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Home My WebLink AboutObservation of Helical Pier Installations 02.23.2017H-PKUMAR Geotechnical Engineering 1 Engineering Geology Materials Testing 1 Environmental 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa.com Office Locations: Parker, Glenwood Springs, and Summit County, Colorado February 23, 2017 Valenz Construction, LLC Attn: Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 (valenzcuc@ gmail.com) Subject: Gentlemen: Project No. 17-7-159 Observation of Helical Pier Installations, Proposed Residence, Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado As requested, a representative of H-P/Kumar observed the helical pier installations at the subject site between February 14 and 17, 2017 for suitability to support the building foundation. The findings of our observations are presented in this report. The observations were performed in accordance with our agreement for professional services with Valenz Construction, LLC dated February 6, 2017. Hepworth-Pawlak Geotechnical (now H-P/Kumar) previously conducted a subsoil study for design of foundations at the site and presented the findings in a report dated February 27, 2015, Job No. 115 055A. The foundation of the proposed residence was designed by Lindauer-Dunn to be supported on forty HP288 Foundation Support helical piers or equivalent. The pier location plan is shown on Figure 1. Our observations of the helical pier installations are presented in the attached Helical Pier Observation Reports. The piers appeared to have penetrated the alluvial fan deposits and achieved torque refusal in the underlying river gravel deposit. Based on the previous subsurface exploration and our current observations at the site, the installed piers appear adequate to support the design service loading capacity of 35 kips. The findings submitted in this letter are based on our observation of the pier installations, our experience in the area and the previous subsurface exploration at the site. Variations in the subsurface conditions below the helical piers could increase the risk of foundation movement. Our services do not include determining the presence, prevention or possibility of mold or other Valenz Construction, LLC February 23, 2017 Page 2 biological contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a professional in this special field of practice should be consulted. If you have any questions or need further assistance, please call our office. Sincerely, H -Pi KU MAR Steven L. Pawlak, P.E. SLP/lj f 155222 ,a If • 6y ■ Attachments: Figure 1- Location of Helical Piers Report of Helical Pier Observations, February 14, 15, 16 and 17, 2017 cc: Lindauer-Dunn — Jeff Dunn (jeff@ lindauerdunn.com) H-PkKUMAR Project No. 17-7-159 'Dural 41t.11ItI _r .j1 z ;!7r . .1f !I ?;YR r O Af g 4 S t • .r, • nX a •• -- A ' f J. 59 r�o Y 1-- - "M ua,",r Tei • +'�,� 35 ..f NEW RESIDENCE LOT 78 IRONBRIDGE SUBDIVISION GARFIELD COUNTY, COLORADO R. FICIAR CI IC AND 'CFI' A• VAI FN711FL A, .•.r , H-PI<UMAR Office Locations: Parker, Glenwood Report of Helical Pier Observation Client: Valenz Construction, LLC Project No.: 17-7-159 Attn: Edgar Cuc Sheet No.: 1 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project: Proposed Residence, Lot 78, Ironbridge, 1075 River Bend Way, 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumarusa.rom Springs, and Silverthome, Colorado Date: 2/14/17 of 1 Garfield County, Colorado General Contractor: Valenz Construction Pier Manufacturer: HP 288 Design Load (kips) Helical Rig Type: Pier Design Load Capacity (kips) Pier Contractor: Link Belt rotating head Pier Ultimate Load Capacity (kips) Foundation Western 160 Lx trackhoe Refusal Criteria 1500 psi Repair Colorado with hydraulic Measured Torque 1800 psi of Comments Pier # Pier Location Shaft Type Helix Diameter (in.) Total Depth (ft.) 1 See plan dia. double 17'3" 2 2% See plan dia. 8/10 double 17 8" 1500 psi 1800 psi 3 2% See plandia. 8/10 double 24' 1500 psi 1800 psi cobbles'at 4 See plan dia odouble 22' 1500 psi 1800 psi 5 2% See plan dia. 8/10cobbles double 23'6" 1500 psi 1800 psi at 11/:' & 5, 6 2% See plan dia. 8/10cobbles double 22' 6" 1500 psi 1800 psi at 5' & 10' Preliminary Observations and / or Testing Results Verbally Reported To: Notes: P = Refusal to penetration of pier. T = Refusal by torque limit. T = 8,218 T = 9,862 @ 1800 psi All helices'/ -inch in thickness. Torque measurements are based on pressure gauge readings recorded in field. T = Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe pier installation. H-P/Kumar did not provide pier @ 1500 psi. 9,862 @ 1800 psi. or helix sizing. n L. Pawlak, P.E. _ Reviewed Byf Copies: Valenz Construction—Edgar Cuc ivalenSrucTtamaII.corn] Llndauer•Dunn—Jeff Dunn (jeffR011ndauordunn.cam] Lou Eller / Robert Duran Steve Field Observer /ljf 1500 psi 1500 psi H-P� I<U MAR Client: Attn: Project: 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hnkulenwood[n kumarusa.corn Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Report of Helical Pier Observation Valenz Construction, LLC Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Proposed Residence, Project No.: 17-7-159 Date: 2/15/17 Sheet No,: 1 of 3 Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado Helical Pier Contractor: Foundation Repair of Western Colorado Link Belt 160 Lx trackhoe with hydraulic General Contractor Valenz Construction Pier Manufacturer: HP 288 Pier *12 13 Pier Location See plan See plan See plan See plan See plan See plan See plan Shaft Type 2% dia. 2% dia. 2% dia. 2% dia. 2% dia. 2',4 dia. 2% dia. 2% Helix Diameter (in.) 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8110 14 See plan dia, double 24' 6" Preliminary Observations and / or Testing Results Verbally Reported To: Notes P = Refusal to penetration of pier. T = Refusal by torque limit. ' Pier #9, 22' from design grade. #12, 25' from design grade. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field Design Loads were provided by Lindauer-Dunn Inc Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe _pier installation H-P/Kumar did not provide pier or helix sizing Copies Valenz Construction — Edgar Cuc (valenzcucRomall.corn) Lindauer-Dunn —Jeff Dunn ilsffitiPlindauerdunn.cornl Total Depth (ft.) 22' 2" 22' 20' 6" 22' 19' 24' 24' Design Load (kips) Rig Type: rotatin ! head Pier Ultimate Load Capacity (kips) Pier Design Load Capacity (kips) Refusal Criteria 1500 psi 1500 ps. 1500 psi 1500 psi 1500 psi 1500 psi Measured Torque 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi Comments Replaced on 2/16/17 if Lou Eller Field Observer Steven L. Pawlak, P.E. Reviewed By Pier Client. Attn: 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkgfenwood@kumarusa.com Office Locations: Parker, Glenwood Report of Helical Pier Observation Valenz Construction, LLC Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Springs, and Silverthorne, Colorado Project No.: 17-7-159 Date: 2115/17 Sheet No.: 2 of 3 Project: Proposed Residence, Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado General Contractor: Valenz Construction Pier Manufacturer: HP 288 Pier *15 16 17 Pier Location See plan See plan See plan *18 See plan 19 20 21 See plan See plan See plan Shaft Type 27/8 dia. 2% dia. 2% dia, 22 See plan 2% dia. 27/8 dia. 27 dia. 27 dia, 27% dia. Helix Diameter (in.) 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double Total Depth (ft.) 24' 6" Design Load Helical Pier Contractor: Foundation Repair of Western Colorado Rig Type: Link Belt 160 Lx trackhoe with hydraulic rotatlnq head 23' 6" 23' 6" 23' 6" 24' 23' 23' 23' Pier Design Load Capacity (kips) Pier Ultimate Load Capacity (kips) Refusal Criteria 1500 psi 1500 psi 1500 psi 1500 psi 1500 psi 1500 psi Measured Torque 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi Comments cobbles at 5' cobbles at 3' Preliminay Observations and / or Testing Results Verbally Reported To: Notes: P = Refusal to penetration of pier. T = Refusal by torque limit. " Pier#15, 25' 6" from design grade. Pier #18, 25' from design grade. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe pier installation. H-P/Kumar did not provide pier or helix sizing Copies: Valenz Construction -- Edgar Cuc lvalenzciic stinal I. corns J Lindauer-Dunn —Jeff Dunn IleffeblIndauerdunn.corn) /Ijf Lou Eller / Shane Mello Steven L. Pawlak, P.E. Field Observer Reviewed By 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkglenwood@kumanisa.Com Office Locations: Parker, Glenwood Springs, and Silverthome, Colorado Report of Helical Pier Observation Client: Valenz Construction, LLC Attn: Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project No.: 17-7-159 Date: 2/15117 Sheet No.: 3 of 3 Project' Proposed Residence, Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado General Contractor: Valenz Construction Pier Manufacturer: HP 288 Pier Pier # Location *23 See plan Shaft Type 2% dia. Helix Diameter (in.) 8/10 double Total Depth (ft.) Design Load (kips) 22' Helical Pier Contractor: Foundation Repair of Western Colorado Rig Type: Link Belt 160 Lx trackhoe with hydraulic notatin head Pier Design ] Pier Ultimate Load Load Refusal Measured Capacity Capacity Criteria Torque (kips) (kips) 1500 psi 1800 psi Comments Preliminary Observations and / or Testing Results Verbally Reported To Notes' P = Refusal to penetration of pier. T = Refusal by torque limit. " Pier #23, 24' from design grade. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field_ Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2.11 H-P/Kumar was requested to observe pier installation H-P/Kumar did not provide pier or helix sizing Copies: Valenz Construction - E=dgar Cuc tvileazqucbprnail.coJ Lindauer•Dunn -Jeff Dunn t1eff Qllndauerdunn.corn) nir Lou Eller / Shane Mello Steven L. Pawlak, P.E. Field Observer Reviewed By H -P KUMAP !id lr;rsa!°. 1, 5.1,+7i} I I:IlViinrirki-isl:d Client: Attn: 5020 County Road 154 Glenwood Springs, CO 81801 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: trpkglenwoodftumarusa.corn Office Locations: Parker, Glenwood Springs, and Silverthome, Colorado Report of Helical Pier Observation Valenz Construction, LLC Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project. Proposed Residence, Lot 78, Ironbridge, General Contractor: Valenz Construction Pier Manufacturer: HP 288 Project No.: 17-7-159 Date: 2/16/17 Sheet No.: 1 of 2 1075 River Bend Way, Garfield County, Colorado Helical Pier Contractor: Foundation Repair of Western Colorado Rig Type: Link Belt 160 Lx trackhoe with hydraulic rotatino head Pier # Pier Location Shaft Type Helix Diameter (in.) Total Depth (ft.) Design Load (kips) Pier Design Load Capacity (kips) Pier Ultimate Load Capacity (kips) Refusal Criteria 1500 psi Measured Torque 1800 psi Comments 24 See plan dia. double 21'9" 25 See plan dia. double 22'1500 psi 1800 psi *26 See plan p 2% dia. 8/10 double 21' 6" 1500 psi 1800 psi 27 See plan 2% dia, 8/10 double 21' 9" 1500 psi 1800 psi See plan 'cobbles dia. double 21'9" 1500 psi 1800 psi 22%,28 at *29 See plan dia. double 21 6" 1500 psi 1800 psi 30 See plan 2'/ dia, 8/10Spinning double 21'9 1500 psi P at 22', re -drilled 31 See plan dia. double 22 1500 psi 1800 psi reliminary Observations and / or Testing Results Verbally Reported To: Notes: P = Refusal to penetration of pier. T = Refusal by torque limit. * Pier #26, 23' from design grade. Pier #29, 22' 6" from design grade. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe pier installation. H-P/Kumar did not provide pier or helix sizing. Copies: Valenz Construction — Edgar Cuc (vaIunzcucaltpmall.com) Llndauer-Dunn — Jeff Dunn gaff@lindauerdunn.com) Lou Eller / Shane Mello Steven L. Pawlak, P.E. Field Observer Reviewed By Fl- P : I<LJ MAW -_...... _5020 County Road 954 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkolenwood(kumarusa.com Office Localions: Parker, Glenwood Springs, and Silverthorne, Colorado Report of Helical Pier Observation Client: Valenz Construction, LLC Project No.: 17-7-159 Date: 2/16/17 Attn: Edgar Cuc Sheet No.: 2 of 2 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project: Proposed Residence, Lot 78, Ironbridge, 1075 River Benxi Way, Garfield County, Colorado General Contractor: Valenz Construction Helical Pier Contractor. Foundation Repair of ;Western Colorado Link Belt 160 Lx trackhoe with hydraulic Pier Manufacturer: HP 288 Rig Type: rotating head Pier # Pier Location Shaft Type Helix Diameter (in.) Total Depth (ft.) Design Load (kips) Pier Design Load Capacity (kips) Pier Ultimate Load Capacity (kips) Refusal Criteria Measured Torque Comments 13 See plan 2% dia. 8110 double 24' 1500 psi 1800 psi Moved & re -drilled Preliminary Observations and 1 or Testing Results Verbally Reported To Notes: P = Refusal to penetration of pier. T = Refusal by torque limit. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field. Design Loads were provided by Lindauer-Dunn Inc Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe pier installation H-P/Kumar did not provide pier or helix sizing Copies: Valenz Construction — Edgar Cuc tvaleazeuctOgmail.cQmj Landauer -Dunn — Jeff Dunn (jefr'Ilndauurdunn,cpml Lou Eller / Shane Mello Steven L. Pawlak, P.E. Field Observer Reviewed By /ljf 1500 psi HPE KUMAR 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hpkgtenwaod@kumarusa.coin Office Locations: Parker, Glenwood Springs, and Silverthorne, Colorado Report of Helical Pier Observation Client: Valenz Construction, LLC Attn: Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project No.: 17-7-159 Date: 2117117 Sheet No.: 1 of 2 Project: Proposed Residence, Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado General Contractor: Valenz Construction Helical Pier Contractor: Foundation Repair of Western Colorado Pier Manufacturer: HP 288 Rig Type: Link Belt 160 Lx trackhoe with hydraulic rotatinu head Pier 32 33 34 35 36 37 38 Pier Location See plan See plan See plan See plan See plan See plan See plan Shaft Type 2% dia. 2% dia. 2% dia. 2% dia. 2% dia. 2'/e dia. 2% dia. Helix Diameter (in.) 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double 8/10 double Total Depth (ft.) 23' 22' 7" 23' 9" 22' 11" 22'7' 22' 2" 23' Design Load (kips) Pier Design Load Capacity (kips) Pier Ultimate Load Capacity (kips) Preliminary Observations and / or Testing Results Verbally Reported To: Refusal Criteria 1500 psi 1500 psi 1500 psi 1500 psi 1500 psi 1500 psi Measured Torque 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi 1800 psi Notes- P = Refusal to penetration of pier. T = Refusal by torque limit. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field. Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2.0. H-P/Kumar was requested to observe pier installation. H-P/Kumar did not provide pier or helix sizing. Copies: Valenz Construction — Edgar Cuc tralenzCUsCtilsimall.corn) Lindauer-Dunn —Jeff Dunn 0effftlndtauerdunrt.com) Robert Duran Field Observer Comments cobbles at 5' Steven L. Pawlak, P.E. Reviewed By Client: Attn: 5020 County Road 154 Glenwood Springs, CO 81601 Phone: (970) 945-7988 Fax: (970) 945-8454 Email: hokglenwood{Wkumarusa.com Office Locations: Parker, Glenwood Springs, and Sifverthorne, Colorado Report of Helical Pier Observation Valenz Construction, LLC Edgar Cuc 167 Silver Mountain Drive Glenwood Springs, Colorado 81601 Project:Proposed R General Contractor: Valenz Construction Project No.: 17-7-159 Date: 2117117 Sheet No.: 2 of 2 estdence, Lot 78, Ironbridge, 1075 River Bend Way, Garfield County, Colorado Helical Pier Contractor: Foundation Repair of Pier Manufacturer: HP 288 Western Colorado Rig Type: Link Belt 160 Lx trackhoe with hydraulic rotator head Pier # Pier Location Shaft Type Helix Diameter (in) Total Depth (ft.) Design Load (kips) Pier Design Load Capacity (kips) Pier Ultimate Load Capacity (kips) Refusal Criteria 1500 psi 1500 psi Measured Torque Comments 39 See plan 2r a dia. 8/10 double 22' 6" 1800 psi 1800 psi cobbles at g' 40 See plan dia. double 23 retiminary Observations and 1 or Testing Res ilts Verbally Reported To. Notes: P = Refusal to penetration of pier. T = Refusal by torque limit. All helices %-inch in thickness. Torque measurements are based on pressure gauge readings recorded in field. Design Loads were provided by Lindauer-Dunn Inc. Pier Design Load Capacity is based on the measured torque and a safety factor of 2 0. H-P/Kumar was requested to observe pier installation. H-P/Kumar did not provide pier or helix sizing Copies Valenz Construction — Edgar Cuc (valanzcuc mail.comy Landauer -Dunn —deft Dunn (ieff4ilndaugrdunn.com i Illf Robert Duran Steven L. Pawlak, P.E. Field Observer Reviewed By