History
Vazhachal has long been known simply as a beautiful bend of the Chalakudy River on the old route toward the high ranges and the Tamil Nadu border, close enough to Athirappilly that the two are almost always visited together. It lies within the Vazhachal Forest Division, managed by the Kerala Forest Department, which controls access and runs the shared entry-pass system with Athirappilly.
The stretch's modern reputation is bound up with conservation science. The Chalakudy River basin and the Vazhachal forests have been recognised for exceptional ecological value — the area has been identified as an Important Bird Area for its hornbill populations, and the riverine woodland is prized as one of the few of its kind left in Kerala.
From the mid-1990s onward, Vazhachal became the centre of one of Kerala's longest-running environmental controversies: the proposed Athirappilly hydroelectric project. First put forward by the Kerala State Electricity Board around 1996, the plan envisaged a dam on the Chalakudy in the Vazhachal Forest Division — reported at roughly 23 metres high with a 163-megawatt capacity — to generate power.
The project drew sustained opposition on two intertwined grounds. Ecologically, critics warned it would submerge biodiverse riverine woodland, threaten the hornbills' nesting habitat and disrupt an elephant corridor, and could diminish the flow that makes both Vazhachal and Athirappilly what they are. On rights grounds, the Kadar community opposed it, pointing out that many families would be displaced and that the community had already been pushed downstream by earlier hydro projects; under the Forest Rights Act their Community Forest Rights gave the opposition legal weight.
After decades of protests, legal challenges and studies, the Kerala government at one point announced it was shelving the project — though proposals to revive it, at times reframed around tourism, have periodically resurfaced. Because the situation has shifted over the years and remains contested, treat any specific status as provisional and confirm the current position locally.
One date on this page is firm and one is not, and it is worth being explicit about which is which. The firm one is the Community Forest Resource rights that gave the Kadar opposition legal standing: they were granted in 2014, when nine tribal settlements in and around the Vazhachal forest division became the first community in Kerala to hold such a title, over an area on the order of 400 square kilometres. The unfirm one is the date the project began. English Wikipedia dates the 163-MW proposal to 1994 and that is where our figure comes from, but the Malayalam Wikipedia article devoted to the project puts the electricity board’s pursuit of central clearance as far back as 1970, Mongabay-India and Down To Earth give 1979, and The News Minute gives 1996. We now print all four rather than pick one, because a confident wrong number is worse than an honest range.
The other body of work that has shaped the argument is not about birds at all. Published surveys of the Chalakudy record 98 freshwater fish species, 35 of them endemic to the Western Ghats and 31 assessed as vulnerable, endangered or critically endangered, with three critically endangered species strictly endemic to this river system. That makes the Chalakudy the richest river in Kerala for freshwater fish, and it is a large part of why the damming proposals drew objections from ichthyologists as well as from ornithologists and rights campaigners.
Why visit
It is a genuine Western Ghats rainforest riverscape without the full crush of Athirappilly — the same magnificent Chalakudy River, but broader, wilder and framed by dense growth that comes right down to the rocks.
It is one of the only spots in the Western Ghats where all four peninsular hornbill species occur, so patient birdwatchers have a real chance of hearing or glimpsing the great hornbill and its relatives around the riverside forest (sightings are never guaranteed).
The falls pair naturally with Athirappilly just a few kilometres away, letting you combine the region's dramatic single plunge with Vazhachal's long, cascading rapids in a single outing.
In full monsoon the river is at its most powerful and photogenic, a wide roaring sheet of white water against black rock and green forest — one of the great sights of central Kerala.
It carries a rare and important story: a living indigenous community, the Kadar, whose stewardship and rights struggle to protect this forest and its hornbills make Vazhachal as much a place of conservation history as of scenery.
Because it is less commercialised, it suits travellers who want quiet, nature and a slower pace over selfie-crowds — a place to sit by the water and watch the forest rather than tick a box.