The existing Thotapalli regulator is the first diversion work on river Nagavali, which was constructed with RR masonry during the year 1907-1908. The Thotapalli old regulator consisting of mainly the following components:
1. Nagvali Left Main canal of length 37.626 Km with 8 nos of branch canals and distributory system was executed during the year 1908-1934 including construction of CM & CD works with RR masonry in Surki mortar to feed an ayacut of 31200 acres.
2. Nagavali Right main canal of length 20.016 Km with 11 nos of branch canals and distributory system was executed during the year 1934-1958 including construction of CM & CD works with RR masonry in surki mortar to feed an ayacut of 9000 acres.
3. 9 Nos of open head channels on left side of river to feed an ayacut of 10606 acres and 5 nos open head channels on right side river to feed an ayacut of 13194 Acres.
As such the total ayacut being irrigated under the above regulatory system is 64000 Acres. It became old and showing signs of deterioration. It is proposed to construct a barrage near Thotapalli village across Nagavali River at about 500 mts U/S of existing Thotapalli regulator in order to save the existing ayacut of 64000 Acres and to irrigate additional ayacut of 120000 Ac in Vizianagaram and Srikakulam districts including drinking water supply in 24 villages en-route the proposed Right Main canal.
|Location||:||Thotapalli (Village) Garugubelli (Mandal)|
|Longitude||:||80° 36' 15'' E|
|Latitude||:||18° 46' 52'' N|
|Ayacut (Stabilized)||:||55,285 Acres|
|Mandals Benefitted||:||(1) Veeraghattam (2) Palakonda (3) Vongara|
|Dependable Net Yield||:||6700 Mcft.|
|Water Allocation||:||5.780 TMC.|
|Maximum Flood Discharge||:||1,13,200 C/s|
|Length||:||Left Main Canal : 37.40 KM|
|Right side Canal : 19.80 KM|
|Discharge||:||Left Main Canal : 414 C/s|
|Right side Canal : 106 C/s|
|Ayacut||:||Left Main Canal : 38,708 Acres|
|Right side Canal : 16,577 Acres|
|Cropping Pattern||:||Khariff (Paddy)|
|Villages Benefited||:||32 Nos|
|Rehabilitation||:||- NIL -|