Potential impacts on water quantity, water quality, recreation and tourism have “prompted necessary questions about the mining of Iowa sand for fracking,” state researchers said.
In a new report for the nonpartisan Iowa Policy Project (IPP), researchers Aaron Kline and David Osterberg point out the environmental and aesthetic assets of Northeast Iowa may be threatened by the growing attraction of the area for this specialty sand mining.
“Trout fishing enthusiasts should be worried – but so should anyone who drinks water in the northeastern corner of Iowa. And they are,” said Osterberg, founding director and an environment and energy researcher at IPP. “Local leaders in Winneshiek and Allamakee counties have questions, and given the potential long-term impacts of this mining industry, they deserve answers.”
The new report notes the frac sand mining industry “swept through Wisconsin in recent years, and areas of both southeastern Minnesota and northeastern Iowa have deposits of the same kind of sand sought by the hydraulic fracturing, or ‘fracking’ industry.”
“This sand is attractive to the fracking industry because it is well-rounded and consists of nearly pure quartz, which is highly resistant to crushing,” said Kline, a graduate student in the School of Urban and Regional Planning at the University of Iowa.
“The sand is found, among other places in the St. Peter Sandstone formation along the Mississippi River in Northeast Iowa. You can even see it in many rock outcroppings and bluffs in the region. But if it goes away, so could the scenic bluffs promoted by the tourism industry in that area.”
The researchers also noted the geology of Northeast Iowa includes unusual karst formations that include sinkholes that lose surface water to groundwater sources ¬– and bypass natural filtration provided by soil. So groundwater sources are less protected from the mining activity.
Potential impacts cited by researchers include:
- Declining water quantity, in some areas, due to industry uses of water or mining beneath the water table, affecting groundwater flows, wells and streams, and rising water temperatures in cold-water trout streams that make the region a big draw for anglers.
- Water quality issues, if protection of water resources is not incorporated into the development and maintenance of mining sites, and protections actually enforced. Effects may include pond overflow, site runoff and chemicals reaching water sources.
- Harm to tourism in Iowa’s “Bluff Country” as the degrading of water resources could affect the livelihoods of those who depend on tourism associated with water and natural amenities.
The researchers said there are several options for potential local ordinances:
- Hydrologic mapping, a comprehensive analysis of the area of a proposed frac sand site to determine groundwater flow patterns and the facility’s impact on the area.
- Local well monitoring to determine a baseline level for well quality and quantity.
- Sinkhole setbacks should be required; Minnesota requires a mine site to identify all karst features within 500 ft. and a hydrologic analysis to determine a facility’s impact.
- Trout stream setbacks to protect those assets from significant mining impacts; Minnesota requires a one-mile setback from trout streams.
“As with any form of resource extraction, environmental concerns are associated with industrial frac sand facilities,” Kline said. “Local governments need to be aware of the potential costs of the industry – such as losses of tourism and general aesthetics that can never be recovered – along with the benefits that can be expected to last only over a short time.”
“State leaders should recognize the responsibility, expertise and concerns of local officials in determining what is best for their area,” he added. “Further, state leaders should provide technical assistance to help those local officials determine mining impacts at the local and regional level.”