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Application Materials
Hearing Date: July 6, 2017 File No.: H-2017-0083 Project Name: Summerwood Subdivision - PP Request: Request for a preliminary plat consisting of 26 building lots and 5 common lots on 9.98 acres of land in an R-4 zoning district, by WHPacific Inc. Location: The site is located at 4052 and 4202 W. Daphne Street, North of McMillan Road and East of Black Cat Road, in Section 27, Township 4N., Range IW. E IDIAN�- IIaAHt� EC C IVE JUN Q 1 2017 Planning Division E3Y:DFyl T REVIEW APPLICATION STAFF USE ONLY : � C��� Project name: hX�(� �/ File number(s): 14 1"2,( 1 -7- 6 05 3 Assigned Planner: Jos —Related files: Type of Review Requested (check all that apply) ❑ Accessory Use ❑ Administrative Design Review ❑ Planned Unit Development ® Preliminary Plat–H– Zo t -7-- ODE ❑ Alternative Compliance ❑ Private Street f ~"kJO4 SL I ❑ Annexation and Zoning ❑ Property Boundary Adjustment ❑ Certificate of Zoning Compliance ❑ Rezone ❑ City Council Review ❑ Short Plat ❑ Comprehensive Plan Map Amendment ❑ Time Extension: ❑ Comprehensive Plan Text Amendment Director/ Commission/Council (circle one) ❑ Conditional Use Permit ❑ UDC Text Amendment ❑ Conditional Use Modification ❑ Vacation: Director/Commission (circle one) Director/ Council (circle one) © Development Agreement Modification Variance ❑ Final Plat C-4irn(ulr ❑ Other ❑ Final Plat Modification --.>ob -MOA Applicant Information Applicant name: Jane Suggs/WHPacific Inc Phone: 275-8729 Applicant address: 2141 W Airport Way, Ste 104 Email: -isuizgs@whpacific.com City: Boise State: ID Zip: 83705 Applicant's interest in property: ❑ Own ❑ Rent ❑ Optioned 17 Other Agent Owner name: Bridgetower Investments Inc Phone: 415-747-6882 Owner address: 2228 W Piazza Dr. Email: City: Meridian State: ID Zip: 83646 Agent/Contact name (e.g., architect, engineer, developer, representative): Jane Suggs Firm name: WHPacific Inc. Phone: 275-8729 Agent address: 2141 W Airport Way Ste 104 Email: -isulzgs@whpacific.com City: Boise State: ID Zip: 83705 Primary contact is: IN Applicant ❑ Owner ❑ Agent/Contact Subject Property Information Location/street address: 4202/4052 Danhne St Township, range, section: 4N, IW, 27 Assessor's parcel number(s): R0982010125/R0982010150 Total acreage: 9.93 Zoning district: R-4 Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 www.meridiancitv.org[planning -I- (Rev. 06/12/2014) Project/subdivision name: Summerwood Subdivision General description of proposed project/request: Single Family subdivision with 26 buildable lots and 5 common lots, plus 1/2 acre green space Proposed zoning district(s): R-4 Acres of each zone proposed: 9.93 Type of use proposed (check all that apply): ® Residential ❑ Office ❑ Commercial ❑ Employment ❑ industrial ❑ Other Who will own & maintain the pressurized irrigation system in this development? Bridgetower West HOA Which irrigation district does this property lie within? Settlers Irrigation District Primary irrigation source: Surface Water Secondary: Well Square footage of landscaped areas to be irrigated (if primary or secondary point of connection is City water): 34.886 sa ft Residential Project Summary (if applicable) Number of residential units: 26 Number of building lots: 26 Number of common lots: 5 Number of other lots: Proposed number of dwelling units (for multi -family developments only): 1 bedroom: 2-3 bedrooms: 26 4 or more bedrooms: Minimum square footage of structure (excl. garage): Maximum building height: 35' Minimum property size (s.f): 9360 Average property size (s.f.): 11,938.55 Gross density (Per UDC ll -IA -1): 2.62 Net density (Per UDC 11 -IA -1): 3.65 Acreage of qualified open space: .80 acres Percentage of qualified open space: 8.1 Type and calculations of qualified open space provided in acres (Per UDC 11 -3G -3B): Amenities provided with this development (if applicable): green space,_park, clubhouse within 1000' Type of dwelling(s) proposed: IN Single-family Detached ❑ Single-family Attached ❑ Townhouse ❑ Duplex ❑ Multi -family ❑ Vertically Integrated ❑ Other Non-residential Project Summary (if applicable) Number of building lots: Common lots: Other lots: Gross floor area proposed: Hours of operation (days and hours): Total number of parking spaces provided: Authorization Print applicant name: Jane S Applicant signature: Existing (if applicable): Building height: Number of compact spaces provided: Date: Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 www.meridianci , .o&planning -2- (Rev. 06/12/2014) WHN(ffirc May 30, 2016 Mr. Josh Beach City of Meridian Planning Division 33 E. Broadway Avenue Meridian, ID 83642 Subject: Summerwood Subdivision in Bridgetower West 4052/4202 Daphne Street Dear Mr. Beach: Please accept the attached applications for the development of the Summerwood Subdivision, part of the Bridgetower West development, located just east of Vicenza Subdivision. Summerwood is a resubdivision of Lots 6 and 7, Block 2 of Black Cat Estates #2 Subdivision. (4N, 1W, Section 27). You may recall that a preliminary plat for this property was previously approved in 2014 and the property was annexed into Meridian with an R-4 (Medium Low Density) zoning designation back in 2009. The proposed development meets the land use designation and policies of the Comprehensive Plan and also meets all requirements of the Unified Development Code (UDC) for subdivision development. The project site is 9.9 acres and there are homes/structures located on both lots. These structures will be removed prior to construction. Subdivision A preliminary plat and additional support materials are included with our application package. The subdivision includes a total of 31 lots, with 26 lots for single family detached residential homes and 5 common/open space lots. The previously approved preliminary plat included 30 buildable lots with a similar layout of streets and lots. A traffic study was not required for this development, per ACHD. We've include some photos of the conceptual home designs in our application package. The common lots, including endcap/buffers and open space, total 0.8 acres or approximately 8% of the 9.9 acres. Please note that the Vicenza/Volterra neighborhood park, with clubhouse and pool, is a short walk (less than 1000 feet) from Summerwood Subdivision. Landscaping The landscape plan included with our application shows attractive landscaping throughout the subdivision. We have continued the side yard end caps along W. Wapoot Street and on the connection to Joy Street to allow for appealing street side plantings. The green space in the middle of the subdivision will include an open play area, meandering sidewalk, and benches under the abundant trees and shrubs. This area will provide an attractive meeting spot for neighbors. 2141 Airport Way, Ste 104• Boise, ID 83705 • T 208.342.5400 • F 208.342.5353 • www.whpacific.com Wupd ffic All common lot landscaping will be maintained by the Bridgetower West Homeowners Association. Utilities Potable water and sewer service will be extended to Summerwood via Wapoot Street in the Vicenza Subdivision. Pressurized irrigation is provided by Settler's Irrigation. The1�rigation supply ditch that runs diagonally through the two lots will be intercepted at the southeast corner of the properties and piped along the south and west boundaries, to be discharged at the existing discharge location on the west boundary. This irrigation ditch supplies water to an 8.5 acre property, northwest of Summerwood. We are in contact with the owner of this offsite property to make sure his irrigation water is not impeded. Neighborhood Meeting A well -attended neighborhood meeting was held on Wednesday, May 10th at 6 pm at the Volterra/Vicenza clubhouse at 3840 W. Gondola Drive. This neighborhood meeting was advertised to discuss both the Summerwood preliminary plat and the Development Agreement Modification for Bridgetower/Cottonwood. Residents were generally pleased with the current subdivision layout; especially with the reduced number of buildable lots and the increased size of those lots. There were a few questions about pavers in the streets, the schedule for completing/opening the clubhouse pool and some concern about dust during construction. There were no questions regarding the Development Agreement modification. The application materials include the neighborhood meeting signup sheet and the meeting notes that were forwarded to the neighbors who provided email addresses. In summary, we request your approval of another quality subdivision into the Bridgetower West community and the City of Meridian. We look forward to working with you and the staff during the approval process for Summerwood Subdivision. Please do not hesitate to contact me if you have questions about our applications or the project. Sincerely, a e B. Suggs A LIJ z�s 9 <4 Zv 37 3 j Z O c a d g 2 w S w 4 �� w 0 tt-f m `�' o m ,T, ud<. 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Q �,C.��ry ga_`.-a^p=;soa°';a�i�_°�Gn z°s fig' o ea=8 *�`p_mY ee �o So< o o 'e' Yfe 's` a€oa-A sg ��� �' Eb^ o�c`eS fr.�O.i:• i�p35 °r: '.E�o ° i O 5 ` R I �5 ❑ � � .0 � � ,fi6'659 A�.ZZAZCOH 3 gg� " jo m 1 ry. - �\ J��32llS AOf H aczco� 1 O � ♦3 � h o • :g � � e p 3 � o � s � � a � � � s � _ � g = � m gu��� �9� o F' � �m 51 -19 Al e K®c e0*e a ° 0 I i I I rn a R2NUN rco5N m NU 4� m 0 W N is U w a � W IOTmf1 ADA COUNTY RECORDER Christopher D. Rich 2015-073134 BOISE IDAHO Pgs=3 CHE FOWLER 08/11/2015 08:36 AM TITLEONE BOISE $16.00 TitleOne a title &escrow co. Order Number: 15254154 A WARRANTY DEED For Value Received, Kent Pintus, a married man as his sole & separate property and Gerald Saxton, a married man as his sole & separate property, the Grantor, does hereby grant, bargain sell and convey unto, Bridgetower Investments, LLC, an Idaho limited liability company, whose current address is 55 Tappan Rd, San Anselmo, CA 94960, the Grantee, the following described premises, in Ada County, Idaho, To Wit: Parcel I: Lot 6 in Block 2 of Black Cat Estates No. 2, according to the official plat thereof, filed in Book 32 of Plats at Pages 1945 and 1946, official records of Ada County, Idaho. Parcel II: Lot 7 In Block 2 of Black Cat Estates No. 2, according to the official plat thereof, filed in Book 32 of Plats at Pages 1945 and 1946, official records of Ada County, Idaho. TO HAVE AND TO HOLD the said premises, with their appurtenances unto the said Grantee, its heirs and assigns forever. And the said Grantor does hereby covenant to and with the said Grantee, that Grantor is the owner in fee simple of said premises; that they are free from all encumbrances EXCEPT those to which this conveyance is expressly made subject and those made, suffered or done by the Grantee; and subject to all existing patent reservations, easements, right(s) of way, protective covenants, zoning ordinances, and applicable building codes, laws and regulations, general taxes and assessments, including irrigation and utility assessments (if any) for the current year, which are not due and payable, and that Grantor will warrant and defend the same from all lawful claims whatsoever. Whenever the context so requires, the singular number includes the plural. Dated: 1? _ c9 - a0/�-' Warranty Deed r.___ • _rn Page 1 of 3 05131/2017 10:29 AM Kent Pin s Gerald Saxton ` State of _��, County of Q h, ss. On this day of July in the year of 2015, before me, the undersigned, a Notary Public in and for said State, personally appeared Kent Pintus, known or identified to me to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same. AMANDA M HOLDEN 40u bIICNotary Public tah My Commission Expires: � 12 � 211 ? � _ state of res My Commission Expires 03-23-2818 (seal) COMMISSION NO. 6826M State of . County of ss. On this day of July in the year of 2015, before me, the undersigned, a Notary Public in and for said State, personally appeared Gerald Saxton, known or identified to me to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same. Notary Public My Commission Expires: (seal) Warranty Deed Page 2 of 2 Page 2 of 3 05/31/201710:29 AM Kent 'ntus Gerald Saxton State of , County of SS. On this day of July in the year of 2015, before me, the undersigned, a Notary Public in and for said State, personally appeared Kent Pintus, known or identified to me to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same. Notary Public My Commission Expires: (seal) State of , County of G \ %v Lkt-tc. , ss. On this t"" day of n the year of 2015, before me, the undersigned, a Notary Public in and for said State, personally appeared Gerald Saxton, known or identified to me to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same. My Commission Expires: (seal) Warranty Deed SCOTT LEE STODDARD Notary Public • State of Utah Commission # 656131 COMM. EXP. 01-14-2017 Page 3 of 3 05/31/2017 10:29 AM AFFIDAVIT OF LEGAL INTEREST STATE OF IDAHO COUNTY OF ADA I Mike McCollum 55 Tappan Road, , , (name) (address) San Ansehno Callifornia 94960 (city) (state) being first duly sworn upon, oath, depose and say: That I am the record owner of the property described on the attached, and I grant my permission to: Jane Suggs 2141 Airport Way, Boise Idaho 83705 (name) (address) 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. 3. I hereby grant permission to City of Meridian staff to enter the subject property for the purpose of site inspections related to processing said application(s). Dated this day of , 20_ r (Signature) SUBSCRIBED AND AR to before me the day and year first above written. ♦4�l�� �� p U sk N't '' GaaoS ��� •� • &49 - (Notary Public fo daho) * *9 P � lG Residing at:_� O UB1, s*O••� i,• My Commission Expires: Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 mvw.meridiancity.org/plannins PROJECT LOCATION W Gondola Dr W Wapool S1 0 W. Milano S t._. _ ?3 N W Daphne S f z ! t W Dauphne St f f a _ c m z 2 W RivaCaprl St j f W McMillan Rd _ _ - z - -_ W McMillan Rd f f _ i 4 t i f i f f i Sources: Esri, HERE, Del_orme, USGS, Intermap, increment P Corp., NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), Mapmylndia, © OpenStreetMap contributors, and the GIS User f Community Summerwood Subdivision N Meridian, Idaho 0 150 300 600 900 1,200 Feet Project/Subdivision Name: City staff: MJ r _ f5+vie , ,1r 1 Location: Comprehensive Plan FLUM Designation: Design Guidelines D velopment Context: Existing Use: Proposed Use: 6W Surrounding Uses: S t=2 Street Buffer(s) and/or Land Use Buffers Open Space/Amenities/Pathways: ' i 2lb Access/Stub Streets/Street System: W. Sewer & Water Service: �-J , W Waterways/ Floodplain/Topography/ aza History: CITY OF MERIDLAN PRE-.APPLICATIm.IMEETiwG NoTFs Urbamuburban I Existing Zoning: _ — Proposed Zoning: Date: Size of Property: Note: A Traffic Impact Study (Tl5) will he required byACHD forlarge commercial projects and anyresidenfiai development with over 100 units. To avoid unnecessary delays & expedite the hearing process, applicants are encouraged to submit the TIS to ACHD prior to submitting their application to the City. Not having ACHD comments and/or conditions on large projects may delay hearing(s) at the City. Please contact Mindy Wallace of 387- to 87to a TIS, conditions, impact fees and process. J Other Agencies/Departments to Gontact: EFAda County Highway Dist. (ACRD) ❑ Nampa Meridian irrigation Dist. (NMID) ❑ Public Works Department Idaho Transportation Dept. (ITD) ❑ Settler's Irrigation District ❑ Building Department ❑ Republic Services ❑ Police Department ❑ Parks Department ❑ Central District Health Department (Fire Department ❑ Other: Application(s) Required: ❑ Administrative Design Review ❑ Conditional Use Permit Modification/Transfer ❑ Rezone ❑ Alternative Compliance (j Development Agreement Modification ❑ Short Plat ❑ Annexation ❑ Final Plat ❑ Time Extension -- Council ❑ City Council Review ❑ Final Plat Modification ❑ UDC Text Amendment ❑ Comprehensive Plan Amendment- Map ❑ Planned Unit Development ❑ Vacation ❑ Comprehensive Plan Amendment- Text X Preliminary Plat ❑ Variance ❑ Conditional Use Permit ❑ Private Street ❑ Other Notes: 1) Applicants are required to hold a neighborhood meeting in accord with UDC 11 -5A -5C prior to submittal of an application requiring a public hearing (except for a vacation or short plat); and 2) All applicants for permits requiring a public hearing shall post the site with a public hearing notice in accord with UDC 11 -5A -5D.3 (except for UDC text amendments, Comp Plan text amendments, and vacations). The information provided during this meeting is based on current UDC requirements and the Comprehensive Plan. Any subsequent changes to the UDC and/or Comp Plan may affect your submittal and/or application. This pre -application meeting shall be valid for four (4) months. 1NHPaclfic Summerwood Subdivision Bridgetower/Cottonwood Development Agreement Modification Neighborhood Meeting Wednesday, May 10, 2017 6 pm Interested in Name Address Phone/e-mail Sub or DA? I'-C�io_nc_ Sl ic_lo'6(i"eg4(oO(L.aunq 3. RJ 01 -- CO q 4. 542& d d i2b'Cvb/(tIke_ r l�j_uyi ald-Or6a)-roi^nas-1 /(-i 5. Gt;vl A14('10r o S� 1'1'tl �bQhc��(�GsOfY�Cll�Si: /� 6. 7. 8. 9. 10. 11. 12. 13. 14. 15, 16. 17. 18. 19. 2141 Airport Way, Ste 104• Boise, ID 83705 • T 208.342.5400 • F 208.342.5353 • www.whpacific.com . CLVK VA COMMITMENT OF PROPERTY POSTING Per Unified Development Code (UDC) 11 -5A -5D, the applicant for all applications requiring a public hearing (except for a UDC text amendment, a Comprehensive Plan text amendment and/or vacations) shall post the subject property not less than ten (10) days prior to the hearing. The applicant shall post a copy of the public hearing notice of the application(s) on the property under consideration. The applicant shall submit proof of property posting in the form of a notarized statement and a photograph of the posting to the City no later than seven (7) days prior to the public hearing attesting to where and when the sign(s) were posted. Unless such Certificate is received by the required date, the hearing will be continued. The sign(s) shall be removed no later than three (3) days after the end of the public hearing for which the sign(s) had been posted. I am aware of the above requirements and will comply with the posting requirements as stated in UDC 11-5A-5. Applicant/agent signat re Date Community Development ■ Planning Division ■ 33 E. Broadway Avenue, Ste. 102 Meridian, Idaho 83642 Phone: 208-884-5533 Fax: 208-888-6854 www.meridianci , .org/planning Meridian City Hall, Suite 102 C�N-E ���AN � 33 E. Broadway Avenue k' ' � 0 Meridian, Idaho 83642 Community Development 208.887.2211 Department Parcel Verification Date: 5/11/17 The parcel information below has been researched and verified as correct by the City of Meridian Community Development Department. Project Name: Summerwood Subdivision Parcel Numbers: R0982010125 (4.89 Acres) R0982010150 (5.041 Acres) T/R/S: 4N 1W 27 Property Owner: Bridgetower Investments, LLC 55 Tappan Rd. San Anselmo, CA 94960 Address Verification Rev: 04/23/12 Cara Duskey From: Sub Name Mail <subnamemail@adaweb.net> Sent: Monday, May 15, 2017 3:42 PM To: Cara Duskey Subject: Summerwood Subdivision Name Reservation May 15, 2017 Cara Duskey, WH Pacific RE: Subdivision Name Reservation: SUMMERWOOD SUBDIVISION At your request, I will reserve the name Summerwood Subdivision for your project. I can honor this reservation only as long as your project is in the approval process. Final approval can only take place when the final plat is recorded. This reservation is available for the project as long as it is in the approval process unless the project is terminated by the client, the jurisdiction or the conditions of approval have not been met, in which case the name can be re -used by someone else. Sincerely, From: Cara Duskey[ma iIto: CDuskey(a@whpacific. com] Sent: Friday, May 12, 2017 12:06 PM To: Sub Name Mail Subject: [EXTERNAL] RE: Subdivision Name Glen, The parcel numbers are 80982010125, R0982010150 Thanks Cara Cara Duskey I Administrative Assistant WHPacific, Inc. 1 2141 W Airport Way, Ste 104, Boise, ID 83705 Direct 208.275.8700 1 Fax 208.342.5353 1 cduskey@whpacific.com Enhancing Client Satisfaction through Creative, Exceptional Service NIVISDC Certifier) MBEICPLIC Certified MBE From: Sub Name Mail [mailto:subnamemail@adaweb.netj Sent: Friday, May 12, 2017 11:42 AM To: Cara Duskey <CDusl<ev@whpacific.com> Subject: RE: Subdivision Name Cara; Back when this originally reserved, we did not have very specific information on the location of the proposed plats. What are the current parcel numbers of the property to be included in the pre -plat? Glen Smallwood Surveying Technician Ada County Development Services 200 W. Front St., Boise, ID 83702 (208) 287-7926 office (208) 287-7909 fax From: Cara Duskey [ma i Ito: CD uskey0wh pacific. com] Sent: Tuesday, May 09, 2017 11:00 AM To: Sub Name Mail Cc: Jerry Hastings Subject: [EXTERNAL] RE: Subdivision Name Glen, In regards to the subdivision name Summerwood, if it is acceptable that we use the name on the property that was previously pre platted with that name can you send me a response similar to this; "At your request, I will reserve the name Summerwood Subdivision for your project. I can honor this reservation only as long as your project is in the approval process. Final approval can only take place when the final plat is recorded. This reservation is available for the project as long as it is in the approval process unless the project is terminated by the client, the jurisdiction or the conditions of approval have not been met, in which case the name can be re -used by someone else." Thank you. Cara Cara Duskey I Administrative Assistant WHPacific, Inc. 1 2141 W Airport Way, Ste 104, Boise, ID 83705 Direct 208.275.8700 1 Fax 208.342.5353 1 cduskey@whpacific.com Enhancing Client Satisfaction through Creative, Exceptional Service NMSDC Certified MB£/CPLIC Certifier) MBE From: Sub Name Mail [mailto:subnamemail@adaweb.net] Sent: Thursday, April 13, 2017 9:03 AM To: Cara Duskey <CDuskey@whpacific. com> Cc: Jerry Hastings <jhastings adaweb.net> Subject: RE: Subdivision Name Ca ra; The name reservations are reserved "as long as the project is in the approval process". 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Based on the results of our investigation and evaluation, we believe the property is acceptable, from a geotechnical perspective, for the proposed project. The construction and civil engineering recommendations presented within this report are to be incorporated into the project plans and specifications and adhered to during design and construction. Recommendations are provided for the design and construction of earthwork, foundations, slab on grade concrete, flexible pavements, storm water disposal and inspection and compaction testing. We appreciate this opportunity to be of service and we look forward to working with you during the design and construction of this project. Should you have any questions or require additional information, please contact our office at your convenience. it Bola J. Arnold, PE 8717 Graydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 2010 — _ Page 2 of 20 TABLE OF CONTENTS Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services EXECUTIVESUMMARY........................................................................................ 3 INTRODUCTION.................................................................................................... 4 Purposeand Scope.....................................................................................4 Authorization.. .... .... ................................................................5 Warrantyand Limitations ............................................................................. 5 RESEARCH& BACKGROUND............................................................................ 6 General........................................................................................................6 FieldInvestigation........................................................................................ 6 ObservedConditions.................................................................... .........7 CONSTRUCTION RECOMMENDATIONS............................................................ 8 FoundationSystem.....................................................................................8 Foundation Excavation .............................................. :........... ...................... 8 StructuralFill. ...... .................................. .......... .. .... ..9 Foundation and Utility Excavations..............................................................10 SiesmicSetting . ................................................................................... 10 Slab on Grade Concrete ........ ........... ... . .........1 p Flexible Pavement Section .................................................................... 41 StormwaterDisposal...................................................................... .........1.., 12 GENERALCOMMENTS........................................................................................12 APPENDIX.............................................................................................................13 oc Bob J. Arnold, PE 6717 Craydon Drive Boise, Idaho 83704 130 Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services 208-440-6276 * Fax 208.323-78.66 EXECUTIVE SUMMARY g Groundwater was encountered between 2.0' & 6.6' feet below the existing surface.. Groundwater is typically shallower on the, west end and east ends of the property and deeper in the middle, half way between Biackcat & Ten Mile Roads. This is due to surface elevation. Groundwater can be expected to rise and fail with changes in the irrigation season. a Cultivated topsoil is present on most of the property. Cultivation has extended to 18-20" below the existing surface. Recompaction of this disturbed soil is required under future pavements, buildings and structural fills. Subgrade surfaces that will support structural fill, foundations, slab on grade concrete, or driveway and parking area pavement are to be proof -rolled to confirm stability. Any deflecting, wet, or soft area is to be aver -excavated to sound bearing materials or as directed by this engineer. Subgrade surfaces and/or structural fill are to be compacted to 96% of the maximum dry density as determined by ASTM D698, "Standard Proctor." The proposed buildings may be supported on conventional, continuous, and isolated pad foundations. Foundations constructed atop structural fill or upon the native soils can be designed to exert bearing pressures of up to 1600 psf. ® The presence of clay soils indicates that ACHD's standard pavement section is appropriate for this development. Residential streets should be designed for 2.5" ACP, 4.0" road base and 14.011 sub base. if clays soils are removed or will be penetrated by site grading operations, then subgrade samples should be taken for R -Value Testing. This may greatly reduce pavement section thickness. Given the shallow groundwater, stormwater drainage should be retained on the surface. A percolation rate P=1" per hour is Appropriate for the native surface soils. If drainage facilities. extend to the native sand and gravels a percolation rate P=8" per hour may be used for design. Bob J. Arnold, PE $717 Graydon Drive Boise, Idaho 83704 208-440-6276 )er 14, 2010 PURPOSE AND SCOPE Fax 208-323.7866 * INTRODUCTION Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services rnoldpe@msn.corn 110925001.doc This report presents the results of a Geotechnical Evaluation performed for a proposed residential development currently referred to as Volterra. Subdivision. This property includes two parcels; one is north of McMillan Road between Ten Mile and Black Cat Roads and the second is at the southwest corner of Ten Mile and McMillan Roads. The aerial photo below is from Ada County Assessor website and shows the property limits as explained to this consultant. Bob J, Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323.7866 December 14, 2010 Page Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services * blarnoldne0misn.cam The purpose of this investigation was to evaluate the subsurface soil conditions and provide recommendations for subdivision development and residential construction. The field investigation included subsurface exploration by means of a wheel mounted backhoe operated by an independent contractor retained for this purpose. Soil samples were gathered and returned to the soil laboratory for testing. After the field investigation and laboratory testing was completed, all available field and laboratory test data was reviewed, the provided design information was evaluated, and this report was prepared. This report summarizes our findings, conclusions, and recommendations regarding the geotechnical aspects of the project. AUTHORIZATION E-mail authorization to proceed with this geotechnical investigation was received from the client, Mr. Justin Blackstock on September 22, 2011. Authorization to proceed and the use of the recommendations provided herein indicate the client's acceptance of the scope of work, warranty, limitations and general conditions provided herein and within the submitted and approved proposal. WARRANTY AND LIMITATIONS The exploration and evaluation of subsurface conditions documented herein is considered sufficient to form a basis for the provided recommendations. The provided recommendations are based on the available soil information and preliminary design details either assumed or furnished by the client. it is warranted that these recommendations have been promulgated after being prepared in accordance with locally accepted professional engineering and geotechnical engineering practice. No other warranties are implied or expressed. Bob J. Arnold, PE 8717 Craydon Drive wise, Idaho 83704 ` p JM Arnold, P Civil Engineering Geotechnicacai Engineering Materials Testing &Inspection Services 208-440-6276 * Fax 208-323-7866 * bj�alrnoldpe@msn.com December 14, 2010 Page ti of 20 110925001.doe RESEARCH & BACKGROUND GENERAL As authorized by the client, this consultant observed the excavation of eight test pits on the subject property. At the time of this investigation, the subject property was generally flat, firm, and stable and allowed complete access by the backhoe. Test pits were excavated by Superior Excavation of Meridian, Idaho. Locations were selected by this engineer and were limited to the perimeter of farm fields already harvested. Corn was still present in one field north and one south of McMillan Road. Onions were also present in a field north of McMillan. All test pits were located north of McMillan Road. A large irrigation ditch or canal (temp?) cross the property southwest of Ten Mile and McMillan Roads. The banks of this canal were examined for soil profile data. Client also supplied a historical report by Associated Earth Sciences on this property. It was reported that the project will include site built, wood frame structures with concrete strip foundations, Most of the property is planned to be single family residential lots with some multifamily units possible in the east end, near Ten Mile Road. Recommendations for subdivision development including pavements sections, storm water disposal, bridge construction, and residential building pad construction were requested. FIELD INVESTIGATION Test pits were advanced to depths ranging from 7.0 to 12.0 feet below the existing ground surface. During excavation, samples were recovered from the spoil piles as excavation was performed, These samples were sealed in plastic bags, labeled, and returned to the laboratory for evaluation and analysis. Deeper excavation was not possible due to sloughing conditions. In the laboratory, sieve analysis (ASTM Test Method C136-93), Moisture Content (ASTM Test Method 2216-92) and Liquid Limit, Plastic Limit and Plasticity Index (ASTM Test Method D 4318-93) testing were performed on selected samples. Tests were performed in general accordance with the cited ASTM test methods. All test results are included in the Test Fait Logs located in the Appendix. Bob J. Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 20 OBSERVED CONDITIONS Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services .doo The surface soils on this property were firm and stable at the time of this investigation. Much of the property appears to have been land leveled to improve irrigation. This is based upon a varying depth of top soil over the cemented silt layer. in the two most western test pits (TP1 & TP2) fill was clearly present over the original native surface soils. Some granular materials have previously been added to the field access roads where TP1 and TP2 were excavated. It is noted that the farm fields adjacent to these locations are at similar elevations, confirming land leveling efforts. The surface soils are typically nonplastic silt but some clay and some cemented silts were also sampled near the surface. In the west end of the property lean clays are present in the upper stratum and extend to 4.5 feet in depth. This is the exception. In most test pits surface soils are silt or weakly cemented silts with cementing increasing with increased depth. The surface soils extend to pitrun type sand and gravel. These soils were contacted at 3.0-6.0 feet below the surface except at test pit #4 where the gravels were ten feet deep with cemented silts above. Groundwater was observed entering all test pits once the gravel layer was reached. Piezometers were installed in most test pits. Two weeks after excavation water levels were measured in the piezometers. Depths ranged from 2.0' in TP1 in the west end of the property; to 6.6' in TP4 & TP5 in the center of the property; to 2.7' in TP7 in the east end of the property. Two older piezometers installed by others were located south of McMillan Road. Water levels were measured at 4.0' (west) and 3.5' (north) in these two locations. Bob J. Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208.323-7866 * 2010 Civil Engineering Geotechnical Engineering Materials Testing & Inspection services CONSTRUCTION RECOMMENDATIONS FOUNDATION SYSTEMS 0928001.doc The recommended. foundation system is based upon information contained in this report. This includes both the researched and the assumed information. Residential units, both single and multifamily structures, may be supported on conventional, continuous foundations with isolated pads used for concentrated point loads such as decks, carports or patio covers. Foundations founded upon native soils or upon structural fill that extend to native soils may designed to exert bearing pressures of up to 1500 psf. Any bridge constructed over the irrigation canal on the southwest corner of McMillan Road and Ten Mile Road should be constructed on spread foundations that are founded atop the deeper native sand and gravels. Foundations founded upon the native sand and gravels or upon structural fill that extend to these native soils may be designed to exert bearing pressures of up to 3000 psf. Provided the recommendations of this report are followed, settlements should be within permissible magnitudes with the indicated foundation system. Foundations are to be located a minimum of 24 inches below the exterior adjacent grade. The local jurisdiction may require greater embedment depth. FOUNDATION EXCAVATION After the foundation crawlspace, trench, or entire building pad has been excavated to design grade it is recommended that a geotechnical engineer or his representative inspect all foundation -bearing and fill supporting surfaces to confirm that conditions are similar to those documented within this report and used for design. Inspection should verify that the native subgrade to support concrete foundations or structural fill is firm, stable and free of wet or deflecting areas. if clay soils are present at the bearing elevation they are to be removed or confirmed to be non -expansive. Imported structural fill is to be used to backfill any over excavation. If foundations are to be founded on compacted structural fill, the depth, stability and proper compaction of the fill is also to be confirmed by the inspecting geotechnical engineer. Bob J. Arnold, PE 8717 Graydon Drive Boise, Idaho 83704 b J. ArnoI _r, civil Engineering (� Geotechnical Engineering Materials Testing & inspection Services 208-440-6276 * Fax 208-323-7866 * biarnoldpe(c. msn.com December 14, 2010 Page 9 of 20 110926001.doe Historical aerial photos indicate that the irrigation ditch that goes around the corn field just north of McMillan Road previously crossed the field. Building structures were also previously present on the north west and south west corner of McMillan and Ten Mile Roads. Care is to be taken when constructing atop fill placed by current or former property owner in the former irrigation ditch. It is recommended that this area be inspected at the time of construction to confirm the ditch was property grubbed and backfilled when the ditch was rerouted. Any former foundations or basement are to be similarly examined. Any historical concrete (foundations, slabs, ditch liner, vaults, etc) encountered during earth work operations are to be removed and backfilled with structural fill. STRUCTURAL FILL Structural fill shall be an imported granular material with 109 percent passing a six-inch sieve and less than seven percent passing a f#200 sieve. Fill is to be free from organic matter or other deleterious substances and all fines shall be non -plastic. If used within the pavement section, imported fill should have an R -Value not less than 50. Structural fill should be placed in uniform lifts; moisture conditioned as necessary and compacted to a minimum of 95% of the maximum dry density as determined by ASTM Test Method D698, "Standard Proctor" with appropriate rock correction. Compaction of structural fills Is to be verified by density testing and construction observations. A qualified engineer or his representative should monitor fill placement to ensure the work is performed in accordance with these recommendations. Testing should be performed in accordance with ASTM Test Methods D3017-89 and D2922=91, (nuclear densometer). The inspector must also confirm that the foundation supporting soils and any additional structural fill is free of soft, deflecting, excessively wet areas and expansive clay soils. if encountered, such areas are to be removed and replaced with imported, structural fill. Soils stockpiled on the south west corner of McMillan and Ten Mile Roads can be used as fill provided it is free of organics and does not contain clay soil. Bob J. Arnold, PE 6717 Graydon Drive Bolse, Idaho 03704 Bob J. Arnold, 1� CEngineering Geotechniccalal Engineering Materials Testing & Inspection Services 200-440-6278 * Fax 208-323-7866 * biarnoldpe@msn.com 2010 _ Page 10 of 20 FOUNDATION AND UTILITY EXCAVATIONS No difficulties are anticipated with excavation for foundations and shallow utilities. As stated earlier in this report, groundwater was encountered as shallow as 2.0 feet below the exiting surface, therefore dewatering will be required for construction activities below this depth. It is unknown how much groundwater changes during the irrigation season but a higher groundwater elevation should be anticipated when irrigation ditches are full. Shallow excavations that do not exceed three feet in depth may be constructed with side slopes approaching vertical. Below this depth, it is recommended that slopes not exceed a vertical to horizontal ratio of one to one. Severe sloughing of excavation walls that extend below the hardpan layer can be anticipated. This information is provided for planning purposes. It is our opinion that maintaining safe working conditions is the responsibility of the contactor. Jobsite conditions such as soil moisture content, weather condition, earth movements and equipment type and operation can all affect slope or bank stability. All excavations should be sloped, braced or shored as required by local, state, and federal requirements. SEISMIC STETTING Soils on this site classify as Site Class D. Structures to be constructed onsite should be designed as per the IBC requirements for such a seismic classification. Care must be taken so that all excavations below slab on grade concrete are properly backfilled in accordance with the structural fill recommendations outlined herein. This is very critical where a slab will extend over utility trenches or retaining wall backfill. Trenches and wall backfill areas are to be filled in lifts and benched each lift so that fill is not placed against a vertical soil face greater than three feet tall. Testing is to confirm that compaction has been achieved. Areas of excessive yielding should be excavated and backfilled with structural fill. Bob J. Arnold, PE 8717 Craydon arlve Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 * 1 of 20 Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services rnoldpe@msn.com 110925001.c1oc Interior slab on grade concrete and slabs designed to support vehicles should be placed atop a minimum of four inches of granular base material. The mat should consist of sand or sand - gravel mixture with non -plastic fines. The material should all pass a 3/4 inch sieve and should contain less than seven percent passing the # 200 sieve. The mat shall be compacted to the requirement for structural fill. All slabs should be suitably reinforced to make them as rigid as possible. Proper joints should be provided at the junctions of the slab and foundation system so that independent movement can occur without causing damage. FLEXIBLE P"EMiENT SECTION Based upon the observed conditions and intended use of the property, the following pavement sections are recommended. Pavement Layer Residential Collector Asphaltic Concrete ZVI 30" Base Coarse %" minus 4.0" 40" Sub base Pitrun 14.0" 118.0" The above pavement section is based upon the presence of clay soils in the west end of the property. These soils can be anticipated to have an R -Value result of less than R=5. If construction is to occur in stages or phases it may be cost effective to sample the subgrade of each phase for R -value testing. Higher R -value results will allow for a reduction in pavement section thickness. The subgrade below all future pavements is to be inspected for soft or deflecting areas prior to the placement of the pavement section. If structural fill is used to fill the site then a reduction in recommended pavement sections is also possible. In this case, this engineer should be contacted after subgrade elevation is established and exposed for re -inspection. Materials meeting the requirements of ISPWC are required for any work within this project. This engineer encourages the recycling of materials that can be harvested during construction. Recycled asphaltic pavement and Portland cement concrete are also acceptable for use as sub base material. Bob J. Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 STORMWATER DISPOSAL Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services The client has indicated that surface retention ponds are planned for disposal of storm water. The percolation rate through the cemented silt and hardpan layer will be extremely slow. A percolation rate of P=9.0 inches/hour is recommended. If a drainage trench is extended through hardpan layer to the free draining pitrun materials, then the percolation rate will be limited to P = 8.0 inches per hours or the value for sand or pitrun used to backfill the excavated trench. After the plans and specifications are more complete, it is recommended that this consultant be provided the opportunity to review the final design and specifications. This review will confirm that the earthwork and foundation recommendations have been properly interpreted and implemented. At that time, it may be necessary to submit supplementary recommendations. Monitoring and testing should also be performed to verify suitability of materials used for structural fills and to confirm subgrade stability and proper placement and compaction. Any revision in the plans for the proposed structure from those described in this report or deviations from the noted subsurface conditions should be brought to the attention of this consultant. This report has been prepared for the exclusive use of the identified client and their retained design consultants. Findings and recommendations within this report are for specific application to the proposed building described here and apply only to the property identified. Bob J. ,Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 n is 11 � • •; r Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services :1 208-323-7866 13 Test Pit Locations Map 1 Groundwater Depths Test Pit Logs Sail Log Legend Abbreviations & Acronyms .doe Bob J. Arnold, PE 8717 Graydon Drive Boise, Idaho 83704 i. • f Arnold, Civil Engineering Geotechnical Engineering Materials Tesfing & inspection Services 208-440.6276 * Fax 208-323-7866 Page 14 of 20 Test Pit locations Map Groundwater Depth Below Surface Location TPI TP2 TP3 TP4 TP5 TP6 TP7 TP8 EP- EP- EP- West North 11- 9-06 D 05 Depth 2.0' 3.9' 6.3' 6.8' 6.0' 60' 2.7' No 4.6' 6.3' 3.6' 4.0' 3.5' 10116111 Well Bob J. Arnold, PE 8717 C�aydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 14, 2010 Page 15 Test Pili Log Civil Engineering Geotechnical Engineering Materials Testing & inspection Services moldoeOmsn.com Test Pit #: TP -1 File: Client: Highmark Consultant Compan +, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43°39'11.41 "N 116027'7.99"W Logged By: 1'10925001 September 29, 2071 Superior 1 Backhoe Bob Arnold ' Ms Test Pit #: TP -2 File: Client: Highmark Consultant Company, LLD pate Excavated: Project: Volterra Subdivision Excavator: Location: 43039'9.00"N 116026'53.59"Vit Logged By: 110926001 September 29, 2011 Superior J Backhoe Bob Arnold Sample ## # tt # DEPTH SOILS DESCRIPTION Type 4 10 40 200 M PI LL 0.0-2.0 IMPORTED FILL Field Access Road 2.0.4.6 Black, wet; Sticky, CLAY (CL) Bag 100 100 97 86.9 27,3 21.0 45.6 with sand and clay 2.6 4.5 Gravel Contact Water inflow at gravel layer 4.5.10.0 Pitrun-Sand and Gravel Bag 97 89 60 9.6 10.4 NP NP Very dirty at upper limit 6.0 10.0 Bottom of Excavation 10.0 Sloughing prevented Deeper excavation GROUNDWATER FILLED TEST PIT TO 24" BELOW SURFACE ' Ms Test Pit #: TP -2 File: Client: Highmark Consultant Company, LLD pate Excavated: Project: Volterra Subdivision Excavator: Location: 43039'9.00"N 116026'53.59"Vit Logged By: 110926001 September 29, 2011 Superior J Backhoe Bob Arnold Bob J. Arnold, PE -8717 Craydon Drive Boise, Idaho 83704 Sample # # # # DEPTH SOILS DESCRIPTION Type 4 10 40 200 M PI LL 0.0-2.0 IMPORTED FILL- Field Access Road 2.0-6.0 Brown, Wet, Cemented SILT Bag 100 98 76 49.8 29.9 NP NP with sand and clay 20 6.0 Gravel Contact Water in flow In gravel 6,D-10.0 Pitrun -Sand and Gravel Vary dirty at upper limit Free draining at 8.5' 10.0 Bottom of Excavation Sloughing prevented Deeper excavation GROUNDWATER AT 48" Bob J. Arnold, PE -8717 Craydon Drive Boise, Idaho 83704 208-440-6276 * Fax 208-323-7866 * 16 Test pit Log Civil Engineering Geotechnical Engineering Materials Testing & inspection Services [moldoeBmsn.com Test Pit #; TP -3 File: Client: Highmark Consults Company, LLC Date Excavated. Project; Volterra Subdivision Excavator: Location: 43039'7.88"N 116026'37.21"W Logged By: 110925001 September 29, 2011 Superior/ Backhoe_ Bob Arnold r ee J Test Pit M. TP -4 Filer Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43039'19.72"N 116026'37.40"W Logged By: 110926001 September 29, 2011 Superior I Backhoe Bob Arnold Sample # # # # DEPTH SOILS DESCRIPTION Type 4 10 44 200 M PI LL 0.0-3.0 Red - Brown, Wet, SILT With Clay & Sand 3.0.6.0 tight Brown - Tan; Wet, Bag 100 100 80 29.2 20.6 NP NP 2.0.0.0 Cemented SILT 3.0 96 87 79 71.9 26.6 NP NP with sand 6.6 100 89 40 26.3 11.6 NP NP 6.0 Gravel Contact 8.0.10.0 Water in Flow at Gravels 6.0-11.6 Pitrtm —Sand and Gravel Very dirty at upper limit 10.0-12.0 Free draining at 8.01 11.6 Bottom of Excavation 12.0 Sloughing prevented Deeper excavation GROUNDWATER AT 76" r ee J Test Pit M. TP -4 Filer Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43039'19.72"N 116026'37.40"W Logged By: 110926001 September 29, 2011 Superior I Backhoe Bob Arnold Bob J. Arnold, PE 8717 Craydon Drive Bolse, Idaho 83104 Sample # # # DEPTH SOILS DESCRIPTION Type 4 10 40 200 M PI LL 0.0-2.0 Light Brown, Wet, SILT With sand and clay Cultivated to 18-20" 2.0.0.0 Brown, Wet; Cemented SILT Bag 96 87 79 71.9 26.6 NP NP with sand and clay Cementing increases w/ depth 8.0.10.0 HARDPAN, cemented silt layer 10.0 Gravel Contact,- Cemented Water inflow In Gravel 10.0-12.0 Pltrun -- Sand and Gravel Very dirty at upper limit 12.0 Bottom of Excavation Sloughing prevented Deeper. excavation GROUNDWATER AT 81" GROUNDWATER AT 62" In old piezometer nearby Bob J. Arnold, PE 8717 Craydon Drive Bolse, Idaho 83104 �i w i ti �:a � • 208440-.6276 * Fax 208-3237866 * 4, 2010 Page Test Pit Log Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services Test Pit M TP -5 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location, 43039'7.98"N 116026'19.36"W Logged By: 1 110926001 September 29, 2011 Superior ( Backhoe Bob Arnold Test Pit M TP -6 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43039'12.97"N 116026'2.56"W Logged By: 110926001 September 29, 2011 Superior/ Backhoe Bob Arnold Sample # # # # DEPTH SOILS DESCRIPTION Type 4 10 40 200 M PI LL 0.0-2.0 Light Brown, Wet, SILT With sand and clay Cultivated to 18-20" 2A-5.0 Brown, Wet, Cemented SILT Bag 96 81 66 66.3 21.2 6.0 30.66 Increasing to 3.0 6.0 HARDPAN at 4.-S.0 6.0 Gravel Contact 5.0-11.0 Pitrun — Sand and Gravel Free draining at 6.5' 11.0 Bottom of Excavation Toughing prevented Deeper excavation GROUNDWATER AT 80" Test Pit M TP -6 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43039'12.97"N 116026'2.56"W Logged By: 110926001 September 29, 2011 Superior/ Backhoe Bob Arnold Bob J. Arnold, PE 8717 Craydon [give Boise, Idaho 83704 Sample # # # DEPTH SAILS DESCRIPTION T © 4 14 40 200 M PI L L 0.0-2.0 Light Brown, Wet, SILT With sand and clay Cultivated to 18.20" 2.0.6.0 Brown, Wet, Cemented SILT Bag 96 81 66 66.3 21.2 6.0 30.66 (ML) 3.0 6.0 Gravel Contact 6.0.10.0 Pitrun W Sand and Gravel Very dirty at upper limit Free draining at 8.0' 10.0 Bottom of Excavation Sloughing prevented Deeper excavation GROUNDWATER AT 72" Bob J. Arnold, PE 8717 Craydon [give Boise, Idaho 83704 208-440.6276 * Fax 208-323-7866 Page 1 Test Pit Log Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services Test Pit #: TP -7 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra Subdivision Excavator: Location: 43039'9.00"N 116026'53:69"W Logged By: .doc 110925001 September 29, 2011 Superior i Backhoe Bob Arnold Test Pit #: TP -8 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra _Subdivision Excavator: Location: 43039'9.00"N 116026'53.59"W Logged By: 110926001 September 29, 2011 Superior/ Backhoe Bob Arnold Sample # # # # DEPTH SOILS DESCRIPTION TXpe 4 10 40 240 M PI LL 0.0-3.0 Tan, Moist, SILT Bucket 100 99 89 83.9 6.9 5.0 27.9 With Sand 3.0 Rootxone to 61' 3.0 Gravel Contact 3.0.7.0 Pitrun —Sand and Gravel Free draining at 4.0' Water inflow at Gravel contact 7.0 Bottom of Excavation Severe Sloughing prevented Deeper excavation GROUNDWATER AT 32" Test Pit #: TP -8 File: Client: Highmark Consultant Company, LLC Date Excavated: Project: Volterra _Subdivision Excavator: Location: 43039'9.00"N 116026'53.59"W Logged By: 110926001 September 29, 2011 Superior/ Backhoe Bob Arnold Bob J. Arnold, PE 8717 Craydon Drive Bolse, Idaho 83704 Sample # # # # DEPTH SOILS DESCRIPTION Tyee 4 10 40 200 M Pi LL 0.0-3.0 Tan; Moist, SILT Bucket 100 99 89 83.9 6.9 5.0 27.9 With Sand (ML) 3.0 Gravel Contact 3.0.8.0 Pitrun — Sand and Gravel Very dirty at tipper limit Free draining at 8.6' Water inflow in gravels ±6' 8.0 Bottom of Excavation Severe Sloughing prevented Deeper excavation Bob J. Arnold, PE 8717 Craydon Drive Bolse, Idaho 83704 208-448-6276 * Fax 208-323-7888 * amber 14, 019 SOIL LOG LEGEND Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM STANDARD TEST_METHOD D 2487 FOR CLASSIFICATION OF SOIL FOR ENGINEERING PURPOSES Xa MAJOR DIVISIONS it 1= TY ICAL DESCRIPTIONS COARSE GRAINED SOILS < 60% - #200 GRAVEL & GRAVELLY SOILS <60% - #14 < 6% - #200 GW W411 -graded gravel, gravel -sand mixture, little or no fines. GP Poorly -graded gravel, gravel sand mixture, little or no fines 6-12% 4200 > 12n/o - #200 GM Silty ravel, g ravel -sand -silt mixtures GC Clayey ' ravel,gravel-sand-clay mixtures SAND & SANDY SOILS >60%-#4 <'6% - #200 SW Well -graded sand, gravelly sand, little or no fines. SP Poori - raded sand, gravelly sand, little or no fines >12% - #200 SM Siltysand, sand -slit mixtures SC Cl ay ey sand sand -clay mixtures FINE GRAINED SOILS 50% - #200 SILTS AND CLAYS LL < 60% 11 SILTS AND CLAYS LL L60% INORGANIC ML Inorganic slit and very fine sand, rock flour, silty or clayey fine sand or clayey silt with slight plasticity CL Leanclay-loci to medium plasticity, gravelly clay, sandy clay, silty clay ORGANIC ] INORGANIC 0L MH 11 organic silt and organic sl& clu of low oasticlty Elastic silt, micaceous or diatomaceous fine sand or silty soil. 11 CH Fat cla - hi hplasticity rORGANIC OH Organic clay-med. or hi h elasticity: organic slit HIGHLY ORGANIC SOILS 11 PT 11 Peat, humus, swamp soil with high organic content 1 Bob J. Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services 208-440-6276 * Fax 208-323-7866 * 20 Abbreviations and Acronyms AASHTO American Association of State Highway & Transportation Officials ACP Asphaltic Concrete Pavement ASTM American Society for Testing and Materials BH Bore Hale International Building Code IBC ISPWC Idaho Standard for Public Works Construction 1TD Idaho Transportation Department NP Non Plastic PGC Portland Cement Concrete PCF Pounds per Cubic Foot TP Test Pit USCS Unified Soil Classification System CL. Clay NOTHING FOLLOWS Bob J. Arnold, PE 8717 Craydon Drive Boise, Idaho 83704 Mr. Justin Blackstock Cottonwood Development, LLC 2228 West Piazza Street Meridian, Idaho 83646 Justin: Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services �jarnoldpe@msn.com Re: Geotechnical Research Bridge Tower Estates North Side of McMillan Road Meridian, Idaho 130616003.doc Page 1 of 3 As per your request, on October 7, 8, & 10, 2013 we performed percolation testing on the roadway subgrade soil at the referenced project. Two perc tests were performed in general accordance with ACRD requirements. SE test was southeast of N. Abruzzo Avenue & W. Riva Capri Street intersection. NW test was north of N. Bolsena Way and W. Wapoot Street intersection. Locations are indicted on the attached drawing. Each test consisted of boring a 12' diameter 2.5 to 3.0 foot deep boring to the depth of the proposed adjacent roadway subgrade elevation. R. P. Jones Drilling of Boise, Idaho provided the Texoma auger rig and operator. An 8 inch, solid, pile was then installed and seated with the drill rig. The space out side the pipe was then backfilled with native soils. Water was then poured into the pipe on each of the days listed. On the final day the pipes were filled in the morning. In the afternoon, a hand auger was used to remove some of the accumulated fine grain soils in the bottom of the test pipe. Water was again placed in each pipe and the drop in water level and time periods were recorded until consistent results were obtained. Depth and time readings were recorded for approximately two hours. Percolation rate is calculated by dividing change in water level by time period. Based upon a safety factor of two, we recommerid a percolation rate of P 3/ inch/hour. Actual field measurements are reported in the Appendix. On October 7, 2013 an R -Value sample was delivered to Material Testing & Inspection of Boise, Idaho. The sample was gathered from the intersection of Apgar Creek Street and Abuzzo Avenue, in the SW corner of the project. Results indicate that an R -Value of R=5 is appropriate for design. The MTI laboratory -report is attached. This opportunity to be of service is appreciated. Should you have any questions or require additional information, please contact our office at your convenience, Bob J. Project cc: Munger /Wilson Bob J Arnold,PE 14366 Battenberg Drive Boise, Idaho 83713 Bob J. Arnold, PE 208.440-6276 PERCOLATION MEASUREMENTS NW SE interval Interval Min. Time Min. Hours 1.50 4:22 0:28 0.47 5:35 4:52 0:30 0.50 0:30 5:22 0:30 0,50 0.25 5:62 0:30 0.50 NW Interval Interval Time Min. Hours 4:37 '1.3 1.50 6:05 0:28 0.47 5:35 0:30 0.50 6:05 0:30 0.50 6:20 0:15 0.25 SITE MAP Civil Engineering Geotechnical Engineering Materials. Testing & Inspection Services bjarnoldpe@msn.com Page 2 of 3 Measure P Inches Inches/Hour 0.0 0.63 '1.3 1.50 1.8 2.25 '1.5 A VERA GE 1.5 Depth P- Feet Inches/Hour 0.0 '.00 2.1 2.00 2.0 2.88 1.s 3.35 2.0 AVERAGE 2.0 Ilk - ® e v o Pyr ,+ I E n WOW A, CM P. Vai I' is0 � t 7r 1 .. � 'xtx ntnate0 ti'y { I j ; SE. Avc Vast _ s Bob J Arnold, PE 14366 Battenberg Drive Boise, Idaho 83713 7 Bob Arnold, rM 208-440-6276 Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services biarnaldveAnsn.com vember 4, 2013 130616003'doc Page 3 of 3 R -VALUE by !Materials Test qq & Inspection PACs: t2 or 2 MATERIALS rextra�sc,a trilC,i 1D>6:YS0 i.•CeD I A!Ci^rxlmz+ilsE^D TESTING 'Er i2 -VALUE u arvusle sra.aam INSPECTION t Envlrr;nrnr.nldt Sers cs 0 Gr oteci(nicai Ffigmeann,t 0 Special ?ns;;ectlans R -Value rest Data Snw•cc and Ua5cri tion: Saat pled and Ucli@cred h • thv Caicnt - Cixv ____-- WtoObtahtetic August 30,30t3 Sample !1); 13-706Snm lin and Preparation; ASThI i)75: :'1rlASTM D421: AA511'1'07237: X R -Value (n) 200 psi Exudation Pressure = Less than 5** tP AS rM D2844 Note 2: OccaMolnally, material from very pinsuc clay -test. specimen: will extrude from wider the mold mid around the lollower ram during the loading operation. if this occurs when the 800 -psi point is reached and fewer than rive lights are lighted. tho soil should he reposed a> toss than 5R -value. (2 -Value Q Exudation Pressure 5.0 CO a 3.0 'm 2,0 i.0 0.0 300 250 200 150 100 Exudation Pressure (psi) y2791 S. Victory View Woy, Eloise IQ 83709 .208 370.4748 • Fox 208 322.0575 yt^.jn1 (;_:d Ain • C�h mG•id. m t Sample- Dr ' Density (lbYil) A NA NA_ :`ill ,lioishtrc: Contin) NA NA Nel Expansion Pressure (psi) NA SH'fq T3: E�udatiw 12 -Value NA "fest Standard: A51'AtD2R4-f: AASNTOT190; TdahaTi+: X Sample- Dr ' Density (lbYil) A NA NA_ :`ill ,lioishtrc: Contin) NA NA Nel Expansion Pressure (psi) NA +� E�udatiw 12 -Value NA NA NA ;VA Bab J Arnold, PE 14355 Battenberg Drive Boise, Idaho 83713 Civil Engineering Bob V. Arnold! G Geotechnical Engineering Materials Testing & inspection Services 208-440-6276 Mr. Justin Blackstock Cottonwood Development 2228 West Piazza Street Meridian, Idaho 83646 Justin: December 18, 2013 130304002.doc Page 1 of 2 Re: 2nd Addendum to Geotechnical Report Proposed Volterra Subdivision McMillan & Ten Mile Roads Meridian, Idaho As per your request, on December 18, 2013 this engineer supervised the excavation and logged an additional test pit near the proposed Bridgetower Height's San Vito Crossing. This test pit was located approximately 60 feet south of the canal and 50 feet east of the San Vito centerline, just south of McMillan Road. The pit was very similar to the western test pit excavated approximately 700 feet to the east in March of this year. A Test Pit Log was generated and is attached. Based upon observed conditions, the recommendations of the original report addendum (#130304001) dated March 4, 2013 are appropriate for this box culvert crossing. This opportunity to be of service is appreciated. Should you have any questions or require additional information, please contact our office at your convenience. Respectfully submitted; Bob J Project Geotechnical Consultant Bob J Arnold, PE 14365 Battenber0 Drive Boise, Idaho 83713 208-440.6276 Test Pit Log Civil Engineering Geotechnical Engineering Materials Testing & Inspection Services r Page 2 of 2 Test Pit #: San Vito Crossing TP File: 130304002 Client: Cottonwood Development Date Excavated: December 19, 2013 Project: Bridgetower Heights Excavator: Superior J Backhoe ..... •.n4 � 1 nnnnti Mr. Rnh Arnnid Bob J Arnold, PE 14365 Battenberg Drive Boise, Idaho 83713 Sample # # _- # DEPTH SOILS DESCRIPTION Type 4 10 40 200 M P! LL 0.0-2.0 Black to Dark ; Brown, Moist, Organic, Silty, Clay. Corn field roots to 0.6' (10.12" of Frost was present When test pit was excavated 2.0.4;0 Light Brawn, Moist to Wet, Sandy SILT 4.0-6.6 Brown, Moist to Wet, Cemented SILT Hardpan layer at bottom ±1.' 6.6 Gravel Contact Weakly cemented and silty For upper 0.6-1.0' 7.0-10.0 Pitrun type sand and gravel 10.0 Bottom of Excavation No Groundwater Encountered Bob J Arnold, PE 14365 Battenberg Drive Boise, Idaho 83713 Munger Engineering Inc. August 28, 2013 4090 W State Street #29 Boise; ID 83703 Re: Permeable Pavement in Bridgetower Heights Subdivision - This submission constitutes the structural design of the proposed permeable pavement to be constructed in Phase 1 of the Bridgetower Heights Subdivision. Background Information Geotechnical testing was conducted at the site by Bob Arnold; PE, with the results being reported in a letter dated June 24, 2013. According to Mr. Arnold"an R -value of R=5 is appropriate for design". The grain size analysis for the native soil was provided on Page 3 - the native soil "sample contained 65% clays and silts that pass a #200 sieve", You advised that the recommended Traffic Index for the site, according to ADA County, was 6 (equals approximately 33,140 ESALs); however, we selected to use a more conservative TI of 6.5 in the design (equals approximately 65,583 ESALs). Analysis Methodoiogy The Design (required) Structural Number was determined using the Interlocking Concrete Pavement Institutes (ICPI) "PICP Permeable Design Pro Software, Version 1.1.0,216" using the TI and R -value data outlined above. The Pavement (provided) Structural Number was calculated following the methodology in ASCE 58-10: Structural Design of Interlocking Concrete Pavement for Municipal Streets and Roadways. Please note that the structural (layer) coefficients for the respective pavement layers are reported in the attached summary. Analysis Results The Design Structural Number for the site was calculated by the software to be 2.44. A pavement cross section consisting of an 3.125" (80mm) thick paver, 2" bedding layer of #8 stone, 4" base layer of #57 stone, and 10" subbase layer of #2 stone provided a Pavement Structural Number of 2.46, which was structurally adequate I hope this summary is sufficient for your needs. Regards, Glenn Herold, P.Eng. National Commercial Hardscape Engineer Oldcastle Architectural o G.J. m 90420209 � w V foo01V -n 0 0 -n N 0 0 (Dm <0) JOL 0 M 3 0.) 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Z: - 6; C: —M -0 3 (D (D (D 3 r+ 0 w cr w (D 0 W 0- 3 3 =7 3 W P 0 rD :3 — 3 0 I-V r+ C) 0 C: --s l 0 0 W < C o r+ L" < CD " r+ L/) > (D Ln 0- 0 Z rD(D > (D r— vi 0*0 3 Z c Z -1 (D L02 It w rD 0 Vi- (D --I � - - 3 FD r r, 0, r) (D (D 0 5' U p (D U r+ CDG) 0 I1 -0 (D C) 2 a E 5, NJ (D 1,1 —= , N C:) G) '"I I bo 0 CL CL (D 0) rD :3 :E 0CL M, 0 in ., CL Eil (D 0 9 M n I m (D Ln C:) > Ln V) CL (D 0 EDj 0 L (D 0 (A (D = NC-- ' - �. 3 w — C) U.) U-) (D (D V) (a � 0 *0 M r ci co o a- wc (D En rL < G (D (-n 0 rD OA (D D p O 0 (OD O o 0' Op (D' Jane Suggs From: Mindy Wallace <Mwallace@achdidaho.org> Sent: Monday, May 08, 2017 3:39 PM To: Jane Suggs Subject: RE: Summerwood Preliminary Plat at Vicenza/Bridgetower Hi Jane, A traffic impact study is not required for this application. Please let me know if you have any other questions. Mindy Mindy Wallace, AICP Planner III Ada County Highway District 208-387-6178 From: Jane Suggs [mailto:jSuggs@whpacific.com] Sent: Monday, May 08, 2017 3:36 PM To: Mindy Wallace Subject: Summerwood Preliminary Plat at Vicenza/Bridgetower H! Mindy, Hope you are enjoying this nice Spring weather. I sure am! I am working on a preliminary plat application for 26 buildable lots in Meridian. I've attached two maps showing the location and our layout so far. The preliminary plat application asks for a written confirmation that a traffic study is not needed. Can you provide that confirmation? Call me if you have questions. Thanks, Jane PS: I understand a similar plat with 30 buildable lots was approved previously, but has since expired. Jane Suggs I Planner WHPacific, Inc. 1 2141 W Airport Way, Ste 104, Boise, ID 83705 Direct 208.275.8729 1 Mobile 208.602.6941 1 Fax 208.342.5353 1 jsuggs@yLhpacific.com Enhancing Client Satisfaction through Creative, Exceptional Service NMSDC Certified MBEICPLIC Certified MBE NMI ii NMI c El AVX f"", L.- Ix \1 N AVX f"", L.-