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Undergrounding Discussion Page 1 of 2 Project P- ST- SW- W -11 -02 Attachment A Police and Fire have reviewed the proposed practices and have indicated th they are supportive of these measures. Work with property owners on the installation of street trees in the •.ulevard. Maintain a 7 foot boulevard on the east side of Dale Street betwe- n the pathway and the curb for street trees. B. Storm Ovate Concrete curb an. :utter will be installed as a part of the street rec catch basins will be usted to work with the new street alignm be installed where nee..• The majority of existing rural ditc removed. The boulevards -.d yards will be graded to drai Where this is not possible, cat basins will be extende 21 struction project; existing t. Additional catch basins will and culvert system will be o the street, where possible. nto yards. This road is located within the Gras ake Watershe District (GLWMO). GLWMO requires that this project provide volume control fo he stor ater runoff. This can be accomplished through the construction of infiltration tr- •c s and rain gardens within the Dale Street right of- way. These basins may require recons ion every 10 -20 years. Monitoring wells would be constructed in the infiltration trenches deter e when they need to be reconstructed. In an effort to provide a level of pre eatment for the torm water prior to discharging into the infiltration areas, catch basins w be constructed with e ra depth. These "sumps" will capture some of the sand and leaves at are inherent to storm wat' runoff. By removing this material at the catch basin, it will n. make it to the City's storm ponds, d improve water quality. These sumps will requir annual cleaning, and will be added to ou -nnual maintenance. 1. 2815 2823 P ale Street The project I reduce the amount of surface water competing for the apacity of the culvert u •er Dale Street. An infiltration basin is proposed for the boulev- d adjacent to 629 Terrac: •rive and 2815 Dale Street. This infiltration basin will be connected an additional cul rt under Dale Street doubling the outlet capacity for the drainage area. Da Street will o be lowered in this area to provide positive drainage from the yard at 2823 Dale street. 2751 Dale Street An infiltration basin is proposed for the boulevard adjacent to Dale Street. Additional catch basins will be installed to drain the water that floods the intersection. C. Private Utilities Private utility Companies have been notified that this project is being considered for construction in 2011. It is their responsibility to relocate facilities within the right- of- way that interfere with the City's proposed project. During the course of our public information process, residents have requested that staff look into the option of burying the overhead power lines that currently run along the west and east sides of Dale Street. Xcel Energy's preliminary estimate for this work is $170,000. This is the amount Xcel is expecting to incur above the cost of relocating the existing overhead facilities to accommodate portions of the new road design. There will also likely be some additional costs for easements necessary for ground mounted transfer switches and other equipment. Final costs will not be known unless the City requests preliminary design and a new scoping estimate, the cost for this is an upfront non refundable charge of $2,500 Burying the power lines would mean Feasibility Report Dale Street Reconstruction