Taken from an agreement between Local Council and the Minister for Lands and Works this document talks about joining Lachlan Park to the new New Norfolk Sewerage system and abandoning the old system which runs under Burnett Street.

“AN AGREEMENT made the 18th day of June one thousand nine hundred and forty-one between THE HONOURABLE THOMAS HENRY DAVIES being and as the Minister for Lands and Works for the time being in the State of Tasmania (hereinafter called “the Minister”) of the one part and THE WARDEN COUNCILLORS AND ELECTORS OF THE MUNICIPALITY OF NEW NORFOLK (hereinafter called” the council”) of the other part WHEREAS for many years past the sewage from Lachlan Park Hospital (hereinafter called “the hospital”) at New Norfolk in Tasmania owned and controlled and managed by the Crown under the Mental Diseases Hospital Act 1858 has flowed through a drain beneath Burnett-street (hereinafter called “the drain”) and has been emptied into the River Derwent at New  Norfolk aforesaid AND WHEREAS the council has recently undertaken the construction of a modern sewerage scheme for the Town of New Norfolk and it is desirable for reasons of health and sanitation that the sewage from the hospital be emptied into the sewers so to be constructed by the council and that the use of the drain for the passage of sewage be for ever afterwards abandoned”

 Government agreement, document (full) 1941

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