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Section Cover SheetSection 02923

2006-10-31 Drill Seeding

Use this section to specify requirements for drill seeding. Drill seed all disturbed areas, 3H:1V or flatter, that are located within the Site limits. The seeding may also be carried out through a separate contract (including a highway maintenance contract) when climate conditions are more conducive to the seeding and grass growth. Discuss the timing and contractual requirements with Alberta Transportation.

The designer should:

.1 Perform a vegetation assessment of the right of way and adjacent properties to determine the presence of native plant communities, and to determine the limits for reseeding with either native seed mixture or agronomic seed mixtures.

.2 In those areas where reseeding with agronomic seed mixtures is appropriate, perform topsoil analysis for canals a minimum of one sample per kilometer, and where there are distinctive soil type changes. Where topsoil samples have similar consistency along an uninterrupted length of the project, the individual samples shall be blended together. An uninterrupted length is defined as a portion of the right of way with consistent soil types, and no geographical obstacles such as watercourses or major intersections. Each remaining topsoil sample (individual and/or blended) shall be tested to determine the appropriate fertilizer composition and application rate. For projects other than canals, provide a recommendation to Alberta Transportation for appropriate topsoil analysis.

This section is modified for compatibility with Standard Specifications for Highway Construction clause 2.20 Seeding, revised 20050722, the Special Provisions SPC-G039, and the Design Bulletin No. 25 “Grass Seed Mixtures Used on Highway and Bridge Projects” affecting 5 sections of the current CWMS as follows:

2 primary sections:

02923 – Drill Seeding02924 – Hydroseeding

3 secondary sections:

01280 – Measurement and Payment02910 – Topsoil and Subsoil Placement02930 – Soil Erosion Protection

Edit this section to suit the Contract requirements.

CWMS Civil Works Master Specification

Alberta TransportationMaster Specification System



If the seeding, maintenance, and acceptance time of this work cannot be carried out due to cold or frozen conditions, consider excluding this work from the prerequisites for Substantial Performance of the Work, and include it as a prerequisite for Total Performance of the Work. Specify a date for completion of drill seeding in Section 01110 – Summary of Work.

Edit the specification text of Section 01110 – Summary of Work and Section 01775 – Contract Acceptance Procedures accordingly.

In cases where erosion control systems are required to protect drill seeded areas from erosion, use Section 02930 – Soil Erosion Protection. The section includes additional mulch and tackifier specifications for use over drill seeding when required. Ensure requirements are co-ordinated in the Measurement Schedule –Section 01280.

Heading of Specification Text Specification Note

Part 1 General

1.1 References

1.2 Submittals

1.3 Delivery, Storage, and Handling

Part 2 Products

2.1 Materials

.2 Modify seed composition as required to suit the Site location. Refer to map of Seed Mix Zones for recommended native and agronomic seed mixes based on INFTRA’s Design Bulletin No. 25. Add native mixes Zones 1, 2, 3 and 5, and 6 as required.

Delete either composition type agronomic or native seed when the seed is not used in the work.

Modify fertilizer composition as required to suit the seed mixture and soil conditions. Do not apply fertilizer where native seed mixes are applied.

Part 3 Execution

3.1 Preparation





Heading of Specification Text Specification Note

3.2 Notification of Commencement

3.3 Weather Conditions

3.4 Application

.3 Include application rates for seed, cover crop, and fertilizer as required.

[.8] Include if Section 02930 – Soil Erosion Protection is provided.

3.5 Broadcast Seeding

3.6 Protection

3.7 Watering Since the scope of work including performance requirements for watering cannot be clearly defined, it will valued in accordance with Section 00725 – General Conditions, clause 8.3 - Valuation of Changes in the Work.

3.8 Reseeding

.1 Edit which approach will be taken. The second approach is based on the Standard Highway Specifications. Edit time requirements for re-application if required.

END OF COVER SHEET



Data Sheet – Seed Mixture Zones and Seed Mixtures Section 02923


SEED MIXTURE ZONES

Agronomic Seed Mixes

Common Name Latin NameSeed Mix – Percentage

by Dry Weight*Zone 1, 2, 3, 6 *Zone 4, 5

Pubescent Wheat Grass Agropyron trichophorum 40% 32%Dahurian Wildrye Elymus dahuricus 22% 30%

Sheep Fescue Festuca ovina 30% 30%Perennial Ryegrass Lolium perenne 8% -

Cereal Rye Secale cereale - 8%*See Zone names and descriptions under Native Seed Mixes

Native Seed MixesZone 1 - Peace River District - north and west of High Level:

Seed Mix Zone

Native Seed Mix Percentage by Dry WeightCommon Name Latin Name

1

Wetland Mixedwood

Slender Wheat Grass Agropyron trachycaulum 35%Fringed Brome (1) Bromus ciliatus 15%Tufted Hairgrass Deschampsia cespitosa 15%

Northern Wheat Grass Agropyron dasystachyum 15%Rocky Mountain Fescue Festuca saximontana 10%

Fowl Bluegrass Poa palustris 10%1 Fringed Brome seed shall be coated.

Zone 2 - Athabasca District (south of Athabasca) and Grande Prairie District

Seed Mix Zone


2

DryMixedwood

Slender Wheat Grass Agropyron trachycaulum 35%Fringed Brome (1) Bromus ciliatus 20%

Northern Wheat Grass Agropyron dasystachyum 15%Tufted Hairgrass Deschampsia cespitosa 10%Rocky Mountain

FescueFestuca saximontana 10%

Fowl Bluegrass Poa palustris 10%1 Fringed Brome seed shall be coated.



Data Sheet – Seed Mixture Zones and Seed Mixtures (Cont’d)Section 02923


Zone 3 - Athabasca District (north of Athabasca) and Hwy. Nos. 88, 750, 986

Seed Mix Zone


3

Central Mixedwood

Slender Wheat Grass Agropyron trachycaulum 35%Rocky Mountain Fescue Festuca saximontana 20%

Tickle Grass Agrostis scabra 10%Fringed Brome (1) Bromus ciliatus 10%Canada Wildrye Elymus canadensis 10%Tufted Hairgrass Deschampsia cespitosa 10%Fowl Bluegrass Poa palustris 5%

1 Fringed Brome seed shall be coated.

Zone 4 - Lethbridge District (east of Hwy 22), Calgary District (east of Hwy 22), and Hanna District

Seed Mix Zone


4

Mixedgrass and Dry

Mixedgrass

Slender Wheat Grass Agropyron trachycaulum 30%Canada Wildrye Elymus canadensis 15%Mountain Brome Bromus carinatus 15%

Northern Wheat Grass Agropyron dasystachyum 10%Western Wheat Grass Agropyron smithii 5%

Indian Rice Grass Orzyopsis hymenoides 5%Alkali Grass Puccinellia distans 10%

Needle and Thread Grass

Stipa comata 10%

Zone 5 - Stony Plain, Vermillion, and Red Deer (east of Hwy 22) Districts:

Seed Mix Zone


5

Central Parkland

Slender Wheat Grass Agropyron trachycaulum 25%Northern Wheat Grass Agropyron dasystachyum 10%

Fringed Brome (1) Bromus ciliatus 15%Green Needle Grass Stipa viridula 15%

Canada Wildrye Elymus canadensis 10%Indian Rice Grass Orzyopsis hymenoides 10%

Nuttall’s Alkali Grass Puccinellia nuttalliana 10%Western Wheat Grass Agropyron smithii 5%


Alberta Infrastructure and TransportationMaster Specification System



1 Fringed Brome seed shall be coated.Zone 6 - Lethbridge, Calgary, and Red Deer Districts all located west of Hwy 22:

Seed Mix Zone


6

LowerFoothills

Slender Wheat Grass Agropyron trachycaulum 30%Smooth Wildrye Elymus glaucus 20%

Northern Wheat Grass Agropyron dasystachyum 10%Tickle Grass Agrostis scabra 10%

Fringed Brome (1) Bromus ciliatus 10%Tufted Hairgrass Deschampsia cespitosa 10%

Foothills Rough Fescue Festuca campestris 10%1 Fringed Brome seed shall be coated.





END OF DATA SHEETSCWMS Civil Works Master Specification


Section 02923Drill Seeding

Tender No.: [ ] Page 1

PART 1 GENERAL

1.1 REFERENCES

.1 Provide drill seeding in accordance with the following standards (latest revision) except where specified otherwise.

.2 Government of Canada

.1 Seeds Act and Seeds Regulations

.2 Fertilizers Act and Fertilizers Regulations

.3 Government of Alberta

.1 Weed Control Act and Weed Regulation.

.2 Design Guidelines for Erosion and Sediment Control, Appendix C – Erosion and Sedimentation Control, Best Management Practices (BMP) - #34 (a-c) www.transportation.alberta.ca .

1.2 SUBMITTALS

.1 Provide the following submittals.

.2 The following test results at least 15 days prior to the delivery of seeds to the Site.

.1 Certificate of Analysis for each seed supplied with test results showing:

.1 germination rate, or when native seeds are specified and are not a part of the seed tables, the Tetrazolium results, and

.2 purity.

[.2] Seed mix composition expressed as a percentage of each seed species by dry mass for each seed mix specified.

1.3 DELIVERY, STORAGE, AND HANDLING

.1 Provide seed in standard containers clearly labelled with the following information:

.1 Supplier’s name and address.

.2 Lot number.

http://www.transportation.alberta.ca/



.3 Net mass.

.4 Mixture Composition: Names and percentages of individual seed species.

.2 Protect seed from direct sunlight, moisture, mould, and other detrimental conditions, while in transit and storage.

.3 Provide fertilizer in standard containers clearly labelled with the following information:

.1 Supplier’s name and address.

.2 Specified composition.

.3 Net mass.

PART 2 PRODUCTS

2.1 MATERIALS

.1 Provide materials in accordance with the following.

.2 Seed Mix Composition:

.1 Common No. 1 Grade seeds in accordance with the Government of Canada Seeds Act and Seeds Regulations. Supply seed mixed by a conditioner and bulk storage facility approved by the authority responsible for Canada Seeds Act & Regulations. All seed shall be tested by a Registered Seed Lab.

.2 Seeds and seed mixtures subjected to moisture, mould, and detrimental conditions will not be accepted by the Minister.

.3 Agronomic Composition: Seed Mix per Zone [ 4 ] [ ] as shown in the following schedule titled Agronomic Seed Mix.

Agronomic Seed Mix

Common Name Latin NameSeed Mix – Percentage

by Dry WeightZone 1, 2, 3, 6 Zone 4, 5

Pubescent Wheat Grass Agropyron trichophorum 40% 32%

Dahurian Wildrye Elymus dahuricus 22% 30%Sheep Fescue Festuca ovina 30% 30%

Perennial Ryegrass Lolium perenne 8% -Cereal Rye Secale cereale - 8%



.4 Cover Crop: Add agronomic seed Common No. 1 Grade to the Seed Mix specified in the schedule titled Agronomic Seed Mix. Add cover crop seed using a seed variety selected by the Contractor, when seeding is performed after September 15 of any year, or a later date if acceptable to the Minister.

.5 Native Composition: Seed Mix per Zone [ 4 ] [ ] as shown in the following schedule titled Native Seed Mix:

Seed Mix Zone


4

Mixedgrass and Dry

Mixedgrass

Slender Wheat Grass Agropyron trachycaulum

30%

Canada Wildrye Elymus canadensis 15%Mountain Brome Bromus carinatus 15%Northern Wheat

GrassAgropyron

dasystachyum10%

Western Wheat Grass Agropyron smithii 5%Indian Rice Grass Orzyopsis

hymenoides5%

Alkali Grass Puccinellia distans 10%Needle and Thread

GrassStipa comata 10%

.3 Fertilizers:

.1 Do not apply fertilizers where native seed mixes are applied.

.2 In accordance with the Canada Fertilizers Act and Fertilizers Regulations.

.3 Compatible with the seed mix composition and soil conditions.

.4 Composition:

Nitrogen [16] [ ]Phosphates [20] [ ]Potash [0] [ ]

.4 Water: Free of impurities that would inhibit or adversely affect germination and growth of the seed.



PART 3 EXECUTION

3.1 PREPARATION

.1 Prepare areas as specified in Section 02910 – Topsoil and Subsoil Placement prior to drill seeding areas.

.2 Provide prepared surfaces that are free of frost and standing water.

3.2 NOTIFICATION OF COMMENCEMENT OF WORK

.1 Notify the Minister at least 48 hours prior to any seeding Work. Do not commence seeding operations until all areas designated for seeding have been prepared to the satisfaction of the Minister.

.2 Do not commence seeding operations until the Minister has reviewed the Certificate of Seed Analysis and verified the specified seed mix composition supplied.

3.3 WEATHER CONDITIONS

.1 Do not proceed with the work when, in the opinion of the Minister, weather conditions are unsuitable. The Minister will not allow work to proceed when wind conditions are such that material is being carried beyond the designated work areas or that the material is not being uniformly applied.

3.4 APPLICATION

.1 Drill seed the areas specified in the Contract Documents or as directed by the Minister.

.2 Measure the quantities of seeding materials by weight.

.3 Apply the following:

.1 Drill seed mix composition at a rate of 15 kg/hectare.

[.2] Fertilizer composition at a rate of [150] [ ] kg/hectare.

[.3] Cover crop seed at a rate of 5 kg/hectare.

.4 Apply the seeding materials during calm weather.

.5 Perform drill seeding as follows:

.1 Perform seeding by press drilling.



.2 Regulate the seed drill to uniformly distribute the seeds.

.3 Regulate the seed drill so that the seeds are properly placed in the soil and covered to a depth of between 20 and 40 mm.

.4 Apply the seeds in rows oriented crosswise to the slope. Do not apply seeds using rows that follow the slope unless crawler tractor compaction perpendicular to the slope is immediately provided to eliminate all preferential paths for surface runoff.

.5 Do not apply fertilizer with the seed unless the seed drill is equipped to sideband and uniformly distribute the fertilizer. Do not mix the fertilizer with the seeds.

.6 When a fertilizer composition is required in the Contract Documents, apply it uniformly.

.7 Where the seeding adjoins existing vegetation, overlap the seeding application at least 300 mm into adjacent vegetated areas.

.8 Do not seed on hardened, crusted or rutted soil.

[.9] Protect seeded areas against erosion or damage as specified in Section 02930 – Soil Erosion Protection.

3.5BROAD-CAST SEEDING

.1 In areas that are inaccessible to drill seeding equipment, as determined by the Minister, use broad-cast seeding methods.

.2 Use an acceptable cyclone seeder or approved hand methods. Any areas seeded using broad-cast methods shall be immediately harrowed to provide an acceptable covering of soil for the seed, and surface textured using track-walking or some other means acceptable to the Minister.

.3 Provide a means of verifying the quantities of seed and fertilizer applied using cyclone or hand-methods. Provide either quantity by weight, or by a system of volume measurement acceptable to the Minister.

.4 Apply the broad-cast seed mix composition at a rate of 30 kg/hectare.



.5 Slope texturing of broad-cast seeding:

.1 Roughen the surface by some mechanical means acceptable to the Minister, or by track-walking a dozer or similar tracked vehicle up and down the slope leaving depressions perpendicular to the slope direction. Perform the work in accordance with the Design Guidelines for Erosion and Sediment Control Appendix C, Best Management Practices 34a, except as modified herein.

3.6 PROTECTION

.1 Ensure seeding does not dislodge soil or cause erosion.

.2 Protect existing work, and the Work of the Contract, and repair any damage to such Work.

3.7 WATERING

.1 Water the seeded areas after seeding to achieve germination and a uniform stand of grass. [The Minister will determine when watering will be required, and will provide the Contractor with at least 24 hours advance notice to commence watering seeded areas.] [Determine when watering will be required, provide the Minster with at least 24 hours advance notice, and obtain authorization from the Minister prior to proceeding.]

.2 Apply water uniformly to seeded areas without causing displacement or erosion of the materials and soil.

.3 Minimize travel on seeded surfaces.

.4 Use watering equipment and techniques authorized by the Minister.

.5 Watering of seeded areas will be valued in accordance with Section 00725 – General Conditions, clause 8.3 - Valuation of Changes in the Work.

3.8 RESEEDING

.1 At locations that fail to show a uniform stand of grass for any reason during the calendar year following the year of initial seeding, repair the defective locations as determined by the Minister. A uniform stand of grass will be considered growth that shows no deterioration or exposed soil greater than 1 square metre in size, and provides a minimum of 80 percent ground cover as determined by the Minister.



.2 The Minister will inspect the seeding during the month of May of the calendar year following the year of initial seeding. Complete any required reseeding work prior to June 15 of that year. This date will be extended if, in the opinion of the Minister, the weather conditions prior to June 15 are not suitable for reseeding Work.

.3 Meet all the requirements for initial seeding, including seeding method, seed and fertilizer mix composition, application rates, harrowing, and slope texturing as applicable.

[.4] The contractor will not be required to reseed any area more than once.

END OF SECTION