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Home My WebLink About2010 12 13 Consent 200 Increase Construction Contingency On Wal-Rose, Inc. Contract For Soloary Canal Regional Stormwater Treatment Area COMMISSION AGENDA CONSENT X INFORMATIONAL ITEM 200 PUBLIC HEARING REGULAR December 13, 2010 MGR /DEPT / '/Vi- Meeting Authorization REQUEST: Public Works Department requesting authorization to increase the construction contingency on the City's contract with Wal -Rose, Inc. for the Solary Canal Regional Stormwater Treatment Area from 10% to 16 %. SYNOPSIS: The Solary Canal Regional Stormwater Treatment Area is approximately 65% complete at this time. Unforeseen groundwater conditions have required changes to the project's scope and schedule that will likely require an increase in the approved construction contingency. The project construction cost including the construction contingency is funded by the St. John's River Water Management District. CONSIDERATIONS: • The Solary Canal Regional Stormwater Treatment Area is located on a 28.9 -acre property at 1900 DeLeon Street in the northeast corner of the City of Winter Springs (see Exhibit A). The Solary Canal project is a planned partnership between the St. Johns River Water Management District (SJRWMD), Seminole County, the City of Oviedo, and the City of Winter Springs. SJRWMD is funding the entire cost of construction (up tp $1.7 million), and the three local agencies (Winter Springs, Oviedo, and Seminole County) are planning to equally share in the annual operation and maintenance costs for the project. • Authorization to award the construction contract to Wal -Rose, Inc. was approved by the City Commission at the January 11, 2010 Commission meeting (ITB #010- 09 -BF) in the amount of $1,465,739.80 plus a 10% contingency, for a total authorization of $1,612,313.78. This agenda items is requesting an increase in the contingency from 10% to 16 %, which will bring the total authorization up to $1,700,000. • Construction started on April 19, 2010 and is approximately 65% complete at this time. On July 12, 2010, an artesian groundwater discharge was encountered during excavation of the wetland area. Several additional artesian discharges were encountered during the week of July 12. On approximately July 19, 2010, the contractor was directed to suspend deep excavation due to the potential for encountering additional artesian discharges. Additional geotechnical investigations were performed by Ardaman & Associates, Inc. during the first week of August 2010. Ardaman's investigation indicated the deeper areas of the pond and December 13, 2010 Agenda Item #200 Page 2 of 3 wetland area, which have yet to be excavated, could be vulnerable to failure due to hydrostatic uplift pressures more closely related to the upper Floridan aquifer. SJRWMD's design engineer, CH2M Hill, has prepared a design modification that shallows the pond and wetland areas by several feet to minimize the risk of failure. Shallowing the pond and wetland areas will reduce the treatment efficiency of the project but with the re- design it still provides at least 90% of the original phosphorous removal rate. All excavation work was temporarily suspended on September 14, 2010 to allow the required design modifications to be completed and for the applicable permits to be updated. • SJRWMD and the City are currently in negotiations with the contractor, Wal -Rose, Inc., regarding the cost to perform the remaining excavation work. Wal -Rose has claimed that the remaining material to be excavated is unsuitable due to a high clay content, and this material must be hauled off and disposed offsite at a landfill. In addition, the design modification includes a procedure for plugging the two artesian discharges ( "boils ") encountered within the wetland area. It is expected that the additional costs for these items and related work in the modified design drawings will exceed the approved 10% contingency. Staff is requesting the contingency be raised to 16 %, which will bring the City's total construction authorization up to $1,700,000, matching the total amount available from SJRWMD. The project funding to date is summarized in the table below. Construction Funding: Wal -Rose Base Construction Cost $1,465,739.80 Approved Change Orders to Date $100,196.64 Total Construction: $1,565,936.44 Design Funding: Design Services (CH2M Hill) S24,800.00 Water Quality Testing 54,835.60 Total Design: $29,635.60 Total Amount Authorized to Date (Construction + Design): $1,595,572.04 Total Project Funding Available from SJRWMD: $1,700,000.00 Total Contingency Funding Available: $104,427.96 FISCAL IMPACT: The project construction is funded 100% by the St. Johns River Water Management District. In accordance with the terms of the construction funding agreement, the City invoices the District monthly during the construction period and the District reimburses the City within 45 days of receipt of an approved invoice. The District has paid all invoices submitted to date on time. December 13, 2010 Agenda Item #200 Page 3 of 3 COMMUNICATION EFFORTS: This Agenda Item has been forwarded to the Mayor and City Commission; City Manager; City Attorney /Staff; placed in Press Packets; placed in the City Hall (Lobby) City Commission Meeting binder; and is available on the City's Website, LaserFiche, and the City's Server. Additionally, information related to this Agenda Item has been sent to media/press representatives who have requested Agendas /Agenda Item information, all Homeowner's Associations on file with the City, all individuals who have requested Agendas /Agenda Item information, Department Directors; and also posted outside City Hall; posted inside City Hall with additional copies available for the general public; and posted at five (5) different locations around the City. Furthermore, the following has also been completed to further communicate the information in this Agenda Item: 1) At the start of construction, Staff mailed construction notices to all surrounding residents which included project information and contact information. 2) A project information sign at the project entrance off of DeLeon Street has been in place since the start of the project. RECOMMENDATION: Staff recommends that the City Commission authorize an increase the construction contingency on the City's contract with Wal -Rose, Inc. for the Solary Canal Regional Stormwater Treatment Area from 10% to 16% and authorize the City Manager and City Attorney to prepare and execute any and all applicable documents. ATTACHMENTS: 1. Exhibit A - Site Location EXHIBIT A SOLARY CANAL PROJECT LOCATION MAP i 1 Project Site ,n„ 101 1010 . 1 lone e0] 1740 w Mb 140 __ 3111 _ 1514 , _ 1461 Am lnlw , t , 410 ' _1567 Ste 11614 -.�, I 117/ = 1 :7 ;, ln7t 117N - 15f1 7JJ 17J 1 - • 110 WI 1 » 1 _ I — 1 J/ J G -114 v ' 1177 1171 _ J70 777 107 101 3 X 1 1 1441 lie 1560 203 4 511 \ 1464 1401 1167 _ . 1161 /011 701 /rob 140 I!!/ 15!6 y /571 1711 1370 x N/! 1477 1471 _ _ t 4 � 476 71 466 _ 61 167 0 - -_ 1151 ' 1110_ 'p - - 1470 1441 14 >i 1401 lab 1441 1517 _1710 175 471 437 170 /471 1464_ 1465 1541 l,1 _ ___ FLORIDA AV ._- 4 � la/ 1MI1 ' 1160 Ifl/ _ 1 1 16 _� - -_ Fl ORIDA AV 1 iaJ Nv i 1171 r , tl ilj , I 4417 144, IJe] I „ = 1 155 �:. = n 414 41 298 h4 1N1 0 n. it ,��' l77� k.1427 1171 RD 634 /A/161R4 Ro AM W STATE RD 4 34 s)A IF Nnau 0 170 340 680 1,020 1,360 4.�2 1 1 Feet w . - .F h