Field Office Compliance - Assistance

Assistance ID - 13119
Midamerican Energy - Neal North Energy Center - 310634105
1151 260TH ST., SURFACE IMPOUNDMENT EMBANKMENTS Sergeant Bluff, IA 51054
Woodbury County

FO 3

Report
File Name File Type File Date Note
Comments
1/19/2010 MidAmerican Energy Company is seeking approval from your office to drain the Unit 2 ash sluice line at Neal North Energy Center. The lines must be drained to prevent freezing due to an upcoming forced outage. The discharge will occur during the start of the outage and expected to last for less than eight hours. At this point in time, the date of the outage is unknown however; the outage is eminent and will require draining of the ash line. Missouri River water will be used to flush the lines prior to opening the drains to prevent ash discharge to ground. Once the ash line has been purged of ash and ash pumps have been shut off, the drains will allow to be opened. Approximately 12,800 gallons of river water will be drained. The water will be monitored and contained while the line is being drained. Although the water is not expected to reach the Missouri River, the drains will be immediately closed if the water cannot be contained. The bulk of the water is expected to be contained in a trench which will discharge to the Neal 2 Ash Pond. The remainder of the water is expected to reach ground but not flow off site. Authorization was granted. Asked to note on MOR. TOM ROOS
State of Iowa DNR Home Site Policy
Leading Iowans in caring for our natural resources
Version: 2.3.2.24780