You have worked hard to engage with your community both in the campaign and application phase of the process. It is really important you continue to take your community on the journey with you once you submit your application. Social media or email newsletters can help ensure you update regularly on progress and feedback on the outcomes of the local consultation and water user survey that you held.
After you have submitted your application publish your document for your community to access. You could use Google Documents for example, and link to it via your Facebook page or an email newsletter. Why not continue with a monthly or quarterly newsletter to your community contacts.