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$ay kv&w Moana <br />w.v:an. ro+newft ss", <br />(612)arf alta <br />October 11. 1974 <br />Mr. Y. H. McCombs. City Engineer <br />City of Orono <br />McCombs -Knutson Associates. Inc. <br />12805 Olson Memorial Highway <br />Minneapolis. Minnesota <br />No: Residential Percolation Test <br />John Burger - 3700 Bayside Road <br />Dear Mr. McCombs: <br />As you requested. we have re-examined the subject site <br />with regard to elevations. The proposed primary drain <br />field. lying northeast of the house site and along the <br />east property line, has its upper (south) end approxi- <br />mately five feet below the ground level at the proposed <br />house. The lower (north) end of the drain field is &p - <br />proximately ten feet below the upper end. or approximately <br />15 feet below the ground level at the house site. <br />This amount of relief indicates a serial -type construc- <br />tion for the drain field. General drain field dimensions <br />should be 30' x 100' with drain tiles running east -west <br />in 30 -foot lengths, seven feet apart. <br />If further data is reavired, please advise. <br />Sincerely. <br />EUGENE A. HICKOK AND ASSOCIATES <br />John A. Holmquist. <br />JAH/cmf <br />cc: J. Burger <br />M. Scheller ✓ <br />