Memorandum

City of Lawrence

Engineering

TO:	David P. Cronin, P.E., City Engineer
FROM:	Matt Bond, P.E., Stormwater Engineer
CC:	Charles Soules, P.E., Director of Public Works Mark Thiel, Assistant Public Works Director
Date:	October 1, 2013
RE:	October 8, 2013 Agenda Item Engineering Services for 23rd Street & Ousdahl Road - Project PW1134 Engineering Services for Stormwater & Geometric Improvements

Please include the following item on the City Commission agenda for consideration at the October 1, 2013 meeting:

Project Background. The intersection of 23rd Street and Ousdahl Road experiences flash flooding during heavy storm events and are frequently inundated and impassable to vehicular traffic.  This area was identified as Project Identification No. 8 in the 1996 Stormwater Master Plan. The existing storm sewer infrastructure currently provides a 2-year or less level of service which results in localized street flooding.

Project Description.  The City received four proposals for the engineering and design for this project.  Staff evaluated each proposal and arrived at a selection based on the following criteria:  unique qualifications and capabilities, fee for design services and   project understanding and approach.  Staff recommends that BG Consultants best addresses these outlined criterion. 

The project includes design of a storm sewer system from the west property line of Schwegler School to West 24th Street, 600' east and west along 23rd Street from Ousdahl Road, a possible detention basin located on the west portion of the Schwegler School parcel and geometric improvements for Ousdahl Road at 23^rd Street.  A hydrologic and hydraulic analysis will be conducted to help determine the most cost effective and prudent design. In addition to the design work for storm sewer and geometric improvements at the intersection the City Utilities Department needs to replace a water main from Iowa to Naismith Drive.  This main needs to be replaced as it is nearing the end of its design life and to provide a redundant piping network so that possible future problems can be isolated with a minimal amount of water services being interrupted.  This project is proceeding in 2014.  The design and construction of these infrastructure projects will be carefully coordinated to minimize the effect on the traveling public and to take advantage of staged construction opportunities.

Project Funding. The project is being funded from the Stormwater Utility Fund.

Action Request. If appropriate, Public Works staff requests the approval of an engineering services agreement with BG Consultants for engineering services for the design of stormwater and geometric improvement plans in the amount of $89,702.00.