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File #: 20-252    Version: 1 Name:
Type: Study Session Item Status: Agenda Ready
File created: 6/11/2020 In control: Town Council
On agenda: 6/11/2020 Final action: 6/11/2020
Title: Discussion of Sanitary Sewer Repairs Contract
Attachments: 1. Attachment A - PowerPoint Presentation
TO: Mayor Bien-Willner and Town Council Members

FROM: Jill B. Keimach, Town Manager
Jeremy Knapp, Community Development Director
Paul Mood, Town Engineer

DATE: June 11, 2020

DEPARTMENT: Engineering

Staff Contact Paul Mood, Town Engineer, 480-348-3573

Discussion of Sanitary Sewer Repairs Contract

Presentation and discussion regarding a proposed contract for sanitary sewer repairs.

Per the Town's Intergovernmental Agreement with the City of Scottsdale for Wastewater Treatment the Town is in the process of completing year four of a five-year sanitary sewer assessment program. The sewer assessment program consists of the inspection and numerical ranking of all sewer pipes and manholes. For sewer pipes, a camera is run through the pipe and a video is taken. The video is then reviewed and the pipe is given a numerical ranking based on its condition. Based on the numerical ranking of the sewer pipes a maintenance program can be developed. Town staff are notified of any immediate repairs needed and notified of any ductile iron sewer pipe found. The harsh sewer environment will corrode ductile iron pipe over time which may result in structural failures. As such, all ductile iron pipe identified, regardless of condition, will be lined with a cast in place sewer liner for use in sanitary sewers.

The sewer assessment program recently identified six locations of ductile iron pipe. Three of the locations need immediate repairs. The recommended repair is to line the sanitary sewer with a cast in place pipe. This is consistent with recommendations from the City of Scottsdale Water Resources Department staff.

The proposed contract will line the six segments of sanitary sewer identified below and shown graphically in the attached presentation:

1. Saguaro Place: 152 feet
2. Mockingbird Lane: 32 feet
3. 69th Place: 322 feet (immediate repair)
4. Roadrunner Lane: 299...

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