CTAP Project Area I-93 Community Technical Assistance Program

Overview Growth context Growth consequences How should we grow? The premise and promise of CTAP

I-93 Secondary Impacts Study Population 40,626 additional population in 29 communities (35,314 in 23 NH communities) 5% additional population overall –7% in NH –12% in smaller Towns (< 10,000 population) 26% 84%

I-93 Secondary Impacts Study Employment 21,527 additional jobs in 29 communities (15,952 in 23 NH communities) 5.5% additional growth overall –6.8% in NH –13% in smaller Towns (< 10,000 population) 17% 83%

I-93 Secondary Impacts Study Land Conversion 20,223 additional acres in 29 communities (18,089 in 23 NH communities) Larger increases in conversion in smaller towns (larger lot sizes) 27% 73%

Growth Segment – Background vs. Secondary Projected Population in 2020: 557,687 Base Growth: 112,567 Secondary Growth: 39,231

Summary – Secondary Impacts Existing (2000) Growth w/o I-93 Growth with I-93 Annual Growth (with I-93) Population373,000101,376136,6906,830 Employment158,30067,26583,2174,160 Land (acres developed) NA46,69864,1563,208

Population Growth in CTAP Communities

Population Trends Census ( : 1.9%/yr.) OEP Projections ( : 1.1%/yr.) I-93 Induced Growth ( : 1.6%/yr.)

Ex-Urban Population Growth - CTAP Communities Population: 141,474Population: 405,889 7X growth (168,112) 2X growth (96,303)

Land Use

Land Use

Land Use

Land Consumption Change in developed land, 1962 – 1998: –From 36,519 acres (7.9%) to 98,417 acres (21.2%) –Increase of 61,898 acres, or 13.3% of the county Average of 1750 acres of conversion per year. Average land ‘consumption’ per unit of development increasing Source: Forty Years of Land Use Change in Rockingham and Strafford Counties, Complex System Research Center and CICEET)

Developed Road Frontage Miles of developed road frontage: Total Road Frontage Developed Road Frontage % Developed % % % Source: Forty Years of Land Use Change in Rockingham and Strafford Counties, Complex System Research Center and CICEET)

Impervious Surface Total impervious area values above approximately 5% are associated with impaired water quality Residential AcresAll Developed Acres % Impervious % % % Source: Forty Years of Land Use Change in Rockingham and Strafford Counties, Complex System Research Center and CICEET)

Traffic Growth Accelerates

Land Use

Land Use

Implications of Existing Growth Pattern Land consumption Environment: air and water quality Travel demand & congestion Road infrastructure and maintenance Energy consumption Community design, character, ‘social capital’ Public health & wellness

Some Key Planning Principles for the Future Concentrate development to conserve land, and to maximize use/efficiency of infrastructure Prevent or limit development in areas with high conservation value, and link those areas in regional networks Move toward multi-density zoning model (rural towns), (Villages & town, mixed use centers/Conservation Zones/Density transfers) Build on brownfields, not greenfields Utilize minimum impact development techniques and green building design Preserve historic buildings and other cultural and community assets Balance job growth with housing supply Encourage development that can be efficiently served by pedestrian, bicycle and transit