AND SEWERAGE TRUST
BY
The Hon. CLIVE PHILLIP STONEHAM. m.la
(MINISTER OF WATER SUPPLY)
At Ballan. Victoria
December 15th, 1954
PROGRAMME
15/12/1954
Cr. W. H. EOFPEY
President, Shire of Ballan.
Mr. J. W. CARR
Chairman, Geelong Waterworks and Sewerage Trust.
Mr. J. M. MACINTYRE
Engineer-in-Chief, Geelong Waterworks and Sewerage Trust. Mr. H. W. McCAY
Deputy Chairman, State Rivers and Water Supply Commission.
Mr. L. F. a D’ARCY, M.L.A.
The Hon. the Minister of Water Supply C. P. STONEHAM, Esq., M.L.A.
/
. •
GEELONG WATERWORKS AND SEWERAGE TRUST
J. W. CARR, Esq., J.P., Chairman B. E. PURNELL, Esq., M.B.E., J.P., Vice-Chairman - City of Geelong F. H. WALLACE, Esq., O.B.E., J.P. - City of Geelong G. NEUNHOFFER, Esq. - City of Geelong West N. M. FREEMAN, Esq. - City of Newtown and Chilwell A. S. THOMSON, Esq. - Shire of Corio R. E. GORELL, Esq. - Shires of Bellarine and South Barwon
Engineer-in-Chief : Secretary :
J. M. MACINTYRE, M.B.E., B.Sc., M.I.E., Aust. B. C. HENSHAW, A.A.S.A., A.C.I.S.
Assistant Engineer-in-Chief : Assistant Secretary :
A. W. COOKE, A.I.M.E. Aust. S. W. BIRRELL
Project Superintendent - Bostock Reservoir :
V. SEITZ
mm
VIEWS OF SITE
PRIOR TO COMMENCEMENT
OF PROJECT
The proposal to construct a dam on the Eastern Moorabool River, below its junction with the Paddock Creek, was first made in 1923 by Mr. J. S. Sharland, who was then the Trust’s Engineer-in-Chief. Designs were prepared and approved by the Government and preparations were made to commence construction.
The Commissioners of the Trust decided to call the dam The Bostock Dam, in honour of Mr. T. E. Bostock, a former Mayor of the Town of Geelong and one of the prominent citizens who had been responsible for the formation of the Trust.
The construction of the Bellarine Water Supply System by the State Rivers and Water Supply Commission, however, caused commencement of work to be postponed, and the project remained in abeyance until it was revived in 1946 by the then Chairman of the Trust, Mr. N. M. Freeman.
/
The plans and proposals were re-examined by Mr. R. G. Pearce, Engineer-in-Chief, and a new site was decided upon, half a mile down-stream from the original site.
New designs were prepared and approved by the Government on 19th June, 1953.
A tunnel was first constructed, to divert river water away from the site of the dam. This was completed, and the river was diverted on 15th December, 1953.
On the same day excavation of the foundations of the main embankment in the river bed was started.
The main embankment attains a height of 84 feet at its maximum and is designed to impound 1,500,000,000 gallons.
The spillway capacity is 24,000 cusecs, while the aqueduct can transmit 5 million gallons of water per day from the dam to the city.
MOORABOOL RIVER IMPOUNDED
CONTRACTORS OFFICE & WORKSHOPS
CLAY EXCAVATED FOR SPILLWAY APPROACH AND USED IN EMBANKMENT CONSTRUCTION
|
si® | ||
DIVERSION INLBT & CHAMBER
%
%
%
Access ROAD
DIVERSION
OUTLET
INVESTIGATING BASALT OVERLYING SANDSTONE FORMATION FOR ROCK FILL
Length of Tunnel including Gallery.......- 930 feet
Volume of Excavation for approaches ------- 11,500 cub. yards
Volume of Tunnel Excavation through sandstone and shale - - 1,434 cub. yards
Volume of R. Concrete in Tunnel Lining.....- - 1,113 cub. yards
COST—£47,100
FLOOD DISCHARGE AFTER COMPLETION OF TUNNEL AND DURING CONSTRUCTION OF DAM
EXCAVATION OF TUNNEL ENTRANCE
FIRST STAGE OF CONSTRUCTION Clearing Site of Embankment
3rd STAGE
Concrete Core Wall Completed
Compacting Clay Inner Zone, Transition and Rock Zone Visible
4th STAGE
Bank at Full Supply Level showing Upstream Rip Rap
CONTRACTOR—Thiess Bros. (Vic.) Pty. Ltd., Brisbane, Queensland
MAIN EMBANKMENT :
Volume of stripping from Embankment seat and quarries - -
Volume of clay in Inner Zone - -- -- -- -
Volume of sand in Transition Zone ------Volume of rockfill Zone (Sandstone) ______
Volume of Igneous Rock Rip-Rap ------Volume of concrete in cut off wall ------SUBSIDIARY EMBANKMENT :
Volume of stripping from Embankment seat - - - - -
Volume of clay in Inner Zone - -- -- -- -
Volume of sand in Transition Zone ------Volume of Igneous Rock Rip-Rap ------SPILLWAY :
Volume of excavation - -- -- -- -- -
Volume of concrete ---------
COST—£110,000
|
64,200 cub. yds. | |
|
47,700 „ |
99 |
|
17,600 „ |
99 |
|
81,600 „ |
99 |
|
7,700 „ |
99 |
|
600 „ |
» |
|
5,000 .. | |
|
20,000 „ |
99 |
|
2,000 „ |
99 |
|
3,000 „ |
99 |
|
78,000 „ |
99 |
|
1,600 „ |
99 |
PLACING
SUBSIDIARY EMBANKMENT INNER ZONE
CONTRACTORS—Messrs A. and F. McLean, Norlane, Geelong'
Length of pipes laid in trench - - 11,365 feet
Length of channel excavated - - - 21,000 feet
Length of tunnel excavated and lined - 1,496 feet
Volume of concrete in structures - - 300 cub. yds.
Length of fencing along channel
section ------- 42,000 feet
COST—£60,750
CHANNEL EXCAVATION AND PIPES AT TUNNEL APPROACH
Length of 30 inch diameter R.C. Pipes.....- - - -
Length of 24 inch diameter R.C. Pipes - -- -- -- -
Length of 15 inch diameter Steel Concrete Lined Pipes - - - - -
Number of special steel fittings -----------
Valves—2 only 18 inch diameter :
400 feet 2,200 feet 7,900 feet 1,056 feet 100 feet 56 No.
3 No.
All pipes and fittings fabricated by Humes Ltd. 18 inch diameter valves were made by Orton and Burns Pty. Ltd., Melbourne, whilst the 12 inch diameter valve was made by M. B. John Ltd., Ballarat.
COST—£21,550
No. 2 SIPHON BOSTOCK AQUEDUCT
WORK EXECUTED BY—Country Roads Board of Victoria COST—£10,100
1. Supply of Pipes - -- -- -- -- -- £21,550
2. Construction of Bostock Aqueduct ------- £60,750
3. Diversion Tunnel - -- -- -- -- -- £47,100
4. Construction of Main Embankment, Sudsidiary Embankment and
Spillway ----------- £110,000
5. Raising of Highway Bridge over Paddock Creek ----- £10,100
6. Acquisition of Land £24,000
7. Cement, Fencing Materials, Electrical Installation, Reinforcing Steel
and other items supplied on site by Trust ----- £17,500
8. Preliminary Investigations, Engineering Surveys, Borings, Designs,
Fees, Supervision and Administration - - - - - £21,000
£312,000
TOTAL EXPENDITURE
1