Frac Sand Mines Are Preferentially Sited in Unzoned Rural Areas
RESEARCH ARTICLE
Frac Sand Mines Are Preferentially Sited in
Unzoned Rural Areas
Christina Locke*
Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, Wisconsin, United
States of America
*
a11111
OPEN ACCESS
Citation: Locke C (2015) Frac Sand Mines Are
Preferentially Sited in Unzoned Rural Areas. PLoS
ONE 10(7): e0131386. doi:10.1371/journal.
pone.0131386
Editor: Yanguang Chen, Peking UIniversity, CHINA
Received: November 21, 2014
Accepted: May 20, 2015
Published: July 2, 2015
Copyright: © 2015 Christina Locke. This is an open
access article distributed under the terms of the
Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any
medium, provided the original author and source are
credited.
Data Availability Statement: A table of mine
locations is included in the Supporting Information
files. Other data for this study were compiled from
third party sources, listed here and cited within the
paper. Data for Fig 1: 1. USGS. 2012. Silica. Minerals
Yearbooks 2002 - 2012. United States Geological
Society. Available from http://minerals.er.usgs.gov/
minerals/pubs/commodity/silica/. Frac Sand Mine
Locations: 2. WCIJ (2013) Wisconsin frac sand
mines, October 2013 update. Available: https://www.
google.com/fusiontables/DataSource?docid=
1gHYVpZPU4L2FabrrdvnUUym7q87HNW9739b
XNfA#rows:id=1. 3. WCWRPC (2013) Frac sand
mines, processing and transloading locations.
Available: http://wcwrpc.org/Frac_Sand/frac_sand.
Abstract
Shifting markets can cause unexpected, stochastic changes in rural landscapes that may
take local communities by surprise. Preferential siting of new industrial facilities in poor
areas or in areas with few regulatory restrictions can have implications for environmental
sustainability, human health, and social justice. This study focuses on frac sand mining—
the mining of high-quality silica sand used in hydraulic fracturing processes for gas and oil
extraction. Frac sand mining gained prominence in the 2000s in the upper midwestern
United States where nonmetallic mining is regulated primarily by local zoning. I asked
whether frac sand mines were more commonly sited in rural townships without formal zoning regulations or planning processes than in those that undertook zoning and planning
before the frac sand boom. I also asked if mine prevalence was correlated with socioeconomic differences across townships. After creating a probability surface to map areas most
suitable for frac sand mine occurrence, I developed neutral landscape models from which to
compare actual mine distributions in zoned and unzoned areas at three different spatial
extents. Mines were significantly clustered in unzoned jurisdictions at the statewide level
and in 7 of the 8 counties with at least three frac sand mines and some unzoned land. Subsequent regression analyses showed mine prevalence to be uncorrelated with land value,
tax rate, or per capita income, but correlated with remoteness and zoning. The predicted
mine count in unzoned townships was over two times higher than that in zoned townships.
However, the county with the most mines by far was under a county zoning ordinance, perhaps indicating industry preferences for locations with clear, homogenous rules over patchwork regulation. Rural communities can use the case of frac sand mining as motivation to
discuss and plan for sudden land-use predicaments, rather than wait to grapple with unfamiliar legal processes during a period of intense conflict.
Introduction
The siting of locally undesirable land uses (LULUs) like mines, waste facilities, power plants,
prisons and feedlots depends on the actions of both industry and local communities [1–3].
LULUs can present a dilemma for rural communities: the potential of increased revenues and
PLOS ONE | DOI:10.1371/journal.pone.0131386 July 2, 2015
1 / 21
Frac Sand Mines Are Preferentially Sited in Unzoned Rural Areas
html. MaxEnt inputs to calculate probability: 4. WDNR
(2011) Groundwater contamination susceptibility
model data. Available: ftp://dnrftp01.wi.gov/geodata/.
5. U.S. Census (2013) TIGER/Line shapefiles.
Available: https://www.census.gov/geo/maps-data/
data/tiger.html. Accessed 28 June 2014. 6. Fry J,
Xian G, Jin S, Dewitz J, Homer C, et al. (2011)
Completion of the 2006 National Land Cover
Database for the conterminous United States.
Photogrammetric Engineering & Remote Sensing 77:
858–864. Data available: http://www.mrlc.gov/
finddata.php. Additional data used in regression
models: 7. U.S. Census (2001) Census 2000
Summary File 1. Available: http://www.census.gov/
main/www/cen2000.html. 8. WDOR (2010) 2009
Town, village, and city taxes. Available: www.revenue.
wi.gov/pubs/slf/tvc09.pdf. 9. WDOA 2011 (2011) 2011
Wisconsin local land use regulations and
comprehensive planning status report. Available:
http://www.doa.state.wi.us/Divisions/
Intergovermental-Relations/Comprehensive-Planning/
2011-Land-Use-Regs-and-Planning-Status-InventoryReport.
Funding: This project was supported by the Forest
and Wildlife Ecology Department at the University of
Wisconsin, Madison (www.wisc.edu), and the
Agriculture and Food Research Initiative Competitive
Grant no. 2012-67011-19876 from the United States
Department of Agriculture National Institute of Food
and Agriculture (www.usda.gov). The funders had no
role in study design, data collection and analysis,
decision to publish, or preparation of the manuscript.
Competing Interests: The author has declared that
no competing interests exist.
job growth on the one hand [3,4] and increased danger, ill health or lowered property values
on the other [2,5]. In many parts of North America and Europe, it is the prerogative of local
governments to regulate—or to not regulate—industrial and other land uses through zoning
[6]. Many rural communities manage land-use conflicts informally, among neighbors and on
an ad-hoc basis, and may be unfamiliar with formal planning and zoning processes [7]. Gradual changes like housing development, a growing commuter population, and other signs of
suburbanization often prompt growing communities to adopt comprehensive land-use plans
and zoning ordinances as reactive measures [7,8]. However, new and drastic changes may arise
even in rural areas that show few signs of suburbanization and are outside of commuting distance to major urban centers. In these cases governments may need to navigate unfamiliar legal
processes during a period of perceived crisis, such as a boom of extractive industrial operations.
Informal agreements may be insufficient means for controlling development when facing new
or stochastic market forces, even in slow- or no-growth rural areas.
This study focuses on a specific type of LULU, the mining of silica sand for use in the
hydraulic fracturing industry (“frac sand mining”). The research objectives in this study are
first to describe and analyze the spatial pattern of frac sand mines, and secondly to explo (...truncated)