2 Emerald SWMP 2213_Rev1

                                                                                 Callaghan & Toth

1.       INTRODUCTION

The site subject to this report is at No.2 Emerald Street Cooroy. One existing house and
shed on the lot has been removed to be replaced by a commercial building and carpark.

The stormwater management assessment undertaken in this project considers the increase
in impervious area of the lot due to the proposed commercial building and carpark. Then it
determines which measures can be incorporated into the design to attenuate the resultant
increase in runoff back to predevelopment levels.

The existing dwelling catchment drains to Emerald Street.

The existing dwelling site currently drains to Emerald Street as shown on Figure 1.1. the
proposed new drainage system will replicate the existing catchment. An existing roof water
outlet from an adjacent property will be incorporated into the interlot drainage system.


1.1      Response to Conditions of Approval

TABLE 1.1: Response to Information Request
 NUMBER CONDITION                                                         RESPONSE
 5.1         The design levels for the various structures                 Details shown on Figure
                                                                          1.2
 5.2         The discharge rates at the kerb and channel outlets.         Details shown on Figure
             Please note that the maximum discharge at any one            1.2
             location is 25l/sec
 5.3         Clarification on the pipe type within the road reserve.      Details shown on Figure
             Please note that the pipe type must be suitable for use in   1.2
             the road reserve
 5.4         Demonstrate that the proposed stormwater system will be      Details shown on Figure
             able to convey the stormwater generated by the new           1.2
             development on a 20% AEP event
 5.5         RPEQ certification that the design is in accordance with     Figure 1.1 & 1.2
             the Noosa Plan and QUDM                                      SWQMP plans attached
                                                                          are signed by RPEQ
                                                                          and are certified to be in
                                                                          accordance with The
                                                                          Noosa Plan and QUDM


2.       DESCRIPTION

The site is on a 1,012 m2 parcel of land which has frontage to both Emarald Street and
Wimmers Lane. There is an existing underground drainage system with a kerb and a
channel in Emerald Street. A property in Wimmers Lane discharges roof water onto the site.


3.       FLOODING

The existing house drains toward Emerald Street. The downpipes discharge into an existing
kerb and channel in Emerald Street.




Hafner                             2213 SWMP_Rev1.docx                               July 2022   4
2213