Brief description about this project

1. VISVODAYA ENGINEERING
COLLEGE
A TECHNICAL SEMINAR ON
POLAVARAM PROJECT
BY
P.HARISH
154N1A01A4

2. INTRODUCTION
• Polavaram is a multi-purpose project irrigation
project which is under construction and located on
river Godavari near Ramayyapet village of polavaram
Mandal of West Godavari district in Andhra Pradesh
• This project is a dream for the people of Andhra
Pradesh
• The project will be a one-stop solution for all the
water needs of the state.

5. COMPONENTS OF THE PROJECT
HEAD WORKS
1. Spillway with radial gates
2. Earth cum rock fill dam (ECRF)
3. Coffer dams
4. Hydro electric power house
MAIN CANALS
1.Right main canal
2.Left main canal
3. Distributary systems

7. 1.SPILLWAY
• Constructing the Spillway is the first step in
the process. After constructing the
Spillway, 48 huge radial Spillway gates will be
fitted to it.
• After the gates are fitted, then the Approach
and Spill channels will be constructed to
channelise river water through Spillway.

13. 2.COFFER DAMS
• Two Coffer Dams, at upstream and down stream will be
built across the river.
• The main purpose of the Coffer Dams is to protect the
Earth Cum Rock field Dam (ECRF Dam) from floods during
construction.
CofferDam Dimensions :
• Coffer Dam U/S: Height 41m; Length 2.3 km; Width
145m; 600m from the ECRF Dam.
• Coffer Dam D/S: Length 1.45 km
• CofferDam U/S can hold up to 120 TMCs of water.
• The state government is planning to supply water to
Polavaram Right and Left Main Canals by gravity

15. 3.EARTH CUM ROCK FILL DAM
• The ECRF dam will be built between the two Coffer dams.
• ECRF dam is the most crucial component of the entire project,
constructed across the river Godavari and plays a major role
in holding river water
• It can withstand up to 50 lakh Cusecs water flow, whereas
peak flow of Godavari river recorded till now is 30 Lakh
Cusecs.
• ECRF is being built by Mega Engineering Company
ECRF dam dimensions:
• Length 1750 mts ; Height 41 ; Width 300 mts at the bottom
and 30 mts in the top

17. Diaphragm Wall:
• Diaphragm wall is the foundation of ECRF dam.
• It is constructed below the ECRF dam and
prevents leakage of water across the dam from
the bottom of ECRF through sand pores.
• Without Diaphragm wall the ECRF will not
sustain and will leads to water leakage from the
bottom of it.

19. BENEFITS OF THE PROJECT
• It is immense advantage to Krishna Delta region
by supplying 80 TMC of water
• It is boon to Rayalaseema region, the Krishna
river water meant for the state of Andhra
Pradesh is currently being shared by
Rayalaseema and Krishna Delta regions. But
with 80 TMCs of Godavari water being diverted
for Krishna Delta region, the entire Krishna river
water meant for AP will be utilised for
Rayalaseema region.

20. • It is beneficial to North Andhra districts by
supplying water through left main canal for
the industrial, drinking and irrigation purpose
• The hydroelectric power project will enable
960 Mega Watt power generation, which
would be very crucial for the new state

21. CONCLUSION
• The much-awaiting Polavaram project is running
behind the targets but the works have been
accelerated a lot in the past 3 years.
• As of now only 65% of the entire project has
been completed.
• The entire state is looking forward to the
completion of the lifeline project and eager to
reap the benefits of it
• Hope that Government will complete it soon.

22. Thank you