The Dalles Public Works on Wednesday will begin a stormwater system main installation project on West 10th between Walnut and Snipes streets, and it will impact traffic in three stages.  The project will begin with intermittent eastbound lane closures on West 10th, with cones and signs will direct traffic to temporary lane adjustments for two or three days.  As the work area moves to the intersection of West 10th and Walnut, through traffic will be detoured to West 6th via Webber and Snipes.  The last stage of the project will require a full road closure on West 10th from Walnut to Snipes for up to eight days, with through traffic detoured to West 7th.  The estimated time for completion of the entire project is two to three weeks, weather permitting.  Work hours will be 6:30 a.m. to 5:00 p.m. weekdays and possibly during the weekends.  No parking will be allowed within the work area due to heavy equipment use and the location of the trench.  No parking signs will be place on the curb 48 hours before the project moves into each work area.