with the Soil. Apply compost at a uniform depth of 2 inches. Apply at least 3 feet over the top of the slope or overlap the material into existing vegetation. When seed is required, apply it by one of the following methods:
1.Two-Step Pneumatic Application: • Step 1 - Apply compost to a uniform depth of 2 inches with a pneumatic blower or other Equipment that propels the material directly at the Soil surface and achieves direct contact with the Soil. • Step 2 - Uniformly mix seed with additional compost material and apply the combined seed and compost material over the first layer to a depth of 1/4 inch with a pneumatic blower or other similar methods.
2.Two-Step Pneumatic and Hydroseeding Application: • Step 1 - Apply compost to a uniform depth of 2 inches with a pneumatic blower or other Equipment that propels the material directly at the Soil surface and achieves direct contact with the Soil. • Step 2 - Hydroseed over the first layer according to 01030.48(a) except do not use fertilizer unless shown.
3.Tacking - Anchor straw mulch using one of the following methods:
a.Dry Powder Tackifier - Unless the manufacturer recommends a greater rate, apply dry powder tackifier at the rate of 80 pounds per acre mixed with 800 pounds per acre of hydromulch.
b.Mechanical Crimping - Mechanically incorporate the straw into the top 2 inches of the Soil forming a uniform surface cover effective at preventing erosion by one of the following:
1.Crimping Disc - A heavy disk with flat scalloped discs approximately 1/4 inch thick, having dull edges and spaced no more than 9 inches apart.
2.Sheep's-Foot Roller - Modified sheep's foot roller equipped with straight studs, made of approximately 3/4 inch steel plate, placed approximately 8 inches apart and staggered. Ensure that the studs are not less than 6 inches long or more than 6 inches wide, and are rounded to prevent withdrawing the straw from the Soil. Use a roller with enough weight to incorporate the straw sufficiently into the Soil providing a uniform surface cover. 01030.49
c.Drill Seeder - Apply seed and fertilizer with a grass seed drill that works fertilizer into the Soil and places seed under about a 1/4 inch Soil cover.
d.Seeding Over Mulched Areas - If an area has been previously mulched for erosion control or temporary seed and mulch is present on the Soil surface, double the amount of each seed type used. Apply seed and fertilizer hydraulically and add a green dye to the mixture to visibly aid uniform application. Upon approval, fertilizer and seed may only be applied after mulching if one of the following conditions apply: • Mulch is punched into the Soil by mechanized means. • It is necessary to hold down mulch with netting or like material. • The Slope is 1V:1.5H or steeper and a slurry mixture would tend to run down the slope. • Mulch is removed prior to seeding.
e.Optional Temporary or Permanent Seeding - Upon approval, the following may be used to stabilized disturbed areas that are 1,500 square feet or less and totaling no more than 0.5 acre:
1.Seed - Seed the disturbed area with the seed mix at the rate of 2 pounds per 1,000 square feet. Seed may be spread by mechanical spreader according to 01030.48(b)(1)(c).
2.Cover - Cover seeded areas with one of the following: • Straw mulch at a rate of 100 pounds per 1,000 square feet. Spread the mulch uniformly and apply commercial tackifier or netting to hold in place. • Bark mulch spread uniformly at an approximate depth of 1/2 inch. Use well-decomposed mulch for seed mulching. • Suitable open-weave, biodegradable erosion control matting installed according to manufacturer's instructions. • Hydromulch applied in one step according to 01030.48(a).
3.Fertilizer - Fertilize according to 01030.44.
01030.49 Work Quality:
a.Drift - Prevent drift and displacement of seed and fertilizer regardless of Equipment and methods used. Use protective covering on Structures and objects where coverage and stains would be objectionable and when tacking agents are used with mulch. Protect vehicles and people from drifting spray. If Equipment and methods of application result in wasting material, make corrections to prevent waste.
b.Displacement - Prevent seed, fertilizer, and mulch from falling or drifting onto areas occupied by Rock Base, Rock Shoulders, plant beds, or other areas where grass is detrimental. Remove material that falls on plants, Roadways, gravel Shoulders, Structures, and other surfaces where material is not specified.
c.Damage - Prevent damage to prepared areas and to completed fertilizer, seed, and mulch Work. Replace all material that becomes displaced before acceptance of the Work. 01030.62 Maintenance
01030.60 General - Ensure that each seeded area has a uniform, healthy and weed-free stand of
grass or other seeded plants growing at the end of the Establishment Period. The minimum living plant coverage standards for acceptance of seeding in a planted area are as follows: • Temporary Seeding: West of the Cascades - 70 percent coverage of ground surface. East of the Cascades - 30 percent coverage of ground surface. • Permanent Seeding: West of the Cascades - 90 percent coverage of ground surface. East of the Cascades - 30 percent coverage of ground surface. • Wildflower and Wetland Seeding - 70 percent coverage of ground surface. • Water Quality and Lawn Seeding - 100 percent of ground surface. • Woody or Other Plant Seeding - See Special Provisions for minimum living plant coverage. • Native Plant Seeding - See Special Provisions for minimum living plant coverage.
01030.61 Establishment Period - The seeding Establishment Period is as follows:
a.Erosion Control Seeding - For temporary and permanent seeding done solely for erosion control, the Establishment Period begins upon acceptance of the initial seeding Work and ends upon satisfactory plant growth and coverage of the seeded areas according to 01030.43 and 01030.60.
b.All Other Seeding - Establishment Periods for wildflower, plant, water quality, lawn, Wetland, Native Plant, and permanent seeding begins upon acceptance of the initial seeding Work and ends as follows: • The seeding Establishment Period will end 45 Days after the beginning of the Establishment Period, if the area was seeded during the seeding season and all establishment responsibilities have been met. • If the original seeding construction is completed and accepted outside the permanent seeding dates, the Establishment Period will end 45 Calendar Days after all necessary reseeding is completed and accepted during the following seeding season.
01030.62 Establishment Work:
a.Erosion Control Seeding - Select and provide establishment Work for erosion control seeding from 01030.62(b) necessary to provide performance described in 01030.60.
b.All Other Seeding - Ensure the establishment of wildflower, lawn, plant, water quality, Wetland, Native Plant, and permanent seeding by the following:
1.Protection - Protect seeded areas from trespass and other hazards of damage. Use protective fences and signs at no additional cost to the Agency. Obtain approval of protective methods used. 01030.70
2.Fertilizing and Watering - Apply fertilizer according to 01030.44. Apply water according to good horticultural practice under the prevailing conditions, as required to promote a healthy stand of plants. Obtain water at no additional cost to the Agency.
3.Weed Control - Remove Specified Weeds prior to plants going to seed and keep WMA's and seeded areas "Weed Free" throughout the Establishment Period.
4.Mowing - Mowing is required for lawn seeding and water quality seeding. Do the first mowing of grass when Soil is firm enough to prevent rutting and grass is about 3 inches tall. After mowing, leave grass that is approximately 2 inches tall. At each subsequent mowing, leave about 1 1/2 inches of growth. After the second mowing, grass clippings may be left in place upon written approval. The approval may be granted if: • Mowing is done with a mulching blade. • There are no weed seeds in the mulch. • Mulch is not detrimental to the growth of grass.
5.Repair and Restore - Repair and restore Soil grades and re-seed damaged, settled, or unproductive areas to the specified conditions of this Section at no additional cost to the Agency. Finishing and Cleaning Up
01030.70 Cleanup - Remove weeds, trash, debris, stones, and other extraneous matter from seeded
areas as directed and dispose of according to 00290.20.
01030.71 Waste Disposal - Dispose of materials according to 00290.20.
Measurement
01030.80 Measurement - The quantities of seeding and associated Work performed under this
Section will be measured according to the following: • Unit Basis - Unit basis items will be measured by actual count. • Area Basis - Area basis items will be measured on the ground surface. Soil testing will be measured according to 01040.80. Payment
01030.90 Payment - The accepted quantities of seeding and associated Work performed under this
Section will be paid for at the Contract unit price, per unit of measurement, for the following items: Pay Item Unit of Measurement
a.Weed Control ........................................................................................ Acre
b.Seeding Mobilization ............................................................................. Each
c.Temporary Seeding, ____..................................................................... Acre
d.Permanent Seeding, ____ .................................................................... Acre
e.Wetland Seeding, ____ ......................................................................... Acre
f.Water Quality Seeding, ____ ................................................................ Acre
g.Plant Seeding, ____.............................................................................. Acre
h.Native Plant Seeding, ____................................................................... Acre
i.Wildflower Seeding, ____ ..................................................................... Acre 01030.90
k.Lawn Seeding ...........................................................................Acre or Square Yard
l.Fertilizing............................................................................................... Acre
m.Mulching................................................................................................ Acre Item (a) includes all Work associated with the WCWP. Item (b) includes all labor and transportation of Materials and Equipment, each time the Contractor mobilizes as required for all hydraulically or airborne applied seeding, fertilizing, and mulching. In items (c) through (i), the type of seed mix, such as Mix No. 1, if applicable, will be inserted in the blank. Items (c) through (k) include preparing the seed bed, Soil preparation, seeding, fertilizing, mulching, applying tacking agent, and all establishment Work. When temporary seeding, applied according to 01030.43(a), is later accepted as permanent seeding according to 01030.43(b), payment will be made only one time under the permanent seeding Pay Item. No separate payment will be made for the initial seeding. Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified. No separate or additional payment will be made for: • mobilization for application by blowers, mechanical spreaders, or hand spreading • inspections or maintenance • seeding mobilization if it is not included in the Contract Schedule of Items Partial payments for permanent seeding, regardless of type, will be made as follows: • At completion of seeding ……………….……………….…70% • At completion of seeding Establishment Period….………30% Soil testing will be paid for according to 01040.90. 01040.00
Seeding in other states
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Source: Oregon Standard Specifications for Construction, 2024 Edition. Pages 1021–1035 of 1,268. View official source ↗