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ENGINEERING/ENVIRONMENTAL AND COST ANALYSIS: <br />I-5 WILLAMETTE RIVER CROSSING/GLENWOOD FACILITY PLAN PHASE II <br />TABLE 3 <br />Order-of-Magnitude Estimates <br />Category Concept Name Comments <br />Order-of- <br />Magnitude <br />Estimate <br />(million $) <br />1Full Interchange: $80-$120 Concepts with more road over water (and therefore <br />Diamond 1more bridge structures) would be more expensive. <br />Impacts to high voltage transmission lines and other <br />Full Interchange: <br />undefined utilities would drive costs toward higher <br />Diamond 2 <br />end of range. <br />Full Interchange: <br />Partial Cloverleaf <br />2$75-$85 <br />Partial Interchange: Partial Diamond has more road over water, so would <br />Partial Diamond likely be the higher cost concept compared to the <br />Partial Cloverleaf, assuming utility impacts are <br />Partial Interchange: <br />similar. <br />Partial Cloverleaf <br />3$75-$110 <br />Split Interchange: Two The Split Interchange concept would fall in the lower <br />½ Diamonds end of this range. Adding connecting roads (for the <br />Connected Diamonds) would result in significant <br />Split Interchange: <br />impacts and would increase the cost. <br />Connected Diamonds <br />4Glenwood Interchange $35-$50 There are major costs associated with this concept <br />Diamond to address the topographical constraints. Limiting <br />the scope of improvements by closing the existing <br />OR 99 ramps at Franklin would result in costs at the <br />lower end of the range. Keeping the OR 99 ramps <br />would require more costly structures to reconstruct <br />and braid the ramps. <br />Data Gaps <br />ß­ ­¬¿¬»¼ °®»ª·±«­´§ô ¬¸» ´·³·¬¿¬·±²­ ±º ¬¸·­ °®»´·³·²¿®§ ½±²½»°¬ó´»ª»´ »¨»®½·­» ¿®» <br />­·¹²·º·½¿²¬ò ß½½»­­ ¬± ¼»¬¿·´»¼ ­«®ª»§ ³¿°°·²¹ ¬¸¿¬ °®±ª·¼»­ ¿½½«®¿¬» ½±²¬±«® ¼¿¬¿ ¿²¼ <br />·²º±®³¿¬·±² ±² ¬¸» ¾«·´¬ »²ª·®±²³»²¬ ø®±¿¼­ô ¾«·´¼·²¹­ô ©¿´´­ô ®¿·´®±¿¼­ô «¬·´·¬·»­÷ ¿²¼ ¬¸» <br />²¿¬«®¿´ »²ª·®±²³»²¬ ø©¿¬»®©¿§­ô ©»¬´¿²¼­ô ±¬¸»® ®»­±«®½» ¿®»¿­÷ ©±«´¼ ®»ª»¿´ ³±®» <br />·²º±®³¿¬·±² ¿¾±«¬ °±¬»²¬·¿´ ½±²­¬®¿·²¬­ô ·³°¿½¬­ ¿²¼ ½±­¬­ ¬¸¿¬ ·­ ²±¬ °±­­·¾´» ¬± ¿­­»­­ ¿¬ <br />¬¸·­ ¬·³»ò ײ ¿¼¼·¬·±²ô º«®¬¸»® ­¬«¼§ ·­ ²»»¼»¼ ¬± ¼»¬»®³·²» ¸±© º«¬«®» ©·¼»²·²¹ ±º ×óë ¿¬ <br />¬¸» É·´´¿³»¬¬» 窻® ¬± »·¹¸¬ ´¿²»­ ¿²¼ ¿­­±½·¿¬»¼ ×óë ³¿·²´·²» ·³°®±ª»³»²¬­ ©±«´¼ <br />º«²½¬·±² ©·¬¸ ¬¸» ·²¬»®½¸¿²¹» ½±²½»°¬­ ¿²¼ »¨·­¬·²¹ ·²¬»®½¸¿²¹»­ ²±®¬¸ ¿²¼ ­±«¬¸ ±º ¬¸» <br />´·³·¬­ ±º ¬¸·­ ­¬«¼§ò ß ²»¨¬ ­¬»° ¬± ¾»¹·² ¬± ®»­±´ª» ¬¸»­» ·­­«»­ ©±«´¼ ¾» ¿ ®»º·²»³»²¬ °´¿² <br />­«ºº·½·»²¬ ¬± ¼»ª»´±° ¿² ·²¬»®½¸¿²¹» ½±²½»°¬ ø±® ½±²½»°¬­÷ ¬± ¬¸» °±·²¬ ¬¸¿¬ ¿ ­°»½·º·½ °®±¶»½¬ <br />½±«´¼ ¾» ·²½´«¼»¼ ·² ´±½¿´ ¿²¼ ®»¹·±²¿´ ¬®¿²­°±®¬¿¬·±² ­§­¬»³ °´¿²­ò <br />PDX\052200014 9 <br />