04-16-1984 Planning Packet - Laserfiche WebLink

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, cul de sacs be graveled sements. uts § $200). roughout the ;^e covered or » road tad showing a TO: FROM: DATE: Jeanne A. Mabusth, Zoning Administrator Michael P. Gaffron, Assistant Zoning Administrator April 12, 1984 SUBJECT:Review of Septic Testing Report Submitted for #816, Lake Minnetonka Homes Subdivision I have reviewed the information submitted and wish to make the following comments: Lot 1, Blr^k 1 - testing for this lot was reviewed by me on August 26, 1983, with the following comments: The tested sites are located centrally within this lot. Both primary and alternate sites are suitable for a shallow trench drainfield system (no deeper than ].8"). Due to somewhat high water tables (mottling observed at 2’9" in one hole, 3*5* to 5*5* in others) a curtain drain will be necessary on this site at a depth at least 3' below the trenches. No other sites on the lot appear suitable for a trench drainfield system, so these sites must be preserved. Extra care must be taken in house placement since the sites are centrally located on the lot. A system design for a five- bedroom home has been submitted. Lot 1, Block 2 - testing for this lot was reviewed by me on August 26, 1983, with the following comments: The tested sites are in the northwest corner of the lot. Primary and alternate sites are adjacent to each other. Mottling was noted at depths ranging from 42" to 56" indicating some seasonal saturation. The sandy soil types indicated and the genreal slope to the south will allow the use of a shallow trench drainfield on both primary and alternate sites as long as a curtain drain is installed. The average perc rate for the entire site is about 10 MPI. A pumping station will be needed to deliver effluent to the tested drainfield sites. A suitable design proposal for a five- bedroom home has been submitted. Lot 2, Block 2 - the testtid sites are located in the southeast corner of the lot. Primary and alternate sites both were found to contain sandy to silty loam soils, with perched water tables which can be eliminated by use of curtain drains. Perc rates averaged 7.5 MPI. The sites will both likely be suitable for gravity flow from the houses. Care must be taken to preserve the sites due to their location near the proposed road. A system design for a five-bedroom home has been submitted. Lot 1, Block 3 - the tested sites are located on the east central portion of the lot. Soils indicated were loams and sandy loams. Again, layering of the soils has created perch seasonal water tables which can be eliminated Septic T April 12 Page 2 by use c these dr submitte Lot 2, I the lot central] use of c these It trenches are not and hen( In summi alterna on thes< the pro; on the recomme and rop constru