How do I fill this out? To fill out this agreement, gather all necessary property details and subdivision plans.Create a polished Irrigation Installation Contract with Venngage's customizable template. Edit text, colors, fonts, and more. Easily Create an Irrigation Contract for Your Customers. Download a free irrigation contract template to establish clear service terms with your clients. This Agreement constitutes the complete agreement between the Contractor, Vendor, and Agency. This annual contract between Greenstar Irrigation Co. and the customer is valid from January 1st to December 31st each year. Application for water services is made on the reverse side hereof under and subject to the. Irrigation: The Contractor Shall: 1.