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Appendix B

Data Sources

Verify the math yourself.

Federal Sources

U.S. Census Bureau

census.gov

Decennial Census (2000, 2010, 2020) population counts; American Community Survey 5-year estimates for demographics, income, housing, and poverty rates

Bureau of Labor Statistics (BLS)

bls.gov

Quarterly Census of Employment and Wages (QCEW); county-level employment data, wage averages, and unemployment rates

USDA Economic Research Service

ers.usda.gov

Rural economy typology codes; rural-urban continuum classifications; agricultural employment trends for Black Hills region

State Sources

South Dakota Department of Education

doe.sd.gov

School enrollment figures by district; per-pupil state funding allocations (~$6,200/student); district boundary data

South Dakota Department of Revenue

dor.sd.gov

Municipal sales tax rates (2% standard); property tax assessment methodology; historical tax collection data by county

Wyoming Department of Education

edu.wyoming.gov

School enrollment for Newcastle and Sundance districts; Wyoming per-pupil funding rates; district demographics

Academic Research

Enrico Moretti — "The New Geography of Jobs" (2012)

eml.berkeley.edu/~moretti/

Employment multiplier framework: each high-wage tech job creates ~5 additional local service jobs nationally; adapted to 1.5-1.8x for rural setting

EPB Chattanooga Fiber Study

epb.com

Community economic impact of municipal gigabit broadband deployment; used as comparable for BHC infrastructure investment model

City-Specific Data

American Community Survey — City Profiles

data.census.gov

ACS 5-year estimates for all 12 cities: population, median age, household income, home values, poverty rate, unemployment

City of Custer, SD

custersd.com

Municipal budget data, zoning information, capital improvement plans

City of Spearfish, SD

cityofspearfish.com

Largest city in the network; housing market data, employment base comparisons

City of Hot Springs, SD

hotsprings-sd.com

VA hospital employment data, tourism statistics, median income benchmarks

City of Lead, SD

cityoflead.com

SURF (Sanford Underground Research Facility) employment data; tech corridor context

City of Belle Fourche, SD

bellefourche.org

Agricultural economy baseline; Center of the Nation tourism data

Town of Newcastle, WY

newcastlewyoming.org

Coal economy transition data; Weston County demographics and employment

Town of Sundance, WY

sundancewyoming.com

Crook County demographics; Devils Tower tourism corridor data

Data currency: All data current as of February 2026. Census estimates use the most recent ACS 5-year release. BLS employment data reflects the latest available QCEW quarterly report.