FRIDAY, JULY 13, 1990
5
$157M EFFLUENT TUNNEL CONTRACT AWARDED
THE DRAINAGE SERVICES EFFLUENT TUNNEL
A $157 MILLION CONTRACT WAS AWARDED BY DEPARTMENT TODAY (FRIDAY) FOR THE CONSTRUCTION OF AN AS AN INTEGRAL PART OF THE TOLO HARBOUR EFFLUENT EXPORT SCHEME,
DEPARTMENT, MR FIRM
THE CONTRACT WAS SIGNED BY THE DIRECTOR OF THE
OF THE CONTRACTOR, AN ITALIAN K.T. KUO, AND REPRESENTATIVES OPERATING LOCALLY.
THE EFFLUENT EXPORT SCHEME IS BEING IMPLEMENTED AT AN ESTIMATED
ΤΟ $873 MILLION AS THE GOVERNMENT'S COMMITMENT
THERE HAS BEEN EVIDENCE
LEADING TO CONCENTRATION,
IN
COST OF POLLUTION
TOLO PROGRESSIVE INCREASE FORMATION OF "RED TIDES".
WHERE HARBOUR
IN
NUTRIENT
REDUCE
OF
A
THE
SHA
AT PRESENT, TREATED SEWAGE EFFLUENT IS DISCHARGED FROM THE TIN AND TAI PO SEWAGE TREATMENT WORKS INTO TOLO HARBOUR, THIS HAS BEEN ONE OF THE NUTRIENT SOURCES TO THE NEARBY WATERS.
SCHEME HAS BEEN TO REMEDY THE SITUATION, THE EFFLUENT EXPORT
OF THIS SOURCE REMOVE
то NUTRIENT LOAD DESIGNED TO TOTALLY
THE WORKS то THE HARBOUR BY EXPORTING EFFLUENT FROM THE TWO TREATMENT VICTORIA HARBOUR VIA KAI TAK NULLAH FOR DISCHARGE.
THE FINAL TREATED THIS WOULD REQUIRE THE INTERCEPTION OF ALL
CONSTRUCTION OF SEWAGE EFFLUENT FROM THE TWO TREATMENT WORKS AND THE
PIPELINE, SUBMARINE PIPELINE, AND A SERIES OF PUMPING STATIONS,
A
TUNNEL FOR EXPORTING THE EFFLUENT TO KOWLOON.
AND
THE CONTRACT WAS THE TUNNEL FOR WHICH
SIGNED TODAY IS OF DRIVEN BORE AND CONCRETE LINED TYPE, MEASURING 7.5 KILOMETRE LONG 3.2 METRE IN DIAMETER.
TREATED EFFLUENT THE FIRST CONTRACT SIGNED FOR
IT WILL RUN UNDERNEATH TATE'S CAIRN TO CARRY FROM SHA TIN TO DIAMOND HILL AND IS STAGE I OF THE SCHEME.
THAT TUNNEL EXCAVATION ONE UNIQUE FEATURE OF THE CONTRACT IS
BY A TUNNEL BORING MACHINE AND WILL BE CARRIED OUT CONVENTIONAL DRILL AND BLAST METHOD,
NOT BY
THE
FIRST TIME
THIS IS THE
THAT SUCH A MECHANISED EXCAVATION HAS BEEN USED ON A GOVERNMENT CONTRACT IN HONG KONG.
METHOD
OF
APART
FROM SOME INITIAL ESTABLISHMENT TUNNELLING METHOD WOULD AVOID LARGE SCALE USE CONSEQUENT ABSENCE OF ASSOCIATED VIBRATIONS IN WORKS.
WORKS,
THE NEW
OF
THE
EXPLOSIVES WITH A VICINITY OF THE
/ALSO, THE