About Us

Grant Witheridge Grant Witheridge is the principal of Catchments & Creeks Pty Ltd, and a leading authority in Hydraulics, Stormwater Management, Waterway Management, and construction site Erosion & Sediment Control.

Grant has over 35 years experience in the investigation, modelling and design of hydraulic structures, including 7 years at the University of NSW Water Research Laboratory. Grant has both a Degree and Masters in Civil Engineering from the University of NSW.

In the early 90s Grant worked for Brisbane City Council and was involved in the design of stormwater systems, floodplain management and creek restoration. In the late 90s Grant worked for Griffith University in Brisbane as a part-time lecturer and consultant. Currently Grant is working as an engineering consultant through his own company Catchments and Creeks Pty Ltd.

Grant is the principal author of more than 30 technical publications including IECA Australasia’s (2008) Best Practice Erosion and Sediment Control documents, the 2007, 2013 and 2016 editions of the Queensland Urban Drainage Manual (QUDM), and publications on creek erosion, creek rehabilitation and fish passage.

During the period 1995 to 2017, Grant conducted 580 training courses on various topics attended by some 9,700 participants. In 2009 Grant was presented with the inaugural 'Neville Gibson Award' for services to the stormwater industry by the Queensland Branch of the Stormwater Industry Association. In 2010 Grant was honoured with the 'Sustained Contributor Award' for 2009 by the International Erosion Control Association (USA).