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_-9.1/07/01 WED.J..1:32 FAX 612 296 7782 METRO MANAGERS OFFICE 141002 Mr. Dennis Welsh March 7, 2001 Page 2 The EA W included a detailed traffic study to examine the potential impacts of the proposed project's addition to smrounding area and the existing project. The construction of the Twin Lakes Parkway and upgrading of County Roads C and D were asswned in the traffic analysis to reduce congestion and to ensure a better traffic flow to and from the development. With this assumption, traffic assignments, future projections, and traffic volumes, as well as capacity calculations were based on the premised that the assumed roadway were completed and operating as functional facilities. The assumed improvements would need to be completed and open to traffic before a certificate of occupancy is issued by the city of Roseville. A traffic analysis was performed for each of the ten intersections using the traffic volumes forecasted for the three development concepts. All movements at all the five signalized intersections are expected to operate at level of service (LOS) D or better in the 2004 p.m. peak bour under the cmrently proposed development. With regards to the un-signalized intersections, only the North Centre Pointe Drive/Cleveland Avenue may warrant a traffic signal in the future to mitigate the poor, LOS. Others are expected to operate at an acceptable level. With the roadway improvements proposed, no significant negative traffic impacts are anticipated as a result ofthe proposed project's addition. A detailed air quality analysis assessing carbon monoxide (CO) impacts near roadway intersections that will be affected by the development was included in the EA W. Forecast traffic data were used to model predicted CO concentrations. The modeling was done using the most current versions oftbe Environmental Protection Agency's CO emissions model (MOBIL5a) and dispersion model (CAL3QHC). The analysis showed that with all the intersections analyzed in the study area, the projected one-hour and eight-hour maximum CO concentrations would remain below the state ambient CO standards for all the analysis years. Therefore, no significant air quality impacts are expected from the proposed projecfs addition. If you have any questions pertaining to air, traffic, or the ISPt please contact Innocent Eyoh at (651) 769-2591 Thank you again for the opportunity to review the EA W. Should you have any questions about this letter in general, please call me at (651) 296-8643. Sincerely, 4eI2~ Eric J. Kilberg Planner Principal Operations and Planning Section Metro District EJK.:gs cc: Mike Finndorf, Metro District, Community and Area Wide Section hmocent Eyoh, Policy and Planning Division, CommW1ity and Area Wide Section Don Perwien, Metro District, Regular Facilities Section