ITC Holdings

Iowa City Warehouse

Iowa City, Iowa, United States

Certified Silver through 2022

Project Name
Project Type
Habitat - Rain Garden
Green Infrastructure - Rain Garden
Green Infrastructure
About the Program
The ITC Midwest warehouse is located in Iowa City, Iowa. The Iowa City Warehouse Rain Garden is designed to hold stormwater to not only inhibit discharge, thereby mitigating the quantity of water impacting local water bodies after a rainfall event, but also to treat runoff, improving water quality through very simple scientific principles. The rain garden is 840 square feet and sized to hold a specified volume of runoff from the warehouse facility's impervious roof surface, allowing it to enter the garden and infiltrate the soil to be utilized by native plants, decreasing the amount of the pollutants from entering the storm water system. The garden was over-excavated and filled with absorbent and filtering soils. It was then planted with native wildflowers and grasses that absorb and filter contaminants from collected runoff. The biodiversity objective of the rain garden at the Iowa City Warehouse is to improve water quality and wildlife/pollinator habitat, while increasing awareness and interest in the protection of local water resources.

Practices and Impacts
  • The team planted 486 native plants in the rain garden in the fall of 2010.
  • The team works closely with a local landscaping company, Turf Masters Lawn & Landscape, to perform monthly maintenance of the rain garden. The rain garden is mulched annually, and vegetation is cut back in late fall. Weeding and pruning occurs weekly during the growing season. The storm water structures in the rain garden and the interpretive sign are also visually inspected for damage during maintenance activities.
  • The team monitors rain garden wildlife, pollinators and vegetation during the growing season.
  • The team installed a bee tube structure within the rain garden in 2019. Bee tubes create habitat for cavity-nesting bees.