Loading...
HomeMy WebLinkAbout8 District Pipeline Replacement 2004 Agenda Item # Memorandum To: Board of Directors From: Neil Kaufman Date: June 14, 2004 Subject: Change Order No. 1 for the District Pipeline Replacement-2004 Project 1. Why this matter is before the board: Approval from the Board of Directors is necessary to issue a Change Order to a constrcution contract. 2. History: The Board previously awarded the District Pipeline Replacement-2004 project to Herbert Suter Construction (HSC). 3. New information: Construction of the project began on May 10. I am requesting a Change Order to the Contract for issues covered under seven general items that will cover all of the outstanding issues encountered as of June 4, 2004. Item 1: The District applied for and received an Encroachment Permit from Caltrans for the Work on State Route 89. Caltrans does not change the District any fees associated with this permit. For some past contracts, Caltrans has required that the Contractor pay a fee associated with the Permit. Caltrans has not required this on all projects. On this project, Caltrans made a last minute addition to the Permit requiring, that the Contractor pay an Encroachment Permit fee. This change was made too late to be included in any Addendums and HSC was unaware of the requirement so the cost was not included in the Bid. The cost associated with this permit fee is $970.00. Item 2: Construction of the project began on west side of State Route where the new pipeline would connect to an existing 10-inch pipe. Upon excavating the existing 10- inch pipe, it was discovered that the 10-inch pipe was housed inside of a 24-inch steel casing. The only drawing in the District files that covers installation of this 10- inch pipe is hand drawn in pencil and does not have any mention of the casing. Upon discovery of the 24-inch casing, it was decided to cut the casing out of the way in order to access the 10-inch pipe. Cutting of the casing proceeded slowly since it was necessary to remove the casing without damaging the 10-inch steel pipe inside. This effort took almost an entire day. Installation of the tapping sleeve and performance of the hot tap was completed this first day. Page 1 During the second day, HSC was able to install pipe to the center of the roadway, backfill the trench and complete the paving work. The existence of this casing essentially caused a full day's delay for the project. HSC is due $8,529.96 associated with this delay. Item 3: On Day 3 of the project, HSC encountered an 8" underdrain located along the east edge of pavement for SR 89. This pipe is at a depth of about 48-inches to the top and is in a trench filled with gravel to the bottom of the pavement subgrade. The District was unaware of the existence of the underdrain. Local Caltrans maintenance personnel and the consultant who designed the traffic circle project were also unaware of the underdrain pipe. This underdrain pipe created a number of problems: 1) The underdrain pipe was at the same elevation as the water pipe. It was necessary to install two elbows in order to route the new water pipe under the underdrain. 2) The underdrain trench was five foot deep and full of gravel. It was very difficult to stabilize the trench walls and the excavation became unnecessarily large since the gravel would just slough into the excavated area. 3) The underdrain and gravel trench provided a pathway for groundwater to enter the trench excavation. While crossing SR 89, the trench was dry and the groundwater table was below the bottom of the trench. Once the underdrain was encountered, it was necessary to deal with unanticipated groundwater for another 100 feet of excavation. 4) The underdrain is located along the east edge of pavement. The delays and additional work associated with this problem required closure of the westbound 1-80 to SR 89 north ramp longer than anticipated. HSC is due $17,357.80 for delays and additional work associated with this underdrain. Item 4: On Richards Boulevard, SBC mismarked the location of an existing telephone duct bank. Once the markings were corrected, it was necessary to change the pipeline alignment. This required additional sawcutting at a cost of$690.00. Item 5: During construction of the pipelines on Richards Boulevard and the east shoulder of SR 89, significant amounts of rock were encountered. So much rock was encountered on Richards Boulevard that there was not enough screened material to use as backfill. Removal of this rock from the trench and off-haul of the rock for disposal falls into the Contract's rock excavation clause. HSC is due $45,545.49 for rock excavation. Item 6: The Contract Documents require the use of imported material for bedding around the water pipe. For the proportion of the trench between the pipe bedding and the bottom of the pavement subgrade, it is normally possible for the contractor to screen the excavated native material to remove large rocks and then place the material back into the trench as "intermediate backfill". Page 2 As noted in Item 5, it was necessary to import material for use as intermediate backfill on Richards Boulevard because there was so much rock. It was also necessary to import drain rock for use as pipe bedding on both SR 89 and Richards Boulevard due to the groundwater at both locations. HSC is due $3,819.25 for trucking and purchase of this additional material. Item 7: On Parsenn Road, a vertical conflict arose related to an existing sewer lateral and fire hydrant that are in close proximity. It was necessary to modify the existing fire hydrant to accommodate installation of the new water pipeline. HSC is due $442.22 for this additional work. 4. Recommendation: I recommend that the Board authorize Contract Change Order #1, in the amount of a $77,354.72 payment to Herbert Suter Construction from the District. Attachments: Change Order Form Page 3 �� M • M"— Change Order _A Contract Name: DISTRICT PIPELINE REPLACEMENT-2004 Contract Change Order No: 1 Orig. Contract Amt. $ 449,982.00 Days NA Date: June 14, 2004 Prev. Apprd Changes$ 0.00 Days NA Contractor: Herbert Suter Construction This Change$ 77,354.72 Days NA Revised Contract Amt. $ 527,336.72 Days NA This Change Order covers changes to the subject Contract as described herein. The Contractor shall construct, furnish equipment and materials, and perform all work as necessary or required to complete the Change Order Items for a lump sum price agreed upon between the Contractor and District. Increase in (Decrease) Contract Time Contract in Contract Extension Description of Changes Amount $ Amount $ (days) 1) Caltrans Encroachment Permit $970.00 NA 2) 24-inch Steel Casing on West Side of SR 89 $8,529.96 NA 3) Underdrain on East Side of SR 89 $17,357.80 NA 4) Additional Sawcutting on Richards $690.00 NA 5) Rock Excavation—SR 89 & Richards $45,545.49 NA 6) Additional Backfill Material & Drain Rock $3,819.25 NA 7) Fire Hydrant Modification $442.22 NA Totals $77,354.72 Net change in contract amount (increase or decrease) $77,354.72 The amount of the Contract will be increased by the sum of $77,354.72 and the Contract Time shall not be extended. The undersigned Contractor approves the foregoing Change Order as to the changes, if any, in the contract price specified for each item including any and all supervision costs and other miscellaneous costs relating to the change in work, and as to the extension of time allowed, if any, for completion of the entire work on account of said Change Order. The Contractor agrees to furnish all labor and materials and perform all other necessary work, inclusive of the directly or indirectly related to the approved time extension, required to complete the Change order items. This document will become a supplement of the contract and all provisions will apply hereto. It is understood that the Change Order shall be effective when approved by the District. Accepted: /Contractor Date: (Signature) Approved: /District Date: (Signature) Agenda Item # ' . ,, , �ublic Utility District �j Memorandum To: Board of Directors From: Neil Kaufman Date: June 11, 2004 Subject: Change Order No. 1 for the District Pipeline Replacement-2004 Project 1. Why this matter is before the board: Approval from the Board of Directors is necessary to issue a Change Order to a constrcution contract. 2. History: The Board previously awarded the District Pipeline Replacement-2004 project to Herbert Suter Construction (HSC). 3. New information: Construction of the project began on May 10. 1 am requesting a Change Order to the Contract for issues covered under seven general items that will cover all of the outstanding issues encountered as of June 4, 2004. Item 1: The District applied for and received an Encroachment Permit from Caltrans for the Work on State Route 89. Caltrans does not change the District any fees associated with this permit. For some past contracts, Caltrans has required that the Contractor pay a fee associated with the Permit. Caltrans has not required this on all projects. On this project, Caltrans made a last minute addition to the Permit requiring, that the Contractor pay an Encroachment Permit fee. This change was made too late to be included in any Addendums and HSC was unaware of the requirement so the cost was not included in the Bid. The cost associated with this permit fee is$970.00. Item 2: Construction of the project began on west side of State Route where the new pipeline would connect to an existing 10-inch pipe. Upon excavating the existing 10- inch pipe, it was discovered that the 10-inch pipe was housed inside of a 24-inch steel casing. The only drawing in the District files that covers installation of this 10- inch pipe is hand drawn in pencil and does not have any mention of the casing. Upon discovery of the 24-inch casing, it was decided to cut the casing out of the way in order to access the 10-inch pipe. Cutting of the casing proceeded slowly since it was necessary to remove the casing without damaging the 10-inch steel pipe inside. This effort took almost an entire day. Installation of the tapping sleeve and performance of the hot tap was completed this first day. Pagel During the second day, HSC was able to install pipe to the center of the roadway, backfill the trench and complete the paving work. The existence of this casing essentially caused a full day's delay for the project. HSC is due $8,529.96 associated with this delay. Item 3: On Day 3 of the project, HSC encountered an 8" underdrain located along the east edge of pavement for SR 89. This pipe is at a depth of about 48-inches to the top and is in a trench filled with gravel to the bottom of the pavement subgrade. The District was unaware of the existence of the underdrain. Local Caltrans maintenance personnel and the consultant who designed the traffic circle project were also unaware of the underdrain pipe. This underdrain pipe created a number of problems: 1) The underdrain pipe was at the same elevation as the water pipe. It was necessary to install two elbows in order to route the new water pipe under the underdrain. 2) The underdrain trench was five foot deep and full of gravel. It was very difficult to stabilize the trench walls and the excavation became unnecessarily large since the gravel would just slough into the excavated area. 3) The underdrain and gravel trench provided a pathway for groundwater to enter the trench excavation. While crossing SR 89, the trench was dry and the groundwater table was below the bottom of the trench. Once the underdrain was encountered, it was necessary to deal with unanticipated groundwater for another 100 feet of excavation. 4) The underdrain is located along the east edge of pavement. The delays and additional work associated with this problem required closure of the westbound 1-80 to SR 89 north ramp longer than anticipated. HSC is due $17,357.80 for delays and additional work associated with this underdrain. Item 4: On Richards Boulevard, SBC mismarked the location of an existing telephone duct bank. Once the markings were corrected, it was necessary to change the pipeline alignment. This required additional sawcutting at a cost of$690.00. Item 5: During construction of the pipelines on Richards Boulevard and the east shoulder of SR 89, significant amounts of rock were encountered. So much rock was encountered on Richards Boulevard that there was not enough screened material to use as backfill. Removal of this rock from the trench and off-haul of the rock for disposal falls into the Contract's rock excavation clause. HSC is due $42,008.49 for rock excavation. Item 6: The Contract Documents require the use of imported material for bedding around the water pipe. For the proportion of the trench between the pipe bedding and the bottom of the pavement subgrade, it is normally possible for the contractor to screen the excavated native material to remove large rocks and then place the material back into the trench as "intermediate backfill". Page 2 r r As noted in Item 5, it was necessary to import material for use as intermediate backfill on Richards Boulevard because there was so much rock. It was also necessary to import drain rock for use as pipe bedding on both SR 89 and Richards Boulevard due to the groundwater at both locations. HSC is due $3,819.25 for trucking and purchase of this additional material. Item 7: On Parsenn Road, a vertical conflict arose related to an existing sewer lateral and fire hydrant that are in close proximity. It was necessary to modify the existing fire hydrant to accommodate installation of the new water pipeline. HSC is due $442.22 for this additional work. 4. Recommendation: I recommend that the Board authorize Contract Change Order #1, in the amount of a $73,817.72 payment to Herbert Suter Construction from the District. Attachments: Change Order Form Page 3 "- Change Order r Contract Name: DISTRICT PIPELINE REPLACEMENT -2004 s Contract Change Order No: 1 Orig. Contract Amt. $ 449,982 Days NA Date: June 11, 2004 Prev. Apprd Changes$ 0 Days NA Contractor: Herbert Suter Construction This Change$ Days NA Revised Contract Amt.$ Days NA Contract as described herein. The Contractor shall construct, This Change Order covers changes to the subject furnish Items for auipme su and m price agreed and upon dorm all lthe work as necessary d District. required to complete the Change Order Increase in (Decrease) Contract Time Contract in Contract Extension Description of Changes Amount $ Amount $ da s 00 NA970. 1) Caltrans Encroachment Permit $ NA 2) 24-inch Steel Casing on West Side of SR 89 $8,529.96 NA 3) Underdrain on East Side of SR 89 $17,357.80 4) Additional Sawcutting on Richards $690.00 NA 5) Rock Excavation—SR 89 & Richards $42,008.49 6) Additional Backfill Material & Drain Rock $3,819.25 7) Fire Hydrant Modification $442.22 $73,817.72 Totals Net change in contract amount (increase or decrease) $73,817.72 The amount of the Contract will be increased by the sum of $73,817.72 and the Contract Time shall not be extended. The undersigned Contractor approves the foregoing Change Order as to the changes, if any, in the contract price specified for each item including any and all supervision costs and other miscellaneous costs relating to the change in work, and as to the extension of time allowed, if any, for completion of the entire work on account of said Change Order. The Contractor agrees to furnish all labor and materials and perform all other necessary work, inclusive of the directly or indirectly related to the approved time extension, required to complete the Change order items. This document will become a supplement of the contract and all provisions will apply hereto. It is understood that the Change Order shall be effective when approved by the District. Accepted: /Contractor Date: (Signature) Approved: /District Date: (Signature)