. Municipal and official handbook of the City of Auckland, New Zealand. iailjour. At the inlet end of the tanks a hrick building iserected in which is installed the screening and detritus-removal plant, compi-ising coarse sci-eens, mechanicallyojjerated fine screens, and a bucket diedge. This plantis driven by a 10 vertical steam engine, with anoil engine as a stand-by. A \alve chamber is built atthe outlet end of the tanks, in wliieli the \alves con-trolling the discharge of sewage aie opei-ated. Tin- main intercejiting sewei-. which has a luling«radi<-nl <.f I in .?{,()()(), is
. Municipal and official handbook of the City of Auckland, New Zealand. iailjour. At the inlet end of the tanks a hrick building iserected in which is installed the screening and detritus-removal plant, compi-ising coarse sci-eens, mechanicallyojjerated fine screens, and a bucket diedge. This plantis driven by a 10 vertical steam engine, with anoil engine as a stand-by. A \alve chamber is built atthe outlet end of the tanks, in wliieli the \alves con-trolling the discharge of sewage aie opei-ated. Tin- main intercejiting sewei-. which has a luling«radi<-nl <.f I in .?{,()()(), is of the standaid ox iform, or egg-shaped section, ranging from 8ft. 6in. by 5ft. Sin. to 3ft.«in. by 2ft. -tin. It is constructed of concrete, iilain andreinforced, and is laid princii)all\ in tunnel with theexception of a length <if 100 chains in Hobson Bay,which is constructed on i-einforced concrete l)ranch sewers are of various sections and grades,and are riicted of concrete and earthenware pipes. •22(1 t i II p MECHANICAL SCREENS: MECHANICAL SCREENS: BACK. ACCKLASJ) MiWlClPAL HAJDBOOK. Koiir i)Uiii|)iiii; stations have been piuvided for thelow-level areas and reclaimed lands on the foreshore ofthe City. The plant necessary foi- the total output ateach station is installed in duplicate, each unit con-sisting of a stei-eo])hagus eenliifugal imiiip, electriciiiotoi-, patent auton)atic coiiti-ollei and Hoat apparatus. During the year ending March 31st, 1921, an avei-agedaily dry-weathei flow of 6| million gallons was recordedat the Orakci works. The gi-eatest quantity dischai-gedin any one day was .^ million gallons, recorded onNovember 22nd, 1015. The Board meets quarteily in the Council Chamber,To\\ri Hall, Auckland. The successive (hairmen of theBoard have been Mr. (afterwards the Hon.) A. , 1908-1909: Mr. C. I). Grey, 1909-1910: Mr. L. ., lOKi-IOIl : aiul Mi, (afteiwards the Hon.) C. , , 1911-1915: the lucsent
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Keywords: ., bookcentury1900, bookdecade1920, bookidmunicipaloff, bookyear1922
