Loading...
HomeMy WebLinkAbout1999-124 CONT Chg Orders 14-15 - Carollo EngineersCITY OF ASHLAND C ITY HALL ASHLAND. OREGON 97520 October 5, 1999 Mr. Jaime lsaza Department of Environmental Quality l 102 Lincoln Street, Suite 210 Eugene, OR 97401 Re.' ASHLAND WASTEWATER TREATMENT PLANT UPGRADES CWSRF LOAN #R11750 - CHANGE ORDER SUMMARY Dear Jaime, There have been many changes on the subject project. I believe you have copies of all of the changes, except the last two. Attached are copies of those last two change orders; 14 and 15, and a quick summary of all changes. Please contact me at (541) 552-2411 if you have any questions with the attached information. Sincerely, Paula C. Brown, PE Public Works Director / City Engineer ~bara Christensen, City Recorder Jill Turner, Finance Director Jon Gasik, DEQ - Medford Attachments: ASHLAND WASTEWATER TREATMENT PLANT UPGRADES CWSRF LOAN #R11750 - Change Orders to Date: Number amount date l $23,527.00 2/4/99 2 $47,500.00 2/4/99 3 $33,744.00 3/8/99 4 $14,997.00 3/8/99 5 $I 1,170.00 4/19/99 6 $19,868.00 4/19/99 7 $7,114.00 5/25/99 8 $41,978.00 6/1/99 9 $48,920.00 6/7/99 10 $30,858.00 8/17/99 11 $40,445.00 8/17/99 12 $79,128.00 8/17/99 13 $1,136,000.00 8/16/99 14 $248,285.00 9/9/99 15 $21,773.00 9/9/99 to date $1,805,307.00 description misc including grinder pump relocate sewer trunk line overexcavation for RAS/WAS mics u/v building mods add embankment fill RAS/WAS 12KV duct bank freezeless hydrants/deduct cl monorail Influent Junction Box Rock Excavation/Gyp Rock UV Bldg clarifier V-notch weirs; misc changes paint secondary clarifiers; misc piping New Raw Sewage Force Main New Ashland Creek Pump Station Interim Sludge Fac; Lime Silo & Scrubber Eff Pipeline, Pressure Relief Valve, etc CAROLLO ENGINEERS, P.C. CONTRACT CHANGE ORDER NO. 14 Project No. 4411 B30 OWNER: City of Ashland, Oregon PROJECT: Wastewater Treatment Plant Process Improvements SRF # 11750 CONTRACTOR: Slayden Construction, Inc. ENGINEER: Carollo Engineers, P.C. The following changes, additions to or deletions from the work described in the Contract Documents are hereby authorized: Item No. 1 2 Description (See attachment) RFP-118 Purchase Lime Silo for Interim Sludge Facilities RFP~I 19 Purchase Scrubber System for Interim Sludge Facilities Cost Time (dollars) (days) 140,875.00 -0- 107,410.00 -0- Original Contract Amount Net Change by Previous Change Orders Contract Amount prior to this Change Order Net Change due to this Change Order New Contract Amount $12,374,000.00 1,535,249.00 13,909,249.00 248,285.00 $14,157,533.00 The Contract Time is (unchanged) (~n,',~,-~,'~ (oe¢,ce',,-,~} by -0- calender days. The Contract completion date will be January 14, 2001. The amounts indicated above shall be compensation in full for the work described and shall include all costs, direct and indirect, including extended overhead. Recommended by: (Engineer) Approved by: ~(~ity) Date: Date: CONTRACT CHANGE ORDER NO. 14 City of Ashland WWTP Process Improvements SRF # 11750 Description of Items in Change Order RFP-118 Purchase Lime Silo for Interim Sludge Facilities. By letter of August 23, 1999, RFP- 112 was established for the proposed interim sludge facilities for the wastewater treatment plant. These facilities must be "on-line" by approximately January 1, 2000 to handle sludge from the new secondary treatment facilities, as the biosolids disposal project has been delayed. To expedite construction of the interim sludge facilities, it is necessary to purchase certain pieces of equipment at once. By letter of September 1, 1999, the Engineer explained this situation and supplied a specification for the lime silo system. In a letter dated September 8, the Contractor submitted proposed costs of $140,875.00 for this equipment. After review, the Engineer informed the Contractor by letter of September 8, 1999 that this amount would be included in a forthcoming change order. RFP-119 Purchase Scrubber System for Interim Sludge Facilities. By letter of August 23, 1999, RFP~I 12 was established for the proposed interim sludge facilities for the wastewater treatment plant. These facilities must be "on-line" by approximately January 1, 2000 to handle sludge from the new secondary treatment facilities, as the biosolids disposal project has been delayed. To expedite construction of the interim sludge facilities, it is necessary to purchase certain pieces of equipment at once. By letter of September 1, 1999, the Engineer explained this situation and supplied a specification for the scrubber system. In a letter dated September 8, the Contractor submitted proposed costs of $107,410.00 for this equipment. After review, the Engineer informed the Contractor by letter of September 9, 1999 that this amount would be included in a forthcoming change order. CAROLLO ENGINEERS, P.C. CONTRACT CHANGE ORDER NO. 15 Project No. 4411B30 OWNER: City of Ashland, Oregon PROJECT: Wastewater Treatment Plant Process Improvements SRF # 11750 CONTRACTOR: Slayden Construction, Inc. ENGINEER: Carollo Engineers, P.C. The following changes, additions to or deletions from the work described in the Contract Documents are hereby authorized: Item No. 1 2 3 4 5 6 7 8 9 Description (See attachment) RFP-16 Lower Grade of 6-inch & 8-inch Drain Line RFP-47 Headworks Grit and Screenings Area Revisions RFP-59 RASNVAS Pump Station Window Sills RFP-74 Headworks Grit Chamber Area Slab Elevation Revisions RFP-75 Revise Monorail System Capacity RFP-102 Temporary Final Effluent Pipeline RFP-106 Modify Upper Portion of Stairs at Northeast Portion of Oxidation Ditch RFP-113 Hydrostatic Pressure Relief Valves for Oxidation Ditch Structure RFP-117 Delete Headworks Ramp Cost (dollars) -0- 3,360.00 2,199.00 -0- (3,183.00) 11,603.00 1,143.00 6,651.00 -0- Original Contract Amount Net Change by Previous Change Orders Contract Amount prior to this Change Order Net Change due to this Change Order New Contract Amount $12,374,000.00 1,783,534.00 14,157,534.00 21,773.00 $14, 179,307.00 Time (days) -0- -0- -0- -0- -0- ' -0- -0- -0- -0- The Contract Time is (unchanged)(~-¢~,,,,~1) (~l,~.,,,~r.,~) by -0- calender days. The Contract completion date will be January 14, 2001. The amounts indicated above shall be compensation in full for the work described and shall include all costs, direct and indirect, including extended overhead. Accepted b~- Recommended by: Approved by: Date: <9cj-17- 9~ Date: CONTRACT CHANGE ORDER NO. 15 City of Ashland WWTP Process Improvements SRF # 11750 Description of Items in Change Order RFP-16 Lower Grade of 6-inch & 8-inch Drain Line. By letter of November 24, 1998, the engineer informed the Contractor that the 6-inch and 8-inch drain piping being installed from the UV/Contact Basin area to the Plant Drain Pump Station area needed to be installed at a lower grade to provide adequate slope for drainage from the UV area. In a letter dated January 22, the Contractor submitted proposed costs of $5,171.00 for this work, but this cost specifically excluded rock excavation. Subsequent to this, the entire question of rock excavation in pipe trenches throughout the site was addressed in RFP-79; the cost of such rock excavation was agreed to include what would have been the cost of normal installation. By letter of August 17, the Engineer stated that, since the deeper pipe trench was paid for under RFP-79 as rock excavation, this RFP would be included in a forthcoming change order as a "no-cost" change. RFP-47 Headworks Grit and Screenings Area Revisions. By letter of March 3, 1999, the engineer informed the Contractor of a number of revisions at the grit and screenings areas at the Headworks, to provide better drainage, improved cleanliness and ease of maintenance, and convenience of construction. In a letter dated April 5, 1999, the contractor submitted proposed costs of $4,643.00 for these changes. Following discussions, the Contractor submitted revised proposed costs of $3,360.00 for this work in an August 26, 1999 letter. After review, the Engineer informed the Contractor by letter of August 26 that these costs were acceptable and would be included in a forthcoming change order. RFP-59 RASNVAS Pump Station Window Sills. In RFI-60, details for the sills for the aluminum windows in the RASANAS Pump Station were supplied; they were not in the original Plans. By letter of March 23, 1999, after the supplier indicated that additional costs were involved, the Engineer established RFP-59. In a letter dated June 18, 1999, the Contractor submitted proposed costs of $2,199.00 for this work. After review, the Engineer informed the Contractor by letter of August 18, 1999 that the costs were acceptable and would be included in a forthcoming change order. RFP-74 Headworks Grit Chamber Area Slab Elevation Revisions. By letter of April 23, 1999, the Engineer informed the Contractor of revisions to slab finish grade elevations around the grit chamber, to match existing concrete elevations; this included slightly revised stair riser heights and ramp elevations. This scope was modified by subsequent letter of April 26, 1999. In a letter dated August 27, 1999, the Contractor submitted a proposed "no-cost" for these revisions. After review, the Engineer informed the Contractor by letter of August 30, 1999 that this would be included in a forthcoming change order as such. RFP-75 Revise Monorail System Cal3acity. By letter of April 23, 1999, the Engineer informed the Contractor of a reduction in the capacity of the monorail in the RAS/WAS Pump Station from eight tons to six tons. In a letter dated August 19, 1999, the Contractor submitted proposed credits of ($3,183.00) for this revision. After review, the Engineer informed the Contractor by letter of August 23, 1999 that this amount would be included in a forthcoming change order. 2 RFP-102 Temporary Final Effluent Pipeline. On July 15, 1999, when excavating for the northern extension of the effluent box on the west end of the UV/Re-Aeration Structure, a concrete thrust block on the existing pie was uncovered. This conflicted with necessary construction of the box extension; the Contractor believed this was a differing condition, and submitted proposed costs of $11,603.00 for a temporary 18-inch final effluent pipeline. Following discussions, the Engineer informed the Contractor by letter of July 16 that this was additional work, and proposed that the Contractor's submitted costs be used, if the temporary pipeline were sized at 24-inches. In a letter dated July 19, the Contractor agreed that a 24-inch temporary final effluent pipeline would be installed for that cost; by subsequent letter of July 19, the Engineer informed the Contractor that this amount would be included in a forthcoming change order. RFP-106 Modify Upper Portion of Stairs at Northeast Portion of Oxidation Ditch. By letter of July 27, 1999, the Engineer informed the Contractor of the need to modify the upper portion of the stairs on the east side of the Oxidation Ditch, as this run of concrete stairs crosses the transverse expansion joint in the structure. The top portion of the stairs should be connected to the upper platform and have an expansion joint with slide plate where this portion rests on the intermediate platform. In a letter dated August 11, 1999, the Contractor submitted proposed costs of $1,143.00 for this modification. After review, the Engineer informed the Contractor by letter of August 16, 1999 that this amount would be included in a forthcoming change order. RFP-113 Hydrostatic Pressure Relief Valves for Oxidation Ditch Structure. By letter of August 25, 1999, the Engineer noted movement in the slab of the anoxic zone in Oxidation Ditch No.1 (western basin) and seepage of water through the joint. The Contractor was informed that ground water hydrostatic pressure relief valves should be installed in each of the two basins, six relief valves in each basin's anoxic zone. In a letter dated August 27, the Contractor submitted proposed costs of $6,651.00 for this work. After review, the Engineer informed the Contractor by letter of September 9, 1999 that this amount would be included in a forthcoming change order. RFP-117 Delete Headworks Ramp. By letter of September 1, 1999, the Engineer informed the Contractor of a change in the location of the ramp on the east side of the Headworks. It was originally shown in the middle of the Headworks but, in previous discussions, it was to be moved to the south to avoid conflict with installation of electrical panels. The Engineer indicated that it should be moved further south, between the southernmost scrubber and the stairs being installed on the north side of the new influent junction box under RFP-50; this should be a "no-cost" change. In a subsequent letter dated September 8, the Engineer noted that locating the ramp there would result in a very steep ramp and would conflict with a freezeless yard hydrant. It was decided to delete the ramp and, in its place, construct a small retaining wall alongside the stairs as a "no-cost" change. The Engineer indicated that this would be included in a forthcoming change order as such.