Businesses behind a blueprint for an industrial park and 80-bedroom hotel warn Tendring could lose more than 370 jobs if it is rejected.
Seven firms in the Harwich area formed the Horsley Cross Partnership, in a bid to find a location for a business park.
It submitted an application for a 10.7 hectare development, split between six business plots, a hotel and a children's day nursery, on farmland near the Horsley Cross water tower on the A120.
The outline application, which also includes a waste recycling centre, will be considered by Tendring Council's development control committee on Tuesday. A council report says the project is in "serious conflict" with planning policy.
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