Construction of a Stormwater Detention Facility, Playground and Landscaping

Overview The Hills Shire Council is seeking lump sum tenders from suitably qualified contractors for the construction of a stormwater detention facility, playground and associated landscaping works at Blinkhorn Circuit Reserve. The Contractor will be responsible for the works in its entirety. Purpose The project aims to improve stormwater runoff quality and quantity control, enhance local flood mitigation, and provide improved open space outcomes for the surrounding community. Scope The proposed basin is a dry basin with an approximate volume of 1030 m3 and an average weir length of 8 metres, designed for the 100yr ARI (1% AEP) event. The eastern extent of the Reserve along Halloway Boulevard is proposed to include a small playground area and kick-about space approximately 15 metres wide by 40 metres long, with either two (2) pieces of play equipment or one small play structure/unit, softfall, a shelter with picnic table, seating, and a tap/bubbler. The Contractor shall provide all services required to satisfy the overall project objectives in accordance with the Blinkhorn Circuit Reserve Stormwater Basin Detail Design Drawing No 304001465 (revision 3), the Blinkhorn Circuit Reserve Stormwater Basin Construction Environmental Management Plan, the Sydney Water Conditions and Requirements (Constructor Minor Works), the Blinkhorn Circuit Reserve Stormwater Basin Vegetation Management Plan, and the Blinkhorn Circuit Reserve Stormwater Basin Review of Environmental Factors. The scope includes, but is not limited to: Site establishment (mobilisation and set up) Control of traffic, including provision of approved Traffic Management Plans to facilitate construction of the works Dilapidation report preparation pre and post construction Underground services search and location, and protection of public utility services Site set-out by a registered Surveyor Liaison with and coordination of all sub-contractors, government agencies, the Principal, and the Superintendent (Project Manager) Earthworks including clearing and grubbing, removal and stockpiling of topsoil, excavation of cuttings, placing of general fill, offsite disposal of spoil material as required, and placement of selected material Supply and installation of reinforced access ramps Provision for control, protection and safety of traffic during construction Installation and removal of measures necessary to ensure public safety during construction Preparation and submission of a site specific Project Management Plan, including a WHS Management Plan, Construction Environmental Management Plan, and Sediment and Erosion Control Plan Installation and removal of Sediment and Erosion Control measures Control measures to retain and/or divert stormwater Site preparation, including protection of built form, services and vegetation including trees and root zones Engagement of a site Arborist/Ecologist to provide a pre-clearance survey and direction/guidelines during construction to mitigate impact on fauna Tree protection and removal as nominated in the design plans Excavation associated with basin construction works Stockpiling and maintenance of site soils for beneficial use Supply and installation of geotextile fabric in accordance with design details and specification Construction of the stormwater basin and embankments, including supply, placement and compaction of site and imported clay fill Construction of basin spillways complete with rock armour scour protection Construction of stormwater pipes and headwalls Construction of footpath, including connecting side street footpaths and all associated works required Construction of a kick-about area as per the design Supply and installation of a picnic shelter, table and setting, bench seating, and bin stand holder Supply and installation of a new removable, lockable steel bollard Supply and installation of play equipment Appropriate disposal of waste materials, including site soils, vegetation and other materials Landscaping and vegetation works in accordance with the vegetation design drawings, technical specifications and planting schedule Revegetation and landscaping of exposed new works and areas disturbed by construction activities Six (6) month establishment period maintenance Measures associated with conditions specified by Sydney Water All other work necessary or incidental to the contracted works, together with associated coordination and supervision General Work, Health and Safety precautions Final clean up and restoration of work areas, including removal of all redundant materials from site Supply and installation of flood warning signs Preparation of work-as-executed survey and plans in DWG and PDF format Site dis-establishment The playground scope includes a play area containing two (2) pieces of play equipment or one small play structure/unit, softfall, a shelter with picnic table and seating. The Contractor is to allow for the supply and installation of a play unit, slide and a swing set (with adult and toddler seat) as a minimum, with installation of new play equipment and surrounding softfall surfacing (playground mulch, wetpour rubber, or a combination of these). Contractor Requirements Suitably qualified contractors are required for the construction works All landscape work must be carried out by a registered landscape contractor who is a member of the Landscape Contractor Association of NSW (LCA), or an appropriately qualified and experienced contractor All playground equipment and softfall surfacing must be compliant with current Australian Standards Timber will not be accepted as a suitable material for play equipment