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Home My WebLink AboutTHE HIDDEN HILLS S-11463-1The Hidden Hills 5-11463-1 r --IST an *—� I 141 I c l i t i2%I i I I I __� ,n• r•'i^��— I I° I Y Y51I f I z I �� —t' r ''C y I L.w1i. r•w wi �, ,4 L' � �/ p Y •, �,' ',jt \\ ��agart I 1 • l a I� l a �I YI .\\ Bv�i � •�f i l .. � ii I \� ---y f --i y3.—r 1� � � .r• _ rye ^Y ,, wC ✓, /r •'j"� •� a��{`'�y�. I rl=L�..�',i ''•ism♦ %!!/ �� al i�s;i L�—.: _'�•=.'moi_'.. L_.�. a•�'. '/- '-' - _ :r %"L'T_�.—�Jt I ,��1!^11I ee�.4 I Imo. �•wC•n:: / � %' � y,/ ° I 4raaa► 1 ��L_ia•-�L�jy,S ��'i u• �C .�` ;',.i s9�4t Municipality of Anchorage ='` • Development Services Department A` Building Safety Division < MENioRANDUNI DATE: March 13, 2006 TO: Jerry Weaver, Jr., Platting Officer, CPD FROi\I: Daniel Roth, Program Manager, On -Site Water and Wastewater Program SUBJECT: Comments on Cases due March 17, 2006 The On -Site Water & Wastewater Program has reviewed the following cases and has these comments: S10549-3 Ridgemont Subdivision No objection S11440-1 Cross Estates Subdivision Comments to remain the same as previous memorandums S11446-2 Aurora Subdivision Comments to remain the same as previous memorandums r£ S 1 I463 =1='=The Hidden hills Subdivision) No objection. All lots to be connected to public sewer & water S11465-1 Park Subdivision No objection S11468-1 Alaska Seafood International Subdivision No objection (& Rodney t Kinney Associates, inc. 104961 6a ras a aarunrt June 1, 2006 Municipality of Anchorage Department of Public Works Onsite Water and Wastewater 4700 South Bragaw Street Anchorage, Alaska 99507 Project No. 05 -RK -1451 RECEIVED JUN 2 12006 MUNICIPALITY OF aALESV16ESDIVSION Attention: Mr. Dan Roth Subject: The Hidden Hills Subdivision, Addition No. I Plat Case 5-11463-1, Planning Staff Analysis Department Recommendations Dear Mr. Roth: The intent of this letter is to submit information to MOA Onsite Water and Wastewater to address special conditions by the Platting Authority, please reference the attached letter dated April 13, 2006 and Summary of Action, Item 17 from the Department of Planning, Zoning and Platting Section. The subject lot is 1 acre, well forested and has an average slope of 18 percent that slopes to the west. The elevations vary from El. 375' at the south west corner to EI. 324' at the northwest corner. The attached site plan, Figure 1, indicates the lot layout, contours, test hole location and designation for an original and replacement sewer disposal system. A copy of the Preliminary Plat is also attached as Figure 2 that shows the lot location relative to the proposed subdivision. Based on our research and site observations, there are no known Class C wells within 100 feet, Class B wells within 150 feet, or Class C wells within 200 feet of the test hole location or property lines of the lot. We investigated on-site water availability for a well. We obtained limited well documentation from the MOA On-site Database (see attached) that indicates a well on Lot 5, Block 1, Dale Briggs Subdivision which is located approximately 2000 feet northeast of the subject lot. We also queried the DNR data base (WELTS) with no results within Township: 14N, Range: 2W, Section: 12, Seward Meridian. Based on our knowledge and experience, wells in the general area frequently encounter water betnvicen 100 feet to 200 feet below the ground surface and typically provide sufficient capacity to meet minimum MOA requirements. 1115151ntartlel11rlaa ■ 11111111 ■ 1a11a Haar. Alaska a 55577 511.554.2272 ■ fax 551.514.1157 ■ www.rlta.tal The Hidden Hills Subdivision, Addition No. I Plat Case 5-11463-1, Planning Staff Analysis Department Recommendations Pace 2 of 2 A test hole was completed at the subject lot, reference Figure 3. The location is shown in Figure 1. The soils consisted of deposits of granular material including gravels and sands with silt (GM). No groundwater or bedrock was encountered at the bottom of the test hole which was terminated at a depth of 17' below ground surface. Groundwater was monitored weekly for one month during May. No groundwater was detected during this time. Additional test holes were completed in the area and are consistent with those encountered at the proposed lot, indicating that the soils should not differ significantly throughout other areas of the lot. A falling head percolation test was performed in compliance with Municipality of Anchorage standards on May 26`h, 2006. Field results and calculations are attached. A percolation rate of 2.78 minutes per inch was measured at the test hole location. The lot size and layout appears to provide sufficient area for an onsite water and wastewater system with required setbacks and separation distances. we look forward to your response and/or approval on this matter. Please call me at (907) 694- 2332 if you have any questions or need additional information. Very Truly Yours, RODNEY P. KINNEY ASSOCIATES, INC. Rodncy . Kinney, Jr. '.E. Principal Attachments RJR:djm DESIGNATED ALTERNATIVE REPLACEMENT REPLACEMENT DISPOSAL SITE 1 DISPOSAL SITE DISPOSAL SITE S , J YNN M _ O 5' MIN p �. T �1 p�� o o 'pp�s \ I,/ � �\ i > III�� // �\\\Eor�- � 14 _ � I ��-1111 I'llll� III I I I��III IIII IIII III r � I�IIIiiIIIIIII hIIIIII� / \ \ IIIIIIII 11111111111113 � /�� . .,.12�,I SITE PLAN SCALE: 1'-50' FIGURE 1 Municipality of Anchorage P.O. Box 196650 *Anchorage, Alaska 99519.6650 *Telephone: (907) 343-7900 Physical Address: 4700 Bragaw Street* Anchorage, Alaska 99507 * www.muni.orglplanning Mayor Mark Begich April 13, 2006 Horseshoe Properties LLC Attn: Bill Kramer PO Box 521783 Big Lake, AK 99652 p).ianing nepar=cnt -Orj Dear Applicant: On Wednesday, April 05, 2006, the Platting Authority acted on your petition S11463-1, The Hidden Hills Subdivision. The petitition was APPROVED. Special Conditions, in addition to those of Tltie 21, attached by the Platting Authority are on the enclosed Summary of action. If you have any questions on these conditions or changes, please call our office at 343-7942. PRELIMINARY APPROVAL IS VALID ONLY FOR 18 MONTHS or as otherwise stated In the Summary of Action. Within that time, you must accomplish the following to finalize your request 1. Negotiate a subdivision agreement with the Department of Public Works, If required. conditions2. Meet the addition t those of Title 21 of the AMC ch are Included in the attached Summary of Actionin add 3. Comply with all applicable provisions of the Municipal Land Subdivision Regulations. 4. In the case of subdivision, submit to the Department of Planning a properly executed final plat ready for filing. If you wish to appeal this decision or any of the condtions, we will furnish copies of our appeal procedures. Please note that all appeals must be made within fifteen (15) days of the Platting Board's action. Sincerely, DEPARTMENT OF PLANNING Zoning and Platting Section cc: Rodney P. Kinney Associates Inc. R.P. Kinney Assoc, Inc. 16515 Centerfieid Drive #101 Eagle River, AK 99577 Platting Board Summary of Action April 5, 2006 Page 11 P-1 5-11457-1 Collegegate Subdivision Postponed to the May 3, 2006. Platting Board meeting at the request of the petitioner. S-11463-1 The Hidden Hills Subdivision Approval of the plat for 18 months subject to: 1. Resolving utility easements. 2 providing existing conditions and proposed finish road grade to PM&E for all proposed roads prior to final plat approval. 3. Providing soil tests and groundwater hydrology analysis to determine the need for footing drain stub -outs prior to final plat approval. 4. Providing a site grading plan and drainage calculations to PM&E to resolve the need for drainage easements and drainage improvements and to demonstrate that all post development drainage patterns will not adversely impact adjacent properties or rights-of-way prior to final plat approval. 5. Resolving with PM&E and Traffic the need to improve Kantishna Drive to peripheral standards with pedestrian facilities along the adjacent kantishna right-of-way from the eastern property line of the subdivision to the ,western boundary of Lot 23, Block 2. 6. Resolving the need with Traffic and PM&E for pedestrian improvements for Kantishna Drive from the western boundary of Lot 23 to Lynne Drive to the west. 7. Entering into a subdivision agreement with Private Development for all required road improvements and for the installation of sidewalks, walkways, trails, street lighting, platting Board Summary of Action April 5, 2006 Page 12 drainage facilities and utilities in accordance with Title 21. 8. Obtaining an ADOT permit for the intersection of Ludlow Circle and Old Eagle River Road. 9. Resolving permanent storm water treatment with WMS prior to recording the final plat, any land clearing, grading or construction activity. 10. Obtaining approval from WMS for an erosion and sediment control plan and storm water pollution prevention plan prior to recording the final plat, any land clearing, grading or construction activity. 11. Resolving with AWWU, the need to identify on the plat all lots that will require on-site lift stations in order to connect to the proposed sanitary sewer mains (i.e. Bluff Loop Circle). 12. Dedicating an additional two (2) feet for Old Eagle River Road in accordance with the requirements of AMC 21.45.140. 13. Redesigning the plat to provide the 70 -foot lot width for Lot 12, Block 2 as required by AMC 21.40.030.F.1 (Minimum lot requirements) or obtaining a variance from the Zoning Board of Examiners and Appeals. 14. Submitting an as built survey to Land Use Enforcement showing the existing single-family dwelling and detached garage on Lot 28A verifying compliance with yard setbacks with respect to proposed lot lines, or remove both structures from the property. 15. Placing the following note on the plat: a. "There shall be no direct vehicle access from any lot in this subdivision to Old Eagle River Road." Platting Board Summary of Action April 5.2006 Page 13 16. Making the following drafting corrections: a. Street Names: Bluff Loop is a duplicate of a "Bluff' in NW 1130 and NW 1131 and therefore is not acceptable; Ashley Park Lane is missing its street type; and Teklanika drive is missing its street type. b. Title Block Information: Legal description, Dale Briggs Blk 1, Lot 28 is missing the block number. C. Resolving the need with Municipal Addressing to change the label for Lynne Drive to the northwest of the petition site to Kantishna Drive. 17. Submitting information to On -Site Water and Wastewater to satisfy the requirements specif by AMC 21.15, AMC 15.55 and AMC 15.65 for Lot .15, Block 1 which includes, but may not necessarily be limited to: a. Topographical information. b. Documentation for Water availability to serve water wells. C. Documentation identifying areas designated for the original and replacement wastewater disposal system sites which meet all the criteria specified in AMC 15.64 including slope and slope setback requirements. d. Soil testing, percolation testing, ground water monitoring to be conducted during high ground water season in either the fall (October) or spring (May). 1 t:. t li ii) F' i `• s f� 0 12 1 �S�v � ! y�`i•1! ��iX";Fi3Rv G1 SS G!3 0 ; ,. L'yRr I Y,Gf r�r L S•I%! R S y . ♦ 9y 0 'iT si t li ii) F' i `• s f� 0 12 x"111 - � ! y�`i•1! ��iX";Fi3Rv G1 SS G!3 0 ; ,. I Y,Gf 13 ��: 1 Y: � � i ' S y . ♦ 9y 0 t li ii) F' i `• s f� 0 12 x"111 - t li ii) F' i `• s f� 0 12