Calaveras Hall Flow-Through Stormwater Planter
There are two LID BMPs on the west side of Calaveras Hall: disconnected roof drains and a flow-through stormwater planter. The flow-through planter was installed in lieu of a rain garden to protect the foundation of the adjacent building.
Disconnected Downspouts
Before this project, the downspouts draining the roof were connected directly to the campus storm drain system, and the roof runoff was sent directly to the American River with no treatment. For this LID BMP, the downspouts were cut and the runoff was redirected into a new flow-through stormwater planter.
Flow-Through Stormwater Planter
This planter consists of compost-amended soils and plants set within a waterproof concrete box (see diagram below). This non-infiltrating LID BMP was chosen because of its proximity to the building. Allowing runoff to infiltrate too close to a building can damage its foundation. After filtration through the compost-amended soil, the runoff is directed back to the drainage system.
Building Next to a Structure
Infiltrating water close to building foundations can saturate the soil and reduce its strength. This can cause settling problems. To avoid this, LID BMPs that don't infiltrate (like the flow-through planter here) must be used. These BMPs don't reduce the volume of runoff discharged to the river, but they do improve its quality.
These are the plants at this BMP Site:
Featured Plant
Sticky Monkey Flower (Mimulus Aurantiacus)
Mimulus aurantiacus: Image by: Curtis Clark (Creative Commons Attribution-Share Alike 2.5 Generic)
Berkeley Sedge (Carex Divulsa)
California Fuchsia (Epilobium Californicum)
Deer Grass (Muhlenbergia Rigens)
Douglas Iris (Iris Douglasiana)
Feather Reed Grass (Calamagrostis x Acutiflora 'Karl Floerster')
Lomandra (Lomandra Longfolia 'Breeze')
Maritime Ceanothus (Ceanothus Maritimus 'Valley Violet')
Spreading Rush (Juncus Patens 'Elk Blue')
Want more details? https://www.owp.csus.edu/csus-lid/
Disconnected Downspouts
Before this project, the downspouts draining the roof were connected directly to the campus storm drain system, and the roof runoff was sent directly to the American River with no treatment. For this LID BMP, the downspouts were cut and the runoff was redirected into a new flow-through stormwater planter.
Flow-Through Stormwater Planter
This planter consists of compost-amended soils and plants set within a waterproof concrete box (see diagram below). This non-infiltrating LID BMP was chosen because of its proximity to the building. Allowing runoff to infiltrate too close to a building can damage its foundation. After filtration through the compost-amended soil, the runoff is directed back to the drainage system.
Want more details? https://www.owp.csus.edu/csus-lid/
Building Next to a Structure
Infiltrating water close to building foundations can saturate the soil and reduce its strength. This can cause settling problems. To avoid this, LID BMPs that don't infiltrate (like the flow-through planter here) must be used. These BMPs don't reduce the volume of runoff discharged to the river, but they do improve its quality.
These are the plants at this BMP Site:
Featured Plant
Sticky Monkey Flower (Mimulus Aurantiacus)
Mimulus aurantiacus: Image by: Curtis Clark (Creative Commons Attribution-Share Alike 2.5 Generic)
Berkeley Sedge (Carex Divulsa)
California Fuchsia (Epilobium Californicum)
Deer Grass (Muhlenbergia Rigens)
Douglas Iris (Iris Douglasiana)
Feather Reed Grass (Calamagrostis x Acutiflora 'Karl Floerster')
Lomandra (Lomandra Longfolia 'Breeze')
Maritime Ceanothus (Ceanothus Maritimus 'Valley Violet')
Spreading Rush (Juncus Patens 'Elk Blue')
Want more details? https://www.owp.csus.edu/csus-lid/