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South Creek - Bank Management Plan

This report has been prepared for Warringah Council to assist in the management of South Creek and to identify the type and scale of works that may be required to secure unstable sections of creek bank and to take these works into account in the hydraulic model representing possible future conditions.

The South Creek catchment covers 7.3km2 of the suburbs of Cromer, Beacon Hill, Narraweena, and Oxford Falls. The source of South Creek is at Red Hill at an elevation of approximately 150m AHD. Wheeler Creek rises at Cromer Heights at an elevation of approximately 110m AHD.

The form of South Creek ranges from bedrock confined in the upper and middle reaches to a fully unconfined alluvial stream in the lower reaches. Many intermediate forms are present between these two extremes. Severe instability in creek planform and channel geometry is limited to a small number of discrete locations but several reaches are characterised by general degradation/retreat of the banks and accompanying siltation along downstream areas. Some of the bank instability noted is due to the sandy nature of the bank soils while in other areas banks had been stripped of most of the vegetation and not stabilised before replanting.

Additional Information

Field Value
Title South Creek - Bank Management Plan
Publication Date 4 February 2008
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Northern Beaches Council
Author/ Prepared by Cardno Lawson Treloar Pty Ltd
Publish date 21 May 2020
Update date 22 May 2020
Approval State Approved
Submitted for approval 22 May 2020
Submitted by Julia Muniz de Miranda Sa
Approved 22 May 2020
Approved by dstazic
Identifier a49a209b-1c08-4e2a-9dad-06f514c065c6