Specifications
SPRAYGRASS SERVICE SPECIFICATIONS
Extent of Work
The work included in this contract is as follows:- Seeding by tractor drawn implements all flat and low slopes, less than 3:1 areas adjacent to the roadside or power station development, etc.
Contractors Qualifications
Each tenderer shall submit documentary evidence of his proven ability to carry out this type of work. Such evidence shall include a list of similar projects satisfactorily completed together with a statement of the qualifications and/or experience of the personnel to be employed on the works.
Site Preparation
After topsoiling (if required) all area to be seeded shall be cultivated to provide a reasonably firm but friable seed bed, free of weed or plant growth, large stones or other debris, and the whole area left ready to receive the seeding operation.
Application Rates
The required areas shall be treated by the Contractor will the following:-
Certified Seed Native Seed Minimum of 60Kg per hectare The seed mix will vary according to the season, soil condition and clients requirement.
Native SeedUp to 102 15 kg of selected species.
Fertiliser 200kg 500kg if selected fertiliser
Note: The seeds and fertilizer application rates are a representative sample only of the quantities that should be applied per hectare.
Seeding will be carried out by sowing through either a tyne, disc or sod seeder or by spinner broadcaster followed by harrowing. Fertilizer can be spread through the seeder at the time of sowing or spread by means of a fertilizer spreader or spinner broadcaster.
After Care Maintenance
Where possible, water adequately to ensure a continuous vigorous and healthy growth of grass. A great deal will depend on natural rainfall, but as a general guide, 25mm of water should be applied to all seeded areas weekly. Six weeks after germination, sulphate of ammonia can be applied by mechanical spreader and well watered into the grass, or it may be applied in solution.
After the grass has reached a height of 200mm to 300mm it shall receive a first cut to remove approximately half the height of the leaf growth. Mowing shall be done by tractor-drawn slashing equipment or hand operated slasher or mower. If you would like any additional information on this service, please Contact Us.
Extent of Work
The work included in this contract is as follows:
Hay/Straw Mulching of Roadside Batters,etc on slopes generally less than 3:1.
Contractors Qualifications
Each tenderer shall submit documentary evidence of his proven ability to carry out this type of work. Such evidence shall include a list of similar projects satisfactorily completed together with a statement of the qualifications and/or experience of the personnel to be employed on the works.
Site Preparation
It is recommended that whenever possible, areas to be seeded should be topsoiled. Prior to topsoiling, the area should be ripped (up to 200mm deep). If topsoiling is impracticable, the area should be ripped using a suitable machine or a chain designed for this purpose. Wherever possible the area should be free of weed growth, large stones or other debris.
Application Rates
The required areas shall be treated by the Contractor with the following:
a. Certified Seed Native SeedMinimum 60kg per hectare. The seed mix will vary according to the season, soil condition and client requirement.
Native Seed: 10-15kg of selected species.
b. Fertiliser
200kg - 500 kg per hectare. Selection will depend on soil analysis results and client requirements.
c. Hay/StrawAverage bale = 20kg. 250 bales per hectare ( minimum).
d. Binder
Anionic Bitumen Emulsion 50/50 bitumen water 1500 3500 litres per hectare. Polymer binder maximum 350 litres per hectare.
Note: The seed and fertiliser rates are a representative sample only of the quantities that should be applied per hectare.
Operation
Application of Seed and Fertiliser
Seed and fertilise can be sown in several ways but the method will depend on the topography of the site.
On slopes less that 3:1 Apply by conventional tractor drawn sowing equipment or spread with spinner broadcaster and then harrowed in. In some cases where the area is smaller, seed and fertiliser can be spread by hand and raked into the surface.
On slopes greater than 3:1 Seed & Fertiliser should be hydroseeded through a hydromulching machine. This method can also be used in those larger difficult and inaccessible areas where conventional equipment could no operate or where it would not be safe or prudent to hand broadcast the seed and fertiliser.
Note: Where lime or Gypsum is required in some cases this can be applied in the same mix as the seed and fertiliser. Higher quantities may need to be applied as a separate operation.
Application of Bitumen and Hay/Straw
Straw/Hay shall be applied through a Finn Straw mulching machine or machine designed for this purpose that can operate in the same or similar way.
There are two approaches
Both the Hay/Straw and Bitumen Emulsion can be applied at the same time through the Finn Straw Mulching machine.
Straw can be applied as a separate operation followed by an overspray of Bitumen Emulsion.
Note: In this approach other binders, such as Polymer, can be used to tack down the straw.
Application rates for this operation will vary according to the product used. The suggested rates are as follows:
Liquid Polymer Binder 300 350 Kg per hectare Powder Envirotack 40 60 Kg per hectare
After Care Maintenance
Where possible, water adequately to ensure a continuous vigorous and healthy growth of grass. A great deal will depend on natural rainfall, but as a general guide, 25mm of water should be applied to al seeded areas weekly. It is important that the seed bed under the Hay/Straw Mulch Mat be kept moist until germination occurs. After germination, sufficient watering must be kept up until a healthy sward of grass is achieved. If you would like any additional information on this service, please Contact Us.
Extent of Work
The work included in this contract is as follows:-
Revegetation of Roadside Batters on slopes generally less that 3:1
Contractors Qualification
Each tenderer shall submit documentary evidence of his proven ability to carry out this type of work. Such evidence shall include a list of similar projects satisfactorily completed together with a statement of the qualifications and/or experience of the personnel to be employed on the works.
Site Preparation
It is recommended that whenever possible, areas to be seeded should be topsoiled. Prior to topsoiling, the area should be ripped (up to 200mm deep). If topsoiling is impracticable, the area should be ripped using a suitable machine or a chain designed for this purpose.
Wherever possible the area should be free of weed growth large stones or other debris.
Application Rates
The required areas shall be treated by the Contractor with the following:
a. Certified Seed Native SeedMinimum 60kg per hectare. The seed mix will vary according to the season, soil condition and client requirement. 10-15kg of selected species.
b. Fertiliser200kg - 500 kg per hectare. Selection will depend on soil analysis results and client requirements.
c. Wood Fibre Mulch (Dyed green)2 tonnes per hectare.
d. Binder Polymer binder maximum 250 litres per hectare or Envirotack at 40kg 60 kg per hectare.
Note: The seed and fertiliser rates are a representative sample only of the quantities that should be applied per hectare.
Operation
Seed, fertiliser, wood fibre mulch, water and binder shall be thoroughly mixed together with water to provide a slurry and then applied under pressure onto the area to be treated by means of hydromulching equipment specifically designed for this purpose and by operators trained in the use of this equipment.
After Care Maintenance
Where possible, adequate water should be applied to ensure a continuous and healthy growth of grass. A great deal will depend upon natural rainfall, but as a general guide, 25mm of water should be applied to all seeded areas weekly. It is important that the wood fibre mulch be kept moist until germination occurs. After that, sufficient watering must be kept up until a healthy sward of grass is achieved.
If you would like any additional information on this service, please Contact Us.
Hydromulching Using Native Species Specifications
Extent of Work
The work included in this contract is as follows:
Native Seeding of Roadside Batters etc
Contractors Qualifications
Each tenderer shall submit documentary evidence of his proven ability to carry out this type of work. Such evidence shall include a list of similar projects satisfactorily completed together with a statement of the qualifications and/or experience of the personnel to be employed on the works.
Site Preparation
It is recommended that whenever possible, areas to be seeded should be topsoiled. Prior to topsoiling, the area should be ripped (up to 200mm deep). If topsoiling is impracticable, the area should be ripped using a suitable machine or a chain designed for this purpose. Wherever possible the area should be free of weed growth large stones or other debris.
Hydromulching
The application of Hydromulching Native seed shall commence immediately after topsoil has been placed or the surface prepared.
Application Rates
The required areas shall be treated by the Contractor will the following:
a. Native Seed (cover crop) 5 kg - 10kg per hectare. 20kg -50kg per hectare
b. Fertiliser (if applicable)250kg kg per hectare.
c. Wood Fibre Mulch (dyed green)2 tonnes per hectare.Polymer Binder (Liquid) Envirotack (Powder) Maximum 250 litres per hectare 40kg 60 kg per hectare.
Note: The seed and fertiliser rates are a representative sample only of the quantities that should be applied per hectare.
Operation
Seed, fertiliser, wood fibre mulch, water and binder shall be thoroughly mixed together with water to provide a slurry and then applied under pressure onto the area to be treated by means of hydromulching equipment specifically designed for this purpose and by operators trained n the use of this equipment.
After Care Maintenance
Where possible or practicable watering of the seeded area should be carried out. In this situation the wood-fibre should be kept moist until a satisfactory germination occurs. After this, sufficient watering must be kept up until the native plants have reached a stage where they can survive in their own right.
Note: Seed Preparation
1. The seeds of many Australian Native Species have a hard outer covering that must be removed or softened before germination can take place. Nature relies on bush fires to assist germination of some species by splitting the outer coating with heat. With the hydromulching technique, we immerse the hard seeds (eg Acacia) in boiled water and leave them to soak for up to 24 hours before planting.
2. In this operation the germination of Australia Native Species is not reliable and therefore can take up to 3 to 12 months before a result is achieved.
If you would like any additional information on this service, please Contact Us.
Extent of Work
The work included in this contract is as follows:
Jute meshing of catch drains and steep slope batters etc
Contractors Qualifications
Each tenderer shall submit documentary evidence of his proven ability to carry out this type of work. Such evidence shall include a list of similar projects satisfactorily completed together with a statement of the qualifications and/or experience of the personnel to be employed on the works.
Site Preparation
It is recommended that whenever possible, areas to be Jute meshed should be topsoiled. Wherever possible the area should be free of weed growth large stones or other debris leaving an even surface on which to lay the mat.
Operation
Steep Slope Areas. Greater than 3:1
On the steep slopes the mat is laid vertical to the slope.
The top end is buried in a minimum 150mm deep trench and pegged at 500mm centres.
Where joined the Mat must be overlapped at minimum 150mm
At the bottom end of the Mat, lap 150mm and staple at 500mm centres.
Where the laps join down the slope, pins should be at 500mm centres.
Placement of Jute Mesh in the Drains and General Flat Areas
Where one strip is laid:
The Mat is laid horizontally down the drain.
The top end of the Mat is buried in a 150mm deep trench and pinned down at 200mm centres.
One pin at 1 lineal metre intervals is placed down the centre of the drain and the outer edges stapled at 2 lineal metres intervals.
Each join to be overlapped at 150mm and pins placed at 200mm intervals across the join.
The outer edges of the mat to have pins at 2 lineal metre intervals.
Where mats join down the middle of the drain they must overlap 150mm and be stapled at 2 pins per 1 lineal metre intervals.
Bitumen Emulsion Application
After the Jute Mesh has been laid and application of slow breaking medium putting anionic bitumen emulsion at the rate of 0.5 litre per m2 of straight product is to be sprayed over the meshed area. In the more difficult slope and water flow areas this rate can be increased to 1 litre per m2.
Seed and Fertilising of the Area
Seeding and fertilising of the area can be carried out prior to the laying of the mat or after it has been laid prior to the application of Bitumen Emulsion. It has been common practice to seed after placement of the mat prior to the application of Bitumen. Placement prior to the laying of the mat can cause considerable disturbance to the seen bed whilst the mat is being laid.
If you would like any additional information on this service, please Contact Us.