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21556 Response to Information Request OPW220104
Attached to the e-mail 25 Pavilion St - Response to information Request - OPW22/0104.
DR:NP 21556-2 25th May 2022 Noosa Shire Council PO Box 141 TEWANTIN QLD 4565 ATTENTION: Diogo Carrico RE: 25 Pavilion Street, Pomona LOT 4 RP 35077 – Operational Works OPW22/0104 Response to Information Request We refer to the above Operational Works Application and the information request issued by Council dated 13th May 2022. In response, please find attached the following documentation. • Tod Consulting Drawings 21566-C000-C500 & SWCLC • Detailed Electrical & NBN Drawings by Ampflo Regarding the specific issues raised we provide the following comments: Issue The submitted documentation includes a concept plan for the proposed electrical works but no plans have been submitted regarding the proposed streetlighting. 1. Information Required Provide detailed plans of the proposed streetlighting for the new road in accordance with the relevant standards. Response Preliminary electrical and NBN design plans attached, which includes locations for the proposed streetlights. Issue Condition 32 of the higher order approval RAL21/0017 reads as follows: “Stormwater entering the 3-metre-wide easement adjacent to the southern boundary must be directed to the waterway, the works must be undertaken in accordance with an Operational Works approval.” The submitted plans do not indicate any stormwater works in this area.
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2. Information Required Provide amended plans detailing the works required to comply with condition 32 of the higher order approval RAL21/0017. Response A swale drain is shown within the 3m easement along the southern boundary – refer section A in bottom left corner of drawing 21556-C100 rev C. This conveys any overland flow around the building pad for lot 10. The outlet will be shaped to direct flows away from the boundary towards the centre of the subject lot. Issue Condition 36 of the higher order approval RAL21/0017 requires that residential driveways must be constructed to proposed Lots 4, 5, 6 and 10. The submitted plans do not propose the construction of any residential driveways. 3. Information Required Provide amended plans demonstrating compliance with condition 32 of the higher order approval RAL21/0017. Response Driveways for lots 4, 5 & 6 have been added to the drawings. These have been positioned on the western side of these lots as this is the likely location for a garage to be constructed to block out the western sun. The driveway for lot 10 is unchanged. Issue Condition 38.a. of the higher order approval RAL21/0017 reads as follows: “a 2 metre wide footpath within one side of the new road’s verge for the entire length of the new road, connecting to the existing footpath on Pavilion Street – the footpath’s width can be reduced (to a minimum of 1.5m), only in locations where a 2m wide footpath would create a mismatching of levels with existing properties (i.e. 23 Pavilion St)”. The submitted plans propose the construction of a 1.5m wide footpath throughout the entire development. 4. Information Required Provide amended plans demonstrating compliance with condition 38.a. of the higher order approval RAL21/0017.
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Response The footpath width has been increased to 2m wide west of the existing property along the frontage of the new lots. Issue It is not clear that all lots achieve a minimum 1% fall towards the internal road. 5. Information Required Demonstrate that all the lots achieve a minimum 1% fall towards the internal road. Alternately, provide amended plans detailing an inter-allotment drainage system for the lots. Response Minor earthworks shaping has been added to lots 1 & 2 (similar to approach taken with lots 8 & 9) to provide 1% fall towards the new internal road. The natural slope towards the west has generally been maintained with this proposed shaping. Roof water from houses on these lots can free drain to the street via pipes connected to the proposed kerb adaptors. Issue From the review of the SWMP and the OPW drawings, it seems that the overflow pit for the bioretention basin needs to have a sealed lid in order for the detention function to work as modelled. 6. Information Required Provide confirmation that this is the case and update the plans as necessary. Response Peak Urban (authors of the SWMP) have confirmed that the outlet pit in the bioretention basin needs to have a sealed lid. Drawings have been amended accordingly to reflect this requirement. Issue The submitted documentation, indicates that the ESC plan and the sizing of the sediment basin are based on a catchment area which excludes the 2 existing properties.
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7. Information Required Update the ESC plan and the sizing of the sediment basin so that the basin size is based on a catchment area which includes the 2 existing properties which will also drain to the internal road. Response The type B HES sediment basin has been increased in size to include the catchment from the 2 existing properties fronting Pavilion St. Details are shown on drawing 21556-C100 Rev C. It is intended that the sediment basin be retained at the end of the works, and modified as required, to form a farm dam on lot 10 (balance parcel). This has been noted on the drawings. Use of alternative to Reinforced Concrete Pipes Our drawings specify the use of class 2 reinforced concrete pipes (RCP’s) as per Council design standards, however given the current lead time for supply of RCP’s is currently in the order of 32 weeks we seek Council’s approval to substitute the RCP’s with either StromPRO (by Vinidex) or Enviropipes. These pipes are made from corrugated polypropylene and HDPE respectively and have been used on many subdivisions in both Gympie and Sunshine Coast regions over the past 12-18 months due to supply issues with RCP’s. Links to the suppliers’ websites are provide below for your information. Your support for the use of either of these two products would be appreciated. We understand that similar pipes are being installed on Council’s Noosa Parade upgrade project currently under construction. https://www.vinidex.com.au/technical-resources/pro-and-flo-systems/ https://www.enviropipes.com.au/~enviropipes/index.php/storm-water-pipes/overview We trust the above is satisfactory. Should you have any queries regarding this matter, please contact the undersigned. Yours faithfully, Doug Reynolds, Director 07 5449 9600 | [email protected] TOD consulting engineers