Agenda - 09-04-2014 - 6a - Laserfiche WebLink

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34 1 allowed it to be placed back in the trench. This avoids having to haul the rock out by the 2 truckload for disposal and having to purchase and haul in select fill dirt to replace the rock that 3 was removed. 4 The County's engineering consultant, McGill Associates, is estimating that there could be an 5 additional 1,209 cubic yards of rock left to be excavated to finish this project. If the consultant's 6 estimate proves correct, the total rock excavated for this 12" sewer line would be 5,873 cubic 7 yards. When compared to the original estimate of 2,000 cubic yards, the difference is 3,873 8 cubic yards. 9 10 The rock excavation line item is paid at $120 per cubic yard of rock excavated, so adding an 11 additional rock excavation amount of 3,873 cubic yards will increase the construction costs by 12 $464,760. This estimate is based the best available data and is conservatively estimated to be 13 sufficient to cover all rock for the rest of this project. This project has a unit price contract so 14 that a contractor is paid per unit, in this case cubic yards, as the rock is excavated. The 15 contractor will only be paid for the amount of rock excavated, regardless of the amount 16 available in the budget for that particular line item. 17 18 The project is being funded by a State Revolving Fund (SRF) Loan. The current available loan 19 amount is $774,904. The original construction contract was for $597,813, and the engineering 20 design and construction oversight was $94,200, leaving $82,891 to cover ancillary costs and 21 contingency. To date, there have been change order requests from the contractor and other 22 ancillary costs against this contingency in the net amount of approximately $40,000, leaving 23 approximately $42,891 to go towards the extra rock excavation cost. 24 25 Additionally, $57,814 was appropriated to cover costs of the project which cannot be 26 reimbursed through loan proceeds, such as the loan origination fee and easement costs. This 27 amount will still be sufficient to cover the costs for which it was budgeted. 28 29 Commissioner Dorosin asked how likely it is for staff to anticipate these kinds of 30 obstacles. He asked if this is unavoidable in these kinds of projects, or if something should 31 have been done. 32 Kevin Lindley said the rock is there, and the cost of the rock is going to be the same 33 regardless of the estimate in the beginning. He said it is just a matter of the timing of the 34 budgeting. 35 Commissioner Dorosin said he is just wondering if there is a way to better anticipate 36 things for future projects. 37 Kevin Lindley said this particular project is short in length; however, it parallels a 38 stream, so they were required to dig about 20 feet down and this exponentially increased the 39 amount of materials. 40 Doug Chapman from McGill Associates said in a situation like this, where rock is 41 anticipated, the best thing would be to do borings before bidding the project. . 42 43 A motion was made by Commissioner McKee, seconded by Commissioner Pelissier for 44 the Board to: 45 1. Approve Budget Amendment#9-E adding $464,760 in rock contingency to the 46 McGowan Creek Outfall project construction contract and authorizing the request for an 47 additional $421,869 in SRF loan funding; and 48 2. Authorize the Manager to sign on behalf of the Board the change order for the additional 49 rock allowance and any documents related to the pursuit of additional SRF loan funding as 50 outlined in Item 1.