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HomeMy WebLinkAboutBERNARD Block 3 Lots 10 & 11 Tract L-1 Plat# 91-108 S-9089 MUNICIPALITY OF ANCHO~GE MEMORANDUM DATE: TO: THRU: FROM: SUBJECT: July 25, 1991 Department of Economic Development and Planning Zoning and Platting John Smith, P.E., Program Manager, On-site Services Department of Health and Human Services j~$~,~ Susan Oswalt, On-site Services ~ Department of Health and Human S~ices S-9089 - Lots 1, 2, 3 Bernard Subdivision Additional Comments We have received all necessary information to complete our review. We have no objection to the proposed subdivision.~ SO/ljm EIVED HEALTH AUTHORITY APPROVALS SEWER & WATER MAIN EXTENSIONS SEWER & WATER INSPECTION ENGINEERING STUDIES AND REPORTS WELL INSPECTION & FLOW TEST SiTE PLANS ROAD DESIGN SOIL TEST PERCOLATION TEST STRUCTURAL & MECHANICAL INSPECTIONS ON SITE WASTE WATER DISPOSAL SYSTEM DESIGN ROBERT SHAVER, P.E. ROGER SHAFER, P.E. July 25, 1991 CIVIL ENGINEERS (907) 694-2979 FAX 694-12t 1 JUL 2 6 1991 ) ZN4GE 4N^LVSZS )M~aicipality of Anchorage BERNARD SUBDIVISION, TRACT L, ~1~ & Human Servic~~ Lot 1,2, & 3, The lotS being considered in this analysis are located on the north facing slope of Stewart Drive on the southfork of Eagl~ River. The lots ar~ currently in their natural state, with Lot I being wooded with spruce and ald~r~ and Lots 2 ~ 3 covered primarily with alders. The ground cov~r consists of natural forest floor region that is common to a w~l drained hillside ar~a. Th~r~ ar~ no ponds, streams or w~ands on any of the lots, however, a drainage easement is required based upon a culvert installation along th~ eastsid~ of Lot 3. All thr~e lots have had recent soil anaylsis and percolation tests along with water monitoring. P~rcolation rat~s are approximately 20 minu~s per inch. There was no groundwat~r encountered in any of the soil test hol~s up to a depth of 14 ft. C~rrently runoff drains from the lots to the north and is eventually intercepted by a ditch along Stewart Drive. The runoff continues in this ditch until it is conveyed beneath Stewart Drive via a culvert and thence into a ditch and stream system to Eagle River. Water only runs in this ditch after a h~avy rain storm or for a f~w days after snow m~It. Currently there exists a 20' drainage ~asement along the westside of Lot 2, Block 3, however, th~r~ is no n~d to co~nue this drainage ~as~m~ south along th~ w~st edg~ of proposed Lot I. Th~ existing drainage ~as~m~nt carries flow from surfac~ drainage and a small spring that originates north of proposed Lot I. As thes~ lots are developed the runoff characteristics of thi~ ar~a will in~vi~blF chang~ from a for~t~d ar~ to on~ w~h rur~ r~id~ c~ra~s~cs. T~ chang~ w~ ~v~ th~ ~ff~ of s~g~y in~sing p~a~ runoff rat~ in th~ v~ry ~m~at~ ar~ w~ b~ of ~ co~qu~nc~ in th~ ov~r~ r~noff chara~$~ of ~ H~and roa~ ar~. T~ ar~ ~ v~ry ~n~bl~ to ~~ity r~r~ d~v~opm~ w~ho~ ~a~on of th~ basic dr~~~~ in th~ v' .... 17034 EAGLE RIVER LOOP, SUITE 204, EAGLE RIVER, tll RE(liVED f' ~JU~ 2 5 1991 Municipality of Anchorage Dept. ealth &Human Serwces l[ ' WELL LOG Date Drilled: ~ ..... ~ ~5 ;986 Static Water Level 56 feet Draw Down N/~ _ feet Blk 3 Lot 4 Bernard Subd. Gal 1 ons Per Mi nute Total Feet of Casing_ '40' __ Total feet of Drilling 229 ~),pe Material Drilled: 0 feet to 7 Clay 7 feet to 34 Dense grau~ly Clay 34 feet to 80 Fractured Rock 80 feet' to 100 Soft brokQn bedrock w/? gpm. 100 feet t0 215 Bedrock 215 feet HEFTY DRILLING 3540 AKULA DRIVE ANCHO~GE, ,AK 99516 (907) 345-0593 RECEIVED JUL 2 5,1991 Munic~pahty 0~ ~,~norage Dept. Health & Human Services o m ?, '0 d' RE~ JUl Munimpal EIV. ED = i ; : ~. 5 i99'1i t~ of Ahch_~. rage &[Human ~. rvi~,s · ~ RECEIVED JUL 2 § 1991 Mun~c,pal,ly ol Allchorage Health & Human Services ASBUILT-NO CORNERS SET THIS DATE. SE~/ARI3 & AS$OCIA~ I HEREBY CERTIFY .THAT I HAVE SURVEYED THE SCALE: FOLLOWING DESCRIBED PROPERTY: AND ~AT NO EN~OACHMENTS EXIST ~CE~ AS INDICA~D. IT IS THE RES~NSIBILITY OF THE OWNS.TO D~ERMINE THE EXISTENCE OF ANY GRID: E~EMENTS, COVENANTS~ OR RESTRICTIONS WHICH DO NOT ~PEAR ON THE RE~D~ ~BDI .... ~ISlON ~LAT, ~NDE~ NO CIrCUmSTAnCES ~ FI: ~Y DATA H~EON BE USED FOR CONSTRUCTION OF FENCE LINES, CE FOE EST~LIS.IN~ ~ND- ANY LINES. MUNICIPALITY OF ANCHO~GE MEMORANDUM DATE: July 19, 1991 TO: Department of Economic Development and Planning Zoning and Platting FROM: SUBJECT: Susan Oswalt, Acting Program Manager, On-s~te Services Department of Health and Human Services .~ Request for Comments on Short Plat Subdivisions July 19, 1991 The Environmental Services Division, On-site Services Section, of the Department of Health and Human Services has reviewed the following cases and has these comments: S-9088: Lots 1, 2, 3 Cabin by the Creek Subdivision #2 The following deficiencies were found with this plat submittal: 1.Show 100 foot setback to the mean high water level of the stream (Little Campbell Creek). 2. Exact locations of all test holes must be submitted. 3. Both test hole ~3 (on Lot 1) and the proposed public'well are shown in the required 30 foot road right of way. We will require a new test on Lot 1 and a relocation of the well. 4.Provide information on water availability for the well. 5. Provide a copy of the ADEC certificate to install a public well. 6.The applicant must designate whether he plans to limit total bedrooms on the plat or designate a reserved area space (Sec. 15.65.180.B). 7. Provide drainage plan which shows possible impacts to proposed on-site wastewater systems. 8. Provide location of all on-site wells and sewer systems wihin 200 feet of the proposed development. This plat has not fulfilled basic requirements under 15.65. We recommend it be returned to the applicant for resolution of the above deficiencies. S-9089: Lots 1, 2, 3 Bernard Subdivision We recommend this plat be returned for additional information. We will require the following: 1. Provide locations of all test holes. 2. As proposed, the route of drainage will seriously impact the development of on-site disposal systems. We request that a comprehensive evaluation be made by a registered engineer, showing potential impacts and proposed mitigation. Department of Economic Development and Planning July 19, 1991 Page Two S-9089: S-9090: Continued . 3. Provide information on water availability if private wells are proposed. If extension of the public water system is proposed, provide copy of the certificate to construction the extension. Prior to final plat, provide a copy of the Certificate to Operate from ADEC. 4. Applicant must designate which provision for reserved area will be utilized for development (Sec. 15.65.180.B). It is our understanding that the applicant has agreed to delay the plat hearing a week so that we can resolve these issues. Amended comments will be provided to Platting within the next week. Lot 8A Block 7 Westgate Park Subdivision No objection. SO/ljm SCALE 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION, ~ ¢ ,,¢ ~~ Township, Range, Section: 1 2 3 4 5 6 ? 8 9 10 11 12 13 14 15 16 17 18 19 20 SLOPE SITE PLAN COMMENTS WAS GROUND WATER ENCOUNTERED? S IF YES, AT WHAT L DEPTH? O P E Depth to Wltor A.~,O~)~_, MonitorJflO? ' ~ Oato: I.~- '~- o~ ~ Reading Date Gross Net Depth to Net Time Time Water Drop PERCOLATION RATE~ (m~nutes/~nch) PERC HOLE DIAMETER TEST RUN BETWE ,F__N/ /t~L"T~ FT AND ~ FT .i / /'"' CT ON THIS DATE. 17034 Eagle River Loop ,<oa~ No. 204 PERFORMED E~'&g!= ?.'.,.:~_.,., Al=~l~a 99~77 I ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES 72-008 (Rev. 4/85) CERTIFY THAT THIS TEST WAS PERFORMED IN DATE:  Municipality o! Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR: DATE ~, I~'~~ Township, Range, Section: SLOPE SITE PLAN WAS GROUND WATER ENCOUNTERED? LEGAL DESCRIPTION:'"T~ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2O S L IF YES, AT WHAT O DEPTH? p E Oeplh to Watar,~. , I Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE __ (m~nutes/~nch) PERC HOLE DIAMETER TEST RUN BETWEEN~/__.../,.~__ FT AND ~ FT i'~':?,'~ ~"~le River Loop RoadNo 204 //~ P'~ ~/ PERFOR~',~ve~, ~.~ ~77 ' ~ ,~ ~ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES ~ EF~ECT ON THIS DATE. DATE: 72-008 (Rev. 4/85) PERFORMED FOR: LEGAL DESCR IPTION"~ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST COMMENTS Township, Range, Section: SLOPE WAS GROUND WATER ENCOUNTERED? S L IF YES, AT WHAT O DEPTH? p E SITE PLAN Depth to Waa' A..~.~.,r~_ , Monitoring? · ~ Dale: Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE TEST RUN BETWEEN . ~ (mtnutes/mch) PERC HOLE DIAMETER / PERFORMED'I~Y:- =: i.. ,lc._ River Loop Road No. 2~ I /'~~ ~ CERTIFY THAT THIS TEST WAS PERFORMED IN ~ iver Alaska 995~ ACCORDAN~ALL ~TATE AND MUNICIPAL GUIDELINES I~E¢ ON THIS DATE, DATE: 72-~8 (Rev. 4/~) / Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR:~ LEGAL DESCR IPTION:~'~-'' 1 2 3 4 5 6 7 8 9 · ~. ~A~_~i~ Township, Range, Section: SLOPE SITE PLAN 10 11 12 13 14 15 16 17 18 19 20 COMMENTS PERFORMED BY: 5 A $ - .............. 17034 Ea~lle River Loop Road No. 204 Eagle River, Alaska 9?577 t ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN 72-008 (Rev. 4/85) WAS GROUND WATER ENCOUNTERED? S L IF YES, AT WHAT O DEPTH? p Depth to Wal~r.~3 , Monitoring? ~'~"~ Date; I Gross Net Depth to Net Reading Date Time Time Water Drop ~ ~'.~ ~ ~5/~' ~/~ DRAINAGE ANALYSIS BERNARD SUBDIVISION S 9089 JUL 1991 TRACT L The lots being considered in this analysis all sit on a north facing slope above Hiland Road in the Eagle River Area. The lots currently are in their natural statler z being wooded with spruce and alders and lots 2 & 3 covered, iq~ alder vggetation. Ground cover consists of normal forest floor vegetation u',fo__u_a~roughout well drained hillsides in the Anchorage area. There are no ponds, streams, or wetlands on any of the lots. Ail three lots have had recent perc tests on them and all perced well with rates in excess of 20 inches per minute. No ground water was encountered in the perc test holes dug to a depth of 14 feet. Currently runoff drains from the lots to the north and is eventually intercepted by a ditch along Hiland Road. Runoff continues in this ditch until it is conveyed beneath Hiland road via a culvert and thence into ditch and stream systems to Eagle River. Currently there exists a 20 foot drainage easement along the access to these lots from Hiland Road. This easement will be extended up the west side of lot gl. Eventually drainage from these lots will be conveyed in ditches along the road on the north side of the lots to this easement and thence down the easement to the ditch and culvert system along Hiland Road. As these lots are developed, the runoff characteristics of the area will inevitably change from a natural forested area to one with rural residential characteristics. This change will have the effect of slightly increasing peak runoff rates in the very immediate area but will be of little consequence in the overall runoff characteristics of the Hiland road area. The area is very amenable to low density rural development without alteration of the basic drainage patterns in the area. MUNICIPALITY OF ANCHORAGE ECONOMIC DEVELOF'MENT AND PLANNING P.O. Box 196650 Anchorage, Alaska 99519-6650 PRELIMINARY PLAT APPLICATION OFFICE USE REC'D BY: VERIFY OWN: A. Please fill in the information requested below. Print one letter or number per block. Do not write in the shaded blocks. Vacation Code 2. Tax Identification No. 3. MIW abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB I~LK 3 LOTS 34). I~J~l~ldml~bl Is~l =o~ ,,zJ~q~l I I I I I1[1111 I " I111 4. IXII"rlMO abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB 8LK 3 LOTS 34) full legal on back page. II]11 I I I III11 5. Petitioner's Name (Last - First) 6. Petitioner's Representative Isl'rl~L~T I~1~1~1~1~1,~ I~olo1~,~1,~1 Ic~l~l~l~¼1~llll I 11 I IIIIII III I IIIIIIIII111 Phone~ ~q~-~30~ Zip ~7~ Phone~ L~'~'~ ~ Zip ~0 7. PetltionArea 8. Propo~KI 9. Existing 10. Grtd Number Acreage Number Number Lots Lots 11. Zone 12. Fees 13. CommunltyCouncil _'~u~-/'-/ B. I hereby certify that (I am) (! h::-_- ~:-_.-. :::_"'.:.".:,,~'_ t: :=.'=r) the owner of the property described above end that i desire to subdivide it in conformance with Chapter 21 of the Anchorage Municipal Code of Ordinances. I understand that payment of the basic subdivision fee is nonrefundable and is to cover the costs a~ociated with processing this application, that it does not a~sure approval of the subdivision. I also understand that additional fees may be assessed if the Municipality's costs to process this application exceed the basic fee. I further understand that a~igned hearing dates are tentative and may have to be postponed by Planning Staff, Platting Board, Pl~lnning C~mmission, or the Assembly due to administrative reasons. , Please check or fill in the following: 1. Comprehensive Plan -- Land Use Classification Residential Commercial Parks/Open Space Transportation Related Comprehensive Plan -- Land Use Intensity t~J/'/~ Special Study ~,,)//~i Environmental Factors (if any): a. Wetland 1. Developable 2. Conservation 3. Preservation Marginal Lancl Commercial/Industrial Public Lands/Institutions Alpine/Slope Affected Industrial Special Study Dwelling Units per Acre Alpine/Slope Affected b. Avalanche c. Floodplain ~'-J/,~ d. Seismic Zone (Har(~ing/Lawson) Please indicate below if any of these events have occurred in' the last three years on the property. f',.)/~ Rezoning Case Number Subdivision Case Number Conditional Use Case Nu ,tuber Zoning Variance Case Number Enforcement Action For Building/Land Use Permit For Army Corp of Engineers Permit E. Legal clescnption for advertising. Checklist 30 Copies of Plat Reduced Copy of Plat (81/2 x 11) Certificate to Plat Fee Topo Map 3 Copies Soils Report 4 Copies Aerial Photo Housing Stock Map Zoning Map Water: Sewer: ~ Private Wells Private Septic Waiver Community Well Community Sys. Public Utility Public Utility 20-003 8lek (Rev. 6/89)IVlOA. 24