Memorandum

City of Lawrence

Utilities Department

TO:	Thomas M. Markus – City Manager Diane Stoddard – Assistant City Manager Casey Toomay – Assistant City Manager Brandon McGuire – Assistant to the City Manager
FROM:	Troy Shaw – Project Engineer
CC:	Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Philip Ciesielski – Assistant Director of Utilities Beth Krishtalka – Assistant to Director Bob Brower – Utilities Operations Superintendent Scott Fewins – Utilities Manager Chuck Soules – Director of Public Works David Cronin – City Engineer Matt Bond – Stormwater Engineer
DATE:	June 22, 2016
RE:	Authorize the City Manager to execute a supplemental agreement with BG Consultants for the design of the Utility Relocations (UT1505) related to the 23^rd and Ousdahl Storm Sewer Project (PW1134).

Background

The intersection of 23^rd Street and Ousdahl Road experiences flash flooding during heavy storm events and is frequently inundated and impassable to vehicular traffic (see attached map).  This area was identified as Project No. 8 in the 1996 Stormwater Master Plan. The existing storm sewer infrastructure currently provides capacity for a 2-year or less storm event which results in localized street flooding.  In other words there is a greater than 50-percent chance of this type of storm event occurring in any given year. At its October 8, 2013 meeting, the City Commission approved an engineering services agreement with BG Consultants in the amount of $89,702.00 for the design of stormwater and geometric improvement plans for the intersection. At its September 22, 2015 meeting, the City Commission approved supplemental agreement #1 for additional surveying & engineering services.

Project Description

The project included the design of a storm sewer system from the west property line of Schwegler School to W. 24th Street, 600' east and west along 23^rd Street from Ousdahl Road, a stormwater detention basin located on the southwest corner of the Schwegler School property, geometric improvements for Ousdahl Road at 23^rd Street, and new storm sewer from Ousdahl Road to Naismith Creek. 

During the design process, BG Consultants determined it will be necessary to relocate the existing waterline at multiple locations and relocate approximately 620 feet of sanitary sewer along 23^rd Street West of Ousdahl Road in order to allow for the storm sewer pipe and inlet installations. In order to limit the disruption to the neighborhood existing waterline scheduled for replacement on Ousdahl Road from 23^rd Street to 24^th Street will also be included as part of this project (see the attached map) It is anticipated that the construction of the utility relocates and waterline replacement will be completed with the storm sewer project.

Project Funding

Engineering services for supplemental agreement #2 will be funded from the Department of Utilities bonded construction fund per the adopted Capital Improvement Project Scenario 5 for the 2013-2017 period.

Action

Authorize the City Manager to execute a supplemental agreement with BG Consultants in the amount of $19,500.00 for the design of the necessary Utility Relocations (UT1505) related to the 23^rd and Ousdahl Storm Sewer Project (PW1134).