Projects with a value between R50 million and R250 milion
WINNER COMMENDATION
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Hatch for Midmar Water Treatment Works Upgrade, Howick
ocated in Howick, the Midmar
of 250 Mℓ/day to 395 Mℓ/day on a raw water
Water Treatment Plant (WTP) is
intake basis. The plant utilises chemical
owned and operated by Umgeni
dosing, super pulsators and rapid gravity
Water. The plant treats raw water
sand filters, with disinfection using chlorine
from Midmar Dam, which is located on the
gas for the production of 375 Mℓ/day of
upper Umgeni River system.
potable water.
PROJECT TEAM
Client: Umgeni Water Consulting engineer: Hatch Main contractor: Icon Construction
The project required upgrades to the
Safety enhancements included the addition
Mpophomeni, most of the south-western
chemical dosing system, an additional
of ventilation equipment to the filter gallery,
and southern suburbs of Pietermaritzburg,
new super pulsator clarifier and six new
as well as structural modifications around
Greater Edendale, Vulindlela, Thornville,
rapid gravity sand filters at the main
the filter syphon valves. In turn, the addition
Hopewell, Richmond and the Umlaas Road
water treatment works, as well as a new
of a second backwash water balancing tank
node. It also serves eThekwini’s Outer
backwash water recovery tank, two new
ensures improved recovery of wash water,
West area (including the areas of Cato
clariflocculators and a gravity thickener
enhancing the overall efficiency of the
Ridge, Georgedale, Gillitts and Hillcrest),
at the sludge treatment works, with
treatment system and the quality of water
as well as consumers on the Lion Park and
associated mechanical, electrical, control and
returned to the natural environment.
Eston-Umbumbulu pipelines from the
instrumentation upgrades and integration.
The WTP supplies water to Howick and
Umlaas Road node. The supply area has
Hatch was awarded the professional
The emergency chlorine scrubber (ECS) design was subjected to critical design
recently been extended via eThekwini’s
services contract for the design, construction
reviews to ensure that it met major
Western Aqueduct.
monitoring and commissioning, with
hazardous installation and client safety
construction commencing in May 2015 and
requirements. The ECS is believed to be the
completed by June 2019.
largest of its type in South Africa.
The Midmar Water Treatment Plant was upgraded from a design operating capacity
C E S A A o n E n g i n e e r i n g E x c e l l e n c e Aw a r d s 2 0 2 0
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