A Maine company is looking to build a nearly $100 million battery storage facility on property at the local landfill. The facility, which would potentially hold between 100 and 150 megawatts of renewable energy, would be connected to the Eversource power grid and serve as a backup for power “to save for a rainy day when we have a capacity event,” Dale Knapp of Walden Renewables of Portland, Maine told the City Council last week during a presentation on his proposal. If the plan is approved, Knapp said the city will pocket $1.47 million in lease payments by the end of the 40 years. “It’s probably close to a $100 million facility,” he said, adding that the facility itself would be also taxable.