Prairie View Middle School: Pioneering Storm Shelter Design for ISD 728

Project Overview

Prairie View Middle School is a two-story K–12 facility designed for ISD 728 in Otsego, Minnesota. BKBM provided both structural and civil engineering services, enabling seamless in-house coordination across the full project scope. Design was completed in 2020, navigating the early months of the COVID-19 pandemic while delivering one of the cleanest construction outcomes the team had experienced.

Project Highlights

  • ICC 500 Storm Shelter:
    • Designed one of the first code-compliant ICC 500 storm shelters in a Minnesota school under the updated MN Building Code
    • Solid precast walls, steel composite joists, and a reinforced slab on composite metal deck, built from the ground up with no existing precedents to reference
  • Structural system:
    • Two-story structure framed with steel beams and precast plank floors with a steel joist roof
    • Mechanical penthouses designed using composite steel beams and concrete on composite metal decking, constrained by a building height restriction
  • Early foundations package:
    • Delivered a phased foundations package to get earthwork and footings underway before wet season and winter conditions
    • Required committing to structural decisions ahead of full design completion, a disciplined approach that kept the project on schedule
  • Civil engineering and site work:
    • Soils investigations uncovered a large on-site sand deposit, uncommon in a clay-dominant region, that reduced imported material costs and added measurable value to the project
  • Coordinated document set:
    • BKBM led civil and structural coordination in-house, producing a construction-ready document set that contributed directly to bids coming in 10–15% under budget

Engineering Solutions

With structural and civil services under one roof, BKBM coordinated early-package decisions, height-restricted penthouse design, and first-of-its-kind storm shelter details in parallel, working directly with building officials to establish design approaches where no standard precedent existed.

Results and Impact

Construction bids came in 10–15% under budget, a result of favorable market timing and a well-coordinated, construction-ready document set. Prairie View Middle School now serves ISD 728 students and staff with one of Minnesota's first ICC 500-compliant storm shelters in an educational setting, a lasting addition to the community's safety infrastructure that future Minnesota school projects can build from.