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Salient Features - (Proposed)
| Hydrology |
| Origin of river Song |
Surkanda Devi Temple |
| Catchments area of Song river
(i) At Song dam site
(ii) At Kalinga canal H/W
(iii) At Satyanararyan gauge site (CWC)
|
85.225 sq.km
132.140 sq.km.
600.00 sq.km.
|
| Snow-bound catchments area |
Nil |
| Discharge of river at dam site Song river is perennial
(i) Minimum discharge
(ii) Maximum discharge .
(iii) Highest flood discharge
(iv) Design flood discharge
|
1.0 - 1.25 cumec
10.0 - 12.0 cumec
55.0 cumec.
1400.0 cumec.
|
| Dam |
| Location |
Village Sondhana (P.O.) Maldavta)
Distt : Dehradun (UA)
Bearing of Dam : N 300 W
Longitude : 780 11'30"E
Latitude : 300 18'08"N |
| Type of Dam |
Concrete gravity dam |
| Parameters of Dam |
| Length
(a) Top
(b) Foundation
|
365.0m
64.0m
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| Height (from deepest foundation level) |
148.25m |
| Width
(a) Bottom
(b) Top
(c) Slope D/S slope
(d) U/S slope
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125.23m
6.0m
0.80 : 1 (H:V)
0.10 : 1 (H:V)
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| Stilling basin
(a) Type
(b) Length
|
II
100.0m
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| Relevant levels
(a) Bottom of dam
(b) River bed level
(c) Anticipated silted bed level
(d) Mean draw-down level
(e) Full reservoir level
(f) Top of dam
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851.75m
874.75m
930.0m
938.0m
995.0m
1000.00m
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| Reservoir
Gross storage capacity at 995.0m
Revised storage capacity after 100 year
(a) Live storage capacity at 995.0m
(b) Dead storage capacity at 930.0m
Submerged area at 995.0m
Fetch of reservoir
Length of reservoir along river
|
3631.00 Ha-m
3092.39 Ha-m
155.15 Ha-m.
83.85 Ha-m
3.00 km.
4.00 km
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| Spillway
Ogee type spillway
Spillway gate
(a) Type
(b) No. and Size
Intake Structure
(a) Type
(b) Size
(c) Gate
|
3 bays each of 8m with 4m. wide peirs.
Radial/Tainter
3 No- 8m x 10.3 m
Straight type in right side Non over flow block
2m x 1.5m
Vertical lift type
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| Head race tunnel
(a) Size (diameter)
(b) Length
(c) Type
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2.1 m
6.8km
Horse shoe
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 The city of dehradun is the most important town in the state of uttaranchal and is on the tourist map of the country. The importance of this town has further been enhanced when it has been made capital of newly formed state. The tourists who visit mussoorie and the pilgrims who visit the shrines of badri, kedar, gangotri and yamunotri, they do halt at dehradun. This has put a tremendous pressure on the necessary amenities to be provided to the public. Water supply is one such amenity which has to be tackled in such a fashion that the system survives for long and takes care of future demand. Dehradun is facing shortage of water supply and the situation becomes more grave during summers when the discharge of rivers reduces.
According to the data furnished by garhwal jal sansthan, dehradun, there is shortage of 76.46 million litre of drinking water per day i.e. 27.90 million cubic metre per year. It is anticipated that this shortfall will go upto 256.02 million litre per day or 93.35 million cubic metre per year by the year 2051. Keeping this in view, it is proposed to collect the surplus water during monsoons by constructing a dam to solve the problem of drinking water for the city of dehradun and adjoining areas.
 The project envisages a dam of about 148.25 m height, one power house of 6.0 mw installed capacity near village kumalda. The tail water shall be released into the existing kalanga canal. By construction of the dam, some of the water will seep into the ground and supplement the ground water table which, in turn, will enhance the output of tubewells in the vicinity. As such this project will serve as multipurpose project for water supply, irrigation, tourism development, hydro-power generation and supplementing ground water table.
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