The Old Man Creek Project required the biggest, heavy duty LayFlat gates on the market. State Water was looking for superior engineering design, a high quality product to meet the stringent specification and reliable after service” said State Water Project Manager Mano Manorathan following the successful installation of AWMA’s water control equipment.
Haslin Construction’s $8 million project required three automated LayFlat (tilting) gates, four automated side winding gates, a bulkhead gate and series of stop logs with lifting frame and storage racks.
State Water commented that “AWMA infrastructure will enhance the management of flow releases to meet specific environmental and downstream user needs at times and rates as prescribed”.
The large LayFlat gate leaves are over 5m high x 3m wide, driven by hydraulic actuation. Engineering and quality scrutiny required unique features including 500mmOD cast stainless steel rope drums, 28mmOD stainless steel cables and a Rotork gear box capable of 90,000Nm of torque.
The gates are capable of providing drought relief supply to downstream landholders by means of a lowered sill. Alternatively they can also release bank full flows during targeted environmental watering or flooding.The Old Man Creek Project will raise the weir to control up to 20,000ML/day at Wagga which will result in water savings by reducing evaporation and evapotranspiration of flows along the creek as well as significant environmental and social benefits for overall improvement of the Riverine environment.
The gates on the weir and fishway will be automated via SCADA using the web based, award winning CARM system.