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Application Materials PUBLIC HEARING TRANSMITTAL TO AGENCIES FOR COMMENTS ON DEVELOPMENT PROJECTS WITH THE CITY OF MERIDIAN To ensure that your comments and recommendations will be considered by the Meridian Planning and Zoning Commission please submit your comments and recommendations to Meridian City Hall To: Attention C.Jay Coles, City Clerk By: May 11, 2018 Cit y Clerk ’s Office 33 E. Broadwa y Avenue, Meridian, ID 83642 Phone 208-888-4433 Fax 208-888-4218  cityclerk@meridiancity.org www.m eridiancity.org Transmittal Date: 4-11-2018 File No: H-2018-0040 FP Hearing Date: May 15, 2018 REQUEST: A Final Plat Consisting of 16 Multi-Family Building Lots, 2 Common Lots and 3 Storage Building Lots on 10.68 Acres in an Existing C-G Zoning District for Harper Ridge Subdivision. By: Schultz Development Location of Property or Project: 3885 E Copper Point Drive Planning and Zoning Commission Meridian School District Tammy de Weerd, Mayor Meridian Post Office City Council Ada County Highway District Sanitary Services Ada County Development Services Building Department Central District Health Fire Department COMPASS Police Department Nampa Meridian Irrigation District City Attorney Settlers Irrigation District City Public Works Idaho Power Company City Planner Century Link Parks Department Intermountain Gas Co. Economic Development Idaho Transportation Department New York Irrigation District Ada County Associate Land Records Boise Project Board of Cont rol – Tim Paige Downtown Projects Community Development Meridian Development Corporation Historical Preservation Commission South of RR/SW Meridian NW Pipeline Boise-Kuna Irrigation District Hearing Date: May 15, 2018 File No.: H-2018-0040 Project Name: Harper Ridge Subdivision Request: (FP) Request for Final Plat consisting of 16 multi -family building lots 2 common lots and 3 storage building lots on 10.68 acres in an existing C -G zoning district. Location: The site is located at 3885 E. Copper Point Drive in the north 1/2 of the south west 1/4 of Section 21, Township T.3N., Range IE. E IDIAN ��_ EtY: Planning Division DEVELOPMENT REVIEW APPLICATION STAFF USE ONLY: Project name: File number(s): — ZO I S -- (1 0 C Assigned Planner: Related files: Type of Review Requested (check all that apply) ❑ Accessory Use (check only 1) ❑ Final Plat Modification ❑ Daycare ❑ Landscape Plan Modification ❑ Home Occupation ❑ Preliminary Plat ❑ Home Occupation/Instruction for 7 or more ❑ Private Street ❑ Administrative Design Review ❑ Property Boundary Adjustment ❑ Alternative Compliance ❑ Rezone ❑ Annexation and Zoning ❑ Short Plat ❑ Certificate of Zoning Compliance ❑ Time Extension (check only 1) ❑ City Council Review ❑ Director ❑ Comprehensive Plan Map Amendment ❑ Commission ❑ Comprehensive Plan Text Amendment ❑ UDC Text Amendment ❑ Conditional Use Permit ❑ Vacation (check only 1) ❑ Conditional Use Modification (check only 1) ❑ Director ❑ Director ❑ Commission ❑ Commission ❑ Variance ❑ Development Agreement Modification ❑ Other �inalPlat Applicant Information Applicant name: Phone: C I CK I- S 7 0q Applicant address: �Z��C�' Email: av�1 City: C �i�-e Stater Zip: Applicant's interest in property: gown ❑ Rent ❑ Optioned ❑ Other Owner name: Owner address: Email: Phone: City: State: Zip: Agent/Contact name (e.g., architect, en ineer, developer, representative): Firm name: -1��—�-1 Phone: Z�� (���,,� S Agent address: d P--&4— 11 Email: r 1 C-� City: 1`" \ :2-6 GilState: It Zip: D Primary contact is: ❑ Applicant ❑ Owner `1 gent/Contact Information Location/street address: c�� E �' ` d1nATownship, range, section: J�713 t ��� Assessor's parcel number(s): "21 Z�j �i`�C� Total acreage: D, Zoning district: C ' G1 \ 2 5 1 fTU CL c Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 www.meridiancity.org(planning -1 Rev: (2/2/2 0 1 8 2/7/2 0 1 8) � 21 Project/subdivision name: General description of proposed roject/request: �1t1 G�� �`�1.T Y� Vzc k a� ►V-� G�'S �' C �,`«� I � "J_ `z Cb+�.,..r•,...ti leis- bu- (_6 ,7 c�rQS t .. Proposed zoning district(s): c Acres of each zone proposed: Type of use proposed (check all that apply): ,Residential ❑ Office ❑ Commercial ❑ Employment ❑ Industrial ❑ Other r ` Who will own & maintain the pressurized irrigation system in this development? Which irrigation district does this property lie within? µ- 1, '16 Primary irrigation source: Secondary: Square footage of landscaped areas to be irrigated (if primary or secondary point of connection is City water): z 5F W Residential Project Summary (if applicable) Number of residential units: i 2� L''`r AC-; Number of building lots:(( iis� LkNumber of common lots: Z- Number of other lots: S ok b Proposed number of dwelling units (for multi -family developme is only): 1 bedroom: 'Zt!, 2-3 bedrooms: 0 Minimum square footage of structure (excl. garage): E550 SF 4 or more bedrooms: Maximum building height: ^Z5 Minimum property size (s.f): 1 � , s '5'F Cc -f C-",bZ`. g property ( ): Avera esize s.f. Gross density (Per UDC 11-1A-1): (,-- � V`'i f"Ic-_ Net density (Per UDC I 1-1A-1): N P`� Acreage of qualified open space: a--(- Percentage of qualified open space: 1 1 ' f 1'f d M d' P UDC 11 3G 3B)• Type and ca cu at o qua i ie open space prove e m acres ( ei - - — C'C'e— �� usI Tse - kp� - _ - 0,C Amenities provided with this development (if applicable) Type of dwelling(s) proposed: ❑ Duplex YMulti-family i oc' t F ❑ Single-family Detached ❑ Single-family Attached ❑ Townhouse ❑ Vertically Integrated ❑ Other Non-residential Project Summary (if applicable) V3 1 Number of building lots: Gross floor area proposed: Hours of operation (days and hours): Total number of parking spaces provided: Authorization Print applicant name: Common lots: Other lots: Existing (if applicable): Building height: Number of compact spaces provided: Applicant signature:Date:IV 8 Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 www.meridiancityorg/planning -2- Rev. -(21712018) Apri19, 2018 City of Meridian Honorable Mayor and City Council c/o City of Meridian Planning Department 33 E. Broadway Avenue Meridian, ID 83642 RE: Harper Ridge Subdivision Final Plat Application Dear Mayor and City Council Members: On behalf of McMaster Limited Partnership, please accept this application for a final plat for the Harper Ridge Subdivision located at 3885 E. Copper Point Drive on the southwest corner of Copper Point Drive and Knapp Avenue. We are requesting a final plat for 16 multi -family building lots with 124 apartment units, 4 storage building lots, and 2 common lots on 10.68 acres in an existing C -G zone. The preliminary plat and conditional use permit applications for this site were approved by City Council on March 20, 2018. (H-2017-0151). The final plat conforms to all of the requirements and conditions of the approved Preliminary Plat and Conditional Use Permit. The overall number of parking stalls is 263 where 243 are required by City Code. The submitted final plat, development plans, and landscape plans conform to the UDC and all applicable engineering, architectural, and surveying practices and local standards. Sincerely, Matt Schultz Schultz Development LLC attachments DESCRIPTION FOR HARPER RIDGE SUBDIVISION A parcel of land located in the W1/2 of Section 21, T.3N., RAE., B.M., Meridian, Ada County, Idaho more particularly described as follows: Commencing at the C1/4 corner of said Section 21 from which the W1/4 corner of said Section 21 bears North 89°07'51" West, 2667.58 feet; thence along the East-West centerline of said Section 21 North 89°07'51" West, 66.17 feet; thence leaving said East-West centerline South 00052'09" West, 7.00 feet to an angle point in the exterior boundary line of Sutherland Farm Subdivision No. 5 as filed in Book 94 of Plats at Pagesl1,433-11,445, records of Ada County, Idaho, said point also being the REAL POINT OF BEGINNING; thence along the exterior boundary line of said Sutherland Farm Subdivision No. 5 the following 8 courses and distances: thence South 37032'49" East, 26.55 feet; thence South 00°1116" West, 117.48 feet; thence North 87043'08" West, 81.45 feet; thence 192.67 feet along the arc of a curve to the left, said curve having a radius of 350.00 feet, a central angle of 31'32'28" and a long chord of 190.25 feet which bears South 76°30'38" West; thence South 60044'10" West, 17.46 feet; thence 195.28 feet along the arc of a non -tangent curve to the left, said curve having a radius of 250.00 feet, a central angle of 44°45'15" and a long chord of 190.35 feet which bears South 38°21'47" West; thence South 15059'12" West, 112.50 feet; thence 195.09 feet along the arc of a non -tangent curve to the right, said curve having a radius of 100.00 feet, a central angle of 11104639" and a long chord of 165.59 feet which bears South 71052'32" West; thence continuing along the exterior boundary line of said Sutherland Farm Subdivision No. 5 and along the exterior boundary line of Sutherland Farm Subdivision No. 3 as filed in Book 91 of Plats at Pages 10,859-10,861, records of Ada County, Idaho North 52014'02" West, 127.00 feet to an angle point in the exterior boundary line of Sutherland Farm Subdivision No. 3; thence continuing along the exterior boundary line of said Sutherland Farm Subdivision No. 3 the following 2 courses and distances: Page I of 2 thence 111.22 feet along the are of a curve to the left, said curve having a radius of 220.00 feet, a central angle of 28057'57" and a long chord of 110.04 feet which bears North 66043'00" West; thence North 81012'02" West, 256.90 feet; thence continuing along the exterior boundary line of said Sutherland Farm Subdivision No. 3 and along the exterior boundary line of Sutherland Farm Subdivision No. 4 as filed in Book 92 of Plats at Pages 10,988-10,990, records of Ada County, Idaho North 88030'26" West, 230.10 feet; thence continuing along the exterior boundary line of said Sutherland Farm Subdivision No. 4 North 68002'56" West, 75.09 feet to the SE corner of Silverstone Subdivision -Phase 2 as filed in Book 85 of Plats at Pages 9,441 and 9,442, records of Ada County, Idaho; thence along the easterly boundary line of said Silverstone Subdivision -Phase 2 the following 5 courses and distances: thence North 21 °57'04" East, 60.04 feet; thence North 23001'29" West, 91.35 feet; thence North 00°00'04" West, 190.06 feet to a point on the East-West centerline of said Section 21; thence along said East-West centerline South 89°07'51" East, 3.31 feet; thence leaving said East-West centerline North 00°13'03" East, 164.50 feet to a point on the southerly right-of-way line of E. Copper Point Drive; thence along said southerly right-of-way line the following 2 courses and distances: thence 59.85 feet along the arc of a non -tangent curve to the left, said curve having a radius of 327.00 feet, a central angle of 10029'11" and a long chord of 59.76 feet which bears South 84033'10" East; thence South 89°47'40" East, 10.38 feet to a point on the West boundary line of Silverstone Campus Subdivision as filed in Book 89 of Plats at Pages 10,295-10,299, records of Ada County, Idaho; thence along said West boundary line South 00°1536" West, 159.85 feet to the SW corner of said Silverstone Campus Subdivision; thence along the South boundary line of said Silverstone Campus Subdivision South 89°07'51" East, 375.99 feet; thence leaving said South boundary line South 00°11'16" West, 7.00 feet to a point on the South right-of-way line of W. Copper Point Drive; thence along said South right-of-way line South 89°07'51" East, 891.73 feet to the REAL POINT OF BEGINNING. Containing 10.68 acres, more or less. S o G�� 7729 Page 2 of 2 ATF OF ��dRv r,_ Gp� RECORDING REQUESTED BY AND WHEN RECORDED MAIL TO THORNTON BYRON L.L.P. 3101 W. MAIN STREET, SurrE 200 P.O. Box 7156 BOISE, ID 83707-1156 208/344-8600 ADA COUNTY RECORDER Christopher D. Rich 2017-109243 BOISE IDAHO Pgs=6 VICTORIA BAILEY 11115/201711:42 AM THORNTON BYRON LLP $15.00 ADA COUNTY RECORDER Christopher D. Rich 2015-009789 BOISE IDAHO Pgs=4 CHE FOWLER 02/06/2015 03:28 PM THORNTON BYRON AMOUNT:$19.00 00063968201500097890040041 (SPACE ABOVE LINE FOR RECORDER'S USE) Corrected QUITCLAIM DEED Re -Recorded to Correct Legal Description 'I Copper Point Partners LLC, an Idaho limited liability company, Grantor, does hereby convey, release, remise and forever quitclaim unto McMaster Limited Partnership, an Idaho limited partnership, Grantee, whose current address is 16166 N. 20`' Street, Nampa, Idaho 83687, all of the right, title and interest in and to that certain real property located in Ada County, Idaho, more particularly described on Exhibit A, attached hereto and made a part hereof by this reference. Together with all improvements, easements, hereditaments and appurtenances thereto, and subject to such rights, easements, covenants, restrictions and zoning regulations as appear of record or based upon the premises. In witness whereof, Grantors have hereunto subscribed their name to this instrument effective the 31" day of December, 2014. Grantor: Copper Poini Parmers LLC By: - L Dou as R. cMaster, Manager QUITCLAIM DEED - P. 1 STATE OF IDAHO ) SS. COUNTY OF ) On this adkday of , 2015, before me, the undersigned Notary Public in and for said State, personally a peared uglas R. McMaster, known or identified to me to be the Manager of Copper Point Par ners LL , the Idaho limited liability company that executed the foregoing instrument and the person whose name is subscribed to the within instrument, and acknowledged to me that said limited liability company executed the same. IN WITNESS WHEREOF, I have hereunto set my hand and affixed my official seal the day and year first above written. NOTARY PUBStat f o •••••ueeue jej� , Residing at •.•• iEFFp'00ti � My commission expires: ^� ` a - a d) S 4� NRY 4P .",. X rE .0V QurrcLAIM DEED - P. 2 ..... .... ......... EXHIBIT A LEGAL DESCRIPTION: A PARCEL OF LAND SITUATED IN A PORTION OF THE SOUTHWEST QUARTER OF THE NORTHWEST QUARTER & THE NORTH HALF OF THE SOUTHWEST 1/4 OF SECTION 21, TOWNSHIP 3 NORTH, RANGE 1 .EAST, BOISE MERIDIAN, MERIDIAN, ADA COUNTY, IDAHO, AND MORE PARTICULARLY DESCRIBED AS FOLLOWS: COMMENCING AT THE CENTER 1/4 MARKING THE NORTHEAST CORNER OF THE SOUTHWEST 1/4 OF SECTION 21; THENCE ALONG THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SAID SECTION, NORTH 89007'46" WEST, 66.17 FEET; THENCE SOUTH -00°52'14" WEST, ?'.00 FEET TO THE POINT OF BEGINNING; THENCE ALONG THE NORTHWESTERLY BOUNDARY OF SUTHERLAND FARM SUBDMSION #5 THE FOLLOWING TWO COURSES AND:DISTANCES: 1) SOUTH 37°32'49" EAST, 26.55 FEET, 2) SOUTH 00°11'16" WEST, 117.48 FEET TO THE CENTER LINE OF THE RIDENBAUGH CANAL; THENCE ALONG SAID CENTER LINE AND SAID NORTHWESTERLY BOUNDARY THE FOLLOWING SEVEN COURSES AND DISTANCES: 1) NORTH 87043'08" WEST, 81.45 FEET; 2) ALONG A CURVE TO THE LEFT 192.67 FEET, HAVING A RADIUS OF 350.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 76030'38" WEST, 190.25 FEET; 3) SOUTH 60944'10" WEST, 17.46- FEET; 4) ALONG A NON TANGENT CURVE TO THE LEFT 195.28 FEET, HAVING A RADIUS OF 250.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 38°21'47" WEST, 190.35 FEET; 5) SOUTH 15°59'12" WEST, 112.50 FEET; 6) ALONG A CURVE TO THE RIGHT 195.09 FEET, HAVING A RADIUS OF 100.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 71°5232" WEST, 165.59 FEET; 7) NORTH 52014'02" WEST, 127.00 FEET; THENCE ALONG SAID CENTER LINE AND THE NORTHERLY BOUNDARY OF SUTHERLAND FARM SUBDIVISION #3 THE FOLLOWING COURSES AND DISTANCES: 1) ALONG A NON TANGENT CURVE TO THE LEFT 111.22 FEET, HAVING A RADIUS OF 220.00 FEET, AND A LONG CHORD WHICH BEARS NORTH 66043'00" WEST, 110.04 FEET; 2) NORTH 81012'02" WEST, 256.90 FEET, 3) NORTH 88030`26" WEST, 230.10 FEET; 4) NORTH 68002'56" WEST, 75.09 FEET; THENCE ALONG THE SOUTHEASTERLY BOUNDARY OF SILVERSTONE SUBDIVISION PHASE #2 THE FOLLOWING FIVE COURSES AND DISTANCES: 1) NORTH 21057'04" EAST, 60.06 FEET; 2) NORTH 23001'29" WEST, 91.35 FEET; 3) NORTH 00000'04" WEST, 190.06 FEET TO THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SECTION 21; 4) ALONG SAID BOUNDARY, SOUTH 89007'46" EAST, 3.31 FEET; 5) NORTH 00013'03" EAST, 183.13 FEET; THENCE _ THENCE ALONG THE SOUTHWESTERLY BOUNDARY OF SILVERSTONE CAMPUS THE FOLLOWING COURSES AND DISTANCES: 1) SOUTH 00°13'03" WEST, 186.86 FEEL' TO THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SECTION 21; 2) ALONG SAID BOUNDARY, SOUTH 89007'46" EAST, 375.76 FEET; 3) SOUTH 00011'16" WEST, 7.00 FEET; 4) PARALLEL.WITH AND 7.00 FEET SOUTHERLY OF THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1%a OF SECTION 21, SOUTH 89007'46" EAST; 891.71 FEET TO THE POINT OF BEGINNING. :LESS AND EXCEPTING THEREFROM THAT PROPERTY DEEDED TO ACRD BY WARRANTY DEED RECORDED AS INSTRUMENT NO. 102042502, RECORDS OF ADA COUNTY, IDAHO. CORRECTED LEGAL DESCRIPTION LEGAL DESCRIPTION: Real property in the County of Ada, State of Idaho, described as follows: A PARCEL OF LAND SITUATED IN A PORTION OF THE SOUTHWEST QUARTER OF THE NORTHWEST QUARTER & THE NORTH HALF OF THE SOUTHWEST 1/4 OF SECTION 21, TOWNSHIP 3 NORTH, RANGE i EAST, BOISE MERIDIAN, MERIDIAN, ADA COUNTY, IDAHO, AND MORE PARTICULARLY DESCRIBED AS FOLLOWS: COMMENCING AT THE CENTER 1/4 MARKING THE NORTHEAST CORNER OF THE SOUTHWEST 1/4 OF SECTION 21; THENCE ALONG THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SAID SECTION, NORTH 89007'46" WEST, 66.17 FEET; THENCE SOUTH 00052'14" WEST, 7.00 FEET TO THE POINT OF BEGINNING; THENCE ALONG THE NORTHWESTERLY BOUNDARY OF SUTHERLAND FARM SUBDIVISION #5 THE FOLLOWING TWO COURSES AND DISTANCES: 1) SOUTH 37032`49" EAST, 26.55 FEET, 2) SOUTH 00°11'16" WEST, 117.48 FEET TO THE CENTER LINE OF THE RIDENBAUGH CANAL; THENCE ALONG SAID CENTER LINE AND SAID NORTHWESTERLY BOUNDARY THE FOLLOWING SEVEN COURSES AND DISTANCES: 1) NORTH 87°43'08" WEST, 81.45 FEET, 2) ALONG A CURVE TO THE LEFT 192.67 FEET, HAVING A RADIUS OF 350.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 76030'38" WEST, 190.25 FEET; 3) SOUTH 60°44'10" WEST, 17.46 FEET; 4) ALONG A NON -TANGENT CURVE TO THE LEFT 195.28 FEET, HAVING A RADIUS OF 250.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 38021'47" WEST, 190.35 FEET; 5) SOUTH 15059'12" WEST, 112.50 FEET; 6) ALONG A CURVE TO THE RIGHT 195.09 FEET, HAVING A RADIUS OF 100.00 FEET, AND A LONG CHORD WHICH BEARS SOUTH 71052'32" WEST, 165.59 FEET; 7) NORTH 52°14'02" WEST, 127.00 FEET, THENCE ALONG SAID CENTER LINE AND THE NORTHERLY BOUNDARY OF SUTHERLAND FARM SUBDIVISION #3 THE FOLLOWING COURSES AND DISTANCES: 1) ALONG A NON -TANGENT CURVE TO THE LEFT 111.22 FEET, HAVING A RADIUS OF 220.00 FEET, AND A LONG CHORD WHICH BEARS NORTH 66043'00" WEST, 110.04 FEET; 2) NORTH 81°12'02" WEST, 256.90 FEET; 3) NORTH 88°30'26" WEST, 230.10 FEET; 4) NORTH 68°02'56" WEST, 75.09 FEET; THENCE ALONG THE SOUTHEASTERLY BOUNDARY OF SILVERSTONE SUBDIVISION PHASE #2 THE FOLLOWING FIVE COURSES AND DISTANCES: 1) NORTH 21°57'04" EAST, 60.06 FEET; 2) NORTH 23001'29" WEST, 91.35 FEET; 3) NORTH 00000'04" WEST, 190.06 FEET TO THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SECTION 21; 4) ALONG SAID BOUNDARY, SOUTH 89°07'46" EAST, 3.31 FEET; �5 L�Ov 5) NORTH 00°13'03" EAST,183.13 FEET; THENCE NORTH 87049'16" EAST, 70.06 FEET;--� tM tis THENCE ALONG THE SOUTHWESTERLY BOUNDARY OF SILVERSTONE CAMPUS THE FOLLOWING COURSES AND DISTANCES: 1) SOUTH 00013'03" WEST, 186.86 FEET TO THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SECTION 21; 2) ALONG SAID BOUNDARY, SOUTH 89°07'46" EAST, 375.76 FEET; 3) SOUTH 00°11'16" WEST, 7.00 FEET; 4) PARALLEL WITH AND 7.00 FEET SOUTHERLY OF THE NORTHERLY BOUNDARY OF THE SOUTHWEST 1/4 OF SECTION 21, SOUTH 89°07'46" EAST, 891.71 FEET TO THE POINT OF BEGINNING. LESS AND EXCEPTING THEREFROM THAT PROPERTY DEEDED TO ACHD BY WARRANTY DEED RECORDED AS INSTRUMENT NO. 102042502, RECORDS OF ADA COUNTY, IDAHO. OHVOI ',dNnm VOV 'NVIO1d3Vf1 LU ''W'O ` 3 t 21 "W'l '[Z N01133S iVld J,2JVNIWIl3Nd 1V1d MVNIWI13dd 390Ia 83ddVH 9NIi133N1'JN3 k� SIR � t �a" I� I 3�ag s ; r z m R Iii 1 l i.;�&?fl�i8��1 MCI. �� \ " ? `r� w ti � x h 11118Of T` W R a 01. I Ix ,;11 n Will �W !H a s s man meur eaNc rer s 4 a � z zjr pg mom alb k til I Rb I F 1 mao f iii'- f � gnu POP 'f;. S0.FFAS10tE S00001SON Tri / C1N PfIhSE - 2 / / � S EAdE P0. I NOWbS'W 2700.15' C� ENGINEERING P.C-1f6. . Civil Engineering * Project Management DATE: April 9, 2018 TO: City of Meridian 33 E. Broadway Ave Meridian, ID 83642 RE: Harper Ridge Subdivision Seasonal High Groundwater To whom it may concern: Based on a geotechnical report prepared by Site Consulting Inc, groundwater is at least 12 feet below existing ground elevation. All streets have been designed so that the centerline of the street is at least 3 feet above seasonal groundwater. Respectfully submitted, Chad S. Kinkela, P.E. CK Engineering, P.C. CK Engineering 13oo E. State St Suite 102 Eagle, ID 83616 208.869.o590 mobile chad@ek-engineers.com AFFIDAVIT OF LEGAL INTEREST STATIC OF IDAHO ) Q cD COUNTY OF ADA) l�� "'Doto / `c p s VC-) (name) (address) E �e ft �`' C, C Cn (city) (state) being fust duly sworn upon, oath, depose and say: 1. That I am the record owner of the property described on the attached, and I grant my (name) (address) E`53 to submit the accompanying application(s) pertaining to that property. 2. I agree to indemnify, defend and hold the City of Meridian and its employees harmless from any claim or liability resulting from any dispute as to the statements contained herein or as to the ownership of the property which is the subject of the application. I hereby grant permission to City of Meridian staff to enter the subject property for the purpose of site inspections re Dated this l 7 day SUBSCRIBED AND SWORN to before me the day and year first above written. fri/11N1wLl f WOLF('Notary Public for Idaho) NOTARY PUBLIC Residing at: gaulle STAT E OF IDAHO My Commission Expires: 33 E Broadway Suite 210 • Meridian, ldalio 83642 Phone: (208) 884-5533 • Facsimile: (208) 888-6678 • Website: www.meridiancity.org 0 ro a� . cc L CLLm E IDIANO-- IDAH Community Development Department Parcel Verification Date:4/5/18 Meridian City Hall, Suite 102 33 E. Broadway Avenue Meridian, Idaho 83642 208.887.2211 The parcel information below has been researched and verified as correct by the City of Meridian Community Development Department. 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Fm"''0ay�o� - TL n o.cP g'"Wy�.a 52. .o d F_h1Dm ny -'m iq- }O o �O °loivaa-!Do _ n ��om" O ¢ gO m O mm= g3o�m n a�"n°=Na m m m o a �o5io �n u p o c n o w av SnS=g^d c ° N � °odnmoon 0 3 H p ° o 00 o » 3 '�g;H gyp'° � 5 a zd b PROFF a9 m cs N p 9� ryo �5 mR bo�3�a o H m a 2 m v < o a o c 05. x° and F a � m ?m y»o 3a ano _.ma -o To =oEf �m C od m p m Q c m e 0-, c o u T Cnm nc fav a U9 p o H 10 'm a m m �� » CD O X = o 3N� C �-< oar. r sl "oma a C7 x ? H ..A-o gomm zo 0 A o0 N N 1 ENGINEERING PECE C -Vfi Eng neering * Proj ee t Dana gei e 'c Harper Ridge subdivision Drainage calculations March o5, 20x8 Prepared for: McMaster Construction and Development Inc. Doug McMaster 16166 N. 20th St Nampa, ID 83687 208-461-1234 Prepared by: CICEngineering, P.C. Chad KinkeIa, P.E. 1300 E. State Street, Suite 102 Eagle, ID 83616 208-869-o5go CK Engineering 1300 E. State St Suite 102 Eagle, ID 83616 208.869.o590 mobile ehad@ek-engineers.com ADHD Calculation Sheet for Finding Peak Discharge/Volume - Rational Method NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. Calculate post-Davelopment Flows (for pre -development flows, increase number of storage facilities to create new t_ ab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED 41 PRIVATE SYSTEM 2 Is area drainage basin map provided? YES (map must be included with stormwater coiculations) 3 Enter Design Storm (100•Year or 25 -Year With 100 -Year Flood Route) 100 4 Enter number of storage facilities (25 max) 5 Area of Drainage Subbasin (SF or Acres) SF Acres 6 Determine the Weighted Runoff Coefficient (C) C=((C1xA1)+(C2xA2)+(CnxAn))/A Weighted Avg Click to show More Subbasins 0 Subbasin User Calculate [f67 n.— Subbasin Subbasin Subbasin 9 Calculate the Post -Development peak discharge (QPeak) Q-1 Subbasin Subbasin Subbasin Subbasin 1 Subbasin 2 3 4 5 Subbasin 6 7 8 9 10 7,428 350 it' 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) 090 cis 0.10-0.25 playgrounds 0.10-0.35 ;Za:boad `ixd aces 0.17 Unin•.pro•:o ar_as 0.10-0.30 350 •� ,n .. i:Ft 210 Coact rte 095 6,14 0.95 goals 0.95 Fields Sandyoll $odTppe Store .. 5 C D 0.95 0.04 0.07 0.11 9+15 ':etage 2-6'- Stade >6Fe 0.09 0.12 0.15 0.20 7 Calculate Overland Flow Time of Concentration in Minutes (Tc) or use default 10 min User Calculate [f67 n.— 8 Determine the average rainfall intensity (i) from IDF Curve teased on i 2.58 in/hr 9 Calculate the Post -Development peak discharge (QPeak) Q-1 0,42 cis 10 Calculate total runoffvol (V) (for sizing primary storage) V 560 it$ V = Ci (Tc=60)Ax3600 0.35 - 0 50 Muiti.i=&; 11 Calculate Vrr (for sizing WQfacilities) Re4ident131 frurall 015 • a.40 Enter Percentile Storm I (80th percentile =0.34 in) 95th 0.60 in Enter Runoff Reduction Vol (95th Percentile=0.60-in xArea) V., 350 it' 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) 090 cis 0.10-0.25 playgrounds 0.10-0.35 ;Za:boad `ixd aces 0.20.0+0 Unin•.pro•:o ar_as 0.10-0.30 350 •� ,n .. i:Ft 210 Coact rte 095 6,14 055 P.\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CAICS\HARPER RIDGE S81(DA 01) 2-7-18.xism Version 8,2, October 2015 With New IDF Curves Estimated Runoff Coefficients for Vatious Surfaces Type of Surface Runoff Coefficients `C" 9usmess Dp::ntot•:n areas 0.70-095 Utban nefebbod'ood area: 0.50-070 Res�aenttal Sirgle`faeity 0.35 - 0 50 Muiti.i=&; 060-075 Re4ident131 frurall 015 • a.40 %�PartMdrt d:•: ell:ng areas 070 tedustnal and cow -e-31 _IgM 3r Gas o s o areas 090 pvks, cerretepe 0.10-0.25 playgrounds 0.10-0.35 ;Za:boad `ixd aces 0.20.0+0 Unin•.pro•:o ar_as 0.10-0.30 Strdet� A:pha;t 095 Coact rte 095 6rla 055 goals 0.95 Fields Sandyoll $odTppe Store .. 5 C D •%13: 0.04 0.07 0.11 9+15 ':etage 2-6'- Stade >6Fe 0.09 0.12 0.15 0.20 0.13 0.13 0.23 0.25. -'dapted,,am ASCE 3/5/2018,11:00 AM ACHD Calculation Sheet for Sand/Grease Traps NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. A xStes`for Sand`Gi aS4 r 7 eIQGi GalGnlat+0r, a a; User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #1 PRIVATE SYSTEM Lnter number or Reference for Throat widths (inch) P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAI NAG E CALCS\HARPER RIDGE SB 1(DA 91) 2-7-18.xism3/5/2018, 11:00 AM Version 8.2, October 2015 With New IDF Curves ADS Boise Lar -ken WQU, Vault BMP 16 1000 G 48.0 50.5 n/a 1500 G 60.0 61.5 n/a WQU1000 n/a n/a 60 WQU1500 n/a n/a 60 P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAI NAG E CALCS\HARPER RIDGE SB 1(DA 91) 2-7-18.xism3/5/2018, 11:00 AM Version 8.2, October 2015 With New IDF Curves ACHD Calculation Sheet for Sizing Seepage Bed With Optional Chambers NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. Note this spreadsheet pulls information from the "Peak Q,V" tab 01 r � 'Ste , 41 See a etl' ` '` "z > Sg x Calculate Post -Development Flows (for pre -development flows, increase number of storage facilities to create new tab) User input in yellow cells. I Project Name HARPER RIDGE SEEPAGE BED #1 PRIVATE SYSTEM z. Inter numuer or seepage tseas tzs ma; 3 Design Storm 4 Weighted Runoff Coefficient C 5 Area A (Acres) 6 Approved discharge rate (if applicable) 7 Design Vol W/15% Sediment 8 Set Total Design Width of All Drain Rock 1 100 0.95 Linkto: IQw 0.17 acres QX TR55 0.00 cfs V 644 ft3 W 10.0 ft 9 Set Total Design Depth of All Drain Rock D Rock Only, Do Not include Filter Sand Depth or Cover 10 Void Ratio of Drain Rock 0.4 for 1.5"-2" drain rock and 3/4" Chips 11 Design Infiltration Rate (8 in/hr max) 12 Size of WQ Perf Pipe (Perf 1800) 13 Size of Overflow Perf Pipe (Perfs 3600) Voids Perc 7.0 ft 0.4 6.0 in/hr Dia pipe 18 in 12 in 14 Calculate Total Storage per Foot Spf Spf=Apf=WxD-Ap,,f_p;PexVoids+1/2 Perf Area 15 Calculate Design Length Override Value Required for Chambers 16 Variable Sand Window L 17 Variable Sand Window W 18 Time to Drain 90% volume in 48 -hours minimum 19 Length of WQ & Overflow Perf Pipes 20 Perf Pipe Checks. Qperf>= Qpeak; where Qperf=CdxAxJ(2xgxH) 28.3 ft3/ft L 2s ft P;\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE. SB 1(DA #1) 2-7-18.xlsm 3/5/2018,11:00 AM Version 8.2, October 2015 With New IDF Curves ACHD Calculation Sheet for Finding Peak Discharge/Volume - Rational Method NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. . - , Dos foiFESsak ft%aais Rafe tiffs eth i#aana 1311 aif'catcit a ii' o'rioddi€Toortten� Ogg, r Calculate Post -Development Flows (for pre•developmentflows, increase number of storage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED 02 PRIVATE SYSTEM 2 Is area drainage basin map provided? YES (map must be included with stormwater calculations) 3 Enter Design Storm (100 -Year or 25 -Year With 100 -Year Flood Route) 100 4 Enter number of storage facilities (25 max) 1 5 Area of Drainage Subbasin (SF or Acres) SF Acre, 6 Determine the Weighted Runoff Coefficient (C) C=[(ClxAl)+(C2xA2)+(CnxAn))/A Weighted Avi rc.t.en e6nv. AAnm Cu66eetne Ili Subbasin user Cacdate Subbasin Subbasin Subbasin 9 Calculate the Post -Development discharge (QPeak) Cb— Subbasin Subbasin Subbasin Subbasin 1 Subbasin2 3 4 5 Subbasin6 7 8 9 10 Enter Runoff Reduction Vol (95th Percentile=0.60-in x Area) V,r 35,622 15,883 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) 090 cis 0.10 •-3,25 P:ayB'ounds 020-035 Rol,oad yard areas 1.18 Urimwo:ed areas 0.10-0,30 Steer., azphah 095 concrrsc 095 Srfd: 055 0.95 0.95 Fields sandgsad SOD?:ca sfope .. ? C 0 0.95 ON 0.0% O.I1 0.15 A,trage 2.5`- 009 0.12 0.15 0.:0 7 Calculate Overland Flow Time of Concentration in Minutes (Tc) or use default 10 min user Cacdate 8 Determine the average rainfall intensity (i) from IDF Curve based on 1 7-58 in/hr 9 Calculate the Post -Development discharge (QPeak) Cb— 2,90 cis 10 Calculate total runoff vol (V) (for sizing primary storage) V 3,882 to V = Ci (Tc=60)Ax3600 0.35-050 2.1ult,-IwAtV 11 Calculate Vrr (for sizing WQfacilities) ride.bal uura[) 0.25 -0.=0 Enter Percentile Storm 1(Both percentile =0.34 in) 95th 0.60 in Enter Runoff Reduction Vol (95th Percentile=0.60-in x Area) V,r 2,426 it, 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) 090 cis 0.10 •-3,25 P:ayB'ounds 020-035 Rol,oad yard areas d,426 Urimwo:ed areas 0.10-0,30 Steer., azphah 095 concrrsc P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALLS\HARPER RIDGE SO 2 (DA 92&03) 2-7.18.alsm Version 8.2, October 2015 With New IDF Curves Estimated Runoff Coelfidents for Various Surfaces Type of Swfdce Runoff Cociidents "C• 5usines CosAtoc:n area: 0,70-095 Urban ne,ehborhood a,. -os 050-070 ne•idt Wol si.elc•fa-fy 0.35-050 2.1ult,-IwAtV 060-0,75 ride.bal uura[) 0.25 -0.=0 Av. ltmert d•tmlhog arra; 070 Industrial and Cann-artiai Light Neat Oso Hea-lv area: 090 Parks, ce,cbtariea 0.10 •-3,25 P:ayB'ounds 020-035 Rol,oad yard areas 0.20 -0 »0 Urimwo:ed areas 0.10-0,30 Steer., azphah 095 concrrsc 095 Srfd: 055 Root: 095 Fields sandgsad SOD?:ca sfope .. ? C 0 rlat 0.291 ON 0.0% O.I1 0.15 A,trage 2.5`- 009 0.12 0.15 0.:0 eta>d 16". 013 0.13 0.23 0.28 Asap:ed from ASl-E 3/5/2018,11:01 AM ACRD Calculation Sheet for Sand/Grease Traps NOTE: This worksheet is intended to be a guideline to standardize ACRD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #2 PRIVATE SYSTEM enter numoer or Sana/brease Reference for Throat widths (inch) P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 2. (DA tt2&#3) 2-7-18VW018, 11:01 AM Version 8.2, October 2015 With New IDF Curves Boise ADS Lar -ken WQU, Vault BMP 16 1000 G 48.0 50.5 n/a 1500 G 60.0 61.5 n/a WQU1000 n/a n/a 60 WQU1500 n/a n/a 60 P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 2. (DA tt2&#3) 2-7-18VW018, 11:01 AM Version 8.2, October 2015 With New IDF Curves ACRD Calculation Sheet for Sizing Seepage Bed With Optional Chambers NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result In facilities that meet or exceed these calculations in order to be accepted. Note this spreadsheet pulls information from the "Peak Q,V" tab Calculate Post -Development Flows (for pre -development flows, increase number of storage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #2 PRIVATE SYSTEM z Inter number or seepage Be(is (25 ma 3 Design Storm 4 Weighted Runoff Coefficient C 5 Area A (Acres) 6 Approved discharge rate (if applicable) 7 Design Vol W/15% Sediment 8 Set Total Design Width of All Drain Rock 1 0.95 Link to: LQ1V 1.18 acres QV TR55 0.00 cfs V 4,464 ft, W 15.0 ft 9 Set Total Design Depth of All Drain Rock D Rock Only, Do Not Include Filter Sand Depth or Cover 10 Void Ratio of Drain Rock 0.4 for 1.5"-2" drain rock and 3/4" Chips 11 Design Infiltration Rate (8 in/hr max) 12 Size of WQ Perf Pipe (Perf 1800) 13 Size of Overflow Perf Pipe (Perfs 3600) Voids Perc 10.0 ft 0.4 6.0 in/hr Dia pipe 18 In 12 in 14 Calculate Total Storage per Foot Spf Spf=Apf=WxD-AP„f pi,,xVoids+1/2 Perf—Area 15 Calculate Design Length Override Value Required for Chambers 16 Variable Sand Window L 17 Variable Sand Window W 18 Time to Drain 90% volume in 48 -hours minimum 19 Length of WQ & Overflow Perf, Pipes 20 Perf Pipe Checks. Qperf >= Qpeak; where Qperf=CdxAxd(2xgxH) L 60.3 ft3/ft 74 ft P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 2 (DA 112M) 2-7-18.xism 3/5/2018, 11:01 AM Version 8.2, October 2015 With New IDF Curves ACHD Calculation Sheet for Finding Peak Discharge/Volume - Rational Method NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. sssSa Peafs Calculate Post -Development Flows (for pre -development flows, increase number of storage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #3 PRIVATE SYSTEM 2 Is area drainage basin map provided? YES (map must be included with stormwotercalculations) 3 Enter Design Storm (100 -Year or 25 -Year With 100 -Year Flood Route) 100 4 Enter number of storage facilities (25 max) 1 5 Area of Drainage Subbasin (SF or Acres) SF Acre 6 Determine the Weighted Runoff Coefficient (C) C=((C1xA1)+(C2xA2)+(CnxAn)]/A Weighted Av) Subbasin Userealculate Subbasin Subbasin Subbasin inlhr Subbasin Subbasin Subbasin Subbasin 1 Subbasin 2 3 4 5 Subbasin 6 7 8 9 10 0.60 in Enter Runoff Reduction Vol (95th Percentile=0.60•in x Area) Yrr 3,606 16,068 60,476 cis 0 70 Industrial and eornrr.ercisl 1.76 tient areas t`! ..:a:i 9 natrai' iS,iOu pq 0.40 2,163 Parts, :erYettrtC, 0,10.0.25 Playgrounds 0.20-035 0.95 0.95 0.2p • 0::0 unm:nw•:eo areas 0.10.0.30 0.95' .tsphalt 0.95 co 095 brit 7 Calculate Overland Flow Time of Concentration in Minutes (Tc) or use default 10 min Userealculate 8 Determine the average rainfall intensity (i) from IDF Curve based on i 2.58 inlhr 9 Calculate the Post -Development peat. discharge (QPeak) Q„r 4,31 cis 10 Calculate total runoff vol (V) (for sizing primary storage) V 5,769 h' V = Cl (Tc=60)Ax3600 11 Calculate Vrr (for sizing WQfacilities) Sinelt•farrify Enter Percentile Storm I (80th percentile=0.34 in) 95th 0.60 in Enter Runoff Reduction Vol (95th Percentile=0.60•in x Area) Yrr 3,606 it, 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) cis 0 70 Industrial and eornrr.ercisl tient areas t`! ..:a:i 9 natrai' iS,iOu pq 0.40 2,163 Parts, :erYettrtC, 0,10.0.25 Playgrounds P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 3 (DA i14&05) 2-7.18.xI5m Version 8.2, October 2015 With New IDF Curves Estimated Runoll Coefftcitnls for Various Surfaces Type of Surface Runoll coefficients -C` 3ustness Oov:ntos•.n areas 0.70•:795 Wban ntiBhEorF.ocd areas 0.50 • 70 Sinelt•farrify 0 35 0 50 `.IuitFfamo; 060-075 irsidenlia) (rural) 0 25 - 0.0 �partmtnt c:':eiline arty. 0 70 Industrial and eornrr.ercisl tient areas O 3D rtt3w artas 0.40 Parts, :erYettrtC, 0,10.0.25 Playgrounds 0.20-035 Ra.4036 yxd areas 0.2p • 0::0 unm:nw•:eo areas 0.10.0.30 Steels .tsphalt 0.95 co 095 brit 035 Roofs 095 >mi Type 1re0c: SJady :oil 5!00e .. 3 e 0 ria: 0.2-: 0.0» 0.07 011 0.1' A,eraee bo'i �l^ep Tb=n 0.0? 0.12 OAS 0.20 0.13 0.18 0.23 a.2a Adapted from ASCE 3/5/2018,11:02 AM ACHD Calculation Sheet for Sand/Grease Traps NOTE: This worksheet Is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. ,_ e, s or Sh Gre , se Tra �/eiocit Calculatiat�, 3� _. ._�WIN User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #3 PRIVATE SYSTEM numuer or san Reference for Throat widths (inch) P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALLS\HARPER RIDGE SB 3 (DA #4&45) 2-7-18V50018, 11:02 AM Version 8.2, October 2015 With New IDF Curves Boise ADS Lar -ken WQU, Vault BMP 16 1000 G 48.0 50.5 n/a 1500 G 60.0 61.5 n/a WQU1000 n/a n/a 60 WQU1500 n/a n/a 60 P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALLS\HARPER RIDGE SB 3 (DA #4&45) 2-7-18V50018, 11:02 AM Version 8.2, October 2015 With New IDF Curves ACHD Calculation Sheet for Sizing Seepage Bed With Optional Chambers NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. Note this spreadsheet pulls information from the "Peak QV" tab Calculate Post -Development Flows (for pre -development flows, increase number of storage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #3 PRIVATE SYSTEM 4 tncer numoer or seepage seas its max) 3 Design Storm 4 Weighted Runoff Coefficient C 5 Area A (Acres) 6 Approved discharge rate (if applicable) 7 Design Vol W/15% Sediment V 8 Set Total Design Width of All Drain Rock W 9 Set Total Design Depth of All Drain Rock D Rock Only, Do Not Include Filter Sand Depth or Cover 10 Void Ratio of Drain Rock 0.4 for 1.5"-2" drain rock and 3/4" Chips 11 Design infiltration Rate (8 in/hr max) 12 Size of WQ Perf Pipe (Perf 180") 13 Size of Overflow Perf Pipe (Perfs 3600) Voids Perc 100 0.95 1.76 acres 0.00 cfs 6,635 15.0 ft 10.o ft 0.4 6.0 in/hr Dia pipe 18 in 12 in 14 Calculate Total Storage per Foot Spf Spf=Apf=WxD-AP„f pip,xVoids+l/2 Perf—Area 15 Calculate Design Length Override Value Required for Chambers 16 Variable Sand Window L 17 Variable Sand Window W 18 Time to Drain 90% volume in 48 -hours minimum 19 Length of WQ &. Overflow Perf Pipes 20 Perf Pipe Checks. Qperf>= Qpeak; where Qperf=CdxAxV(2xgxH) 1 Unk to: LQ1V Q,V TR55 ft3 60.3 Oft L 110 Pi\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAG E CALLS\HARPER RIDGE SB 3 (DA #4&#5) 2-7-18.xism 3/5/2018, 11:02 AM Version 8.2, October 2015 With New IDF Curves ACRD Calculation Sheet for Finding Peak Discharge/Volume - Rational Method NOTE: This worksheet is intended to be a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. 5t id_ Calculate Post -Development Flows (for pre -development flows, increase number ofstorage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE SED 04 PRIVATE SYSTEM 2 Is area drainage basin map provided? YES (mop must be included with stormwater calculations) 3 Enter Design Storm (100 -Year or 25 -Year With 100 -Year Flood Route) 100 4 Enter number of storage facilities (25 max) i 5 Area of Drainage Subbasin (SF or Acres) SF Acre; Subbasin uscrcauuiate la run. -1 Subbasin Subbasin Subbasin 9 Calculate the Post -Development peak discharge (CiPeak) Q-% Subbasin Subbasin Subbasin Subbasin 1 Subbasin 2 3 4 5 Subbasin 6 7 8 9 10 Enter Runoff Reduction Vol (95th Percentile=0.60-in x Area) VI, 2,730 ft, 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) .�_-a-2.. -,w ,,...s.u.n..xn... ac...�...=::n.r�.ro.._+.rv. rz,a.rw`...^._...a.....,.:....._.v...a.-..v.�..x_...a+..•u.+ur�-.:.ter Residenfat trust) 57,960 0.25 •0.a0 Aqa; imtr`t G:rtllmg areas _ t _.., ?_;,.. 1.33 ,3,02,; .� 0.S0 He areas 0.90 Park:, cetreteni s 0.10.023 Pia.;aroun3s 0.20.0.35 0.95 0.20.0+o unwom�ed areas 0.95 streets Aspitait 095 ton,rehl 095 6 Determine the Weighted Runoff Coefficient (C) C=((ClxAl)+(C2xA2)+(CnxAn))/A Weighted Avg 7 Calculate Overland Flow Time of Concentration in Minutes (Tc) or use default 10 min uscrcauuiate la run. -1 8 Determine the average rainfall intensity (I) from IDF Curve based on 1 2.58 in/hr 9 Calculate the Post -Development peak discharge (CiPeak) Q-% 3.26 ds10 Calculatetotal runoffvol (V) (for sizing primary storage) V 4,369 ft V = Ci (Tc=60)Ax3600 Urban oc:ghsarimaad a: eas 11 Calculate Vrr (for sizing WQ facilities) '+es,der,nal Enter Percentile Storm I (80th percentile =0.34 in) 95th 0.60 in Enter Runoff Reduction Vol (95th Percentile=0.60-in x Area) VI, 2,730 ft, 12 Detention: Approved Discharge Rate to Surface Waters (if applicable) .�_-a-2.. -,w ,,...s.u.n..xn... ac...�...=::n.r�.ro.._+.rv. rz,a.rw`...^._...a.....,.:....._.v...a.-..v.�..x_...a+..•u.+ur�-.:.ter Residenfat trust) cis rsss.a.x.uxe<�>a. 0.25 •0.a0 Aqa; imtr`t G:rtllmg areas _ t _.., ?_;,.. i'631 ,3,02,; .� P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE 56 4 (DAH6) 2-7-18.xism Version 8.2, October 2015 With New [OF Curves 3/5/2018,11:03 AM Estimated Runoff <oetfidents for Various Surfaces Type of surface Runoff Coefficients •'C'• 'ausiress u0:rn tot'm art05 0.70-095 Urban oc:ghsarimaad a: eas 0.50.070 '+es,der,nal sirfic•iaroil;• 0.3s • o sQ htutii•iamdy O.GO •. 0.: s Residenfat trust) 0.25 •0.a0 Aqa; imtr`t G:rtllmg areas 0.70 rduanai and con:a•.erC71 .Ig:lt area: 0.S0 He areas 0.90 Park:, cetreteni s 0.10.023 Pia.;aroun3s 0.20.0.35 R3:Iroaa -;w-- areas 0.20.0+o unwom�ed areas 0,10-030 streets Aspitait 095 ton,rehl 095 9nek 0 8s Roofs 0.95 Soil Tsae =hint. Sand; scii slop=A 3 C Flat O.2'e 0.0. 097 0.11 0.is Average 2-6°e 0.09 0.12 0.15 o.00 steep >G'i 0,13 015 0.3 0,2a Adaattd from ASc3 3/5/2018,11:03 AM ACHD Calculation Sheet for Sand/Grease Traps NOTE: This worksheet Is intended to he a guideline to standardize ACHD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. _5,.psfOCSa Id/�reaseFfCa �%ilOCitysjCtllBtQll., User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #i4 PRIVATE SYSTEM triter numoer or aana/urease Reference for Throat widths (inch) Number of Peak Flow Baffle Throat Velocity WQU, Vault Size SIG Traps Q-cfs Spacing width Area (W) 0.5 fps BMP 16 1000 G 48.0 50.5 (inch) (inch) 60.0 max. DV�elocity 1000 G 1 3.26 20 48 6.67 0 49 60 Reference for Throat widths (inch) P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 4 (DA #6) 2-7-18.xisn3/5/2018, 11:03 AM Version 8.2, October 2015 With New IDF Curves Boise ADS Lar -ken WQU, Vault BMP 16 1000 G 48.0 50.5 n/a 1500 G 60.0 61.5 n/a WQU1000 n/a n/a 60 WQU1500 n/a n/a 60 P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CALCS\HARPER RIDGE SB 4 (DA #6) 2-7-18.xisn3/5/2018, 11:03 AM Version 8.2, October 2015 With New IDF Curves ACHD Calculation Sheet for Sizing Seepage Bed With Optional Chambers NOTE; This worksheet is intended to be a guideline to standardize ACRD checking of drainage calculations and shall not replace the Engineer's calculation methodology. These calculations shall establish a minimum requirement. The Engineer's methodology must result in facilities that meet or exceed these calculations in order to be accepted. Note this spreadsheet pulls information from the "Peak OV" tab Calculate Post -Development Flows (for pre -development flows, increase number of storage facilities to create new tab) User input in yellow cells. 1 Project Name HARPER RIDGE SEEPAGE BED #4 PRIVATE SYSTEM Inter numner or seepage Beds (Z5 max) 1 3 Design Storm 100 4 Weighted Runoff Coefficient C 0.95 link to: O V- 5 Area A (Acres) 1.33 acres Q,V TR55 6 Approved discharge rate (if applicable) 0.00 cfs 7 Design Vol W/15% Sediment V 5,024 ft3 8 Set Total Design Width of All Drain Rock W 18.0 ft 9 Set Total Design Depth of All Drain Rock D Rock Only, Do Not Include Filter Sand Depth or Cover 10 Void Ratio of Drain Rock 0.4 for 1.5"-2" drain rock and 3/4" Chips 11 Design Infiltration Rate (8 in/hr max) 12 Size of WQ Perf Pipe (Perf 1800) 13 Size of Overflow Perf Pipe (Perfs 3600) 14 Calculate Total Storage per Foot Spf=Apf=WxD-APe1f pip,xVoids+l/2 Perf Area 15 Calculate Design Length Override Value Required for Chambers 16 Variable Sand Window l 17 Variable Sand Window W 18 Tirne to Drain 90% volume in 48 -hours minimum 19 Length of WQ & Overflow Perf Pipes 20 Perf Pipe Checks. Qperf>= Qpeak; where Qperf=CdxAxV(2xgxH) Voids Perc 10.0 ft 0.4 6.0 in/hr Dia pipe 18 in 12 in Spf 72.3 fe/ft P:\Doug McMaster\Harpers Ridge Subdivision\Documents\DRAINAGE CAICS\HARPER RIDGE SB 4 (DA #6) 2-7-18.xism 3/5/2018, 11:03 AM Version 8.2, October 2015 With New IDF Curves I =i - I' o - III /.Y•. tlm/el1.v. �.M • _ t �_ •iE �. �I I oasssissi - !il°tab°la1°I•�'•;•°�ti ::; ::;: �i;ai aO:•• OO�o�oi � • • 00 ♦• •.•oA ry.•� .•1•••• �•i•••1•{ - - •- 1•• -- - --- r E ■ @ ]k E \� 'A \ ik \ ! ] \( \§ | ik )]) clT+m&ell & Associates ` 885 E. HA"\& RIDGE SUBDIVISION /aD SSI« *g,�!�(2003450566%+_��mom2gEll` / \ |§- !) , , ! ] \( )]) clT+m&ell & Associates ` 885 E. HA"\& RIDGE SUBDIVISION /aD SSI« *g,�!�(2003450566%+_��mom2gEll` / \ |§- !) , ,