Georgetown Combined Sewer Rehabilitation Project: Sewer Lining and - - PowerPoint PPT Presentation

Georgetown Combined Sewer Rehabilitation Project:

• Sewer Lining and Chemical Grouting
• Sewer Inspection and Cleaning
• Sewer Repair (O Street NW Excavation)

1

March 30, 2017

Project Overview

Excavation location (sewer repair)

2

• Important project to revitalize

some of the District’s oldest sewers

• Relining of approximately 5,600

linear feet of affected sewer pipe

• Sewer damaged from

corrosion

• Trenchless rehabilitation to

limit impact (accessing sewer via area manholes)

• Excavation will be needed

at one location for sewer repair: Between 3318 & 3320 O Street NW

• Overall project Duration is 420

days

• Construction schedule-see

project information sheet

O Street Excavation: Aerial View

Location of excavation

240-ft

3

34th St. NW O St. NW 33rd St. NW 19” x 30” Arched Sewer

4

O Street Excavation: Sewer Defect Views

View of bulging sidewall in 19”x30” Sewer Enlarged view

O Street Excavation

5

Open Cut Excavation Location

• Estimated Size: 10’L x 12’W x 20’D
• Construction Schedule: 5/30/17-7/6/17

(subject to change)

• Parking spaces: +6 per side (+12 total)
• Trolley Tracks: No Impact (Remain in Place)
• Paving materials: Salvaged and reused
• Contractor: Masonry and historic

preservation experience

• Road closure during excavation
• Lane closure and parking lane closure during sewer repair
• Discharge piping at ground level
• Potential security considerations during work at this location
• Effort underway to avoid open cut excavation (TBD by 5/10/17)

Impacts of O Street Open Cut Excavation

• Protection of trees and shrubbery in the construction zone
• Monitoring of noise and vibration levels
• Coordination of construction/restoration activities with other area

projects and stakeholders * Hyde-Addison Elementary School Modernization Project * Georgetown University

• Installation of temporary piping system inside existing sewer to

allow for continuous flow (also known as the Flume technique)

Mitigation Efforts

8

• Pavement bricks that are temporarily removed from the

sidewalk and parking lane between 3318 and 3320 O Street during the sewer repair will be carefully marked (numbered) to ensure proper replacement, and they will be safely stored at an off-site location. Once the repair is completed, the bricks will be returned and carefully restored in accordance with design specifications under the DDOT O and P Streets Rehabilitation Project

• Extensive pre-construction and post-construction photo

documentation

Key Site Restoration Requirements

DC Water Project Manager: Willis Thomas (202) 787-7616 or willis.thomas@dcwater.com (weekdays, from 8:00 a.m.-4:00 p.m.) DC Water Construction Outreach Coordinator: Tanya Hedgepeth (202) 787-2202 or tanya.Hedgepeth@dcwater.com DC Water Project Contractor: Proshot Concrete, Inc.-Albert Pugliese (757) 620-4840

Primary Project Contacts:

Questions????