Tochi Irrigation Scheme Infrastructure & Facilities - Oyam
Main Components and Physical sizes
• Earthen dam :
Zoned earth fill with Clay, Gravel, Sand filters, Stone riprap protections and turfing.
• Spillway:
Ogee weir – Spillway with U/s and D/s aprons.
• Dam Reservoir
• Head Regulators:
Two (2) Water intake structures on Dam embankment.
• Main canals
• Secondary Canals:
Secondary canals and associated structures – lined canal with Cross regulators, Turnouts and Crossing bridges.
• Tertiary and Quadrant Canals:
Tertiary, Quadrant canals and associated structures – Unlined canals with Turn out structures, Drop structures and Outfall structures.
• Drains and associated Structures:
Secondary, Tertiary drains and associated structures – Unlined Drains with Drop structures, Pipe culverts and cross bridges.
• Access and Scheme roads:
Road including culvert crossings and side drains.
• Flood protection dykes:
FPD with blended materials and river dredging at Spillway tail channel and Tochi River.
• Steel/Hydro mechanical gates:
Various size of steel Sluice gates and Concrete gates for Tertiary turnouts.
• Access and Scheme roads:
Roads including culvert crossings and side drains.
• Scheme building and facilities:
Includes Store, Office block, Residence blocks, Sanitation blocks, Guard houses and General civil works.
