Laserfiche WebLink
EMCON <br /> <br />15055 SW Sequoia Parkway · Suite 140 · Portland, Oregon 97224 · (503) 624-7200 · Fax (503) 620-7658 <br /> <br />July 1, 1998 <br />Project 41312-001.001 <br /> <br />Mr. Rob Hallyburton <br />Marion County Community Development Department <br />3150 Lancaster Drive NE, Suite "B" <br />Salem, Oregon 97305 <br /> <br />Re~ <br /> <br />EMCON Peer Review of "A Hydrogeology Review of Private Property at <br />10673 Mil1 Creek Road SE, Aumsville, Oregon, in T. SS./R. 1W. - Section 32 NW/4, <br />Marion County" by John Rehm <br /> <br />Dear Mr. Hallyburton: <br /> <br />EMCON reviewed the above-referenced report (dated May 12, 1998) and two subsequent <br />revisions (June 1 and 12, 1998) submitted to Marion County by John Rehm on behalf of <br />Mr. and Mrs. Ball, 10673 Mill Creek Road SE, Aumsville. The report was required by <br />Marion County's Chapter 181 Sensitive Groundwater Overlay (SGO) ordinance. <br /> <br />EMCON's peer review of this report was based on Marion County's SGO ordinance and <br />the March 19, 1998, draft of the manual for completion of hydrogeology revie~ws and <br />studies in compliance w/th the Marion County SGO ordinance, prepared by the Marion <br />County Planning Division. EMCON's peer review consisted in verifying that the final <br />version of the report (June 12, 1998) included the information required by section <br />181.100(A) of the SGO ordinance and that it met the demonstration requirements of <br />section 181.100(B) of the SGO ordinance. <br /> <br />REPORT SUMMARY <br /> <br />The proposed development is a partition of a private property in Aumsville, Oregon. Two <br />residences are planned to be constructed in the partition, for a total of two new domestic <br />wells. The report reviewed the hydrogeologic setting in the project area, and provided a <br />water-use inventory and a water budget. The geologic formations identified at this <br />location are the alluvium (younger and older), the Sardine Formation and the Columbia <br />River Basalt. The target aquifer for the proposed development is the alluvium. The water <br />budget developed for the alluvial aquifer estimates that 70 percent of the estimated <br />available recharge will be used after the proposed development is completed. <br /> <br />P\L:~DATA\ 1312-MAR\001 ~R.EHM-L.630-98ksbenedet:2 <br /> <br /> <br />