CHATHAM PARK EXCEPTIONAL DESIGN EVALUATION

Transcription

1 CHATHAM PARK EXCEPTIONAL DESIGN EVALUATION 1

2 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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4 A Town within a Town 4

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6 Pittsboro Leading By Example Urban Bioretention Robeson Creek Watershed Plan Retrofits 6

7 Trails Multi Purpose Parks Natural Settings 7

8 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

9 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

10 What is Exceptional Design? EXCEPTIONAL DESIGN STAKEHOLDERS 10

11 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

12 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

13 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

14 Measurable Results 14

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16 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

17 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

18 Brainstorming, Vetting, Prioritizing 18

19 STORMWATER MANAGEMENT CRITICAL NATURAL RESOURCES SITE STABILIZATION ADDITIONAL NATURAL RESOURCES PLANTINGS INNOVATION 19

20 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

21 Category Weighting Watershed Benefit CATEGORY: 6 10 MAXIMUM DROUGHT STREAM BUFFER POINTS TOLERANT PROTECTION PER LANDSCAPING SUB-CATEGORY Community Benefit 21

22 Scoring Points Wet Pond Design Flood Control : Nutrient Reduction: Runoff Reduction: Native Plantings: Amenities: Education: Total:

23 Calibration Natural Natural w/ Additional Study Conventional Development Chatham Park Standards Critical Environmental Resources Additional Environmental Resources Site Stabilization Stormwater Management Plantings Additional Measures Total

24 Community Environment 24

25 QUESTIONS & DISCUSSION 25

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27 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

28 PROGRAM DEVELOPMENT CASE STUDIES & CALIBRATION 28

29 2015/2016 Public Meetings Leading the way for innovation in stormwater management 29

30 140 Exceptional Stormwater Design Evaluation Case Study Comparison Exceptional Development Standard Development Pittsboro Standards Chatham Park Standards Critical Environmental Resources Additional Environmental Resources Site Stabilization Stormwater Management Plantings Additional Measures 30

31 TOWN INITIATIVES CASE STUDIES & STEWARDSHIP 31

32 Tree Canopy 32

33 Impervious Cover Education Stream & Buffer Impacts Green Infrastructure Flood Control 33

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36 How to score points POINTS POINTS POINTS 36

37 Stacking Points POINTS POINTS POINTS 37

38 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

39 Question & Answer Session Question: What are critical environmental resources? Chatham Park s Answer: Streams Water Bodies Floodplains Riparian Buffers Tree Canopy 39

40 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

41 PROGRAM DEVELOPMENT GOALS & RESEARCH 41

42 Watershed Health Cycle Watershed Health Natural Establishment & Maturity Adaptation & Re-Growth Time Disturbance & Impact 42

43 PROGRAM DEVELOPMENT CODIFYING EXCEPTIONAL 43

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45 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

46 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

47 Scoring Points - Implementation STREAM & BUFFER IMPACT SCORE 34 47

48 Scoring Points - Planning CRITICAL ENVIRONMENTAL RESOURCES SCORE