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Martin L. Smith, ASLAEcological Design Group, Inc.Little Rock, Arkansas

A world of communities living together in

peace and equitably sharing the resources of a

healthy planet.

GREEN INFRASTRUCTURE

Case Study:

Heifer International

World HeadquartersLittle Rock, Arkansas

EXISTING SITE

Brownfield98% ImperviousHeavy Clay Soils

SUSTAINABLE STRATEGIES

Re-use of Materials

Removal of ContaminatedSoils

Site Storm waterManagement

Re-creation of anEcosystem

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

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Site Design

Parking Bio Retention

Reuse of Materials

Constructed Wetland

Wetland Basin

Native Prairie

Storm Water Filtering

Storm Water Collection

Native Plant Material

Drip Irrigation

Habitat Creation

Organic Management

LEED Platinum Certified

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

PARKING LOT DRAINAGECrown Center of Bays

Sheet Flow towards

Pervious Paving

Pervious Paving acts as

Primary Filter

Reduce Storm Water

Drainage Infrastructure

Reduce Curb and Gutter

PARKING LOT MATERIALS

Concrete Drive Isles

GravelPave 2 Parking Bay

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

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ALTERNATIVE POROUS

PARKING MATERIALS

Grass Pave

Gravel Pave

Porous Concrete

Porous Asphalt

Open Jointed Paver Blocks

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

BIO RETENTION AREAS50% Sand

50% Sandy Loam

Seeded with Native Grasses

Wildflowers and Forbs

Trees - Blackgum

STORM WATER INLETS

Primary Storm WaterSecondary Storm Water

Raised Rim Inlet 12

Sand Filter at Inlet

Core Drill (4) 1 Holes 2

Below Grade

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

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BIO-RETENTION BENEFITS

Reduce non point source streampollution

Reduce stormwater drainagestructural cost

Slow runoff and increaseinfiltration

Removal of suspended solidsfrom stormwater runoff

Plant material absorption ofnitrogen, phosphorus, zinc, leadand petroleum hydrocarbons

Reduced maintenance (mowing

and fertilizing)

BIO RETENTION NATIVE GRASSES, FORBS AND WILDFLOWERS

Blue Sage

Primrose

Coreopsis Radiata

Little Bluestem

Lanceleaf Coreopsis

Maximillian Sunflower

Spring Obedient Plant

Blue Flag Iris

Dense Blazing Star

Indian Grass

Pink Evening

Illinois Bundleflower

Rudbeckia

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

CONSTRUCTED WETLANDSGroundwater Recharge

Groundwater Discharge

Floodwater Alteration

Sediment Stabilization

Sediment/Toxicant Retention

Nutrient Removal/Transformation

Aquatic Diversity

Wildlife Diversity

Aquatic Plant MaterialBlue Flag Iris

Copper Iris

Lizards TailArrow Arum

Spider Lily

Sweetflag

Blue Pickerel Rush

Soft Rush

Thalia Dealbata

Rudbeckia Maxima

Virginia Sweetspire

HEIFER

INTERNATIONAL WORLD

HEADQUARTERS

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WETLAND UNDER CONSTRUCTION

The south wetland provides a picturesque setting for headquarters while

the native canopy trees, shrubs and shoreline aquatics provide a shelteredhabitat from the surrounding urban setting.

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An outdoor sitting area cantilevered over the wetland provides a respite

for visitors and staff as well as a viewing platform to enjoy the dramaticseasonal changes of the wetland.

The projects diverse ecosystem includes Rudbeckia maxima,

Thalia dealbata, River Birch, Blue Flag Iris and Virginia Sweetspirewhile boardwalks linking parking fields provide opportunities

for wildlife viewing.

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A concentric ring of water surrounds the building,reflecting the architecture, and supporting nativespecies plant material. The water also provides anatural transition from the building to parking fields.

The 2.5 million gallon basin serves as the secondtreatment area for the contained watershed. Thewater collected from the parking lot is circulated backthrough the constructed wetland. The surroundingarea is seeded with prairie mix native to Arkansas.

The bio-retention areas, which are mowed twice a year and

controlled burned every 3 years are irrigated solely by natural

rainfall. The gravelpave system acts as a filter before the

stormwater enters the bio-swale.

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creation of an ecosystem in an urban environment

THANK YOU