Growth and Land Use Planning Analysis for Washington County, Utah

Presented by: Eric D Zimmerman

Study Area

• Southern Washington County, Utah

Purpose of the Study

1) To determine the amount of land available for growth and development

2) To determine where land use conflicts and preferences would most likely occur

Analysis

• Geoprocessing and Analysis was done in ArcCatalog using ESRI ArcToolbox

• The analysis was Raster based using 10 meter cells• The model was based on the Land-Use Conflict

Identification Strategy (LUCIS®) methodology• Raster layers were combined, ranked and weighted

for further analysis

Data Sources

• U.S. Geological Survey• Utah Automated Geographic Reference Center• Utah Department of Natural Resources • Bureau of Land Management • Fish and Wildlife Service• Washington County• City of Santa Clara• City of St. George• Washington City• Hurricane City

Data Used

• NED data• Threatened and endangered species habitat data• Hydrology data• Roads data• Conservation Land data• Parks data• Census data• Hazardous rock and soil data• Wetland data• Slopes greater than 25%

Determining Developable Land

• Parcel Data• City and county Land Use Plans• City and county Master Plans• City and county zoning maps and data• Smart growth practices• Land ownership/parcel data• Aerial photography• Existing developed land

Growth Analysis Results

• Existing Developed Land

Modeling / Analysis

Exclusion Criteria:• Existing developed land• Conservation land• Forest Service land• Wilderness areas• Flood planes• Wetlands• Areas with slope >25%

• TES Habitat• Open water• Scenic lava beds• Dry washes• Federal land• 100 ft setbacks from

ridgelines and mesa tops

Growth Analysis Results

• Hazardous Rock and Soil

Growth Analysis Results

• Favorable and Unfavorable Development Area

Demographic Indicator 2020 2030 2040 2050 2060

Growth Study Area Population 251,517 373,242 502,579 637,156 772,606.0Growth Study Area Housing Units 96,788 142,916 195,188 250,904 309,273Growth Study Area Household Size 2.60 2.61 2.57 2.54 2.50

Growth Study Area HU/mi2 607 896 1,224 1,573 1,939

Growth Study Area HU/acre 0.95 1.40 1.91 2.46 3.03Notes: HU/mi2 = Housing Units per square mile; values include existing and future development

HU/acre = Housing Units per acre; values include existing and future developmentPopulation and housing data was compiled using the Governor’s Office of Planning and Budget, 2008 Baseline Projections.

Growth Analysis Results

• Favorable and Unfavorable Development Area

Demographic Indicator 2020 2030 2040 2050 2060

Growth Study Area Population 251,517 373,242 502,579 637,156 772,606.0

Growth Study Area Housing Units 96,788 142,916 195,188 250,904 309,273

Growth Study Area Household Size 2.60 2.61 2.57 2.54 2.50

Growth Study Area HU/mi2 689 1,017 1,389 1,786 2,201

Growth Study Area HU/acre 1.08 1.59 2.17 2.79 3.44

Notes: HU/mi2 = Housing Units per square mile; values include existing and future developmentHU/acre = Housing Units per acre; values include existing and future developmentPopulation and housing data was compiled using the Governor’s Office of Planning and Budget, 2008 Baseline Projections.

Growth Analysis Results

• Land Use Conflict Analysis Figure-1

Growth Analysis Results

• Land Use Conflict Analysis Figure-2

Growth Analysis Results

• Land Use Preference Area Figure-1

Growth Analysis Results

• Land Use Preference Area Figure-2

GIS -

GIS -Analyzing

GIS -Analyzing

and understanding our world

Conclusion

Questions?

Questions