108” X 96” RODNEY HUNT INLET SLUICE GATE REHABILITATION
REGIONAL MUNICIPALITY OF DURHAM DUFFIN CREEK W.P.C.P. RAW SEWAGE LIFT STATION
Date of Job: OCTOBER 2010


Dewatering the gate prior to gate leakage inspection by a diving team October 2008.

Scope of work September 2010

  1. Install temporary steel bulk head gate to isolate the damaged Rodney Hunt sluice gate.
  2. Replace the existing stem and all stem guide wall brackets.
  3. Fit and install a new flush bottom seal assembly across the bottom of the gate slide.
  4. Adjust all gate wedges and verify gate slide and frame horizontal seating faces are properly aligned.

A section of seal retainer bar retrieved by diving team 2008

The machine bolts securing the
bronze retainer bar and the rubber seal across the bottom of the slide had failed, causing serious leakage between the bottom of the slide and a separated rubber seal.

Supporting the stem to ensure straightness
during the welding process A stem guide wall bracket during the fitting and assembly process
First weld pass on 3.500” diameter type 316 stainless

Andrew guides the upper stem section down through the pedestal to avoid damage to the acme threads

Rob controls the descent of the stem as it approaches the threaded coupling previously assembled on the lower section.

A modified single acme left hand thread with 2 T.P.I. on 3.500” diameter stem

A view of central area under the gate with slide in an open position.

Detail of two piece seal retainer bar bolt hole layout at centre of the gate slide

The temporary steel bulk head gate is visible on the back side of the opening. The bulkhead will be removed once the slide has been closed and the static head equalized on both sides of the gate.
This Rodney Hunt gate is thirty three years old and it remains an extremely fine example of sluice gate engineering.( 108” x 96” )

Michael Grealey, Gate Tech Industries Inc.