Salient Features

1) LOCATION

i) Longitude 81°- 46’

ii) Latitude 17°- 13’

iii) District West Godavari

iv) Taluk Polavaram

v) Distance from the existing barrage 42 KM (26 miles)

near Dowlaiswaram.

vi) Distance from Kovvur/Rajahmundry 34 KM(21 miles)

II. MAIN WORKS:

i) Earth cum Rock fill Dam (1750M +500M) 2310 M . Long

ii) Spillway in Right flank. 985.50 M. Long

iii) Left Main Canal 163.00 KM Long

iv) Right Main Canal 174.00 KM Long

III) HYDROLOGY

i) Catchment area 3,06,643 Sq.Km

(1,18,446 Sq.M)

ii) Design Flood Discharge 1.02 Lakh cumecs

(36 Lakh Cusecs)

iii) Maximum flood discharge observed at 33 Lakh cusecs

Dowlaiswaram (in 1986)

iv) Annual Rain Fall 1022.95 mm

v) 75% dependable yield 972.13 TMC

vi) Yield proposed to be utilized by the Project 301.50 TMC

IV) CROPPING PATTERN PROPOSED:

Sl. No.	Proposed cropping Pattern	Under Left canal area in Lakh acres.		Under Right Canal area in Lakh acres.
		Under Phase-I	Under Phase-II	Under Phase-I	Under Phase-II
1	Paddy	2.00	4.00	1.600	3.20
2	Sugar cane	0.80	1.60	0.80	1.60
3	Chillies	1.20	2.40	0.80	3.60
	TOTAL	4.00	8.00	3.20	8.00
4	Pulses over paddy	2.00	4.00	1.600	3.20

V) WATER DEMAND:

a) Irrigation under Left Main Canal 106.18 TMC

b) Irrigation under Right Main Canal 87.18 TMC

c) Water Supply to Visakhapatnam 23.44 TMC

d) Diversion to Krishna river including losses. 84.70 TMC

--------------

Total 301.50 TMC

---------------

VI) DAM & APPURTENANT WORKS:

A) Water levels:

i) Full Reservoir Level. +45.72 M ( +150.00 Ft)

ii) Low Water Level (MDDL) +41.15 M (+135.00 Ft)

iii) Maximum Tail Water level. +28.92 M (+95.00 Ft)

iv) Minimum Tail Water level. +13.64 M (+44.75 Ft)

B) Reservoir:

i) Gross Storage at FRL (+45.72 M) 5.611 TM(194.60 TMC)

ii) Storage at MDDL (+41.15 M) 3.381 TM(119.40 TMC)

iii) Live Storage above MDDL (+41.15M) 2.130 TM(75.20 TMC)

iv) Submergence:

Wet 403 Ha.

Dry 22479 Ha.

Poramboke 12081 Ha.

Forest 3223 Ha.

------------------

Total 38186 Ha.

-------------------

C) EARTH CUM ROCK FILL DAM ACROSS THE RIVER:

i) Length in Gap gg’ 1,750 M

in Gap g’d’ 560 M

Total 2,310 M

ii) TBL +53.32 M

iii) Top Width 12.50 M

iv) Average Bed level +15.00 M

v) Deep Bed level + 3.00 M

vi) Height above average Bed level 38 M

vii) Height above Average deep bed level 50M

D) SPILLWAY IN RIGHT FLANK

i) Design of Flood discharge 1.02 Lakh cumecs

(36 Lakh cusecs)

ii) Flood discharge level +33.00 M

iii) Top of Level of Gates +45.72 M

iv) Crest level +18.00 M

v) Size of Gates 16m x 15m

vi) Number of Gates 48 Nos.

vii) Foundation level at deep portion. (-)6.10 M

viii)Road Level +54.00 M

ix) Bucket level +5.00 M

x) Length of spillway between Abutments 979.50 M

E) POWER HOUSE:

Power house consists of 12 Units of 80 MW each 960 MW.

VII) CANALS:

Description Left Canal Right Canal

i) Length 163.00 KM 174.00 KM

ii) Discharge 453 Cumecs 453 Cumecs

(16000 C/S) (16000 C/S)

iii) Full supply level at start +40.54 M +40.232 M

iv) Bed Width 96.50 M 80.00 M

v) Full supply Depth 4.27 M 5.00 M

vi) Bed fall 1 in 20,000 1 in 20,000

vii) Proposed ayacut in Phase.I 1.62 Lakh Ha 1.29 Lakh Ha

(4.00 Lakh Ac) (3.20 Lakh Ac)

Supplementation under Phase.II 3.24 Lakh Ha. 3.24 Lakh Ha.

(8.00 Lakh Ac) (8.00 Lakh Ac)

VIII) NO.OF VILLAGES COMING UNDER SUBMRGENCE:

Andhra Pradesh 276 Nos.

IX) POPULATION TO BE REHABILITATED:

Andhra Pradesh 1,17,034 Nos.

X) LAND ACQUISITION:

Wet 11,920 Ha

Dry 33,050 Ha

Garden 2,510 Ha

------------

Total 47,480 Ha

------------

Forest area involved: 3,223 Ha

XI) BENEFITS: (PHASE-I)

I) Irrigation 2.91 Lakh Ha (7.20 Lakh Acres)

II) Power Generation 960 MW

III) Diversion of water to Krishna River 87.70 TMC (including losses)

IV) Water supply to Visakhapatnam and 23.44 TMC (including losses)

villages

Phase-II: Irrigation (Supplementation) 6.48 Lakh Ha (16.00 Lakh Ac)