agenda: introduction and principles of low impact ... · presentation of initial ideas community...
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Agenda: Introduction and principles of low Impact development ( LID )
Presentation of initial ideas Community feedback, preferences and questions Review schedule and next steps
December 2011
Riversmart Washington is a partnership to
enhance District neighborhoods and
reduce demands on the District storm drain system
Runoff management goals:
Intercept the first 1.2 inches of runoff (90% of most rainfall events), from public property, before it enters the storm drain system Filter the runoff to remove sediment, chemicals and excess nutrients Retain as much of that volume as possible through infiltration or reuse for irrigation Monitor the change in runoff quantity
Study the design, constructability and maintenance of green infrastructure systems
as a model for other neighborhoods
Community enhancement goals:
Improve pedestrian safety and accessibility Enhance neighborhood aesthetics and ecological habitat value Increase tree canopy
Create community gathering areas and recreational amenities
Promote environmental education opportunities
Precedent LID practices
Proposed Concept Plan
Permeable Pavements
Permeable Pavements
Curb Bump Out Rain Gardens
Curb Bump Out Rain Gardens
Title
Title
Benefits:
Traffic calming and pedestrian safety.
Enhanced streetscape plantings. Preserved existing trees.
Environmental education opportunities at school site. Implications:
Modest reduction in on-street parking.
Next public meeting Feb/March 2012
Design complete Spring 2012
Construction begins Summer 2012
Construction ends Spring 2013