St. Croix Preparatory Academy
Baytown Township, MN

Larson Engineering provided civil engineering services for a new school with an area of 90,000 square feet and parking for 258 vehicles on a 58-acre site. Development of the site also included an exterior playground, basketball court and space for future athletic fields.

The project required extending the public water supply and sanitary sewer which is owned and operated by the neighboring municipality. The water supply was extended along the public right-of-way to aid in future development and around the new building for fire protection. The sanitary sewer was extended through a restored prairie and required trenchless construction for crossing the county highway. Care was taken to minimize disturbance to the native prairie and to restore the prairie to pre-construction conditions.

The project also required construction of new turn lanes along the county highway for safe access to the site. The design of the turn lane incorporated the entrance to the housing development across the highway and the railroad crossing to the south of the site.

The stormwater management for the development was achieved through raingardens located in the parking lot and storm sewer routed to a sedimentation and infiltration basin. The infiltration basin was sized for future parking and building additions. The stormwater management design incorporated the requirements of the Watershed District, the Township’s Consultant Engineer, and the County.