HYDRO24874 - Laserfiche WebLink

Home Browse Search

iii iiiiiiiuiiu iii 999 Matthew Janawiak To: John MorranelKRF01C01BLM1001@BLM 03121102 12:09 PM ce. Suhject: Re: Plugging Kerr Monitoring Wells[?j John, I should add that by leaving these wellbores unplugged, there will be a potentially significant loss of any coalhed methane resource it coalhed methane is present in economic quantities. In effect, these wellbores would he open conduits from the gas reservoir to the atmosphere. CBM development test wells may be installed in the monitoring well locations by reaming the monitoring wellbores, removing the PVC and sloughed material, and installing a production test well. Regardless of future plans, the monitoring wells should be plugged. Matt Jahn Morrane JohnMorrone Ta: MatihewJanawiaklDUFOlCOlBLMfD01@8LM ~~ 03121102 11:51 AM cc: James EdwardslCOSDICOIBLM1001@BLM, Dennis GaIeIKRF01C01BLM1001@BLM, Paula ~ BelcherlKRF01C01BLM1001@BLM j ~ Suhject: Re: Plugging Kerr Monitoring Wells6 Matt, thanks for the info. I will save and forward to other agencies as appropriate. Your expertise and rapid review is greatly appreciated. please ignore my E-mail of 3121 11:20 AM- as I just got this. Matthew Janawiak Matthew Janowiak To: Jahn MorronelKRF01C018LMID01@BLM 03121102 08:06 AM cc' Suhject: Plugging Nerr Monitoring Wells John, I reviewed the report you sent. The fallowing statements in the report are key to evaluating [he graurtdwater resource: Page 2.04.712, middle of first paragraph: "Where the Coal aquifer is not faulted, it has an average permeahility of 3.8 gpoltt2, storage coefficient of 6.6x10-4 and an average yield of less than ten (101 gpm." Page 2.04.712, end of the first paragraph: "These values indicate that the Sudduth Coal Seam is a confined artesian aquifer and, where it has been locally fractured by faulting, the coal aquifer can store and transmit water in sufficient quantities for beneficial use." Pape 2.04.7-23, Tahle 18, TOS for Baseline Coal Aquifer "Min 168, Max 2750, Mean 691.9" These points illustrate 111 the coal aquifers are hydraulically separated from underlying and overlying aquifers,121 the coal aquifers can supply enough flow to a well, even where there is no faulting or fracturing (less than 10 gpm is certainly a useable quantity of water for many uses), and (31 the water quality meets drinking water standards in many parts of the coal aquifers. The report also states that where the aquifer is fractured, wells have "...an average yield of more than 20 gpm." I would say that the report you've given me provides plenty of information to support the following conclusions: 1. Groundwater is present in sufficient quantity and quality tc require protection of the resource 2. The coal aquifer is hydraulically separated from other aquifers by confining units 3.Open holes to the aquifer present a risk to this resource that should be mitigated through proper plugging The report certainly doesn't present any data the support an argument for a relaxation of the requirement to properly plug the monitoring