Shimla, Jan. 21 -- The Himachal Pradesh Rapid Transport Development Corporation (RTDC) to come up with the development of Asia's longest eco-adventure zipline project at Naddi near Dharamshala, aimed at boosting adventure tourism, generating employment and enhancing the state's revenue through a public-private partnership (PPP) model. RTDC director Ajay Sharma said the initiative reflects the corporation's vision of promoting sustainable tourism while attracting international adventure seekers. He added that the Naddi Zipline has the potential to surpass similar projects in Japan, Thailand and the Philippines, making Himachal a landmark destination in global adventure tourism. The state cabinet on Monday approved the zipline project, with an aim to promote adventure sports in the state. The proposed zipline, spanning a total length of 4,300 metres, will pass through the scenic Bal Valley, connecting culturally significant locations including Gallu Devi Temple, Ball village, Naddi and Maggie Point Khad. The total estimated cost of the project is Rs.7.41 crore,with a 40-year concession period. The project is being implemented under the Swiss Challenge Approach Regulations, 2022, through the Himachal Pradesh Infrastructure Development Board (HPIDB). RTDC floated the tender on June 24, 2025, followed by the opening of technical bids on July 7, 2025. Two companies were found responsive - AVCOM Infotech Pvt Ltd, New Delhi, the original proposer, and NSA Build Tech Pvt Ltd, New Delhi, the challenger. AVCOM Infotech emerged as the most favourable bidder, quoting an annual concession fee of Rs.60 lakh, inclusive of GST, with a 5% annual escalation over the concession period....