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Development of 170 MW Combined Heat and Power Facility

Commonwealth assisted Consumers Energy, as the Owner’s Engineer, with the development of a 170 MW combined heat and power (CHP) facility. The facility is intended to export power to the…

Substation Reconfiguration Protection and Controls

The Duke Energy Mitchell Ave Substation project is being done to increase reliability and to meet additional load demand for Duke Energy's customers.  Commonwealth is assisting Duke Energy with a…

University of Michigan Clinical Inpatient Tower Building Auxiliary Engineering Services and Tunnel Upgrade

The University of Michigan (U of M) has begun preliminary planning for the new Clinical Inpatient Tower (CIT) building and all associated site/infrastructure work, including new utility tunnels and new…

Physical and Electrical Design Services for the Expansion of a Substation

Avista received a new load request from a growing industrial customer with an tight schedule. Commonwealth provided design services for the distribution addition at one of Avista’s substations. This design…

Fremont Area Improvements Projects

Commonwealth prepared permit applications and supporting documents for activities associated with rebuilding 20 miles of the Melmore – Tiffin Center and Tiffin – Fremont Center 138 kV transmission lines in…

University of Michigan Ingalls Mall Tunnel Upgrades & Site Utility Upgrades

Commonwealth was involved with reinforcing and repairing existing concrete tunnel structure in the Ingalls Mall Area of the University of Michigan central campus for emergency vehicle and other loads, as…

Wabash Blissfield Ethanol Plant 138 kV Transmission Line Design

Commonwealth designed a new wood 138 kV transmission line 4.5 miles in length. Private easements were purchased for right-of-way and tree trimming. In addition, routing and permitting services were rendered…

Convert Aperture Card Images to Electronic Files

ITC-Midwest acquired Alliant Energy's Interstate Power and Light Company (IPL) high-voltage electric power lines and substations (34.5 kV and above) in Iowa, Minnesota, and Illinois. With that acquisition came over…

Northeast Reliability Interconnect

This project began as the 84-mile-long second 345 kV tie to New Brunswick stretching from Orrington Substation near Orrington, Maine, to an interconnection with New Brunswick Power at a point…

Sporn – Muskingum River 345 kV Transmission Line Rebuild

Commonwealth prepared permit application documents for activities associated with reconductoring and replacing structures along 50 miles of the Sporn – Muskingum River 345 kV line and Waterford 345 kV Extension…

Structure Replacement Foundation Design and Environmental Work

Dayton Power & Light (DP&L) plans to relocate a double circuit 138 kV lattice tower to accommodate a customer driven project. Commonwealth is assisting this effort by designing the foundation…

345 kV Transmission Line Relocation for Highway I-69 Extension

The extension of highway I-69 south of Indianapolis, Indiana, required IPL to relocate various portions of two of its existing 345 kV transmission lines. In addition to engineering and environmental…

115 kV River Crossing Tower Replacement

National Grid replaced four single circuit 115 kV river crossing lattice towers that delivered power across a 1,500 foot stretch across a river in Massachusetts. The previous towers were deemed…

University of Michigan Biological Sciences Building Tunnel Structure Reinforcement

University of Michigan (U of M) needed to reinforce and upgrade sections of their utility tunnel structure adjacent to the new Biological Sciences Building on U of M’s central campus…

Casing Record Search

In order to update its Geographic Information System (GIS) system, Consumers Energy needed to search records to identify gas distribution pipeline casing filler locations. To that end, 350 boxes of…

Alpine Power Plant Modifications

Commonwealth supported EPC Contractor Moran Iron Works (MIW) as the engineer of record for two new Frame Seven Exhaust and Silencers for Wolverine Power Alpine Power Simple Cycle Plant in…

Microgrid Battery Storage and Solar Generation

A Midwest Investor-Owned Utility (IOU) was interested in implementing a battery energy storage plus solar PV system to benefit their service territory. In particular, the end of the line user…

DTE Energy Services Staff Augmentation Support

DTE Energy Services (DTEES) chose one of Commonwealth’s Power Generation experts to assist in and support their development of a combined heat and power (CHP) facility that will be constructed…

Rebuild of Dalton Substation

Commonwealth was selected by Avista to design the complete rebuild of Dalton Substation.  The substation redesign was needed to increase the transformation capacity, improve line protection around the substation, improve…

CAPE Transmission System Model Build

Commonwealth's Data Management team worked under the direction of Project Manager and the Electrical Systems Department to update the short-circuit model of Southern Company's 115 kV, 230 kV, and 500…

NERC Standard PRC-026 Engineering Support

This utility, like other similarly registered NERC entities, is required to comply with the NERC Standard PRC-026-1 which ensures that their load-responsive protective relays do not to trip in response…

University of Michigan Matthaei Botanical Gardens Switchgear Commissioning Services

Commonwealth performed full commissioning services in support of the project to upgrade electrical services for University of Michigan’s Matthaei Botanical Gardens Facility located at Dixboro Road near University of Michigan’s…

Dearborn Industrial Generation (DIG) Inlet Cooling Study

Commonwealth performed a study to assist CMS Enterprises in evaluating the benefit of adding inlet air cooling to two combustion turbines at their facility in Dearborn, MI.  Plant performance was…

Recloser Upgrade Program

Commonwealth Associates, Inc. was hired by Northern Indiana Public Service Company (NIPSCO) to provide engineering design services for the replacement of 206 obsolete oil and vacuum reclosers. The program was…

Solar Generator Collector Systems Design

American Energy, Inc. needed a solar generator collector design to support a client in their Facilities Addition Study application. Commonwealth provided conceptual engineering drawings to support the Facilities Addition Study…

Substation Engineering Design and Analysis

A Northeastern Utility client needs to upgrade and replace components of a substation to meet the necessary load capacity. Commonwealth is providing engineering, design, and analysis services for the substation…

Replacement of Exhaust Systems at Midwest Gas Compressor Stations

Commonwealth supported TransCanada for exhaust replacement systems for Gas Compressor Stations at Thief River, MN, Deer River, MN, Shevlin, MN, Iron River, WI, and Wakefield, MI. The services involved a…

International Drive Distribution Automation System Improvements

Duke Energy Florida has an International Drive (I-Drive) system that is a unique distribution system designed to meet the high reliability requirements of customers along International Drive in Orlando, Florida.…

Consumers Energy Battery Energy Storage System

Consumers Energy, a large Michigan-based utility, selected Doosan GridTech to deliver one of the first battery energy storage systems for the energy provider. In turn, Doosan selected Commonwealth as its…

Mead-Phoenix 500 kV Transmission Line Structures

The Mead-Phoenix project involved a single-circuit 500 kV ac transmission line approximately 260 miles in length. The system was initially designed to transport 1300 MW of power between the McCullough…

System Impact Study / Transient Stability Analysis

Wolverine Power Supply Cooperative (WPSC) contracted with Commonwealth to provide a system impact study for the interconnection of a third-party generator (IPP) near Kalkaska, Michigan. The IPP intended to generate…

54-Mile 345 kV Transmission Line Design

Vermont Electric needed a new 345 kV H-frame transmission line design approximately 54 miles in length in mountainous terrain in Vermont for the purpose of reinforcing the existing transmission grid…

Physical and Electrical Design Services for Substation Needed for Wind Farm Interconnection

Avista needed to fulfill a large generator interconnection, in this case, a wind farm with firm deadlines for the design completion to meet the contractual in-service date. Commonwealth supported Avista…

Statewide Georgia Fiber Optic Network

Municipal Electric Authority of Georgia (MEAG) continues to develop a statewide fiber optic network to supply advanced telecommunications services to meet the needs of the Municipal Electric Authority of Georgia,…

Ninth & Central Substation – Distribution Rebuild

Commonwealth Associates, Inc. was hired by Avista Corporation (Avista) to design the replacement of the distribution portion of the Ninth & Central Substation due to its age, condition, and inability…

Crystal River Plant System Protection Redesign and Rebuild

Duke Energy Florida’s Crystal River Energy Complex includes coal fired and natural gas generating stations within a close distance from one another. The substation required a redesign and rebuild including…

Midwest Battery Energy Storage System

A Midwest Investor-Owned Utility (IOU) was interested in implementing a 5 MWH battery energy storage system (BESS) to benefit their service territory. Commonwealth teamed with a BESS EPC to deliver the…

Smart Grid Initiative Project

Commonwealth was selected to plan and manage engineering, procurement, and construction services for 128 Smart Grid substation projects over a 3-year period. Serving as MEAG Power's project manager, our responsibilities…

Document Turnover and Management

As part of its transmission system purchase from Consumers Energy, Michigan Electric Transmission Company (METC) needed to separate drawing and document control and management from Consumers Energy. This meant taking…

Communication Structural Analysis of Free-Standing Monopole

AT&T needed an analysis performed to assess the feasibility of equipment modifications on a free-standing monopole. The proposed modifications included replacing six platform-mounted antennas (Kathrein AP14-1900) with six platform-mounted antennas…

Anclote Plant – System Protection Redesign and Rebuild

Duke Energy Florida’s Anclote Generation Switchyard includes a large coal plant on site. The site has two units of generation. The substation required a redesign and rebuild including a new…

Repower Golden 2020

Commonwealth is providing Owner’s Engineering services to assist MillerCoors in determining the most cost effective means of providing their future steam and electric needs. MillerCoors currently receives steam and electricity…

Physical and Electrical Design Services for a 230 kV Substation

Avista is interconnected with another utility in Adams County, this interconnection is nearing its design ratings. With renewable energy interconnection requests and native load growth, Avista determined that building a…

Charlevoix Submarine Cable Study

Consumers Energy requested that calculations are performed on their Charlevoix submarine cable circuit to perhaps improve the values presently used and better the submarine cable circuit. Consumers Energy has an…

Baldwin to Hersey-White Cloud 138 kV Transmission Line Design

Wolverine Power Supply Cooperative, Inc. (WPSC) hired Commonwealth Associates, Inc. for the rebuild of approximately 18.4 miles of the Baldwin to Hersey-White Cloud Junction 69 kV transmission line in Lake…

ODOT I-75 Tower Relocation

Duke Energy has selected Commonwealth to perform engineering services for the rebuilding and relocation of two double circuit towers (138 kV and 69 kV) near the I-74 E exit toward…

Switching Station Design

Commonwealth was selected to be the Contract Engineer and provide design services for a new switching station for a Northeast utility. Commonwealth provided an entire design for a 115 kV…

Otisville, MI Compressor Station Arc Flash and Engineering Services

Commonwealth Associates, Inc. was contracted by TransCanada to perform electrical and civil/structural engineering services to replace an existing outdoor 480 volt circuit breaker. The circuit breaker was the main service…

High Energy Utility Pipe Inspections

Dearborn Industrial Generation (DIG) has chosen Commonwealth to perform studies of DIG's piping system to ensure safety, proper maintenance, and possibly insurance requirements were being followed. Commonwealth will assess their…

Substation Physical Security Modifications

Commonwealth was hired by a Northeastern utility to provide physical security for their substations. This client is required by NERC to provide physical security for their substations. The project consists…

Electric and Magnetic Field and Noise Calculations for the Hudson 115 kV Lines

Commonwealth computed the levels of electrical and magnetic fields and audible noise produced by National Grid's Hudson 115 kV transmission lines in eastern New York. Calculations were made for both…

TES Filer City Station Repower

The CMS Enterprises and Tondu Energy Services partnership selected Commonwealth to repower the existing steam turbine and fulfill the process steam needs with the use of combustion turbines and heat…

Warren Avenue Crossing Transmission & Distribution Line Analysis & Design

Seattle City Light (SCL) has a transmission and distribution line crossing of the Lake Washington Ship Canal at Warren Avenue. The crossing includes two lattice steel towers that were designed…

Lenawee County Airport Runway Protection Zone Expansion

The Lenawee County Airport required relocation of various property owners to expand the necessary runway protection zone for the Airport. Commonwealth provided relocation services to the Airport which included twelve…

West Side Reinforcement 138 kV Transmission Line Right of Way Acquisition

Commonwealth Associates, Inc. was hired by the Lansing Board of Water & Light (BWL) to perform right of way acquisition and preliminary engineering services for the construction of a 138…

University of Michigan Utility Tunnel System Repairs

The University of Michigan engaged Commonwealth to perform structural engineering design and provide construction administration services to repair and upgrade sections of the University’s extensive utility tunnel system.  Commonwealth provided…

Dearborn Industrial Generation Expansion Development

Commonwealth, as Owner’s Engineer, assisted CMS Enterprises with development of a project that would add 230 MW of combustion turbine capacity at their existing facility. The facility in Dearborn, MI…

Mount Pleasant Airport Avigation Easement Acquisition

Mount Pleasant Airport required the acquisition of multiple Avigation Easements to maintain clear runway approaches to the Airport. Commonwealth provided acquisition services for the Mount Pleasant Airport which included the…

Covert Plant Switchyard Design and Commissioning

Commonwealth was involved with the 1200 MW Covert Generating Station during its infancy in the conceptual design phase. Commonwealth assisted the owner, PG&E National Energy Group (NEG), with the interconnection…

Kamiah Substation Rebuild

Commonwealth designed the rebuild of the existing Kamiah Substation in Kamiah, Idaho for Avista. A complete redesign of a single, 20 MVA power transformer and three-feeder substation including a circuit…

Garden Peninsula Wind Farm 34.5/138 kV Substation and Transmission Line Design

Heritage Sustainable Energy hired Windemuller, Inc., to assist with their $75M Garden Wind project, located in Delta and Schoolcraft counties in Michigan’s Upper Peninsula. Commonwealth designed a new 13-mile-long 138…

Hunters Creek – Tuscola 120 kV Transmission Line Environmental Studies

Commonwealth performed environmental studies for 40 miles of double-circuit 120 kV transmission line right-of-way and prepared detailed permit applications for the Michigan Department of Environmental Quality (MDEQ). Commonwealth biologists delineated…

Downtown Milwaukee Reliability

Commonwealth supported UTEC Constructors, Inc., with engineering and permitting services for 8.5 miles of 138 kV underground transmission line that used a high-pressure, fluid-filled (HPFF), pipe-type cable system insulated with…

Oakland University Piping Inspection

Oakland University’s utility tunnel experienced flooding resulting in damage to the heating water pipe insulation and accelerated corrosion to the steel piping and pipe supports. Oakland University had concerns on…

University of Michigan Central Power Plant Life Safety Study

University of Michigan needed a life safety study performed on their Central Power Plant to ensure proper safety measures are met. Commonwealth was responsible for comprehensive field observations, analysis and…

Cross Winds Energy Park Wind Facility

Consumers Energy designed a 155 MW Wind Energy Facility in Tuscola County to help Consumers Energy meet state renewable energy requirements. The project involved a 345 kV transmission line interconnect…

Evaluation of Plant Voltage Fluctuations

Avista wanted to evaluate the voltage fluctuation that occurs during the motor starting condition and log chipping operation at a 1750 HP wood (log) chipper plant that is within proximity…

Operating Maps for ITC-Midwest Circuits

Commonwealth was contracted to create operating maps for approximately 600 individual circuits in the ITC-Midwest transmission system. To begin the process, ITC staff extracted transmission line information from their current…

Jackson County Reynolds Field Airport Runway Re-Alignment

The Jackson County Reynolds Field Airport needed a runway re-alignment which required acquisition of multiple properties to complete the re-alignment. Commonwealth managed the acquisition of 22 properties for the Airport…

Mooreland Oklahoma Compressor Station HVAC Equipment and Hot Water Circulation System Design

Commonwealth provided design for new boiler HVAC equipment and hot water circulation system for the TransCanada Mooreland Oklahoma Compressor Station. The plant upgraded the existing boiler from steam to hot…

Holmes Road Improvement Project

Commonwealth's responsibilities and tasks included securing an assortment of permanent easements, grading permits, and tree removal agreements on approximately 120 parcels for the improvement and widening of Holmes Road for…

Static Var Compensator Substation Design

Duke Energy Carolinas required a solution to resolve a portion of their territory that has been identified as having a high load pocket with little to no contingencies for serving…

Glenrock to Windstar Wind Farm 230 kV Transmission Line Design

Commonwealth Associates, Inc. was hired by MasTec/ Power Partners to provide a broad range of consulting engineering services for a transmission line project consisting of about 14 miles of a…

Roseland – Bushkill 230 kV / 500 kV Transmission Line Design

Public Service Enterprise Group (PSE&G) needed a new high voltage transmission line to help stabilize the high voltage grid within the PJM region. Commonwealth was selected to design a new…

Single Circuit 230 kV Design and Full-Length Optical Ground Wire (OPGW) Fiber Optics Projects

42-MILE SINGLE-CIRCUIT WOOD H-FRAME DESIGN AND FIBER OPTICS PROJECT American Energy, Inc. needed new high voltage transmission lines to interconnect new wind generation into the electrical grid to safely and…

Owner’s Engineer Project Drafting and Design Support

Switched Source LLC requested assistance on drafting and design support for their new power flow control technology that is being demonstrated in the utility market, showcasing the benefits of their…

Morgan Substation 69 kV Project Permitting and GIS Mapping

Commonwealth conducted a wetland delineation survey and prepared road right-of-way use permit applications for construction of a 4.5-mile 69 kV transmission line in Porter County, Indiana. Extensive GIS maps were…

Circuit Rating Documentation Update

The North American Electric Reliability Corporation (NERC) requires that the ratings of electric facilities be documented to ensure that all series elements are taken into consideration. In response to NERC's…

82nd Street Transmission Line Relocation Phase 2

Commonwealth prepared an Erosion and Sediment Control Plan for the relocation of approximately one mile of 138 kV transmission line due to an Indianapolis Department of Public Works road-widening project.…

Lattice Communication Tower Load Analysis

DTE Energy needed an analysis performed on the NE Substation communication tower to account for proposed changes in AT&T cellular equipment. Commonwealth was chosen to analyze the tower which also…

Wind Farm Licensing Support for 345 kV Transmission

SGC Engineering, LLC designed a 345 kV transmission line to connect the Turtle Creek Wind Farm to the transmission grid, located in Iowa. The 345 kV transmission line is single…

Battery Energy Storage System for ITC’s Novi, MI Headquarters

ITC was interested in installing their first Battery Energy Storage System (BESS) at a smaller scale at their Novi, Michigan headquarters to understand some of the battery applications. In doing…

AES Granite Ridge Transmission Line Interconnection

The Granite Ridge transmission line for AES Granite Ridge, LLC was necessary to interconnect approximately 700 MW of new combined cycle gas generation into the electrical grid to safely and…

Relocation of NIPSCo Electric Transmission Lines for Airport Expansion

Gary/Chicago International Airport Authority (“the Airport”) was required by the Federal Aviation Administration (FAA) to obtain additional airspace in their runway approach corridor for runway expansion. This necessitated relocation of…

University of Michigan Hoover Boiler Plant Commissioning Services

Commonwealth provided commissioning services for the Hoover Heating Plant. The Hoover Heating Plant includes four steam boilers, which supply steam to several buildings in the University of Michigan’s south campus…

Physical and Electrical Design Services for Rebuild of a Substation

One of Avista’s substations was experiencing significant load growth which led to the need for two larger transformers and another two feeders to be installed to support this increased load.…

345/115/23 kV Substation Rebuild

Commonwealth provided engineering design, material bid packages, and construction bid packages for rebuilding a bulk power substation. The substation consisted of a new 345 kV switchyard for a tapped line,…

Various Combustion Turbine Installations

Commonwealth, as Owner’s Engineer, is assisting Castleman with the development of numerous combustion turbine installations in Texas. The facilities utilize refurbished General Electric LM6000 combustion turbines in simple cycle mode.…

Belleville Road Acquisition

Commonwealth was hired by the Van Buren Township Downtown Development Authority to purchase an additional 27-foot right of way along the statutory right of way of Belleville Road to create…

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