CHATHAM PARK EXCEPTIONAL DESIGN EVALUATION 1
Chatham Park Basics 7,600 Acre Mixed Use Development 22,000 New Residences 22 Million Square Feet Commercial Space 60,000 Jobs 2,000+ Acres Open Space Estimated $80 Billion Economic Impact 2
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A Town within a Town 4
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Pittsboro Leading By Example Urban Bioretention Robeson Creek Watershed Plan Retrofits 6
Trails Multi Purpose Parks Natural Settings 7
Chatham Park s Commitment Master Plan Adopted August 2015 In exchange for greater flexibility, planned developments in this district are expected to deliver communities of exceptional design, character, and quality that preserve critical environmental resources 8
Question & Answer Session Question: What does development of exceptional design, character, and quality really mean? One Possible Thought: I ll know it when I see it. (or don t ) 9
What is Exceptional Design? EXCEPTIONAL DESIGN STAKEHOLDERS 10
Exceptional Design Goal: Protect Critical Environmental Resources Streams, Wetlands, Floodplains, Buffers, Tree Canopy How #1: Avoid Disturbance Minimize Impacts How #2: Minimize Risks Protect Areas Around Critical Environmental Resources Prevent Development Impacts From Migrating Downstream How #3: Offset Impacts with Uplift Within Development Footprint, Repair & Replace Natural Functions, Add Community Value 11
Watershed Resiliency implementing techniques that make a watershed less susceptible to disturbance events or that promote quick system recovery following a disturbance. New York State Water Resources Institute 12
Watershed Resiliency Watershed Health Natural Establishment & Maturity Exceptional Development Less Disturbance Disturbance & Impact Quicker Recovery Adaptation & Restoration Adaptation & Restoration Conventional Development Time Disturbance & Impact 13
Measurable Results 14
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Research Conclusions Question: What does development of exceptional design, character, and quality really mean? Chatham Park s Operating Answer: Development which maximizes watershed resilience, while at the same time providing direct benefits to the community. 16
Measuring Resiliency Objective determination 6 Categories 27 Metrics Scored at sub-watershed level Focused on watershed health Tied to multiple Elements Higher score for avoiding impacts, minimizing risks, exceeding minimum standards No prerequisites Target score established in design manual 17
Brainstorming, Vetting, Prioritizing 18
STORMWATER MANAGEMENT CRITICAL NATURAL RESOURCES SITE STABILIZATION ADDITIONAL NATURAL RESOURCES PLANTINGS INNOVATION 19
CRITICAL ENVIRONMENTAL RESOURCES Streams Water Bodies Floodplains Riparian Buffers Tree Canopy ADDITIONAL NATURAL RESOURCES Ephemeral Channels Additional Buffer Width Tree Protection Impervious Cover Steep Slopes SITE STABILIZATION Erosion Control Volume Disturbed Area Silt Fence Sedimentation STORMWATER MANAGEMENT Non-Structural Controls Green Infrastructure Water Quality Treatment Runoff Volume Flood Control Nutrient Loading PLANTINGS Native & Drought Tolerant Landscaping Restored Tree Canopy Amenities Soil Preservation Tree Root Zone INNOVATION Education Pilot Projects 20
Category Weighting Watershed Benefit 2 2 5 5 4 3 CATEGORY: 6 10 MAXIMUM DROUGHT STREAM BUFFER POINTS TOLERANT PROTECTION PER LANDSCAPING SUB-CATEGORY 14 10 4 15 10 10 10 8 8 5 3 3 18 20 18 20 10 5 Community Benefit 21
Scoring Points Wet Pond Design Flood Control : Nutrient Reduction: Runoff Reduction: Native Plantings: Amenities: Education: 10 10 7 7 5 6 2 5 0 5 0 2 Total: 25 35 22
Calibration Natural Natural w/ Additional Study Conventional Development Chatham Park Standards Critical Environmental Resources 100 100 73 81 Additional Environmental Resources 8 21 3 4 Site Stabilization 0 0 0 0 Stormwater Management 41 41 17 27 Plantings 4 4 3 9 Additional Measures 0 0 0 0 Total 153 166 96 121 23
Community Environment 24
QUESTIONS & DISCUSSION 25
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Example Calculation Stream Length 20 Points % of total length preserved Example Total length of Perennial & Intermittent Streams = 1500 LF 165 LF of Stream Impacts (3 Road Crossings) = 1335 LF Preserved Equation: 1335 / 1500 = 89% 89% * 20 points = 17.8 points 27
PROGRAM DEVELOPMENT CASE STUDIES & CALIBRATION 28
2015/2016 Public Meetings Leading the way for innovation in stormwater management 29
140 Exceptional Stormwater Design Evaluation Case Study Comparison 120 100 Exceptional Development Standard Development 80 60 40 20 0 Pittsboro Standards Chatham Park Standards Critical Environmental Resources Additional Environmental Resources Site Stabilization Stormwater Management Plantings Additional Measures 30
TOWN INITIATIVES CASE STUDIES & STEWARDSHIP 31
Tree Canopy 32
Impervious Cover Education Stream & Buffer Impacts Green Infrastructure Flood Control 33
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How to score points POINTS POINTS POINTS 36
Stacking Points POINTS POINTS POINTS 37
PROGRAM DEVELOPMENT PLANNING BOARD BOARD OF COMMISSIONERS IMPLEMENT GOALS & RESEARCH DEFINING EXCEPTIONAL STAFF INPUT CASE STUDIES CALIBRATION ROLES & RESPONSIBILITIES BOARD INPUT & COMMENT TRAINING MEANS & METHODS STAKEHOLDER INPUT PERMITTING REVISIONS ELEMENTS (ORDINANCES) CONSTRUCTION ADOPTION REVIEW & REVISE MONITORING APPROVAL VERIFICATION 38
Question & Answer Session Question: What are critical environmental resources? Chatham Park s Answer: Streams Water Bodies Floodplains Riparian Buffers Tree Canopy 39
PROGRAM DEVELOPMENT PLANNING BOARD BOARD OF COMMISSIONERS IMPLEMENT BOARD INPUT & COMMENT ROLES & RESPONSIBILITIES TRAINING GOALS TRAINING & RESEARCH STAKEHOLDER INPUT MEANS & METHODS PERMITTING PERMITTING DEFINING REVISIONS EXCEPTIONAL ELEMENTS (ORDINANCES) CONSTRUCTION ADOPTION STAFF INPUT REVIEW & REVISE MONITORING CASE STUDIES APPROVAL VERIFICATION CALIBRATION 40
PROGRAM DEVELOPMENT GOALS & RESEARCH 41
Watershed Health Cycle Watershed Health Natural Establishment & Maturity Adaptation & Re-Growth Time Disturbance & Impact 42
PROGRAM DEVELOPMENT CODIFYING EXCEPTIONAL 43
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STORMWATER MANAGEMENT Runoff Volume Flood Control Nutrient Loading Non-Structural Controls Green Infrastructure Water Quality Treatment PLANTINGS Education Pilot Projects Native & Drought Tolerant Landscaping Restored Tree Canopy Amenities Soil Preservation Tree Root Zone INNOVATION 45
Ephemeral Channels & Buffers Additional Buffer Width Tree Protection Impervious Cover Steep Slopes SITE STABILIZATION ADDITIONAL NATURAL RESOURCES Erosion Control Volume Disturbed Area Silt Fence Sedimentation 46
Scoring Points - Implementation STREAM & BUFFER IMPACT SCORE 34 47
Scoring Points - Planning CRITICAL ENVIRONMENTAL RESOURCES SCORE 81 8 48