lowertown ballpark (chs field): a home run for

LOWERTOWN BALLPARK (CHS FIELD): A HOME RUN FOR STORMWATER REUSE

MN WATER RESOURCE CONFERENCE - 2015

Saint Paul’s CHS Field

• Public-private partnership

• Brownfield redevelopment

• Sustainability focused

• Rainwater harvesting across properties

PartnershipAgencies• Capitol Region WD• Metropolitan Council• Metro Transit

Project Team• St. Paul Saints• City of Saint Paul

Parks and Rec.• Ryan Companies

• Schadegg Mechanical• Solution Blue, Inc.• Rainwater Management Solutions

Site Context• Oldest part of city

(Historic Lowertown)• Previous

Gillette/Diamond Products site

• Industrial brownfield, 9 acres all impervious

• Destination site: near light rail line and Mississippi River

CHS Field

Ballpark Impact• 180 events each year

– 50+ Saints games– College partnership– Amateur baseball– Concerts– Community space– Rentable

conference– Reception space– Movie nights

• 400,000annual visitors

• 7,000 seats

Internet Cat Video Festival – Record 13,000 in attendance!

Greater Lowertown Master Plan • Reduce use of potable water• Use rain water and stormwater

as a resource – irrigation –within buildings

Stormwater Regulatory GoalsDesire to exceed minimum requirements

• Watershed District – Runoff rate– Volume reduction– Quality (TSS and TP)

• City of Saint Paul– Runoff rate – Sustainable stormwater overlay

• MN Sustainable Building Guidelines– Zero discharge for 1.25” event– Reduce TP– Reduce potable water consumption

State and Local BarriersStormwater Reuse

• Lack of standards• Multiple jurisdictions• No defined process• Operation and

maintenance oversight• Water economics

Stormwater Management“Double Play”

Operation & Maintenance Facility

• 4-acre facility for storing light rail trains

• Roof drained awayfrom CHS Field site

• Active train electrical grid near rain leaders

BMPs Include:

All BMPS remove >90% TSS

• 27,000 gallon rainwater harvesting cistern

• Tree trenches with Stockholm Soil

• Vegetated swale• Rain garden in

parking lot• Underground

filtration

Rainwater Harvesting

Rainwater Harvesting

Rainwater Harvesting

Cistern:• 27,000 Rainwater

Harvesting Cistern

• Geotextile preliner, flexible membrane main liner

• Smoothing inlet• Inlet, overflow,

vent, drain, and recirculation line

Treatment:• WISY vortex filter• 1 micron

absolute bag filters

• 4 UV disinfection lights (30 gpmeach)

The “Skid”

System Automation:

• Rainwater harvesting system connected to facility management system

• Ultrasonic sensors monitor tank level

• Flow meters for irrigation and toilet lines

• Valve automatically switches to municipal water when cistern is dry

Water Quality Goals

Water Quality Testing

BMPs Include:

All BMPS remove >90% TSS

• 27,000 gallon rainwater harvesting cistern

• Tree trenches with Stockholm Soil

• Vegetated swale• Rain garden in

parking lot• Underground

filtration

Tree Trenches

• 3 tree trenches with Stockholm soil mix

• Over 26,000 ft2 drainage area• Surface flow and subgrade

inputs• >90% annual TSS reduction

Swale and Rain Garden

Rain Garden• Located in east parking lot• Size: 1,700 ft2

• Drainage Area: 108,444 ft2

Bioswale• Located in the dog park• Size: 1,740 ft2

• Drainage Area: 18,344 ft2

Underground Filtration• 3 locations throughout

park• Treats field runoff and

significant impervious surface drainage

• Rock storage for retention/rate control

• Sand filter for WQ improvement (>90% TSS Reduction)

Costs of Enhanced Water Sustainability

• Total ballpark cost ……………………. $63,000,000• Total optional BMP costs*……………….$487,000

– Rainwater harvesting system ……….$300,000– Enhanced stormwater items …………. $ 68,000– Design and Admin/Fees ………………… $ 75,000– Miscellaneous.……………………………… $ 44,000

• Total grants ………………………………… $425,000 *Does not include cost to re-route OMF rain leaders

Rainwater Harvesting System

RHS Components RHS Controller Connect and Install

Cistern Room Overflow pipes Signage

Interpretive Signage

Interactive Kiosks

Art & Education

Art & Education

Other Sustainability Practices• 300 Solar Panels, one of

largest stadium arrays in nation

• Extensive recycling and composting = “Zero Waste” facility

• 95% of previous building recycled.

• 20% remains on-site as walls, floors, or crushed for field drainage system

Questions?

Nate ZwonitzerCapitol Region Watershed District

Nate@capitolregionwd.org

Design Build Challenges

• Fast pace project for new (slow) dialogue

• Lack of certainty, missed design packages

• Subcontractor team continuity

• High risk / low fee initiative

Design Build Challenges

Sample Title Slide for .ppt

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Presentation Title

NameOrganization

Phone numberEmail address

Website

MWMO Stormwater Park and Learning Center

Presented by:Kurt Leuthold, PE, LEED AP, Principal

Barr Engineering Co, Minneapolis

The Transformation of an Urban Industrial Site

2015 Water Resources ConferenceOctober 13, 2015

Acknowledgments

Environmental Response Fund Grant

DEED Grant

Site Location

2522 Marshall Street NE

Site History 1939

Site History 1950

Site History 1960

Existing Site Conditions

Existing Site Conditions

Environmental Investigation

MWMO Mission

The Mission of the Mississippi Watershed Management Organization:

The MWMO’s mission is: to lead, and to foster stewardship of the watershed with actions that promote civic ownership and responsibility and through measures that achieve diverse and functional ecosystems.

Goals

• Pedestrian access to the river• Views of the river• Treat stormwater• Treat adjacent properties if possible• Reduce peak flow as much as possible• Stormwater demonstration• Stormwater experimentation• Education• Add greenspace• Public amenity• Create habitat

Schematic Designs

Site Overview

Site Overview

Phase 1 2011Phase 2 2014

5

Site Overview

Photo by MWMO

Site Overview

Photo by MWMO

Pedestrian Access and Views

Pedestrian Access and Views

Excavation Required for Access and Views

Lots of Excavation

Lots of Excavation

Pedestrian Access and Views

Environmental Cleanup Grants

Environmental Response Fund Grant$294,000

DEED Grant$371,000

Stormwater in Sequence

• Grass Swales• Cistern• Sunken Tree Grove and

Runnels• Large Bioretention Basin• Experimental Filter Basin• 2 More Bioretention Basins

Stormwater – Grass Swale

Stormwater – 4,000 Gal. Cistern

Stormwater - Cistern

Stormwater – Sunken Tree Grove and Runnels

Photo by MWMO

Stormwater – Large Bioretention Basin

Stormwater – Large Bioretention Basin

Photo by MWMO

Stormwater – Experimental Filter Basin

Photo by MWMO10

Stormwater Experimentation

Stormwater Experimentation

Stormwater Experimentation

Stormwater – Gravel Tree Nursery

Photo by MWMO

Stormwater - Gravel Tree Nursery

Photo by MWMO

Stormwater – Green Roof

Photo by MWMO

Stormwater – Cantilevered Scuppers and Permeable Pavers

Education - Floods

Education - Floods

Education - Signage

Education - Signage

Habitat

Habitat

Stormwater in Action

Photo by MWMO

Photo by MWMO

Photo by MWMO

15

Stormwater in Action

Photo by MWMO

Amenities

Amenities

Photo by MWMO

Challenges

Challenges

Challenges

Challenges

Challenges

Challenges

Public Art

Photo by MWMO

Neighborhood Transformation

Neighborhood Transformation

Lowry Bridge

Grand Opening

Questions

Site Overview

Minnesota Water Resources Conference

October 13, 2015

Stormwater Reuse in Urban SettingsCase Study: Minneapolis Edison High School

Photo Courtesy of Mississippi WMO

Agenda

1Project Background and Overview

2Supply vs. Demand

3Storage Sizing

4Regulatory Issues

MWMO• Who we are• Mission and

Goals• Visibility• Education• Monitoring

MWMO Offices

Edison HS

NE GREEN CAMPUS

EDISON PHASE I

EDISON PHASE II

Background/OverviewNortheast Green Campus• Site Improvements

• Modernized Football Field and Track• Community Plaza• Concessions/Bathroom Building• Additional Parking

1

Background/OverviewNortheast Green Campus• Green Elements

• Engineered Soil Amendments for Football Field

• Stormwater Reuse– Irrigation– Future use in Toilets/Urinals

• Stormwater Monitoring/Education• Community Gardens• Solar Canopy

1

EDISON PHASE II

Background/OverviewNortheast Green Campus• Project Partners

• Mississippi Watershed Management Organization

• Minneapolis Public Schools• Holland Neighborhood Improvement

Association• National Football League thru the Local

Initiatives Support Corporation

1

PROJECT SCHEMATIC

Supply vs. DemandNortheast Green Campus• Gray vs. Green

• 3:1 Rule of thumb• Supply

• Impervious Surfaces• Roofs• Sidewalks/Plazas• Parking Lots• Turf areas

• Demand• Irrigation

• Turf (1” per week)• Gardens

2

Impervious and Irrigation Areas

Storage SizingNortheast Green Campus• Design parameters

• Size of storm/Impervious Area?– Can store a X” rain event

• Irrigation Area/Duration w/o Supplement?– Can irrigate XX acres for XX days w/o

supplement• Reliability?

– Met Council Worksheet• Diminishing Returns

3

Common Questions on Storage:1. How much storage do we need?2. How often will we need to use potable water?3. Will we drain it in the winter?4. How deep does it need to be?

SOURCE Site DataImpervious Area 115,870 square feetImpervious Area 2.66 acres

USE Demand DataIrrigation Area 89,298 square feetIrrigation Area 2.05 acresIrrigation Rate 1 inches per weekIrrigation Rate 1 inches / week during hot season

Irrigation Season 13 39 week numberHot Irrigation Season 27 30 week number

Storage DataStorage Provided 200,000 gallons

Total Storage Required 674,407 gallons %Weeks that Flows Must be Augmented 234 weeks 28.0%

Weeks that Reuse System will Meet Demand 603 weeks 72.0%

Metropolitan Council Stormwater Reuse GuideWater Balance Tool - 31 year Precipitation Data

September, 2011Prepared by CDM

Regulatory IssuesRequirements for stormwater reuse systems in MinnesotaCurrently, the State of Minnesota does not have a state-specific code applicable to stormwater harvesting and reuse. The MPCA has developed guidelines for the use of reclaimed wastewater. In 2011, the Metropolitan Council developed the Stormwater Reuse Guide, which was developed based on review of water reuse programs and guidance from other states.

4

Regulatory IssuesCity of Minneapolis Requirements• Meet 2-, 10-, 100-year pre/post conditions

• Need to oversize storage?• Is the glass half full or half empty?

• Meet water quality requirements (70% TSS removal for a 1.25” rainfall)

• Is the underground storage the same as a NURP pond?

4

Regulatory IssuesPlumbing Code• Uniform Plumbing Code allows for use of stormwater in toilets, urinals, but leaves regulation up to local agency.

• Not currently allowed by State plumbing code.

• U of M and St. Paul Saints ballpark trials

4

Questions?

Stephanie Johnson, PhD, PE - Mississippi Watershed Management Organization

SJohnson@mwmo.org@MississippiWMO

Dan Edgerton, PE - StantecDEdgerton@stantec.com

Mark Statz, PE - StantecMStatz@stantec.com@mstatzstantec