Specifications include, but are not limited to: The North Dakota Atmospheric Resource Board (NDARB), a division of the State Water Commission, seeks to procure a contract for cloud seeding services to include aircraft, seeding equipment and pilots for its 2019-2021 North Dakota Cloud Modification Project (NDCMP) operations. The NDCMP is a dual-purpose cloud seeding program for hail suppression and rainfall enhancement conducted annually over six counties in western North Dakota during the months of June through August. NDARB will require seven multi-engine cloud seeding aircraft, two capable of cloud-top seeding operations and six outfitted for cloud-base operations (one aircraft being a "hybrid" capable of cloud-base and cloud-top operations).