sewer rehabilitation planning Articles

Turning data into decisions: Europe’s sewer rehabilitation tool

CARE-S, a computer-based system for wastewater network management, is due to be launched later this year. BILL MCCANN speaks to SVEINUNG SAEGROV, editor of a new book from IWA Publishing which reports on the system’s development and the benefits it will offer network managers. Wastewater network managers in Europe will soon have available an advanced rehabilitation planning system based on an ...

Jun. 1, 2006

By WRc plc

Comparing the utility of decision trees and support vector machines when planning inspections of linear sewer infrastructure

Closed-circuit television inspection technology is traditionally used to identify aging sewer pipes requiring rehabilitation. While these inspections provide essential information on the condition of pipes hidden from day-to-day view, they are expensive and often limited to small portions of an entire sewer system. Municipalities may benefit from utilizing predictive analytics to leverage ...

Nov. 10, 2014

Risk assessment of sewer condition using artificial intelligence tools: application to the SANEST sewer system

Operation, maintenance and rehabilitation comprise the main concerns of wastewater infrastructure asset management. Given the nature of the service provided by a wastewater system and the characteristics of the supporting infrastructure, technical issues are relevant to support asset management decisions. In particular, in densely urbanized areas served by large, complex and aging sewer ...

Feb. 19, 2014

Quantification of sewer leakage by a continuous tracer method

Water authorities interested in the evaluation of the structural state of a sewer must quantify leakage to plan strategic intervention. However, the quantification of the exfiltration and the localisation of structural damage are challenging tasks that usually require expensive and time-consuming inspections. Herein, we report one of the first applications of the QUEST-C method to quantify the ...

Jan. 1, 2011

Evaluating the role of deterioration models for condition assessment of sewers

Ensuring reliable structural condition of sewers is an important criterion for sewer rehabilitation decisions. Deterioration models applied to sewer pipes support the rehabilitation planning by means of prioritising pipes according to their current and predicted structural status. There is a benefit in applying such models if sufficient inspection data for calibration, an appropriate ...

Aug. 21, 2015

Pipeline infrastructure renewal at Miami-Dade Water & Sewer Department

Abstract Various governmental, professional and private studies have shown that the replacement costs of underground pipeline infrastructure is excessive and that best practice approaches for infrastructure risk management promote condition assessment programs to understand the actual condition of individual pipe sections in order to best allocate limited capital replacement and ...

Nov. 18, 2014

Alum creek large diameter sewer assessment case study

The Challenge The City of Columbus, like many municipalities, must make hard decisions on where to spend their limited capital improvement dollars. In tight economic conditions, a municipality’s decision to monitor, rehabilitate, or replace their assets is not cut and dry. Deferred maintenance of non-critical assets in one department may give other departments the monetary resources ...

Nov. 21, 2014

By Chester Engineers

An Update on the Columbus Wet Weather Management Plan

ABSTRACTUndergoing a system wide program for a metropolitan area of over 1 million people to address SSOs is a challenge. The same can be said for addressing CSOs throughout a system. Columbus is addressing both at once, creating a particularly daunting challenge. Columbus submitted one large report, the Wet Weather Management Plan (WWMP), to the Ohio EPA on July 1, ...

Oct. 22, 2006

Recovery of New Orleans Water and Sewer Systems Following Hurricane Katrina

ABSTRACTHurricane Katrina and its aftermath damaged the water distribution system and the sewerage collection system in the City of New Orleans, creating health and safety issues for both the general public and emergency and recovery personnel working in the city. The efforts by the Sewerage and Water Board of New Orleans (S&WB) in restoring these systems has been critical in making the city ...

Oct. 22, 2006

Comprehensive Infrastructure Renewal Program Addresses Aging Water and Sewer Infrastructure in Miami-Dade County

As industry studies continue to highlight the issues surrounding aging water and sewer infrastructure, policy-makers at the local, state and national level of government are beginning to recognize the problem and make infrastructure renewal programs a priority. One approach that combats the issues surrounding aging water infrastructure is asset management. This approach to infrastructure renewal ...

Aug. 2, 2015

Reducing Ruptured Reputations – Assessment Tools Reduce Risk of Failure on Sewer Force Mains

A ruptured sewer pipe can attract a lot of unwanted attention, even when it happens on private property. Last year, hours before celebrities were to arrive at the Golden Globes Awards show at the Beverley Hills Hotel, a reputed sewer pipe burst, spewing a mess of wastewater on the red ...

Aug. 6, 2015

Process to Estimate Sanitary Sewer Pipe Remaining Life Provides MWWSSB Remedial Decision Information

ABSTRACTA condition assessment study for the Water Works and Sanitary Sewer Board of the City of Montgomery’s (MWWSSB’s) West Catoma Interceptor (WCI) was conducted in 1998 and 2003. The WCI was evaluated in 1998 using core sampling, closed-circuit television, and manhole (MH) inspections. Approximately 193 MHs and 65,000 linear feet (LF) of pipe were inspected. A subsequent study conducted in ...

Oct. 22, 2006

City of belmont performs comprehensive analysis on rising force mains to guide long-range planning

To help budget over the next 20 years, the City of Belmont (City) wanted to proactively understand and assess their force mains through a comprehensive condition assessment. Located in the San Francisco Bay area, Belmont serves 26,000 residents and maintains more than 90 miles of sewer mains comprising of 85 miles of gravity mains and 5 miles of force mains, of varying size ...

May 25, 2016

Los Angeles Collection System Agreement: a Win-Win Partnership & Success Story

ABSTRACT During February 1998, the wettest February in Los Angeles’ history, sanitary sewer overflows (SSOs) occurred in a number of communities with the majority occurring in the Eagle Rock and South Los Angeles areas. In response to these SSOs, the Santa Monica Baykeeper (BayKeeper) filed a Federal lawsuit against the City asking for injunctive relief due to the SSOs. In January 2001, the ...

Oct. 13, 2007

Risk assessment study for water supply network using GIS

In recent years, contamination of water in water distribution systems (WDS) has been recognized as a major cause of waterborne diseases. Owing to old and deteriorated pipes, and the presence of pollution sources in contact with the supply line, water boards often decide to replace the network in the interests of public health. This being a cost-intensive and time-consuming programme, decision ...

Jan. 1, 2010

2001 Miniscgongo creek stream repair / environmental restoration - 8 projects Haverstraw, New York

GEA conducted hydraulic studies and analysis as well as preparation of engineering plans, specifications, and bid documents for stream rehabilitation, environmental restoration, bank stabilization and channel improvements of the Minisceongo Creek in Haverstraw, New York for Rockland County Drainage Agency. The project known as Contract 2 encompassed designs for eight (8) sites including:· ...

Apr. 6, 2011

By GEA Engineering PC

Overview of Infrastructure Asset Management A View from Both Sides of the Atlantic Ocean

AbstractEurope and the United Kingdom (UK) are at the forefront of Asset Management for water utilities. This is primarily due to the fact of privatization of water utilities in the UK. The UK is currently in the third generation of the Asset Management procedures and has well defined methods for identifying and managing assets. In the United Kingdom (UK), large scale Asset Management has been ...

Oct. 22, 2006

City Of West Palm Beach Reaches Out To Community With Proactive Approach To Manage Critical Force Main

The City of West Palm Beach (WPB) makes a concerted effort to engage its citizens. As one of the three largest cities in South Florida, WPB is a vibrant, growing waterfront community with a population of more than 100,000. Since 1974, WPB has experienced exponential growth in its population and correspondingly, in its wastewater ...

Sep. 19, 2016