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PROPOSED CONSTRUCTION Project P-SW-99-14 Larpenteur Avenue Reconstruction and Streetscape Project Ramsev Countv Roadway Reconstruction (Arona Street to Oxford Street� Ramsey County's proposed reconstruction is a continuation of their overall effort to reconstruct Larpenteur Avenue from T. H. 280 to Dale Street. The work proposed in 2000 is from Arona Street (just east of Snelling Avenue in the City of Falcon Heights) to O�ord Street (just east of Le�ngton Avenue). The portion of this project abutting ` Roseville is between Hamline Avenue and �ford Street. Generally, the project involves the replacement of the e�sting 4-lane concrete roadway with a new 4-lane concrete roadway. Minor geometric changes will be made at intersections to improve safety and traffic flow. In addition, minor adjustments will be made to the exiting storm sewer system to match the new roadway. Special Considerations Roadwa� Width Originally, Ramsey County proposed to widen Larpenteur Avenue by appro�mately 1.5 feet on each side. Following numerous discussions with adjoining cities, the County has revised their proposal to eliminate a11 roadway widening. Larpenteur Avenue will be reconstructed to the same width as exists today. Gotfried Pit -- Stormwater Improvements Gotfried Pit, named after earlier gravel mining operations, is a stormwater detention pond on the north side of Larpenteur Avenue between Hamline Avenue and Fernwood Street. It is owned and operated by Ramsey County. Drainage from a watershed of appro�mately 550 acres flows into the pond via gravity storm sewer and is pumped into St. Paul and eventually flows to Lake Como. The volume of the 4.Sacre basin is appro�mately half of that needed to store a 100- year rain event. Given the sma11 site and close pro�mity of adjoining development, little can be done to increase the basin's volume and flood storage capacity. The County however, is proposing to lower the bottom of the pond by approximately 8 feet. While this modification will not increase flood storage, it will improve the ponds ability to improve water quality — an estimated 10% reduction in phosphorus to Lake Como. On-road Bike Lane The project includes the construction of a 4-foot wide on-road bike lane and shoulder. In an effort to eliminate widening the bike lane will be incorporated into the roadway gutter. It will be constructed out of a different color concrete to better delineate it from the vehicle tra�el lanes.