Section 41-3-904 - By-product water; appropriation; conditions and limitation(a) Any person intending to appropriate by-product water for beneficial use shall file an application with the state engineer on the forms and in the manner prescribed for groundwater applications. By-product water shall be considered as being in the same class as groundwater for the purposes of administration and control. An application may be filed only if both the following conditions exist: (i) The by-product water is intercepted while it is readily identifiable and before it has commingled with the waters of any live stream, lake, reservoir or other surface watercourse, or part of any groundwater aquifer; and (ii) The developer of the water is the applicant, or an agreement is filed in the office of the state engineer wherein the developer of the water gives the applicant permission to use the water as proposed in the application. The agreement must be signed by the developer of the water, and may contain provisions for reservation of the water to the use of the developer-grantor, and if so stipulated, the reservation can be superior in right and title to any use by the applicant-grantee. (b) In all other cases, an application to appropriate by-product water shall be governed by the laws pertaining to surface water, and by-product water shall be considered as part of the surface supply, subject to use by existing priority rights.