Specification 303
Pits and Quarries
Copyright MAIN ROADS Western Australia
MAIN ROADS Western Australia / Specification 303 Pits & Quarries / Page 1 of 13Contract xxx/xx / Document 04/10100 Issue 21/08/09
SPECIFICATION 303
PITS AND QUARRIES
REVISION REGISTER
Date / ClauseNumber / Description of Revision / Authorised
By
21 Aug 09 / Whole document / Custodian reviewed specification, no changes made. / ME
1 Aug 06 / Whole document / Complete revision of Issue 4.2 to new format / MCP
CONTENTS
ClausePage No
GENERAL
303.01SCOPE
303.02REFERENCES
303.03 – 303.25 NOT USED
OPERATIONS
303.26GENERAL
303.27ACCESS TRACKS
303.28PIT ESTABLISHMENT
303.29PIT AND QUARRY REINSTATEMENT
303.30REVEGETATION
303.31 – 303.80 NOT USED
AS BUILT AND HANDOVER requirements
303.81 – 303.90 NOT USED
CONTRACT SPECIFIC REQUIREMENTS
303.91 – 303.99 NOT USED
ANNEXURE 303A
PRINCIPAL’S PITS AND QUARRIES
ANNEXURE 303B
ENVIRONMENTAL MANAGEMENT PLAN
MAIN ROADS Western Australia / Specification 303 Pits & Quarries / Page 1 of 13Contract xxx/xx / Document 04/10100 Issue 21/08/09
SPECIFICATION 303
PITS AND QUARRIES
GENERAL303.01SCOPE
1.The work under this specification consists of the clearing, establishment, and reinstatement of pits and quarries, or sites for embankment material, pavement materials and any other materials to be sourced for the Works.
303.02REFERENCES
1.Australian Standards, MAIN ROADS Western Australia Standards and MAIN ROADS Western Australia Test Methods are referred to in abbreviated form (e.g. AS 1234, MRS 67-08-43 or WA 123). For convenience, the full titles are given below:
Main Roads Specifications
Specification 100GENERAL REQUIREMENTS
Specification 204ENVIRONMENT
Specification 301CLEARING
Specification 302EARTHWORKS
Specification 304REVEGETATION AND LANDSCAPING
303.03 – 303.25NOT USED
OPERATIONS
303.26GENERAL
1.Where fill, pavement or any other materials are to be obtained from pits or sites nominated by the Principal, site operations shall be in accordance with this Specification. Details of pits or sites nominated by the Principal are shown in Annexure 303A. / Principal’s Sites
2.For pits or sites arranged by the Contractor, the Contractor shall obtain any necessary permits required for entry onto the land and for the payment of any royalty for such borrow material. The Contractor shall also comply with the ENTRY TO LAND requirements of Specification 100 GENERAL REQUIREMENTS. / Contractor’s Sites
3.Where pits are known or suspected to be located in a dieback-infected area, all pit operations shall be subject to procedures as specified in Specification 204 ENVIRONMENT. Dieback infected pits or quarries are noted in Annexure 303A. / Dieback Control
4.The Contractor shall prepare an Environmental Management Plan (EMP) prior to the establishment of the pit. The Contractor’s EMP shall address the requirements as detailed in Annexure 303B. / HOLD POINT
303.27ACCESS TRACKS
1.Access to pits, quarries and water supply sites shall be made by following existing road alignments or access tracks wherever possible. Additional clearing to provide a maximum cleared width of four metres for one way tracks and eight metres for two way tracks shall be carried out by the Contractor, where approved by the Superintendent. / Existing Alignments
2.Access tracks shall be cleared in accordance with Specification 301 CLEARING, and topsoil managed in accordance with the requirements for access tracks as detailed in Specification 302 EARTHWORKS. / Clearing
3.All gates on access tracks shall be kept closed when not in use to ensure the safety of stock. / Gates
303.28PIT ESTABLISHMENT
1.Pits shall be established by the Contractor at the locations and within the limits as shown in the Drawings, or as detailed in Annexure 303A. Pits shall be cleared in accordance with Specification 301 CLEARING. / Clearing
2.Any topsoil and vegetation from areas of declared weed species and or environmental weed species shall be cleared and stockpiled separately and disposed in the Contractor’s spoil sites or other authorised waste disposal sites in accordance with Specification 301 CLEARING. / Weed Control
3.Topsoil shall be stripped and stockpiled in accordance with Specification 302 EARTHWORKS. / Topsoil
4.Cleared vegetation shall be removed and stacked in neat manageable stockpiles at locations approved by the Superintendent. Topsoil and overburden shall be removed to the depths as detailed in Annexure 303A and stockpiled on one side within the cleared area. Sufficient area shall be cleared to allow for topsoil and overburden removal and storage in separate stockpiles. Topsoil shall not be mixed with any underlaying material in the stripping and stockpiling process. / Topsoil & Overburden
5.Boulders and isolated rock formations contained within pits shall be ripped in order to render such material suitable for incorporation into the Works. / Rocky Ground
6.Any open gullet holes located within the boundaries of the cleared area shall be backfilled carefully to avoid contamination of the borrow material before clearing of the pit. / Gullet Holes
7.Where such details are shown, pits shall be excavated to the shape and levels indicated in the Drawings. Where no such details are given, the extent of excavation shall be the minimum necessary to provide the required material with least disturbance to the surrounding environment. / Excavation
303.29PIT AND QUARRY REINSTATEMENT
1.At the completion of operations the Contractor shall rehabilitate used, exhausted and obsolete pits and quarries.
2.The sides and floors of pits shall be formed to a flowing finish with side slopes not steeper than 1 vertical to 6 horizontal. / Pit Shaping
3.During pit reshaping any material carted to the pit shall be spread uniformly over the entire shaped surface. The order of spreading shall be declared weeds and undesirable vegetation (if any), removed bituminous surfacing (lump form), demolition material, rock, oversize material, unsuitable material, spoil, overburden, topsoil and vegetation litter. / Order of Respreading
4.Topsoil shall be spread over the shaped batters, filled areas and bare areas of the pits to a depth of not less than the depth shown in Annexure 303A. / Topsoil
5.Following the spreading of topsoil, the entire pit shall be ripped along the contours to a depth of 500mm and at not more than 500mm spacing. / Ripping
6.Pits with rock bases shall be ripped and reinstated in accordance with this Specification unless the Contractor can demonstrate that the rock base meets the requirements for the definition for rock in accordance with Specification 302 EARTHWORKS, in which case reinstatement shall be in accordance with the Environmental Management Plan. / Rocky Ground
303.30REVEGETATION
1.Planting and direct seeding shall be carried out after the topsoil has been placed, shaped and prepared for planting and seeding operations
2.The Contractor shall prepare a plant and seed species list that is representative of the native vegetation (trees, and understorey species) in adjacent areas and the list is to be included in the Environmental Management Plan. / Plant and Seed Species List
3. The plant and seed list shall nominate the plant size and spacing of all planting, the quantities by seed species in a seed mix and the seeding rate (kg per hectare) to be used in any revegetation of the area to be rehabilitated.
4.The Contractor shall supply and hand-plant tube stock in good condition using the species and spacing nominated in the plant list. / Tubestock
5.The Contractor shall supply and direct seed the areas to be seeded using the seed species mix and seeding rate (kg per hectare) as nominated in the plant list. / Direct Seed
6.All planting, seeding and or weed control operations shall be undertaken in accordance with Specification 304 REVEGETATION AND LANDSCAPING.
7.The completion criteria for revegetation shall be in accordance with the Environmental Management Plan. / Completion Criteria
303.31 – 303.80NOT USED
AS BUILT AND HANDOVER requirements
303.81 – 303.90NOT USED
CONTRACT SPECIFIC REQUIREMENTS
303.91 – 303.99NOT USED
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ANNEXURE 303A
PRINCIPAL’S PITS AND QUARRIES
1.DETAILS OF PITS AND QUARRIES
1.1Details nominated by the Principal are as follows:
Site / Material Type / Purpose in Works / Approx Quantity Available (m³) / Depth of Topsoil Removal (mm) / Depth of Overburden Removal (mm) / Depth of Topsoil Respread (mm) / Other RequirementsMAIN ROADS Western Australia / Specification 303 Pits & Quarries / Page 1 of 13
Contract xxx/xx / Document 04/10100 Issue 21/08/09
ANNEXURE 303B
ENVIRONMENTAL MANAGEMENT PLAN
The Environmental Management Plan (EMP) shall form part of the Contractor’s Environmental Quality Plan in accordance with Specification 204 ENVIRONMENT. The Environmental Management Plan shall be prepared by an experienced person in environmental management and shall be approved by the Contractor’s Environmental Management Representative.
MAIN ROADS Western Australia / Specification 303 Pits & Quarries / Page 1 of 13Contract xxx/xx / Document 04/10100 Issue 21/08/09
SPECIFICATION 303 GUIDANCE NOTES
DELETE THESEGUIDANCE NOTES FROM FINAL DOCUMENT AFTER USING FOR REFERENCE
All edits to downloaded TDP documents shall be tracked (most word processing software allows this to be done automatically). Deletions shall be struck through e.g. example. Insertions shall be in italics e.g. example. If all information relating to a clause is deleted then the clause number should be retained and the words "NOT USED" should be inserted.
The proposed documents with tracked changes shall be submitted to the Project Manager for review, prior to printing the final batch of documents. When this final printing is carried out, the tracked changes option is to be turned off.
The Custodian of this specification is theSenior Environment Officer.
1.ANNEXURE 303A
Insert requirements for Borrow Pit management into Annexure 303A. The column “Other Requirements” could be used to indicate the need for Dieback Controls at particular pits.
2.ANNEXURE 303B
Insert the Principal’s Environmental Management Plan or the Contractor requirements for preparing the plan in Annexure 303B. The plan must be prepared by an experienced person and reviewed by the Main Roads regional environment officer or the Main Roads Environment Branch. The plan must be prepared and approved prior to the start of pit site operations. Consultation with landholders or land managers must be included in the preparation of the plan and in determining completion criteria.
Completion criteria give the Superintendent something to measure against if the works are completed by Contract. On CALM land, Main Roads is required to achieve a certain plant coverage or survival rate. Other requirements may apply on private land, e.g. return to pasture or timber plantation or alternative crop.
If the Environmental Management Plan does not nominate any rehabilitation completion criteria then the revegetation should be in accordance with the completion criteria in Specification 304 REVEGETATION AND LANDSCAPING. Seek the advice of the Environment Branch to assist in the determination of the appropriate rehabilitation treatment, and ensure the SMM clauses include a suitable reference to any additional requirements.
For further guidance refer to the Environmental Guideline – Pits and Quarries prepared by the Main Roads Environment Branch. This document includes guidance on environmental approvals and on the expected contents of an Environmental Management Plan.
3.MAINTENANCE OF EXISTING ROADS
If a severe impact on a public road is anticipated due to heavy haulage, maintenance of the road can be included, i.e. where a public road forms part of a major haul road, the road shall be maintained to the same standard as at the date of Possession of Site.
Insert a suitable clause in CONTRACT SPECIFIC REQUIREMENTS.
4.REINSTATEMENT OF ROCKY GROUND IN PITS OR QUARRIES
The treatment for extensive rock base that cannot be ripped will depend on the pit location, drainage and what revegetation is to occur. Usual practice is to build up the landform to allow vegetation to establish (e.g. > 1 metre depth) by the return of the overburden, topsoil and vegetation cleared from the pit site. The Environmental Management Plan should identify the suitable treatment on a site-specific basis, e.g. if rock outcrops naturally occur in the area then exposed rock may be acceptable.
Include relevant requirements in Annexure 303B, and insert a suitable clause in CONTRACT SPECIFIC REQUIREMENTS.
CONTRACT SPECIFIC REQUIREMENTS TO ADD OR DELETE
The following clauses are to be placed under the CONTRACT SPECIFIC REQUIREMENTS as required.
NONE AT THIS TIME.
SPECIFICATION AMENDMENT CHECKLIST
Specification Name:No: 303 RevisionNo: ______Title:PITS AND QUARRIES
Project Manager: Name:______Signature: ______Date:______
Checked By:Name: ______Signature: ______Date:______
ContractNo:______Contract Description:______
ITEM / DESCRIPTION / SIGN OFFNote: All changes/amendments must be shown in Tracked Change mode until approved.
1. / Project Manager has reviewed Specification and identified Additions and Amendments.
2. / CONTRACT SPECIFIC REQUIREMENTS addressed? – Contract specific materials/products/clauses added? (Refer Specification Guidance Notes for guidance).
3. / Any unlisted Materials/Products proposed and approved by the Project Manager? – if “Yes” provide details at 15.
4. / Standard Clauses amended? – MUST SEEK approval from MCP.
5. / Clause deletions shown as ‘NOT USED’.
6. / Appropriate INSPECTION & TESTING parameters included in Spec 201 (Test Methods, Minimum Testing Frequencies verified).
7. / ANNEXURES completed (Refer Specification Guidance Notes).
8. / HANDOVER and AS BUILT requirements addressed.
9. / Main Roads QS has approved changes to SMM.
10. / Project Manager certifies completed Specification reflects intent of the design.
11. / Completed Specification – independent verification arranged by Project Manager
12. / Project Manager’s review completed.
13. / SPECIFICATION GUIDANCE NOTES deleted.
14. / TABLE OF CONTENTS updated.
15 / Supporting information prepared and submitted to Project Manager.
Further action necessary:
Signed: (Project Manager)Date:______
MAIN ROADS Western Australia / Specification 303 Pits & Quarries / Page 1 of 13Contract xxx/xx / Document 04/10100 Issue 21/08/09