United States Project

03:00 PM - July 22, 2013

Keystone fatigue? Get over it

Many in media are saying enough already on pipeline debate, but the story is far from over

By Deron Lee

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Over the past 40 years, it has been my good fortune to focus my research on Nebraska's Sandhills and the Ogallala Aquifer. Thanks to the University of Nebraska's Conservation and Survey Division and to the U.S. Geological Survey, I have been able to drill more than 1,000 test holes into the Ogallala formation.
Many people and organizations have asked my opinion about the Keystone XL pipeline's route and its potential impacts on the Ogallala's water riches. My answer is twofold: First, a thank you for their openness to the science of the aquifer, and second, a reassurance that any leak would have minimal impact on the Ogallala Aquifer. Here's the background:
An aquifer usually is defined as any subsurface material or rock formation that stores and transmits water in usable amounts. Underground water by itself is not an aquifer; the definition must include the host material.
Nebraska has many different aquifers; the Ogallala/High Plains system is the largest. Wherever the pipeline is placed, it will go over or through some kind of aquifer. The Ogallala formation is the largest water-bearing unit in the state.
The Ogallala Formation is layered rock, not a lake or a sandpit. Some people say "the lake beneath my feet" when referring to the aquifer. Others think of it as loose sand identical in all directions. These are misconceptions. Our portion of the Ogallala/High Plains Aquifer is made of widely varied sediments eroded off the Rocky Mountains and then deposited in what is now Nebraska by streams and rivers similar to the Platte over a span of 5 million to 30 million years ago. Eventually, those sediments became layers of different types of rocks.
In the western reaches of the state, the Ogallala formation is exposed at the surface. Going eastward, the Ogallala and related rock units dip; the top of the aquifer can be as deep as 300 feet or so below the land surface.
Detailed test-drilling shows that those many layers of sediment that became rock vary tremendously in all directions. Some are heavily cemented siltstones and sandstones that impede the flow of water; others are highly porous sandstones and conglomerates, with the ability to contain vast amounts of moving water between the grains. No matter which direction you drill -- up, down, or sideways -- you'll go only a few hundred yards or so before hitting a different rock type.
In contrast, UNL environmental engineer John Stansbury's report (on worst-case consequences of a spill, released in July) makes the incorrect assumption that the Ogallala Aquifer is uniform sand in all directions and right below the surface. The calculations of a projected 15-mile plume (of leaked oil) did not take into consideration the geology of the aquifer.
The water movement within the Ogallala/High Plains Aquifer is persistently from west to east. Because of gravity and the gentle eastward slope of the rock formations, the aquifer's waters are in constant movement downgradient to the east. The average gradient of the water table within the Ogallala is 10 feet per mile with consistent flow rates of roughly 150 to 300 feet per year.
The pipeline alignment goes over a far eastern segment of the subsurface Ogallala. Roughly 75 to 80 percent of the aquifer is upgradient to the west. That unrelenting eastward water flow means that it would be a physical impossibility for any oil spill to reach the vast majority of the aquifer to the west.
Furthermore, in its report on a 25-year study of an oil spill near Bemidji, Minn., the USGS noted that "fine-grained layers impeded the infiltration and redistribution of oil." If there were a spill along the Keystone XL pipeline, and some of the spill did get into the Ogallala Aquifer, the variability of the aquifer's rock layers means that any spill would be contained within a very small area of that 25 percent of the aquifer to the east of the pipeline.
Yet another consideration is the depth to

#1 Posted by Facts on (and under) the ground, CJR on Mon 22 Jul 2013 at 04:08 PM

John Richardson's year old piece on the pipeline and the dirty oil it's going to pump is worth reading:

http://www.esquire.com/features/keystone-0912

As is this, since few other people seem to be emphasizing it:

http://www.esquire.com/blogs/politics/pipeline-and-gas-prices-072213

"The Keystone XL pipeline will raise gasoline prices in the United States, hiking prices at the pump 20 to 40 cents per gallon in the Midwest, with no long-term economic benefit to the U.S. economy, says a new report by Consumer Watchdog...

The report also found that Canadian crude oil currently being sent to the Midwest from Canada would be easily diverted to Keystone XL to satisfy overseas demand.

Much of the Canadian oil would go directly to Gulf Coast refineries owned by the same multinational companies investing in tar sands, said the report. These companies include Exxon Mobil, Chevron, Koch Industries, Marathon Oil and Shell Oil, said the report. Gulf refineries would refine the tar sands crude oil into diesel oil, which is in high overseas demand, and gasoline for export."

And there's the petcoke issue to boot.

This oil needs to stay, not even in the ground, but as part of the ground. This conflict is between the advocates of profitable suicide vs the people. We can build better energy. We can't if we let the nihilist billionaires drive policy.

We can't if they succeed in wiping out the staples we need to live, our air, our water, our environment, for money.

Those are the stakes.

#2 Posted by Thimbles, CJR on Mon 22 Jul 2013 at 05:04 PM

"... it would be a physical impossibility for any oil spill to reach the vast majority of the aquifer to the west"

"If there were a spill along the Keystone XL pipeline, and some of the spill did get into the Ogallala Aquifer,..."

First you say "physical impossibility", then you backpedal, and say "If there were a spill....and some of it did get into the Ogallala Aquifer"

Skipping over alternative energy, it's our water! We drink the water! The water grows our food! that we eat! Once contaminated, there is no going back. You can't take the color out of the Koolaid.

#3 Posted by Maggie Jones, CJR on Tue 23 Jul 2013 at 04:24 PM

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