In 2016, Ackerman-Estvold provided Architectural and Site Civil design for a 2.0± acre water park containing a Splash Pad, Lazy River, and Water Slide features for the Three Affiliated Tribes (Mandan-Hidatsa-Arikara) located on the Four Bears peninsula west of New Town, ND.  The park is served by a bathhouse and ticketing /concessions building.  The new facility was designed to accommodate potential expansion. A second phase is now currently under construction and includes the extension of the Lazy River, addition of a third slide, and a splash pad.  The facilities are constructed on three cascading terraces that complement the unobstructed view of Lake Sakakawea.  The phase 1 construction cost was $7M which included the Architectural, Water Features, and Site Infrastructure.  Phase 2 construction is estimated at $4M. Phase 1 Project design initiated in 2016 and opened late summer of 2018. Phase 2 design initiated in 2018 and was substantially completed in 2019.

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The Three Affiliated Tribes (TAT) are adding a third phase to the Four Bears Water Park located on the Four Bears peninsula adjacent to the Casino Hotel.  This addition consists of a 6 lane, competition length 25m pool.  The pool depth ranges from 3.5’ to 12’.  Along the deep end is an alcove that extends out of the swimming lanes and serves as plunge point for a climbing wall and cliff jumping feature.  Sloped reinforced concrete decking surrounds the pool serving as a platform for enjoying the sun or an area from which to view swimming events.  Two lifeguard stations serve to provide safety for the bathers. The decked area is equipped with perimeter fencing and gating.  Naturally occurring, poorly consolidated soils require that the pool foundation be supported by a system of rammed aggregate piers.  This recreational feature will be delivered in September 2020 at an estimated cost of $3MM.