SLIDE 1
Title Detention Vault Configuration Alternatives West Side Neighborhood Storage
- Configuration Criteria
- Pumping Stations
- Community Playfield Alternatives
- Hibbard Park Alternatives
- Thornwood Park Alternatives
Village of Wilmette West Side Neighborhood Storage Stormwater - - PowerPoint PPT Presentation
Village of Wilmette West Side Neighborhood Storage Stormwater - - PowerPoint PPT Presentation
Village of Wilmette West Side Neighborhood Storage Stormwater Detention Vault Configuration Alternatives Matthew J. Moffitt P.E., CFM, CPESC Title Detention Vault Configuration Alternatives West Side Neighborhood Storage Configuration
SLIDE 2
SLIDE 3
Title Detention Vault Configuration Alternatives
- Precast Concrete Detention Vault (not
visible from the surface)
- All configurations have equivalent volume
and performance
- Alternatives designed to minimize impact
to trees
- Deeper vault configurations will require
pump stations
SLIDE 4
Title Underground Detention Wescott Park in Northbrook, IL
SLIDE 5
Title Pump Stations
- Pump only volume below the gravity outlet
- Pump rate designed to provide similar
performance to gravity outlet (24-hr drawdown)
- Backup pump and power included
- Will require more annual maintenance
SLIDE 6
Title Pump Stations
SLIDE 7
$10,680,000
32 Trees Removed
SLIDE 8
$10,420,000 ($260,000↓)
2 Trees Removed
SLIDE 9
$9,880,000 ($800,000↓)
0 Trees Removed
SLIDE 10
Title Community Playfield Comparison
Original Configuration
- Alt. Configuration 1
- Alt. Configuration 2
$10,680,000 $10,420,000 ($260,000↓) $9,880,000 ($800,000↓) Gravity Outlet Gravity Outlet Gravity & Pumped Outlet Relocation of EX Detention Preserves EX Detention Preserves EX Detention 3.86 Acre footprint 3.56 Acre footprint 1.9 Acre footprint 6 feet Tall (underground) 6 feet Tall (underground) 11’-4” Tall (underground) Removal of 32 trees Removal of 2 trees Protects all trees Temp impact of 1 soccer field Temp impact of 3 soccer fields Temp impact of 1 soccer field
SLIDE 11
$7,430,000
36 Trees Removed
SLIDE 12
$6,280,000 ($1,150,000↓)
8 Trees Removed
SLIDE 13
$6,340,000 ($1,090,000↓)
8 Trees Removed
SLIDE 14
$7,180,000 ($250,000↓)
2 Trees Removed
SLIDE 15
Title Hibbard ParkComparison
Original Configuration
- Alt. Configuration 1
- Alt. Configuration 2
- Alt. Configuration 3
$7,430,000 $6,280,000 ($1,150,000↓) $6,340,000 ($1,090,000↓) $7,180,000 ($250,000↓) Gravity Outlet Gravity & Pumped Outlet Gravity & Pumped Outlet Gravity & Pumped Outlet 2.0 Acre footprint 1.0 Acre footprint 1.0 Acre footprint 0.8 Acre footprint 6 feet Tall (underground) 11’-4” Tall (underground) 11’-4” Tall (underground) 15 feet Tall (underground) Removal of 36 trees Removal of 8 trees
- n east side
Removal of 8 trees
- n west side
Removal of 2 trees
- n west side
- Temp. disrupts 2
baseball fields
- Temp. disrupts 1
baseball field
- Temp. disrupts 1
baseball field
- Temp. disrupts 1
baseball field
SLIDE 16
$8,610,000
53 Trees Removed
SLIDE 17
$8,810,000 ($200,000↑)
60 Trees Removed Preserves Oak Grove
SLIDE 18
$7,060,000 ($1,550,000↓)
3 Trees Removed
SLIDE 19
Title Thornwood Park Comparison
Original Configuration
- Alt. Configuration 1
- Alt. Configuration 2
$8,610,000 $8,810,000 ($200,000) $7,060,000 ($1,550,000↓) Gravity Outlet Gravity Outlet Gravity & Pumped Outlet 3.0 Acre footprint 3.0 Acre footprint 1.4 Acre footprint 6 feet Tall (underground) 6 feet Tall (underground) 11’-4” Tall (underground) Removal of 53 trees Removal of 60 trees Removal of 3 trees Impacts Oak grove Preserves Oak grove Preserves Oak grove Temp impact of 2 baseball fields Temp impact of 2 baseball fields Temp impact of 2 baseball fields
SLIDE 20