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HomeMy WebLinkAboutMARIE ESTATES Lots 12B & 12C S-7538 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION Environmental Health Division CASE REVIEW WORKSHEET CASE NUMBER: DATE RECEIVED: COMMENTS DUE BY: S-7538 March 20, 1984 April 6, 1984 SUBDIVISION OR PROJECT TITLE: Lots 12B, 12C Marie Estates Siubdivision ( ~i: ~'~PUBLIC WATER AVAILABLE ( UBLIC SEWER AVAILABLE ) COMMUNITY WATER AVAILABLE COMMENTS: ~knicipality of Anchorage Planning Departmant 3500 Tudor Road And~orag~, AlasP~ 99507 Attentic~: Mun/cipal Planner Anchorage, Alaska ~995~4 ~ J~e 5th, 1976 t~ / Subject: Soils Evaluation and ~lated Items - Lots 1 Tnru 12, Marie Estates Subc~vision, A replat of Tract l-E, ~9~ley Subdivision, 5th Addition. ~he following infonnation concerning the soils conditions for the proposed ~ sa~zsry r-qe requl~ r=~anns of Ordinance No. 112-72A, Chapter 21; and Title 18, EnviromTental Conssrvation, 18 .AAC 73.060 of the State of Alaska. Test Hole logs and project location maps foll~ t~he text. SITE LOCATI~ AND DESCRIPTION: The approximately 18 acr~ parcel of land to be subdivided is located three-fottrths of a mi] e east Of the Glenn Hi,way near Peter's Creek in Chugiak. The property is overgrown with sm~]l birch in the areas pr~-viously cleared for homesteading. Imrge~r Birch' near the west side of the property appear to be very old. There are scattered spruce o~ the west side. ~he topography is varied du~ to glacial depesits. The center of the plat is generaly flat, sloping steeply to the west at t. he south west end and sloping up to a platteau on t/~e south east side. The north end slope~ up_ gently over a hill and then slopes dm~ tc~ard the Glenn Highway. %~ere ar~ no adverse gr~_~ on the roads, but th~ building lots along Step.hen Circle will probably be located fairly close to the road because of the steeper slopes to the back of the lots o -.~ ' - E~T.qTING ~ZL?.q ~D SUBSL~RFACE DRAIN F/EI~S: The location of existing wells or subsurface d~.~posal ar~as near this parcel are shown on the project location 22~01, e. w~ater~n~as ~n.loca~ted in t.hi.s-a~.a at de.p~, of ~app. roximatelv 170' ~ .zzu De±ow r/%e groun~ surr~. Nelc~borlng subdivisions (not shc~n on the map) hav~ wells ot--~uf~icient capa- city ~o supply a small con,~unity. The existence of a r~liable water source in t~his c~ological area has ~n proven sufficiently to sanitation offic/als in t~he imitate past. Previous chemical and bacteriological testing of existing water sources has indicated that drinking water c~,~!ity se~ndards are satisfied. A~! of t~he subsurface disposal fields in t~e ~.l~s ~'ate vicinity ha~ functioned satisfactorily in the kind of soil typical to proposed subdiv/sion. F/F/.D EXPLORATION: On April 29, 1976 , one 17 foot hole was exuavated with a ~rott, 3/4 Cu. ~d. Ba~d~oe and another hole was started. The equipment broke du~ to the fro ~zen soil and further attenpts to excavate wer~ postponed. On May 20th, a highway augar was tried but was not equi~.~ped with a bit t-hat would go ~illed zn~_a sozls auger nDunr~ ~n ~ .Nod~ll. Delali Drilling Cb. did ~11 ~? _s~am~les and recordin~ soils da~ ~ ~stholes wer~ located as close to ss' ~-Sai-~i~~ ~ was rns~h]e_ 'l ~_ - ruom c~ the subject tracts to locate water and waste wa~er facilities. $ 75 3, 8 APF 0 9 1984 J~ 5, 1976 GEOLOGY: The fhugiak area is located within the Lower Matanuska Lc~land, a part o-~ the Cook Inlet L~.;land physic~;raphic subp~o~ino~_ that bordars Cook Inlet. Five 'major Pleistocine glacial advan~_s along the consequent or subsequent lacu- stoc~ns and alluvial deposits greatly, influenced the present topography of the ar~a. The surficial geologic unit of ~he site appears to be part of the Peter's Creek Fan as it wof<ed through the late Pleistocene lateral moraine deposits. The till of tb~n deposit is con't¥onlv sandy and stonev with oo~bles and boulders co, mun. P~bbl~ and sand predominance but silt and r~ck dust are present to provide a kinder for som~ soils. C~¼hles and pebbles are rounded rather than angular. St~qURFACE OC~3DITIO?~S: %~ne ground cover over the site g~ner~]y consists of from 6 inch~s to a foot of or~c~nic silt filled with roots. Coarse sands and 9rav~]s ~So~£a~ to ~pths of from 6 f~.. to 10 ft.~ generally. %his layer is in-e_ ~spag~d witch cobbles a~d son~ boulders. In~I~h~-~-= extremm south east corner (lots 3 & 4) there is a layer of boulders at a demt_h of 5 to 6 ft. ~hat would not ~11c~; the dr~]] to penetrate, even after 5 serrate attempts. A percolation ~=st vzas at~ .~pted at t~hese t~o lots and the holes c~uld not be kept full of w~r, dura to ~he excellent dr~na~e. Below 10ft. the soil is generally compact and ~nse with slightly higher sil~ contents. No W£ound water was found in any of the ~holes except TH #17. The water that entered this hole appeared to corns f~ r~lting snow just bel~ t~he surface. The lower parts of this hole did not have evi~an~ of water. Perculation-t~sts v~re run on those, test holes that appeared to have the poorest soil contions. The results of the percolation tests s~h~qed that even the worst holes would s ._uppo~ rt underground seepage pits satisfactorily. The soils were r~ted according th the Unified Soils Classification System, and were ~a~loer~d by the results of the percolation t~sts, the ma~hanical analysis, the e~pe._rience of the g~ologi~'st and his observations. Wheme dual soils classifi- cations are sh~n, it is du~ to the instruction listed in th~ Unified Soils ~ssi~on Instructions, but in all cases a soils ~ating is given, based on the analysis conducted and ~hould be the design figure used by future property owners for figuring s~bsurface disposalareas. ~he size of the lots reflects the condition of ~he soils and the ability to absorb waste water effl,~=nts. O~NCLUSION: R~na soils underlying this proposed subdivision will suuport s~o- surface disposal mystems which are properly designed and sized. There is sufficient room on e~ch lot for alternative ~posal areas, should the initial system fail. %~ne soils are suiemhle with respect to foundation bearing capacity for residmntial structures. The soils are generally F-l, F-2 rated for frost susceptability, which is sa~ =factory. Soils tests were run'in the right-of-vray for the proposed roads and roads will be ~signed and cons ,true, ed to reset the cu~z~nt re~ H r~nts for road construction for th~ soils ~-ncoun~ered. Please contact the undersigned if any expansions or clarifications of these data ,~R ~NC~ ¥/ALLA~E. EI~INEERIN~' 4~3c~ T/:U~PA 0,4' 31 0 FIELD ~DD;NG LO~$ ~S3c~ TA~qPA C~RCLE. ANCHOP~G4= , ALASKA /CD -iN 14 ¥/ALLAr.~_ I ~EAIZ. / '~=-.Z/ F..I~G. INE. F..rING 4~3~ TA~QPA CIRCLE. ANCHO~GF_, ALASKa, /cO MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch 6-650, Anchorage, Alaska 99502 ~7G-222'! SOILS LOG- PERCOLATION TEST ~/' SOILS LOG [] PERCOLATION TEST b¢"t"~ '~ ~ ~,3'~'~ SITE PLAN -d ~. ~ i j_ .... ~- I ---~'~-~-~ 8 ~ ' Reading Date Gross Net Depth to Net Time Time Water Drop IF YES, AT WHAT E 14. Readi r~Ses 0 ~ ~~ '-- --,.;--~%.'{e~ 'EROOLATION RATE (minutes/inch, ~ '~~~';~Z** TE~T RUN BETWEEN -- ,, AND __ FT 72 00~, ~7/76} PERFORMED FOR: LEGAL DESCRIPTION: MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch 6-650, Anchorage. Ala. ska 99502 276-222! SOILS LOG -- PERCOLATION TEST FI PERCOLATION TEST ,'_? I 2 3 4 5 6 7 8 § 10 .12 lo SLOPE SITE PLAN ' ~ : [ I : F-: ...... : '-:_7- '.. 'k Ii , F YES, AT WHAT DEPTH? Gross ~-Jding Date Time 16 ,~'.,:,oF 44. ..~-- .:' -:-"- .'/:: .' ;SC. ~ 20 · -'" ~ -' ' ~ ~N~ ~ WA?~ ..~ ' ' ~ ~. M~ / ~¢ Pi ;COLATION RATE Ne[ Time Depth to Net Water Drop _i (minutes/inch) FT CERTIFIED BY:_: "'' __ ........... DATE: _':'~ '"'~ MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch 6-650, Anchorage, Alaska 9950'2 ~76-222! SOILS LOG -- PERCOLATION TEST BI PERCOLATION TEST PERFORMED FOR: LEGAl_ DESCRIPTION: 1 2 3 4 5 6 7 8 9 10 11 ~' :-~ 7:"" .12 14 15 . 16 17 18 19 COMMENTS SLOPE SITE PLAN · ..,., /, L_. %'.,~- .. · . ~: :C/'._ "" ;' ':' [ f:,' c;::. , WAS GROUND WATER _/ ENCOUNTERED? S IF YES, AT WHAT DEPTH? Reading Date Gross Net ] Depth to Time Time Water Drop PERCOLATION RATE FT AND (minutes/inch) FT . MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch ~-650, Anchorage, Alaska 99502 276-~221' SOILS LOG -- PERCOLATION TEST SOILS LOG ~//PERCO LATION TEST SLOPE SITE PLAN 2 3 4 5 6 7 8 ~2 ~3 14 17 18 19 20 ( .. ,,) ./-~ ~,. ~,,.5 ~J~~'¢-' I~ [1~:'~ qL I,~," WAS GROUND WATER ENCOUNTERED? IF YES, AT WHAT DEPTH? COMMENTS Gross Net Depth to Net Reading Date Time Time Water Drop i ,, ?;~t ~o ~ 5//,~' ~ TM PERCOLATION TEST RUN BETWEE Iminutes! nch) 72 006 (7/76) MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch 6-650, Anchorage, Alaska 99502 278-222'~ SOILS LOG -- PERCOLATION TEST PERCOLATION TEST PERFORMED FOR: LEGAL DESCRIPTION: 2 3 4 5 6 7 8 9 .12 13 14 15 !6 t7 18 19 20 ;LOPE '~ i ~' ~L:; IC.< -.,'-{Z~: '-,'"' { IF YES, AT WHAT DEPTH? WAS GROUND WATER / S > : ENCOUNTERED? /~:D L . _- E Gross Net Depth to Reading Date Time Time Water "? ',l i~.: '." ~ :"i :: ' t. -, S'.' :'., i : ~., .... 4! t ~> " q"fi , ' , ....... ,'" -" ': <~ t /i' ' -' ' ~ ....... :'. <./,...., ':'.,,, ~.,/': ,"' ..' TEST RUN BETWEEN, Net Drop l_ : (minules/inchj FT AND ' FT,/ (* ~ ? :" f '- PERF©i--'~.'~ED ~¥: "' . ~ ':. '!., (,,, (¢, ; > > CERTIFIED BY: DA-7 PERFORMED FOR: LEGAL DESCRIPTION: MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION Pouch 6~650, Anchora.qe, Alaska 99502 278-2221' PEHCO LATIOf'~ TEST SOILS LOG -- PERCOLATION TEST 17 18 19 20 SLOPE SiTE PLAN -~3~ C ,'./I IF YES, AT WHAT :>l'-;. ~ DEPTH? TEST RUN BETWEEN Reading Date Gross Time PEFiFOF,'MED R ',": E Net Time '2. Net Drop /minutes/inch) *'",ND FT,; '-' -': 'TH 15 ~P FI:ELD {3OR~:N¢~ LOGS ,.~H E**F.T '*7 OF /0 V/ALLA~,~., EI~6'INEERIN6' 4~3~J TAMPA r-~RCI. F. ANCHOI:V~&F. , ALASKA ~'icipality of Anchorage Planning De~t 3500 Tudor Road Anchorage, Alaska 99507 Attentic~: Municipal Planner Wi~T ,T ~2E ENGINEERING 4839 Tampa Circle S~bject: Soils Evaluation and Nmlated Items - Lots 1 Thru 12, Marie Estates Subdivision, A replat of Tract i-E, Wb~ley Subdivision, 5th Addition. The follc~ing information concerning the soils conditions for the proposed Marie estates Subdivision located near Peter's Creek in 'Chu_oiak, is submitted to satisfy the requirements of Ordinance No. 112-72A, Chapter 21; and Title 18, ~hvironmantal Conservation, 18 A~ 73.060 of the State of Alaska. Test Hole logs and project location maps follow t~he text. SITE LOCATION .AND DESCRIPTION: The approximately 18 acre parcel of land to be subdivided is located three-fourths of a mile east of the Glenn Highway near Peter's Creek in Chugiak. ~he property is over~zuwn with small birch in the areas previously cleared for homesteading. T~rger Birch near the west side of the property .appear to be very old. There are scattered spruce on the west side. The topography is v-uried due to glacial deposits. The center of the plat is generaly flat, sloping steeply to the west at the south west end and sloping up to a platteau on the south east side. The north end slopes up gently over a h~]l and then slopes do~a% t~ard the Glenn Highway. There ar~ no adverse grades on the ro~B~, but the built]lng lots along Stephen Circle will probably be located fairly close to the road because of the stccper slopes to the beck of the lots. EXISTING WELLS ~/?~D SUBSUI~ACE DRAIN FIELDS: The location of exisHng wells or subsurface disposal areas near this parcel are shown on the project location map. An~ple water b~-~ b_~n located in this area at depths of approximately 170' to 220' bel~¢ the 9Yuund surface. Nei_c~boring subdivisions (not shown on the map) have wells of sufficient capacity to supply a small con~'~unity. The existance of a reliable water source in ~his geological area has ~.~n proven sufficiently to sanitation officials in the immediate past. Previous chemical and bacteriolo~crical ~esting of exise{ng water sources has indicated that drinking water quality standards are satisfied. All of t~he subsurface disposal fields in the J~',~tiate vicinity have functioned satisfactorily in the kind of soil typical to this proposed subdivision. FIELD EXPLORATION: On APril 29, 1976 , one 17 foot hole was excavated with a ~utt, 3/4 Cu. ~d. BacP~oe and another hole was started. The equi~=nt broke d~e to the fro ~zen soil and further attempts to excavate were postponed. On May 20th, a high.fay auger was tried but was not equi.~ped with a bit that would go through the rocks and cobbles. On May 22nd thru May 24th, 1976, 21 holes were drilled using a soils auger mounted on a Nodwell. Delali Drilling Co. did mi ] of the soil boring with this auger. A graduate Geologist was on hand during the entire drilling operation, taking samples and recording soils data. The testholes were located as close to possible disposal site areas as was possible, no~Jng property boundaries and topographical features. There is more t~an sufficient zoom on the subject tracts to locate water and waste water facilities. $ ,1_ 2 $ JUL S Ic37r0-' June 5, 1976 (]~C~OGY: The C/%ugiak area is located within the Lower Matanuska Lowland, a part o ~.~Jook Inlet Lowland physiographic subprovince that borders Cook Inlet. Five_ 'major Pleistocine glacial advances along the consequant or subsec~-nt lacu- stocine and alluvial deposits greatly influenced the present topography of the area. ~ surficial geologic unit of t~he site appears to be part of the Peter's Creek Fan as it worked through the late Pleistocene lateral hormone deposits. ~he till of this deposit is co~mDnly sandy and stoney with cobbles and boulders coraron. Pebbles and sand predominate but silt and rock dust are present to provide a binder for sc~e soils. Cobbles and pebbles are rounded rather than angular. SUBSURFACE C~.~DITIONS: ~ne ground cover over the site qaner~lly consists of from 6 inches to a foot of organic silt filled with roots. Coarse sands and gravels tmderlay the suz£ace to ~epths of from 6 ft. to 10 ft. generally. This layer is interspaced witch cobbles and som~ boulders. In the extreme south east corner (lots 3 & 4) there is a layer of boulders at a depth of 5 to 6 ft. that would not allow the drill to penetrate, e~an after 5 seperate attempts. A percolation test was attempted at t~hese t~o lots and the holes could not be kept full of water, due to the e~cellent dra/na~e. Below 10ft. the soil is generally compact and ~nse with slightly higher sil~ con~nts. No ~£uund water was found in any of the holes except ~ #17. The water that entered this hole appeared to come f~-~ melting snow just bel~ t~he surface. The lower parts of this hole did not have evidence of water. Peroolation tests were run on those test holes that appeared to have the ~oorest soil contions. The results of t. he percolation tests showed that even the worst holes would support underground seepage pits satisfactorily. The soils were rated accord/ng th the Unified Soils Classification System, and were ~red by the results of the percolation tests, the mechanical analysis, the experience of the geologist and his observations. Where d,~l soils classifi- cations are shown, it is du~ td t-he instruction listed in the Unified Soils Classifi~tion Instructions, but in all cases a soils rating is given, based on the analysis conducted and s~hould be the design figure used by future property owners for figuring subsurface disposalareas. The size of the lots reflects the condition of the soils and the ability to absorb waste water effi,~nts. CI1NCLUSION: The soils underlying this proposed subdivision will support sub- surface disposal ~3stems which are properly designed and sized. There is sufficient room on each lot for alternative disposal areas, should the initial system fail. The soils are suitable with respect to foundation bearing capacity for residential struct~s. The soils are generally F-l, F-2 rated for frost susceptability, which is satisfactory. S oils tests were run in the right-of-way for the proposed roads and roads will be designed and constructed to ~rrcct the cu~-~_nt re~ts for road construction for the soils encountered. Please contact the undersigned if any expansions or clarifications of these data is necessary. ~? ......... T'Ft 7.. 4lz~lv~ sc~u~ / 5 '~ALLAr,,E. EI',I~IN[F. RIN~ 41~3q TA,~qPA C2RCL.F.. ANCHOI:L, qG.E., ALASKA lo' -FH 4. - E ~DR~:NG LOGS I CALE / // ,~HF-E.T '~ ~ OF /(D TAMPA ¢..JM. CLE. ANCHOP, AG.E, A~-ASKA 15' 4 ~,~ si. i I~ALL.~C.,E. EI~GINE. F..RING- L 4,83q TAF1PA C.,1'~CL.Y.. 7'Hq ANCHOP~G.E., ALASKA TH I0 3z~zo ~ {01 · TH II ~v'ALLAr..F_ E/~C~iNEERIN~ A-~3<J TAI'IPA ~.~RCLE ANCHORAGE., ALASKA .I 0,4 0 E V/ALL^(;F.. £kI&INE.~.RING 4B2~q TAI'qPA C2RCLE. ANCHOI:LqG. F. ~ ALAc~IG~ TH 14 WALL AC.~.. Et,.IGi N EERIN~ ~L I HFT ~ OF ANCHOP, A~F.., ALASKA jl JO ~G FIELD (~DRING LOGS GK_..ALF. / _c~ / LWALLA~,,E. EI4CtlNEF_R|N~ 453Q T~,I PA JSH~T ~ OF ANCHOI:iAGE, /0 /0 4,51 5'/z4-/'7~, WALLAGE. F..I~I&INEER1NG 4~3Cl TAMPA CJln. CLE I SHEET /o OF /0 ANCHORAGE, AI. ASYv~ 0 I August 2, 1979 J. Contreas Planning and Zoning ~Iealth and Environmental Protection Marie Estates Subdivision Soil Test Reports The review of subject as submitted shows soils to be adequate for on-site septic system on Imt llA of this subdivision. If there are any further questions, please contact this office at 264-46~0. John W. Lynn ~%viron~%ental Specialist cc: Robert Johnson Box 456 99577 [ , ~r~ l~.~ity of Anchorag~ Planning Depar~ant 3500 Tt~or ~oad An~horag~, Alaska 99507 Attenticn: Municipal Planner 4839 Tampa Circle Anchorage, Alaska - 99504 June 5th, 1976 Subject: Soils Eva~uation and R~lated Items - Lots 1%?~ru 12, Marie Estates Subdivision, A replat of Tract l-E, ~'~aley Subdivision, 5th Addition. ~e follc~ing information concerning the soils conditions for the proposed Marie estates SubdivisiOn locatad near Peter's Creek in Chugiak, is submittsd to satisfy the requi~ 're~ents of Ordinance No. 112-72A, Chapter 21; and Title 18, ~hvirc~mantal Conservation, 18 A~£ 73.060 of the State of Alaska. Test Hole logs and prDject location maps 'follow t~he text. SITE LOC~TIOW AND DESCRIPTION: The approximately 18 acre parcel of land to be subdivided is located three-fourths of a mile east of the Glenn Highw~? near Peter's Creek in fhugi~k. The property is over~uwn with small birch in the ar~as previously cleared for h~steaa]nm Larger Birch near the west side of . the prope_rty ap. pear to be very old. Ther~ are scattered spruce c~ the west side. ~he topography is varied due to glacial deposits. ~he ~nter of the plat is generaly flat, sloping steeply to the west at the south west end and sloping ~ to a platteau on t/]e south east side. The north end slopes up gently over a hill and then slopes do~ t~.~ard the Glenn Highway. ~ere are no adverse grades on the ro~.~, but t~e building lots alon~ Stephen Circle will probably be located fairly close to the road because 'of the steeper slopes to the back of the lots. EXISTING ~'~.~.$ ;~ND SUBSLq~FACE DRAIn! FI~/LDS: The location of existing wells or ~'~bsurface di ~spos~l areas near this Dar~ ar~ ~hcwn on the project location map. Ample water has been located in this~ ar~a at depths of a~roximately 170' to 220' ~elc~¢ the ground surfak. ~i~hboring subdivisions (not shown on the map) have %~lls of sufficient capacity to supply a small co~,,unity. The existance of a reliable water source in ~his g~ological area has been proven sufficiently to sanitation officials in the i~rediate past. Previous chemical and bacteriolo~crical ~-$ting of existing water sources has indicated tb~t drinking water ~!ity stan6~ds are satisfied. All of t~he subsurface disposal fields in t~e inmsdiate v/~{nity ha~ functioned satisfactorily in the kind of soil typical to this proposed subdivision. FIELD EXPLORATION: On APril 29, 1976 , one 17 foot hole was excavated with a Drott, 3/4 Cu. ~. Bac~e and another hole was started. ~he ~equipment broke due to the fro ~zen soil and further attempts to excavat~ were postponed. On ~Y 20th, a high.~ay auger was tried but was not equi_ ~ped with a bit that would go through the rocks and cobbles. On :.~ay 22nd t~hru May 24th, 1976, 21 holes were drilled using a soils auger ~ounted on a Nodwell. D~lali Drilling Co. did all of the soil boring with this auger. A graduate Geologist was on hand during the entire drilling operation, taking samples and recording soils data. The testholes were located as close to possible disposal site areas as was possible, noting property boundaries and topographical features. There is m~re t~an sufficient r~om on the subject tracts' to locate water and waste water facilities. ~aM~ic~_'pality of Ant ~.ge 1976 o--~ ~t~c~ook Inlet Lo~land physiographic subprovince that borders Cook Inlet. Fiv~ 'major Pleistocine glacial advances along ~he consequent or s~bsequent lacu- stocine and alluvial deposits greatly influenced the present topography of t~he area. The surficial geologic unit of t~he site apuear~ to be part of the Peter's Creek Fan as it wof.<ed through the late Pleistocene lateral m~raine deposits. ~he till of this deposit is con.only sandy and stoney with cobbles and boulders coni~un. Pebbles and sand predominate but silt and rock dust are present to provide a binder for ~ so~ls. Cobbles and pebbles ar~ rounded rather than angular. SUBSURFACE G~3DITI~S: ?ne ground cover over the site g~neral]y consists of from 6 inches to a foot of organic silt filled with r~ots. Coarse sands and grails underlay the surface to depths of from 6 ft. to 10 ft. generally. This layer is interspaced witch cobbles and som~ boulders. In the e~ south east corner (lots 3 & 4) there is a layer of boulder~ at a deDt_h of 5 to 6 ft. What would not allc~ the drill to penetrate, even after 5 se~erate attempts. A percolation test ~ attempt, ed at t~hese t~o lots and the hole~ could not be kept full of water, due to the excellent dra~naqe. Belcw 10ft. the soil is generally compact and ~nse with slightly higher sil~ contents, No ground water was found in any of the holes except TH #17. %~e water that entered this hole appeared to come from melting snow just belc~¢ t~he surface. The lower parts of this hole did not have eviW~nce of water. Pe~-colation tests were run on those test holes that ~ppeared to have the poorest soil contions. The results of t_he percolation tests s.hcwed that even the worst holes would suppo, rt undei-uzound seepage pits satisfactorily. The soils were rated accord/rig th the Unified Soils Classificat/on System, and wer~ tmmpered by the results of the percolation tests,'the mechanical analysis, the experience of the geologist and his observations. ~_r~ dual soils classifi- cations · -.re shown, it is due td t_he instruction listed in the Unified Soils Classifi~tion Instructions, but in all cases a soils rating is given, based on the analysis conducted and s~hould be ~he design figure ussd by future property owners for figuring subsurface disposalareas. The size of the lots reflects the condition of t~he soils and the ability to absorb waste water effluents. (I~CLUSION: The soils underlying this proposed subdivision will support sub- sL!rface disposal s~/stem3 which are properly designed and sized. There is sufficient room on each lot for alternative disposal areas, should the initial system fail. The soils are suitable with respect to foundation bearing capacity for residential structures. The soils ar~ generally F-l, F-2 rated for frost susceptability, which is satisfactory. Soils tests were run in the right-or-way for the proposed roads and roads will be designed and constructed to r~et the-current re~ts for road construction for the soils encountered. Please contact the undersigned if any expansions or clarifications of these data is necessary. The fhugiak area is located wit_~/n the L~r ~.~tanuska I~tland, a part TH I0 ~/z'~h~, TH II WALLACE. Et~G.I H F..ER lNG TAMPA C3 RCI. E. ~L DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PLATTING OR PLANNING AND ZONING CASE REVIEW CASE NUMBER S-5140 PETITION FOR REZONING SPECIAL EXCEPTION VACATION RE"SUBDIVISION DATE RECEIVED May 2:r 1979 COMMENTTO PLANNING BY 5/18/'79 OF Lots llA & .12A Marie Estates Subdivision FOR MEETING OF COMMENTS: ENVl RONMENTAL SANITATION: PUBLIC WATEB-N~ AVAILABLE of Cases PUBLIC SEWER*4¢~ AVAILABLE TO SERVICE PETITION ARE_~._,/ ,/ ENVIRONMENTAL ENGINEERING: 71-014 (9/76) kRr~i~I.~ity of Anchorag~ Planning l~part~mnt 3500 Tudor Poad Anchorage, AlaSka 99507 4839 Tampa Circle Anchorage, Alaska ~99504 June 5th, 1976 Attention: b~nicipal Planner subject: Soils E~[luation and ~mlated Items - Lots 1 ~qru 12, Marie Estates Subdivision, A replat of Tract l-E, ~'~aley Subdivision, 5th Addition. ~ follc~ing information concerning the soils conditions for the proposed Marie estates Subdivision located near Peter's Cre=~k in Chu~iak, is submitted to satisfy the requi. 'remants of Ordinance No. 112-72A, f~aptJr 21; and Title 18, E~vironn~ntal Conservation, 18 7~ 73.060 of the State of Alaska. Test Hole logs and project location maps follcw t~he text. SITE I~D(i~I@; A~3 DESCRIPTION: The approximately 18 acre parcel of land to be subdivided is loCa~ted three-fourths of a mile east of the Glenn Highway near Peter's Creek in Ghuqi~k. The property, is overq~-uwn with small birch in the areas previously cleared for h~mesteadin~. Larger Birch near the west side of the property appear to be very old. Ther~ are scattered spruce on the west side. The topography is varied due to glacial deposits. ~h.e ~-nter of the plat is generaly flat, sloping steeply to the west at the south west end and sloping %p to a platteau on tJ]e south east side. The north end sloFes up 9ently over a h~ !1 and then slooes do~ tc~.~ard the Gler~n Highway. There are no adverse grades on the roads, but t~e buil~n~ lots alon~ Stephen Circle ~ill probably be located fairly close to the r~d kecause 0f the steeper slopes to the back of the lots. EXISTING ~'~/.L$ ~f~D SUBSLqL~ACE DPJkI>~ FIELDS: The location of existing wells or subsurface di ~sposa]l~as near tJTis parcel' are ~hcwn on the project location map. Ample water has ~n located in this area at depths of approximately 170' to 220' bel~¢ the ground surfak. ~ic~%boring s ubdivlslons (not shc~n on the map) have %.~lls of sufficient capa_ city {o stloply a small co,,,~nity. The existanca of a reliable water source in tJ~is q~ological area has been proven sufficiently to sanitation officials in t~he in~nediate past. Pr~vious chemical and bacteriological ~msting of existing water sources has indicated tbmt drir~king water ~] ity - standards are satisfied.. All of t~he subsurface disposal fields in t~e ~ate vicinity have functioned satisfactorily in th~ kind of soil typical to this proposed subdivision. FIELD EX~LOPATION: On April 29, 1976 , one 17 foot hole was excavated with a Drott, 3/4 Cu. ~d. Bac~gaoe and another hole was starta~. %he ~equipmmnt broke due to the frozan soil and further attempts to excavata were~ postmoned. On ~y 20th, a hig~.;ay auger w~s tried but was not ~equim~ed wi~h a bit t_hat would go through the rocks and cobbles. On ~'.~y 22nd t=hru i]~y 24th, 1976, 21 holes were drilled using a soils auger ~munted on a Nodwell. Delali Drilling Co. did a]] of the soil boring with this auger. A graduate C~olc~st was on hand during ~e entire drilling operation, taking samples and recording soils data. %ha test~holes were located as close to possible disuosal site areas as was possible, noting property boundaries and topographical features. There is n°re ~h~n sufficient ~Dom on the subject tracts'to locate water and waste water facilities. lace, P.E. _ mi a ity of , Ju~e 5, 1976 GEOLOGY: 2he Gnugiak ar~a is l~t~ ~t~ ~e ~r I-~ka ~;l~d, a ~~ ~et ~.;l~nd ~ysi~rap~c s~p~ ~t ~ ~ ~et. ~ '~jor Plosive gla~ ~ ~ong t~ ~ns~t or s~nt s~e ~d ~1~ de~si~ ~y ~~ ~e p~t ~hy of ~ s~i~ g~l~c ~it of t~ si~ ~ ~ ~ ~ of t~ Peter's C~ F~ ~ it ~f{~ th~u~ ~e la~ Pleis~e la~r~ ~r~e de~si~. ~e of ~s ~sit is ~y s~ ~d s~ney wi~ ~les ~d ~de~ ~n. ~bhl~ ~d s~d P~a~ b~ silt ~d ~ ~t ~ p~s~t ~ p~ a b~r for s~ so~s. ~bl~ ~d ~bl~ ~ ~d ~er ~ ~. S~~ ~I~.~: ~ne ~d ~r o~r ~e si~ ~era]~y ~is~ of f~m 6 ~s ~ a f~t of or~ic silt filled wi~ ~. Co~e s~ ~d ~a~ls ~rlay ~ s~-fa~ to ~p~ of f~m 6 ft. to 10 ~. ~er~ly. ~s l~er ~~ wi~h ~bbles ~d so~ ~de~. ~ ~e e~ so~ e~t ~er (lo~ 3 & 4) ~e~ is a layer of ~de~ at a ~h of 5 to 6 ~. h~t wo~d not ~1~ ~e ~1 ~ ~et~~, e~ a~r 5 se~ra~ at~s. A ~la~on ~st ~ at~ed at ~hese ~ lo~ ~d the hole~ ~d not ~ ke~ ~1 of wa~r, d~ ~ ~e e~ll~nt ~na~e. Bel~ 10ft. the ~il is g~er~ly ~ ~ wi~h sli~y :~er sil~ ~n~ts. No ~d wa~r w~ fo~d of ~ holes ex~ot ~I #17. ~ wa~r ~t ~ ~s hole ~d f~ ~l~g sn~j~t ~ h~ s~fa~. ~e l~er ~ of ~s ~le ~d not ha~ e~ of wa~r. ~r~la~on ~s~ wa~ ~ on ~ ~st ~les ~t ~ to ~ ~e ~t ~il ~n~ons. ~e ~s~ of the ~la~on tests s~ ~at e~ ~Ie ~t hol~ ~d su~ ~de~ see~e pi~ satisfa~ly. ~ ~ils ~ rat~ a~d~c ~ ~le ~fied ~ils ~si~ca~on Sync, ~d ~ ~d by ~e ~s~ ~f the ~la~on ~s~, ~e ~~ ~ysis, ~ ~e~e of ~e ~l~st ~d ~s obse~ti~. ~ d~ so~s cl~sifi- ~ e.~ sh~, it is d~ td the ~s~on lis~ ~ ~ u~fied Soils ~sifi~on ~io~, b~ ~ ~1 ~es a soils rang is gi~, b~ed on ~e ~ysis ~ndu~ ~d ~ho~d ~ the ~si~ fi~ ~ed ~ ~t~ p~y ~e~ for fi~g s~s~a~ ~s~s~. ~e size of ~e lo~ ~e~s ~ ~n~on of ~he ~s ~d ~e ~i~i to ~so~ w~ wa~ ef~. ~ION: ~e so~s ~rly~g t~s p~sed s~sion ~11 s~ s~fa~ ~s~s~ ~3s~ ~ ~ p~rly ~si~ed ~d size. ~ is s~t ~m on each lot ~r ~ati~ ~s~s~ ~, shoed ~e ~i~ ~ f~l. ~ soils ~ s~le wi~ ~s~ ~ fo~on ~r~g ~ for ~siden~ s~s. ~e soils ~ ~e~ly ~1, ~2 rat~ for f~st s~p~i~, is ~s fa~o~; Soils ~sts %~ ~ ~ ~e ~t-of~v for hhe p~s~ ~a~ ~d ~ ~11 ~ ~si~ ~d ~ns~ ~ ~t ~-r~t ~q~ for ~ ~ns~on ~r ~ soils ~md. PI~ ~nta~ ~e .~i~ed if ~y ~i~ or ~i~catio~ of TH I0 TH II FIELD BORZN(~ LO0$ ] ~CAU~ / ' - .~: SHF--LT ~-- OF WALLAr.~. ENGINEERING 483~ TAMPA C.~P, CI F, ANCHOP,~GE., ALASKA DEPARTMI' ~' OF HEALTH AND ENVIRONMEN'- .L PROTECTION ' PLATTING CASE REVIEW '! COMMENTS TO PLANNING DEPT. REQUESTED BY: NOTIFICATION OF COMMENTS TO ENGINEER AND/OR PETITIONER: DATE' DATE 2. ENVIRONMENTAL 'iENGINEERING: mr N O0° 00'44"W 79-193 - x poA/iflf?D~ -. 0~. ,. 198~ P ~i/ / il /