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~DICICSON oommuniN Inharhuctur0 coneulMnls February 21, 2006 Mr. Steve Little, Director Cabarrus County Parks and Recreation Department 2323 Concord Lake Road Concord, North Carolina 28026.0707 Re: Change Order Request for North Cabarrus Park -Phase III Parking Lot Issues Cabarrus County, NC WKD M 405tx'1.01.CL Dear Steve: When the phase of this project was being planned, there was no sail testing preformed an tha site due to small area of construction. A site observation of the area did not indicate any issue of poor soil. The site was grassed with a hill that could be cut and used for fill of the parking facility extension. By do so this would scale a new flat playing area over looking the pond and in the center of the trail system. The preparations for the parking lot tbes8ing firml fromt Charlotte. Theaproblems that occurbed ingthe remialn nig 6C has of f iII become veryunusual. The discussion by the Contractor, Owner and Consultants are outlined below which will explain the problems and possible solution to complete the parking lot: The subsurface of the existing ground was proof rolled after the grass and waps observed by Steve Whaley of WK Dickson and Londa Strong ofeCabarrus Gounty Park and Rec. The proof roll showed that the land was stable and the amount of'pumping was minimal to a small area near the rear of the parking lot in a natural low area. WKD, Owner representative and Gary Lefler of Ike's discussed the condition and worked up a recommendation on site to use same fabric underlayment to be placed under the fill to bridge the small amount of pumping. This is a standard practice and rnmmonly used. The next step was to begin the flil process and Trigon was obtained to observe the fill placement. Trigon tested each lift of soil and found that the fill was very good soil with an optimum moisture content and a compaction of 95 to 9896 in each layer. The compaction rates follow standard light duty pavement sections requ(rements for compactton.of minimum of 9596 compaction to within the upper 12 inches and than 98 to 10096 was recommended by the spec(flcatfon of the bidding documents. The final Ikyer to get the parking lot to sub grade was to be compacted and tossed, buticoncretewas delivered fqr the curb Islands and the soil rutted severeiy. The truck almost got stuck. The soil had become very unstable almost over night: Trigon came out to visually review assess what could have 616 Colonnade Drive Charlotte, NC 28205 Tel: 704.34,5348 Fax 704.334.0078 www.wkdickson.com Nath Carolina • South Carolina • Georgia • Florida F-a~