CONTENTS - Central Public Works Department

364 APPENDIX 4
PROFORMA 3-B OF APPENDIX - 4
CENTRAL PUBLIC WORKS DEPARTMENT
No. Dated, the
The Executive Engineer,
..........................................
Name of Work: ..........................................
Kindly furnish the following information for the above work of Water Supply Scheme as early as
possible in order to enable this office to prepare project estimate for the same.
1 (a) What is the area in acres to be served by the Scheme?
(b) Present population to be catered for
(c) Probable population after 20 years to be catered for
(d) Per capita water supply required by the sponsoring authorities or Municipal bye-laws.
2 (a) Site plan of the area for which water supply is required showing the buildings to be served, with
spot levels at 60m intervals. The plan should show the layout of the buildings, main roads, service
roads etc., and ground formation levels alongside of all roads shall be given at intervals of 60m.
(b) If it is anticipated that any additional areas are to be covered in this scheme at any future date,
these should be marked in the plan and the requirements given.
3. State if there is any existing filtered water supply in the area or in the vicinity. If so, furnish the following
particulars:
(i) A key plan showing the area to be served, and the nearest main from which water is proposed to
be tapped, and the point of tapping.
(ii) State the size of the main, and if it is adequate to cater for the additional supply required for the
project.
(iii) Pressure available in the main at the proposed point of tapping, and the reduced level of the main
at this point.
4. If supply is to be taken direct from the storage reservoir, give the following details:
(i) Site of the reservoir with reference to the site to be developed for water supply and distance from
site.
(ii) Capacity of the reservoir.
(iii) Whether it is capable of meeting the extra demand in the worst summer?
(iv) Reduced level of the reservoir floor and depth of water in reservoir.
(v) Longitudinal sections of the proposed alignment of the main from the reservoir to the site, with
nature of soil and sub soil.
5 (a) If there is no water supply in the area, how do you propose to provide water supply:
(i) From open or tube wells for smaller groups of buildings or colonies.
(ii) From any existing perennial sources of water supply, e.g. river, stream, canal etc. Give the
details of dry weather and monsoon flow, low water level and RFL etc. Give details of weirs,
if any required for heading up water in the stream, arrangements for purification, location of
intake well, filter beds, pumping station etc. Also give an index plan showing the recommended
location of water works.
(b) Indicate the size and depth of open or tube wells, expected supply per hour and approximate cost
of the installations including cost of delivery main upto site.
6. In case storage or service reservoir is required, possible location of reservoir to be indicated on an
index plan along with the ground levels at the site. In case a high level reservoir is to be constructed,
local restriction regarding maximum height due to proximity of air field, if any, may be indicated.