Upper Trishuli-1 HEPP is a run-of-river type power plant on the Trishuli River. Its main features include the following structures and facilities:

• 5 m high diversion weir incorporating three large gates (11 m (w) x 16.5 m (h), each)
• Three underground desander each of size 115 m x 10 m x 23.93 m (l x w x h)
• 10 km headrace tunnel of some 6.5 m diameter and 76 m³/s discharge capacity
• Surge tank 40 m high and 300 m long vertical pressure shaft
• Underground powerhouse with three generating units (3 x 72 MW) producing 1,456 GWh/year of energy operating under 345m net head
• Transformer cavern with 220 kV outdoor switchyard and 1.2 km transmission line

Services provided

Phase-I Value Engineering Services:

• Review of project design, costs and construction schedule
• Value engineering involving optimisation of design & construction schedule and cost savings
• Finalisation of employer’s requirements of the EPC contract

Phase-II EPC Contract Award Services:

• Preparation of pre-qualification document, updated EPC tender document and call for bidders
• Preparation of new optimised construction plan
• Management of tendering, tender evaluation, and EPC contract finalisation

Phase-III Project Management and Supervision Services (in JV):

• Review-approval-finalisation of construction/ detail design for civil works
• Review-approval-finalisation of detailed/ shop designs for hydromechanical, electrical and mechanical equipment
• Contract management including management of payment certificates, disputes & claims
• Supervision of construction works, factory acceptance tests, erection works and commissioning works
• Monitoring of project progress and cost control
• Monitoring of site health and safety
• Quality control and assurance
• Finalisation of O&M manuals, as-built drawings, taking-over/ performance certificates and contract closure
• Support during defects liability period