OFFICE OF SURVEYOR GENERAL
ESTIMATE OF THE EXPENSE NECESSARY TO BE INCURRED
Culverts &C.
PLAN OR DESCRIPTION.
The services undertaken upon this authority comprise general repairs and cleansing of culverts, drains, and catchpits under the charge of Inspector.
L. The cleansing of silt, stones, or material washed into the drains from the hills or from adjoining newly made roads, all of which suffer considerably until the surface becomes consolidated. This is especially true in dry seasons when the absence of water to bind the soft surface material means that after a three or four months' drought, a shower of rain falling at the rate of from half an inch to an inch per hour acts upon the sun-hardened surface exposed by cutting for building areas, naturally causing a considerable amount of silt.
This is reduced year by year as our works of drainage and surface stability are brought to their ultimate limit in one district, viz., the hillwards, as it has done in one district bounded by Robinson Road.
The works arranged for the prevention of stones entering drains (washed down the slopes by excessive velocity of the currents) have been effective during the last two seasons.
Approved, W. G. Mercer
(signed)
Octing Governor.
Forward
56
764
764
131
$
(Ar
OFFICE OF SURVEYOR GENERAL ESTIMATE OF THE EXPENSE NECESSARY TO BE INCURRED
Culverts &C.-
PLAN OR DESCRIPTION.
L
The services undertaken upon this authonply of 54 comprice genual repairs and cleansing semunder
of a street or over an area
4 for dry
day
300
inkason 128@/20 120
144
J
of silt stones or material washed into the drains from
the works carried on in
the ne the hills
eighboutions of Inspector or from
adjoining, all newly made roacances 310 suffer considerably sintil the surface becomes conssh days (@ /20 and this it is impossible to effect in dry seasons from oply of 5 men entice absence of water to bind the soft candyman ay extra for frequently after a three or four months draught the for shower of
of rain falls at the.
at the rate of from half an inch presses at B inchan hour and this acting upon the sunhardened month
exposed by cutting for the area pay forma of a lite for building, naturally causes no ingen flords siderable an amount of cilt, this is reduced.
yearnights probably 50. perfect our works of drainage and daring cantand lity is brought to its ultimate limit in one desse. fronder ion, viz hillwards, as it has done in one district and mouths bounded
ted by Robinson Road.
The works arran
anged for the prevention of Eat - probable 160. - stones entering drains (wathed down the savines & excessive velocity of the cuments) have been effective during the last two seasons, in which
Arcei
great as we;
--
Approved, W. G. Mercer/
(signed)
Octing
Governor.
deafront
transport of came
Forward
56
764
764.
131
耀
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