East Water Purification Plant Expansion to 350 mgd

CLIENT: City Of Houston, Texas

CONTRACT TYPE: Sub-Contract To J.F. Thompson, Inc.

PROJECT DESCRIPTION: Comprehensive evaluation of Electrical, Instrumentation and Controls of the East Water Purification Plant (EWPP) to achieve a firm reliable capacity of 350 mgd.

YEAR COMPLETED: 2001

CONSTRUCTION COST: N/A - Study

SCOPE OF WORK: Kalluri Group, Inc. was responsible for performing a comprehensive electrical evaluation of the existing plant facilities to identify electrical improvements required to achieve a firm reliable capacity of 350 mgd. The study included a comprehensive audit of the Electrical Distribution, SCADA, and Instrumentation and Control systems of the existing plant. In addition, a detailed Short Circuit and Load Flow analyses were performed to fully understand the existing electrical distribution system and the impact of proposed improvements. The analyses were performed using "SKM Systems Analysis, Inc." software.

The study identified improvements based on the type of deficiency such as Compliance/Code Requirement, Safety, Reliability, Design Requirement, and Operability and Maintenance.

Some of the major recommended improvements included:

• Replacement of existing 5kV Switchgear.
• Relocation of one 138 kV transmission line to achieve State Compliance
  requirements for reliability.
• Ground Fault relaying for 4.16 kV Loops.
• Redundant PLC processors and a redundant ethernet to improve reliability
  of the SCADA system.
• Control Wiring corrections at Chlorine Buildings
• Electrical Power for Filter Air Scour Blowers, Low Lift Pumps and Chemical
  Process Improvements.

The probable construction cost of the recommended improvements is estimated at $9.5 million.