Regional Wastewater Systems Evaluations

Wylie, Texas

When additional customer cities are added to a regional wastewater facility, or when the choice is between a plant expansion or resurrecting a mothballed WWTP, determining the best course of action can be daunting.  We recently helped one client with this decision at two separate regional systems.  In both cases, we coordinated flow and rainfall monitoring and associated inflow/infiltration analysis, Q vs. i analysis and development of future storm and flow projection scenarios.  Population and flow projections were considered as was the cost of returning old facilities to service. At one facility the Owner decided to expand an existing facility from 1.5 MGD to 3.0 MGD; PECI designed the plant expansion.  In another, PECI conducted a subsequent study evaluating adding two new customers in the regional system.

Asset Condition Evaluation and Development of Standard Procedures Manual

Dallas, Texas

PECI completed proof of concept and beta studies to use Maximo® for Infrastructure Condition Assessments for the Trinity River Authority Central Regional Wastewater System. User-defined fields in Maximo® were established for priority scores, replacement cost and timing, funding source, and other attributes related to the planned replacement or rehabilitation of assets.

PECI personnel developed two Procedures Manuals for Maximo® Data Entry. The first Procedures Manual, published in November 2011, detailed the entry of Assets, Locations, Specifications and Job and PM Plans.

The second Procedures Manual, published as a separate project in November 2013, detailed the entry of Purchase Requisitions and Work Orders. The guidance documents aimed at standardizing equipment maintenance and record keeping procedures and focused on tasks frequently completed by the daily user of Maximo®.

PECI personnel conducted training with operations and maintenance personnel at each major Northern Region project to review the Maximo® date entry procedures and advocate standardization across the projects.

Wholesale Rate Model Update

Arlington, Texas

Mark Perkins and Charlotte Smith have assisted with recent updates of its current wholesale wastewater cost of service model, and with a subsequent amendment to include an additional wholesale wastewater customer, the City of Mansfield. The cost of service model accounts for the specific proportion of Arlington’s collection system capacity used by each wholesale customer when calculated the monthly transportation fee.

Managed Asset Evaluation

Caddo Mills, Texas

Perkins Engineering Consultants, Inc. was retained by U.S. Water Services Corporation (USW) to develop an inventory and condition assessment database for water and wastewater system assets operated by USW for the City of Caddo Mills, Texas.  The evaluation ranked criticality, condition, and other attributes for the City’s wastewater treatment, water distribution, and wastewater collection facilities, including seven wastewater lift stations.

Water System Appraisal

Hudson Oaks / Coalition of Parker County Communities

Perkins Engineering Consultants, Inc. was retained by the City of Hudson Oaks, Texas, representing a coalition of several cities in Parker County, to appraise the Deer Creek Waterworks System for public sale. The appraisal involved an assessment of replacement costs (less depreciation) for the system’s physical assets, as well as an assessment of the debt service capacity supportable by projected system revenues. This assignment was completed in 2006. Physical assets of the system included a wastewater treatment plant, five groundwater production, storage and pumping stations, seven lift stations and approximately 33 miles of buried piping.