Stormwater Pipe Connection 221 Form

• Minimum pipe diameter is 75mm and maximum pipe diameter is 100mm.

• Maximum number of outlets is one outlet per 10m of frontage. Up to 2 x 100mm pipes may be provided side by side. If more than two 2 x 100mm pipes are required at one location, a rectangular section steel drain must be provided instead.

• Drains must run at between 90 degrees and 60 degrees to the kerb and angled in the direction of the street water table flow.
• All drain outlets must be located a minimum of 0.2 metres from inverts and/or kerb ramps.
• Stormwater drainage connection must be located at least two metres from street trees to ensure that roots are not damaged and root growth will not impact the pipe. For trees of a legislative status, the proximity is to be determined by Council’s Senior Urban Forest Officer.
• Street furniture (Stobie poles, Telstra services, trees, signs, stormwater pits, etc.) may not be removed or adjusted for the purpose of installing stormwater drains, except with the express written approval of the relevant authority and Council’s Assets & Delivery Department.
• If your property is located at a level lower than that of the adjacent road level, property owners are responsible for ensuring adequate stormwater drainage systems (grated drains, pumps, landscaping or on-site stormwater detention, as per Council’s Stormwater Drainage – Building and Construction Policy) are in place to remove water from your property.

Permitted drain types include:

• P.V.C. sewer-grade pipe
• P.V.C. pressure grade pipe class 12 or heavier
• Steel pipe – minimum wall thickness 4mm

Non-permitted drain types include:

• Asbestos Cement
• Concrete (steel reinforced)

• The outlet must be continuous, single length with no leads, bends or joins and adequately sealed at the boundary of the adjoining property.
• Minimum of 25mm cover must be provided over the top of the drain.
• The drain must be laid either level or with fall to the street water-table.
• Concrete kerbing must be saw cut to a minimum of 50mm wider than the drain diameter/width and re-mortared at the stormwater outlet. It is not acceptable to break out the kerbing without cutting first.
• All stormwater surface runoff from the property and buildings must be contained within the property boundaries, collected and overflow discharges to the kerb and water table.
• A steel kerb adaptor may be used to protect the pipe. Please refer to drawing SD120 in the Institute of Public Works Engineering Australasia’s Infrastructure Guidelines SA.
• A steel checker plate may be secured around the stormwater drain for protection if there is no room to reinstate the footpath above the stormwater drainage. The checker plate must be flush with the footpath level and not cause a tripping hazard.

The footpath should be reinstated to match the existing type with a maximum crossfall of 2.5%. The trench must be backfilled with quarry screenings and tamped firmly to achieve a sound, compact base. Reinstatement work must be completed by the applicant to Council’s satisfaction in accordance with the following:

• Asphalt
  Edges of existing asphalt must be saw-cut with a straight and clean edge. A minimum of 30mm compacted thickness layer formed from hot mix asphalt laid at a temperature within 4˚C of supply temperature.
• Concrete
  Edges of the trench must be saw-cut with a straight and clean edge. A minimum of 75mm thickness 20 MPa strength concrete must be suitably compacted and finished to a surface matching existing.
• Paving bricks or blocks
  Reuse existing pavers that are not damaged or match new pavers to existing, including colour and shape. Paving bricks or blocks must be bedded in sand bedding minimum 20mm thick spread on a base of compacted quarry rubble minimum 75mm thick. The trench edges must not be cut to a straight line where pavers need to be interlocked together after construction. Edges must be restrained by a concrete retainer in accordance with established good practice.
• No footpath
  Where no made footpath existed, the surface should be topped with similar material to the existing verge and the surface should be left level, smooth and free from trip hazards.