Data Sources
Verify the math yourself.
Federal Sources
U.S. Census Bureau
census.govDecennial 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.govQuarterly Census of Employment and Wages (QCEW); county-level employment data, wage averages, and unemployment rates
USDA Economic Research Service
ers.usda.govRural economy typology codes; rural-urban continuum classifications; agricultural employment trends for Black Hills region
State Sources
South Dakota Department of Education
doe.sd.govSchool enrollment figures by district; per-pupil state funding allocations (~$6,200/student); district boundary data
South Dakota Department of Revenue
dor.sd.govMunicipal sales tax rates (2% standard); property tax assessment methodology; historical tax collection data by county
Wyoming Department of Education
edu.wyoming.govSchool 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.comCommunity 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.govACS 5-year estimates for all 12 cities: population, median age, household income, home values, poverty rate, unemployment
City of Custer, SD
custersd.comMunicipal budget data, zoning information, capital improvement plans
City of Spearfish, SD
cityofspearfish.comLargest city in the network; housing market data, employment base comparisons
City of Hot Springs, SD
hotsprings-sd.comVA hospital employment data, tourism statistics, median income benchmarks
City of Lead, SD
cityoflead.comSURF (Sanford Underground Research Facility) employment data; tech corridor context
City of Belle Fourche, SD
bellefourche.orgAgricultural economy baseline; Center of the Nation tourism data
Town of Newcastle, WY
newcastlewyoming.orgCoal economy transition data; Weston County demographics and employment
Town of Sundance, WY
sundancewyoming.comCrook 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.