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MHY a 'yu kio-j:Li'd Li 1 I. MJF �Hur"L v Lc� <br /> Mr. R. Charles Ahl • <br />• April 9, 1990 <br /> Page 2 <br /> a <br /> Various alternative bridge types and materials could be considered for the Rice <br /> Creek crossing. The alternatives range from custom constructed concrete and/or . • <br /> wood structures to prefabricated steel and wood structures. A number of com- <br /> panies currently manufacture steel and wood prefabricated bridge structures <br /> which are ideally suited for a project of this type. A prefabricated bridge <br /> would be the most economical and easily constructed structural crossing, and it <br /> would be adequate for the pedestrian and maintenance vehicle loadings proposed. <br /> The bridge would be delivered to the project site complete for installation onto <br /> concrete abutments. In the event County Road I bridge improvements are per- <br /> formed in the future, and it is decided to incorporate the pathway into the <br /> roadway bridge design, the prefabricated bridge could be easily removed and <br /> salvaged for reinstallation at another .location. <br /> As per the subsurface exploration program report prepared by Twin City Testing <br /> Corporation, it is recommended that a timber pile foundation be used to support <br /> the bridge structure. Two piles will be provided for each abutment to provide <br /> adequate foundation support. The piles will be driven to an approximate depth <br /> of 50-foot below existing grade. <br /> For the purposes of this report, it has been assumed that a prefabricated steel <br /> and wood bridge structure would be used for the pathway crossing of Rice Creek. • <br /> The bridge is proposed to be eight feet wide, with a span of 75 feet. <br /> Information is attached to this report detailing one of the types of prefabri- <br /> cated bridge available. <br /> The proposed pathway and bridge improvements are shown in attached Exhibit #1. <br /> ESTIMATED COSTS <br /> The estimated project costs for the pathway and bridge construction are pre- <br /> sented below. Please note that a 35 percent allowance has been included in <br /> determining the total . project cost to allow for indirect costs such as engi- <br /> neering, administration, legal and contingency items. <br /> Item Unit <br /> Number Item Qua.__.nti Price Extension . <br /> 1 Bituminous Pathway 3,250 SY $ 8.50 $27,625.00 <br /> ' 8' Wide <br /> 2 Prefabricated Steel Truss 1 EA 20,000.00 20,000.00 <br /> Pedestrian Bridge (Complete) <br /> Subtotal $47,625.00 <br /> 35% Indirect & Contingency 16,670.00 <br /> Total Project Cost $64,300.00 • <br />