1. FRP Manhole Covers in Kerala’s Backwaters: Corrosion-Resistant Solutions for Coastal Infrastructure

Kerala’s backwaters are a global attraction, drawing tourists from around the world to marvel at their serene lagoons, lush greenery, and floating houseboats. Beneath this natural beauty, though, comes a recurring problem for urban infrastructure: corrosion. Traditional manhole covers deteriorate quickly due to their high moisture content, continuous dampness, and salt-laden winds. In this context, corrosion-resistant FRP manhole cover are proving to be a sustainable, long-term solution for Kerala’s municipal planners.

In towns like Alleppey, Kottayam, and Kochi, where the drainage system runs close to water bodies, metal manhole covers rust within months, leading to safety hazards and increased municipal costs. Concrete covers, too, fail over time as they absorb water and crack during temperature variations or algae growth. In contrast, FRP is a lightweight, non-conductive, and non-corrosive material that holds up well in conditions with high salinity and humidity. Manufactured using a combination of thermosetting resin and fiberglass, FRP manhole covers have a service life of over 15 years, even when exposed to brackish water and tropical downpours. Municipal bodies have started using FRP covers in flood-prone and heritage zones, with the Fort Kochi Smart City pilot project setting an excellent example. These covers can be manufactured in custom dimensions, textures, and colors to match heritage aesthetics—something particularly valuable in Kerala’s temple towns and colonial-era lanes.

From a cost perspective, while FRP covers may have a slightly higher upfront price than concrete, they offer significant savings in the long run by eliminating the need for frequent replacement or maintenance. Due to its lack of scrap market value, FRP is also impervious to theft. This reduces incidents of stolen covers, a common issue in many Indian cities.

FRP covers also support environmental sustainability. They can be made from recycled materials, are reusable, and reduce the strain on local waste management systems. Additionally, the production process uses less energy compared to metal foundries.

In summary, the shift to corrosion-resistant FRP covers in Kerala’s backwaters is not just about durability—it’s about protecting infrastructure in fragile ecosystems, reducing costs, and aligning with the state's vision for sustainable development. As climate change increases rainfall and flooding frequency, the adoption of FRP will be critical to preserving both function and beauty in Kerala’s urban environments.