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HomeMy WebLinkAboutIII. Pike Lake Trail &It CITY COUNCIL WORKSHOP STAFF AGENDA REPORT PREPARED BY: SUBJECT: GREG ILKKA, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER CONSIDER CHANGE ORDER TO CONTRACT FOR CONSTRUCTION OF PIKE LAKE TRAIL. OCTOBER 13,1997 DATE: INTRODUCTION: The purpose of this agenda item is to consider a proposed change order to the Pike Lake Trail construction contract to eliminate a retaining wall and guard rail. BACKGROUND: Plans and specifications were prepared for the construction of Pike Lake Trail and bids were opened on August 4, 1997. A retaining wall on the west side of Pike Lake Trail was required to be designed to support the roadway. To fill the area would have required significant additional right of way. DISCUSSION: Subsequently, Herb Wensmann, owner of both parcels on the west side of Pike Lake Trail has unofficially approached the City with plans to develop one site on the southerly most part of the property and requests an access directly to Pike Lake Trail for this site. The engineering staff met with Wensmann and his engineer on Friday, October 10th to discuss this concept. He can pursue building on this site with a building permit. Further development of the parcel will require platting. Pike Lake Trail is a Minor Collector. The request for an access at the proposed location is consistent with a Minor Collector. Due to the topography of the site an access at the requested location requires significant fill. If fill is placed, the need for a retaining wall to support Pike Lake Trail is eliminated, The need for guard rail is eliminated as well. There would be extra cost involved with the grading. Also, the unit price for the remaining retaining wall on the contract would be justifiably increased to reflect the decrease in quantity and the engineering costs involved with the wall. The contract calls for 6,000 S,F. (square feet) of modular block retaining wall. The unit price bid was $14.30/S.F. for a total contract cost of $85,800, It is proposed to eliminate approximately 5,800 S.F. for a deduction of $82,940. It is also proposed to eliminate 570 L.F. (lineal feet) of guard rail at $13.00 per L.F. for a deduction of $7,410. At the time of this writing we have not completed estimating the additional quantity of fill so we can not put a cost on this yet. We will have a better 16200r~ Creek Ave. S.E., Prior Lake, Minnesota 55372-1714 / Ph. (612) 447-4230 / Fax (612) 447-4245 AN EQUAL OPPORTUNITY EMPLOYER handle on change in contract cost on Monday afternoon, October 13th after the contractor, McNamara Contracting, has had a chance to review and react to the proposed changes, It is staff's position that the extra costs will be less than the deduct of the retaining wall and guard rail. The contractor, has verbally indicated he feels that is true as well. ISSUES: Because the contractor is in the middle of construction of Pike Lake Trail, approval of this change is time sensitive. We will have estimated figures for change in contract cost for council consideration at the workshop. In accordance with the City purchase policy on contract changes this workshop item is included to keep the Council apprised of the situation before any changes are performed, Upon consensus with this change staff would direct the contractor to go foward with the changes as not to delay the contract and a formal Change Order will be prepared for Council consideration at a later regular City Council meeting. ACTION REQUIRED: 1, Provide staff with direction on this issue. REVIEWED BY PLTCO.DOC PIKE LAKE TRAIL - DELETION OF RETAINING WALL SUMMARY OF ESTIMATED CHANGE IN CONTRACT COST Deduct: 6,000 S.F. Retaining Wall @ $14.30 ISF = $85,800 570 L.F. Guardrail @ $13.00 IL.F. = $ 7,410 Total Deduct = $93,210 Additions: Retaining Wall Sub-Contractor Costs Incurred (Engineering, Mob, Freight): = $ 4,250 New Unit Price for Remaining Wall 130 S.F. @ $23 ISF = $ 2,990 Utility Sub-Contractor Re-mobilization Watermain modifications = $ 1,000 = $ 1,000 = $ 5,800 Prime Contractor mark-up on wall Additional Work at Contract Prices Common Excavation: 1,000 C.Y. @ $3.50 ICY. = $ 3,500 Silt Fence: 600 L.F. @ $2.75 I L.F. = $ 1,650 Total Additions= $20,190 NET ESTIMATED CHANGE IN CONTRACT COST = - $73,020 ISSUES: 1. Although this is a major change to the contract, it has a net effect of significantly reducing the contract cost. Does the Council wish to proceed with this change? 2. Due to the timing of this change, the contractor would need to proceed with the changes immediately. If the Council agrees with the change, a formal change order would be prepared for Council approval at a regular Council meeting. However, the Contractor would proceed with the work immediately.