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Home My WebLink AboutMCMAHON #1 General Soil Information g~ ASSOCIA .Tg$ CONSULTING ENGINEERS AFFILIATED WITH ALAS I~A TE~T[J~ B 503 EAST SIXTH AVE. -- ANCHORAGE, TEl.. 272-3628 ,JUL 1.. lu/1 AM I~.PT, O1: ENVIRONMENTAL QUA~IT~ July 12, 1971 w.oo 11838 F. M. Lindsey & Assoco Box 4-081 Anchorage, Alaska Attention: A1 Larsen PROJECT: McMahon Subdivision, 1st Add. Dear Sirs: Thirteen test holes have been logged and selected samples laboratory classified for the purpose of estimating the suitability of the subject area for individual sewage su_bsurface disposal on the snbject project. The attached soils logs indicate the soils profiles. The last entry of each log is a weighted value of the seepage area required ~per bedroom~ 'computed in accordance with criteria established by the Greater Anchorage Area Borough Health Department. The seepage area requirements are summarized below. Hole No. Location 1 Intersection lots 2~7' & 2~ 125 and Ballard Circle ~2 ~ corner lot ~Y 3~ 85 ~ 3 NW corner lot ~-~ g~ 120 ~4 .~ E corner lot ~3~ 125 F5 Center E side lot ~'fQ~ 175 ~6 ~k NE c~rner lot 7A/~ 250 ~7 NW Corner lot ~~ 195 Seepage Area (Sq. Ft./bedroom) ~------~-~--~ SE co~ner lot 9A 235 ~,/~/~ ~/9 NE corner lot~3O 130 7/12/71 F.M. LJ.ndsey & Assoc. McMahon Subdivision 1st Add. Hole No. 10 V'13 Location (No test hole No. 10) Center N side lot ~ ~ Center N side lot ~l~ NE corner lot 21 Seepage Area !~q. Ft./bedroom) 128 25O 125 see log We suggest you have the Health Department review these data for a determination as to sufficiency for the area planned for development. Very hruly yours, ADAMS, CORTHELL, LEE~ WINCE & ASSOCIATES SHEI'7I' OF IV. O. NO. 1.1838 ~ELEV. E~istin_ug G~o~.~:.~d F-2~ B~'ovm~ Damp~ Silty Gz-avelly Fine Sand~ Medium Density~ Rounded~ Naxo Size 2" ~N NFS~ Grey~ Damp~ Well Graded Gravelly Sand~ Medium Densit. y~ Roumded~ Max. Size 3" SW Gz~ab Sample Bottom Of Hole 15.0' Seepage Requirements - 125 Sqo. Ft. 15 16 17 18 ~ 20 21 CLIENT PROJEC~ I4cl,lahon ~]~-~j Addo -.~_.- W.O. NO. 11838 SHEET OF DATE 21 June 1971. F-2~ B~own~ We~ .Well-Graded Sil____.ty Gravelly Sand, Occasional Cobbles~ Hedium Densi'cv~Rounded & Subangular~ l,!a×o Size 6", 6*' O~?ganic Overburden F~I.~ Brown~ Wet~ Well~Graded S__.i~tj! Sandy_ Gravel~ P[edi~r~ Density~ Occasional Cobbles.~ Rotu~ded & Subangular~ Hax. Size 6" GW I~FS, Br_own~ Damp~ Well=Graded Sandy Gravel~ }4ediu~] Density~ Occasional Cobbles~ Rounded & Subangular, Hax. Size 6"s Trace Of Silt, GW Grab Sample Bottom Of Hole 12.0~ Seepage Requirements ~ 85 Sq. Fro 21 u, PROJEC'iLMcF[ahon Subd_a. Add, W.O. NO. I 1838 ~ Frost 1~5'~2o5~ F=4~ Bro~pn~ Damp~ GravellZ Sandy Silt, Soft To Stiff Few Cobbles~ Rmmded~ Max. Size 6"~ 6" Peaty Overburden~ Pi= Grab Sample NFS~ Brown~ Damp~ Well-Graded Sandy Gravel~ With l~,~qny Gobbles & Few Boulders~ Rounded~ Max° Size 12" Grab Sample F,~I~ Brovm~ Damp~ Vez'y Sil'cy_ Sandy Gravel,~ Few Cobbles~ High Density~ Rounded~ Haxo Size 6" GM Bottom Of Hole 13.0' Seepage Requirements ~ 120 Sqo Ft. ~ ,"w~-~ St4EET OF ~ PROJECF~:}eHahon Subd~ Add. ~ W.O. NO. 1 838 z m T. tf ~. 6 ELEV. Existing Grotmd F=4~ Brown~ Damp To Saturated~ Fine Sandy Sil_~t, Sof~ Some Roots~ Dilatent~ NFS~ B~;oxw.~ Damp, Well-Graded Graveltv~ Sand With Trace Of Silt~ l'4edit~n To High Density'~ Rounded~ Max~ Size 1" Grab Sample F~4.~ Brown/Grey~ Damp~ Very Gravelly Very Sandy Sil_t. Ifedium Density, No P!asticity~ ~.ounded & Subangular HaXo Size 3" Five 1"~2" Lenses Of Gravelly Sand SW Grab Sample Bottom Of Hole 13o0' Seepage Requirements - 125 Sq~ Ft. t 22 23 24 '-~J25 PROJECT~ [~'2.:~d~-~"~ Subdo Add. T.H. .,4~_ .5 ,ELEV. E~xistir!~ Ground S} IE ET OF DKFE 23 Jtme1971 ~ w. o. NO._~ 1__1_8_~ 8 ~ F~4~ Brovm~ Damps Fine_S..~?dy SilJl F=2s Brovm~ Damp~ Gravelly Silts~ Fine Sand~ Medium To High Density Gr'ab Sample NFS~ Brox,m~ Damp~ Gravelly Sand~ ~redium Densit¥~ Rounded~ Max, Size 1"~ Occasional ~in ~mses Of Silty Sand~'SW Grab Sample F~2~ Brown~ Damp~ ~ Fine Sand~ Mediom. To High Density~ Trace Of Gravel~ Bottom Of ttole 14o5' Seepage Requirements ~ 175 Sq. Fro ~ 2o .{~ SitEE'r CLIENT Lirtdsos_[ & Assoc. DATE 21 Junel 971 PROJEwJ2 ~.,c:Naho~:'~ Su~ Add W.O. NO. 11838 T. H.~ 6 - *' = " Ground grox,m~ Dam¢~ ~ganie gi.l~ ~erburdon With Roots - B>:own~ Damp~ Fine Sa!Bdy Silt, Trace Of Gz.a'vel, __ ooft~ _ D~..a~ent, No Plastiei~z~~ k~ost 2,0~3,0~ F~4~ Bro~,rn~ Damp~ Very Silty Gr'avel!v Sand~ With Occasional Cobbles & Few Boulders~ ?~edium To High Density~ Subangular~ Max~ Size i2"~ 6u I~ayer Of Gravelly Sand (a 10o0~ SM Grab Sample Bottom Of Hole 14~0~ Seepage Requiremengs - 250 Sq. Ft. ' ' //~ SI tEET OF ~'~ CLtEN'~ .~_,D~;_-?.~'~~-- , ~ Assoeo ~---;/--- DATE 23 J~lne. 1971 PROJECT ~_4~'4ahon Subdo Add o ,~__~ W.O.NO. 11838 F~4~ Brown~ Damp~ Fine Sandy Silt, Soft~ Pi~ F~2, Bro%m~ Damp~ Silty Fine Sand~ Medium Density~ Fo4-~ Brovrn~ Damp. To Dry~ Fine Sandy Si. lt~ Hard~ No Plasticity~ SM ~rab ~ample NFS~ Brown~ Damo~ Well-Graded Gravelly Sand~ Medium Density~ Rounded~ Max. Size 1"~ SW Grab Sample Bogtom Of Hole 14.0~ Seepage Requirements ~ 195 Sqo Ft. 19 -- 20 21 22 24 ~ 25 PROjEC'£.k_??.?4ahon Subd~ Add° SHEET OF DATE 21 June 19 71 w. o. NO. I.._LL.. 838 _ELEV. Existin~ Gz~ound F~4, Brovm~ Damp~ Fine Sandy C~ravell~_ ~ Silt~ Stiff~ Dilatent~ No Plasticity~ t~oundedz 14'axo, Size 3" ~1 Brovm.~ Da n Vet S~,I t Sand ' Gravel l~tith Occasional Cobbles &~ Few Boulders. ~ }~edit~n High Density~ Rounded & Subangular~ Hax, Size 12% GM Grab Sample Grab S~nple F~4~ Brovm/Grey~ Damp~ Gravelly Samd~_ .qilt~ Hard~ No Plasticity~ Rounded~ Ma~-., .qize 3"~ SM Bottom Of Hole 13~5' Seepage Requirements - 235 Sqo Fro F.-4~ Tan~ Damp~ Fine ~_a*~dyj Silt~ Occasional Gravel Grab Sample Grab Sample N~;'::~,_~ C,~ey/B~own~, Damp~ Fine. Sandy Gravel, ],.lax~ Size I" GW ta~4 Tan.~ Wet S~ High Dilatency~ Trace Of Clay I,qg Grab . ampl. e~_ i~'S~ Grey~ Damp~ G~ave_l~. San__d, Max, Size 1 1/2", Coarse To Medium Sand, SW (~rab Sample NFS~ Brovm/Grey~ Damp~ Fine Sandi SP Bottom Of Hole 12o5~ Seepage RequJmements ~ 130 Sq~ Ft, CLIENT l,i.~ & Assoc. DATE 6 Jul.}l 1971 T. H..~~ ......... ELEV. Existing ~round F-4~ Biyown~ Damp~ .Silt Wi~h 6" Peat Overburden NFS, ~rey~ Damp~ G~:avol With Numerous Cobbles & t~ulders NFS~ Bro~ Damp~ Fine .Sand~ Occasional Gravel To SW Grab Sample Grab Sample N~S~ Gmey~ Damp~ Sandy ~ravel~ Max~ Size 1"~ F~4~ Tan~ Damp~ S~ ML Grab Semele Bottom Of ttole 12,5~ Seepage Requirements * 128 Sq, ,' SIH£ET OF ~ PROJEC'J~ Mci"Dxhon Sub~-o Add. W. O . NO, 11838 u~'l z F--4, B~:'ox.m~ Damr~, Fine Sandy a_lt~ Soft To Stiff~ Dila~ent~ No Plas~jJ~ Trace Of Peat F~I~ Brown~ Da%ap~ Well-Graded Si}~Sz Sandy Gravel~ With Occasional ¢:obbIes~ Piedium To High Density~ Rounded & Subangulalc~ l~[axo Size 6"~ NFS Layers 1~5~2~5'~ 3o0~4~0~ Parc~.al._.y tr. ozen @ 5~0~7o0' F~2~_ Brovm/Grey~ Damp~ Silty Gravelly Fine Sand~ High Density~ l%ot~aded & Suba~:~gula~ M~Xo Size 6"~ Few Cobbles (~ 9~0~ oH G~ab~-~ - Sample Bottom Of Hole Seepage Requirements ~ 250 Sqo Fro /'~ x,~" SHEET OI" ~ PROJEC'Ii McNehon ~ubo, Add oN~_~ W.O. NO. 11838 F~4~ Bro~cn~ Damp~ o~.1~ Sof~;~ 6~' Peat Over'burden NFS~ Grey~ Damp~ Sand].~ G~-avel NFS~ c~rev~ Damp~ Gx:*avelly Fine Sand~ Max, Size SW Grab Sample Bottom Of Hole 13o5' Seepage Requirements ~ 125 Sq. Fro m PROJEC~~Z!~t~ Add, ~.~ W.O NO.~838 u~ ~ T.H..~ 14 ELEV. Exiatina Ga'ound ~ F=4~ Brot,m~ Damp~ Silt~ With 6" Peak Overburden F~I~ Grey~ Damp~ Silty Sandy Gravel F~4-~ Brovm~ Damps_Si. it Water Table @ 6o5~ During Drilling (Spring) NFS., Grey~ Wet., GraYelly Coarse To Fine Sand., Size I u Grab Sample F~4~ Tan~ Saturated~ Silt With Trace Of Sand~ No Plasticity Grab Sample Botgom Of Hole 12o5~ Not Suitable Because Of Water Tabie~ May Require Special Treatment. September 8, 1971 F.~. Ltndsey & Associates 2502 W. Northern Lights 8oulevard Box 4-081 ~ Anchorage, Alaska Proposed Addition #l to HcMahon Subdivision. Deer Hr, Larson: The Greater Anchorage Area Borough, Department.of Environmental Quality has reviewed the soils reports for the subject subdtvi- $t00. : Prior to our approval of the area as being suitable for indivi- dual sewer and water systems on all lots, the following addition- al information is to bm provided to this office, l. Additional soils analysis will be necessary at the following- locations; in the area of testhole #2, in the area of testhole #6, in the area of testhole #9, and in the areas of testholes #12 and 13. 2. We also find it necessary to require that your firm shmw a diagram of where you recommend alt sewer and water systems to be placed on all of these lots, Should you have a)~y questions regarding the above conditions please contact the undersigned. Sincerely, Roll Strtckland, R.S. Assistant Director Dick Glasheen st