GSI In Progress
2017 PWD Summer Internship Clare Marshall and Hakeem Wilson
Part One: BecomingAPart of the GSITeam
June-July
GSI Design
GSI Program Support: Lawncrest Recreation Center
Concept Design
3 Rain Gardens
2TreeTrenches
1 Stormwater Planter
1 Swale
Construction Documents
Construction Documents
Construction Documents
PartTwo: Design Collaboration
August: Dr.Tanner G. Duckrey Public School
Site Context
Duckrey Background
Existing Site Conditions
View of tennis courts from 16th Street
Abandoned Tennis Courts
Tennis Court Slopes
Existing Swale
Existing Inlets
CDC Proposed Concept
SiteAnalysis: DrainageArea
SiteAnalysis:Accessibility
SiteAnalysis:Accessibility
Conceptual Design
August:
Dr.Tanner G. Duckrey Public School
Site Layout Iterations
2. 3. 4.
1.
Final Site Plan
Final Grading Plan
System Design: Sizing
Total DA(proposed):
● School Parcel: 134,918 SF
● Streets Disconnection: 208,087 SF
Required Storage:
*managing 1.5” rainfall depth
● Surface: 16,865 CF
● Subsurface: 26,011 CF
RG1 RG2 Elevation (ft) Area (SF) 75.5 3937 2577 76 4502 2975 77 5936 3782 Available Footprints:
System Design: Sizing
● Available surface storage (HydroCAD): 6112 CF
6” ponding
~2’soil
● Total subsurface storage needed: 36,764 CF ○ Constraints: available area and depth
Stone storage not viable → explore other options!
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System Design: Subsurface Storage
R-Tank (ACF)
● Double + Mini Combination
● Storage volume = 10.36 CF per tank
● 95% void internal area
System Design: HydroCAD Modeling
System Design: Piping Plan
System Design: SWMM Modeling
● Storm Sizing:
○ 15 min peak intensity (2.5 in/hr)
○ 10 yr storm (6.95 in/hr)
● Surcharging:
○ Inlets vs. manholes
● Maintaining min. velocity
System Design: Culvert
System Design: Sections
PLANT PALETTE
FINALPLANTING PLAN
View Path Between the Rain Gardens
