Plains and Eastern Clean Line has proposed and are planning the construction of a 700 mile High Voltage Direct Current Power line stretching from the Oklahoma Panhandle to Memphis. The 600 kilovolt line will have the capacity to move 3.5 GigaWatts of power, equivalent to the output of 5 or 6 coal fired power plants. This represents a major move to deliver excess clean, wind-generated electricity out of the midwest to markets to the east.
Similar projects are in progress to our north, the Grain Belt Express Line will be passing through Missouri on the way to St. Louis and points east and the Rock Island Clean Line which will pass through Iowa and tie into several eastern states.
These projects are not so much about the here and now, but rather the there and then. Multimillion dollar projects take long lead times between inception and completion, usually several years, so they have to be planned with the future needs in mind. The recent requirement by the EPA to reduce our nations carbon emissions only hastens our need for clean renewable electrical energy to replace obsolescent coal fired power plants.
The lines have both supporters and detractors. Environmental groups usually favor the projects as a way to reduce carbon emissions and thus reduce the risk of the damaging effects of global warming. On the other side are land owners who see the power lines marching across their land as more big government intrusion into their lifestyles and even interfering with their livelihoods. Additional arguments against construction of the lines are possible health effects, and the fact that the entities proposing the construction are private companies.
It seems strange that an argument against private industry would be made. The United States to a very large degree operates that way, it’s capitalism, right? Rights of way (ROW) must be secured for these power line projects private or otherwise, just as any project in the public interest such as water lines or a railway. Fair market price must be paid for any property taken for the ROW.
Because these are direct current lines they have a relatively small footprint, at most about 200 feet wide.The total area utilized by the Plains and Eastern Clean Line is about 8000 acres spread over the total roughly 300 miles in Arkansas. The actual land area taken out of service is much less than that as grazing land and hay fields are essentially undisturbed even within the ROW.
Health effects of the power lines relate to several phenomena – Induced magnetic fields, possible corona discharge, and ion production. There is no convincing evidence based on years of experience with power lines that any of the aforementioned causes have health effects.
The magnetic field induced by the proposed line is about the same as the earth’s magnetic field. A few meters from the edge of the right of way won’t even deflect a compass. Power transmission line operators design equipment to avoid corona discharge as it wastes power. With respect to the ions generated, if you worry about power lines, stay away from beaches and waterfalls as they produce even greater numbers of ions.
In the interest in full disclosure I am a member of the Arkansas Chapter of the Sierra Club which has endorsed the proposed power line.