CONTENTS - Central Public Works Department

APPENDIX 2
Part II - Materials
19. Requirements of different sizes/type of pipes and specials and method of procurement.
20. Requirements of pig lead.
21. Have requirements of pumps and accessories been determined in consultation with the Electrical
Engineer? Give details.
22. Requirements of other materials/tools and plants.
PROFORMA – 3 OF APPENDIX 2
UNFILTERED WATER SUPPLY
1. Name of the project
2. (a) Reference to administrative approval and expenditure sanction and their amounts
(b) Provision for unfiltered water supply
(c) Provision for ancillary works such as overhead reservoirs, pumps, etc.
3. (a) Amount of detailed estimate
(b) Rate per sqm in the detailed estimate and how it compares with provision in administrative approval.
Part I – Engineering Appreciation
4. Total area of development scheme.
5. Area of grassy lawns.
6. Basis of working out requirement of water needed for horticultural purpose.
7. Source from which the unfiltered water is proposed to be tapped.
8. (a) Is the water suitable for horticultural purpose ? Has this been ascertained from laboratory tests ?
(b) Degree of salinity if the water is saline.
9. If supply is proposed to be from existing unfiltered/filtered water mains,
(a) Have the mains got the capacity to supply the required quantity ?
(b) Is the pressure in the existing mains enough to serve the area.
10. If the source of supply is from wells/tube wells indicate :
(a) Possibility of pumping from existing open wells; if any.
(b) Feasibility of digging open wells.
(c) Possibility of putting tube wells, if open wells are not suitable.
(d) Exploratory work done earlier in the proximity of the area to determine feasibility of providing wells/
tube-wells.
11. Have the development/layout proposals been approved by local authorities?
12. Formula adopted for designs, value of coefficient of rugosity adopted in designs.
13. Layout of mains:
(a) Closed ring pattern or tree type with dead ends.
(b) Reason for choice
(c) Minimum head available in the distribution system and is it suitable?
(d) In case fire hydrants have been provided in unfiltered water lines, has the Chief Fire Officer been
consulted with regard to the number of fire hydrants, their location and type?
14. Capacity and design particulars of overhead tanks, sump wells, pumps, etc.
15. Have adequate provisions of sluice valves, reflux valves, air valves, scour valves been made?
16. Have the line been taken sufficiently deep to keep the sluice valves spindles flush with the ground
level?
17. Has provision been made for laying the pipeline or digging the trenches under sub-soil water level?
18. Is cutting through rock involved?
19. Has provision been made for crossing road and nallahs, where necessary?
20. Are there any obstructions such as transmitting station, aerodrome, etc. which necessitate diversion?
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