DALLAS -- Anyone who has had the opportunity to drive Main Street through downtown since Wednesday (Sept. 11) is undoubtedly aware that work on the 800-900 block between Mill and Washington streets has begun.Crews from Brown Contracting began sidewalk demolition on the east side of the street last week, closing off the east lane of traffic.One lane will remain open throughout the Dallas Urban Renewal Agency (URA) project, which is slated to be finished by the end of October -- with the exception of final cleanup and lane striping."The work will be 99 percent done by Oct. 30," said John Swanson, Dallas city planner.Drivers should expect brief delays and be aware that the open lane will switch periodically depending on which side of the road crews are working on.Major work on the east side sidewalk is scheduled through Sept. 25. Then the crews will switch to the west side sidewalk until Oct. 10. Installation of pervious concrete, asphalt paving, and installation of lighting and street furniture will occupy the balance of the project schedule.That will bring to an end the URA's most ambitious downtown "streetscape" project yet. It is estimated to cost $750,000 -- completely paid for with URA funds -- and required an extensive planning process to get to this point."We have been working on this for almost two years and it's finally happening," Swanson said.The URA previously completed smaller projects on one block of Southeast Mill Street and one block of Southwest Court Street.Swanson characterized the work as a "temporary inconvenience for permanent improvement" and stressed that residents and shoppers shouldn't avoid the area.He said through careful planning and cooperation with the contractor, the intention is to keep access to businesses open and have as little interruption to traffic flow as possible."We are going to keep downtown open for business throughout the duration of the project," Swanson said.The businesses most impacted by the project will be updated daily and notified of any significant changes in the project schedule, Swanson added.For more information about the project, call John Swanson at 503-831-3572.