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Guidelines for Road Works, Drainage and Subdivision Development

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Guidelines for Road Works, Drainage and Subdivision Development Attachment A GUIDELINES FOR ROAD WORKS, DRAINAGE AND SUBDIVISION DEVELOPMENT Adopted 12 September 2002 Updated 22 July 2014 Doc ID 33063 Attachment A 1. GENERAL REQUIREMENTS ............................................................ 3 2. DESIGN AND CONSTRUCTION CRITERIA .................................. 6 2.1. General ................................................................................... 6 2.2. Roads ...................................................................................... 6 2.2.1. General .............................................................................. 6 2.2.2. Urban Roads (other than Industrial) ................................... 7 2.2.3. Industrial Roads ................................................................. 7 2.2.4. Rural Residential Roads ..................................................... 7 2.2.5. Rural Roads ....................................................................... 8 2.2.6 Roman Data ....................................................................... 8 2.3 Design Standards – General .................................................... 9 2.4 Public Utility Conduits ............................................................ 10 2.5 Clearing and Stripping ........................................................... 10 2.6 Earthworks ............................................................................ 11 2.7 Subgrade and Foundation Preparation ................................. 11 2.8 Pavements ............................................................................. 12 2.8.1 Pavement Design ............................................................... 12 2.8.2 Base course Widths ............................................................ 12 2.8.3 Shoulders ........................................................................... 13 2.8.4 Compaction ........................................................................ 13 2.8.5 Materials ............................................................................. 13 2.9 Kerbing .................................................................................. 18 2.10 Stormwater Drainage ........................................................... 18 2.10.1 General ............................................................................. 18 2.10.2 Common Catchments ....................................................... 19 2.10.3 Recurrence Intervals & Run-off Coefficients ..................... 19 2.10.4 Provision for Flooding ....................................................... 19 2.10.5 Pipe Types ........................................................................ 20 2.10.6 Underground Pipe Systems .............................................. 20 2.10.7 Open Drains ..................................................................... 21 2.10.8 Sub-Soil Drains ................................................................. 21 2.10.9 Drainage Easements ........................................................ 22 2.11 Miscellaneous Facilities ...................................................... 22 2.11.1 Footpaths .......................................................................... 22 2.11.9 Fencing for subdivisions outside of townsites ................... 31 2.11.10 Provision for School Bus Facilities .................................. 32 3. SUBMISSION REQUIREMENTS ..................................................... 33 3.1 General .................................................................................. 33 3.2 Drawings ................................................................................ 33 3.3 Drainage Calculations ............................................................ 33 3.4 Pavement Calculation ............................................................ 33 3.5 Required Drawings ................................................................ 34 3.6 As Constructed Drawing Details ............................................ 35 4. CONTROL & SUPERVISION OF CONSTRUCTION ................... 36 4.1 General .................................................................................. 36 4.2 Responsibility for Quality of Construction .............................. 36 4.3 Schedule of Inspections ......................................................... 36 4.4 Testing & As Constructed Surveys ........................................ 37 1 Attachment A 4.5 Practical Completion .............................................................. 38 5 MAINTENANCE AND RELEASE .................................................. 39 5.1 Survey Release ...................................................................... 39 5.2 Maintenance .......................................................................... 39 2 Attachment A 1. GENERAL REQUIREMENTS 1.1. Where proposals for the subdivision of land in a district include the provision of streets for use by the public, and the proposals have been approved, the owner of the land shall not dispose of it, or part of it or an estate or interest in it, until he has caused those streets to be constructed and drained to the satisfaction of the Council (Section 295 (4) (a) Local Government (Miscellaneous Provisions) Act 1960). 1.2. Any road and/or drains required to be constructed under the preceding section of the Local Government Act, shall be constructed to Council’s requirements. 1.3. The term “Subdivider” shall mean the owner of the land being subdivided. The term “Consulting Engineer” or “Consultant” shall mean the Engineer appointed by the Subdivider to design, document and superintend construction of the works. 1.4. Technical provisions included in these requirements are intended to provide a guide to the standard of work, materials and design required before roads and drains will be certified to the Western Australian Planning Commission as having been made to the satisfaction of the Council. They are not necessarily complete and are not intended to be used as a specification or contract for construction. They may be subject to alteration with the approval of the Works Manager 1.5. The Local Government (Miscellaneous Provisions) Act 1960, Section 295 (6) reads as follows: “(a) Where a person who is subdividing land is by the provisions of this Part required to construct and drain streets shown in the plan of subdivision he may- (i) carry out or cause to be carried out the construction and drainage at his own cost and expense or; (ii) arrange for the Council to carry out the work on his behalf and at his cost and expense (b) Where the person does not make the arrangements with Council, he shall pay to it, on demand, an amount to cover the reasonable costs of the Council in supervising the construction and drainage which amount shall be reckoned as follows: (i) where the person has not engaged a Consulting Engineer and Clerk of Works to design and supervise the construction and drainage the amount shall be three (3) percent of the cost of the construction and drainage as estimated by the Council; 3 Attachment A (ii) where the person has employed a Consulting Engineer and Clerk of Works to design and supervise the construction and drainage, the amount shall be one and one-half (1 ½ ) percent of the cost of the construction and drainage as estimated by Council. (c) The Council may require the person to employ a Consulting Engineer and Clerk of Works to design and supervise the construction and drainage and that person shall, when required to do so by Council, carry out the requirement.” 1.6. The design, preparation of drawings and specifications, and supervision of construction of subdivision works covered by these requirements shall be undertaken by a Consulting Engineer who is a member (or is eligible by way of engineering qualifications and experience to be a member) of the Association of Consulting Engineers Australia. 1.7. The supervision fee referred to in Section 295(6)(b) of the Local Government (Miscellaneous Provisions) Act 1960 shall be paid to Council before construction commences. The amount of the payment shall be based on the estimated cost of all of the works at the time. Upon certification of practical completion of the works, the consultant shall provide the actual construction cost of the works and the amount of the fee shall be adjusted accordingly, if necessary. 1.8. Drawings and specifications for the construction of roads and drains shall be prepared in accordance with Section 3 of these requirements and must be approved by Council’s Works Manager before any work will be allowed to commence. 1.9. All construction work shall be carried out in accordance with the approved drawings and specifications and shall be subject to inspection at various stages of the works by Council’s Works Manager. Final approval of the works shall only be given when the whole of the works have been constructed to the true meaning and intent of the approved drawings and specifications and to the satisfaction of Council’s Works Manager. 1.10. Council’s Works Manager will direct all notices, requests, instructions and approvals to the Consulting Engineer, except in urgent circumstances when they may be given directly to other parties involved in the subdivision. 1.11. After clearance of the diagrams by the Western Australian Planning Commission and the Office of Titles, any land delineated and shown as a new road on such diagrams shall then be under the control of Council subject to the maintenance requirements referred to in Section 5. 1.12. Council is conscious of the need to preserve natural vegetation
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