RWE has filed a planning application for the 59MW Gaerwen onshore wind farm in north Wales.
The developer is seeking permission to install nine turbines with a mix of 180-metre and 200-metre tip heights at a site spanning the Gwynedd and Denbighshire borders.
If the application is approved by Welsh Ministers, RWE said the scheme could be operational by 2030.
Gaerwen project manager Arfon Edwards said: “This submission is a significant step towards delivering the Gaerwen wind farm, reflecting the time and energy invested in laying out the in detail for how, if fully approved, the project would be constructed and operated.
“Projects like this are key if Wales is to meet its own energy needs through renewable generation within the next decade, particularly as demand is set to rise significantly between now and 2035.
“In addition, by developing a community benefit package and ensuring the region’s companies can bid for work, we can help secure enduring local economic benefits.”
RWE operates three onshore and three offshore wind farms in Wales as well as five hydroelectric sites.