R2016-144 Agreement with Chastain & Associates for Final Design Baltimore Road Drainage Improvements

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12/15/2016 Item Co"sheet One location, commonly referred to as the 32nd & Fulton Area, encompasses approximately 236 acres. It is bounded by 32nd Street on the west, Rt. 36 on the north, Blaine Lane on the east and Maryland Street on the south. This drainage area was rated as the 3rd highest priority in the City due to the number of households it affects and its contribution to sanitary sewer backups. A second location that ranked 14 on the priority list is a 57 acre neighborhood that lies south of Fitzgerald Road and east of 34th Street that is commonly referred to as Fitzgerald & Fontenac. This subdivision was constructed so that the drainage traveled through the back yards of the residences resulting in very limited storm sewers serving the area. These two areas will benefit greatly from the ability to drain into the proposed Baltimore Road storm drainage system. Finding good reliable discharge points is a significant step in relieving chronic flooding problems that plague many areas of the City. Professional Services Agreement With the completion of the preliminary drainage review, Chastain is now beginning their Baltimore Road drainage system design for the County and has prepared a scope of services to design in the added pipe size and other improvements requested by the City to improve drainage in the immediate area. The scope of services for the final design services includes: 1. The calculation of additional quantities and costs for the proposed size increase to the County's Baltimore Road storm sewer system. 2. Complete surveys of the areas adjacent to Baltimore that can drain to the new storm sewer. 3. Complete final designs and specifications for the extension of storm drains into the City drainage areas adjacent to the proposed Baltimore Road storm drain. The proposed engineering design cost is $125,958, which is between 9% and 10% of the expected construction costs and within a reasonable cost range. SCHEDULE: Chastain &Associates is currently working on the final design for the Baltimore Road Reconstruction Project for Macon County. Construction of the roadway and drainage improvements is expected to begin in 2018. PRIOR COUNCIL ACTION: • November 17, 2014 -The City Council approved Resolution R2014-132 authorizing a Professional Engineering Services Agreement between the City of Decatur and Chastain &Associates, LLC, for the amount of$62,622 to complete a preliminary design for the drainage improvements associated with Macon County's Baltimore Road Reconstruction Project. STORM DRAINAGE PRIORITIES: The 2009 Stormwater Master Plan addresses three main topics: 1. Stormwater Problem Area Prioritization 2. Regulation, Standards, and Policies 3. Stormwater Expenditures and Funding Mechanisms The Baltimore Road Storm Drainage Improvement Project addresses item 1 in the Master Plan. POTENTIAL OBJECTIONS: There are no known objections. INPUT FROM OTHER SOURCES: Bruce Bird, P.E., Macon County Engineer and Chastain &Associates, LLC. https://decatur.nowsagenda.com/agendaWeb/Co%erSheet.aspx?ItemID=970 26