6.9. SR 06-18-2007 - Laserfiche WebLink

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SUMMARY OF PRELIMINARY EVALUATION ELK RIVER HIGHWAY 169 PRELIMINARY DESIGN AND ENVIRONMENTAL DOCUMENTATION June 4, 2007 o Safety concerns with the excessive amount of traffic that would use the frontage/backage roads. o Limited access and circulation to the northwest and northeast quadrants at Main Street. Alternative BC-l (2) was eliminated from consideration due to operational concerns and the fact that it failed to meet the future transportation needs ofthe area. . Alternative BC-2 - Main / School Street Collector-Distributor Road ConceDt: this alternative provides full access interchanges at both School and Main Streets. Other key characteristics of this alternative include: o Separates School and Main Street traffic (separate access points). o Maintains current frontagelbackage roadway system. o Balances volumes between Main Street and School Street. o Uses Collector-Distributor system for access to School and Main Street. o Less expensive construction costs (fewer/less expensive structures). o Provides good access to northeast and southwest quadrants at Main Street (connects to the current street system). o Limited commercial access to southeast quadrant at Main Street; access provides for right- in/right-out. o Commercial property impacts in the northwest and southeast quadrant of Main Street. o Potential commercial impacts in the northwest and southwest quadrants at School Street. o Potential residential impacts at School Street and east frontage road. o Good intersection spacing. o Good traffic circulation patterns. . Alternative BC- 3 - Main / School Street Braided Ramp Concept: this alternative also provides full access interchanges at both School and Main Streets. Other key characteristics ofthis alternative include: o Separates School and Main Street traffic (separate access points). o Maintains current frontagelbackage roadway system. o Balances volumes between Main Street and School Street. o Uses Braided Ramps (or bridged ramps) to facilitate access to School Street. o More expensive construction costs (two more bridges and a significantly larger Main Street Bridge to accommodate the Single-point interchange). o Complicated construction and Main Street profile issues. o Fewer direct commercial property impacts to the northwest and southeast quadrants at Main Street; but potential for additional property impacts due to ponding requirements. (2) Electronic, color copies of the layouts are available on the project website's "Maps" page: http://projects.dot.state.mn.us/srjl169elkriver/maps.html