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Otisville, MI Compressor Station

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…

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…

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.…

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…

Sporn – Muskingum River 345 kV 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…

Mooreland Oklahoma Compressor Station

Commonwealth provided design for new boiler HVAC equipment and hot water circulation system. The plant upgraded the existing boiler from steam to hot water which required design of a new…

Kamiah Substation Rebuild

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

Erving Energy Switching Station Design

Commonwealth was selected to be the Contract Engineer and provide design services for a new Eversource Energy switching station referred to as Erving. Commonwealth provided an entire design for a…

Roseland – Bushkill 230 kV / 500 kV Transmission Line

This project involves designing a new 45-mile double-circuit 230 kV/500 kV steel pole transmission line to replace an existing 230 kV transmission line on a narrow 150-foot-wide right-of-way. A portion…

345 kV Realignment for I-69 Extension Project

Indianapolis Power and Light Company 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…

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…

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…

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…

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…

Warren Avenue Crossing

Seattle City Light 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 in…

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…

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…

Haddam 345/115/23 kV Substation

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,…

Hunters Creek – Tuscola 120 kV Transmission Line

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…

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…

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…

Belleville Road Acquisition

Van Buren Township Downtown Development Authority 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…

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…

Covert Plant Switchyard Design and Commissioning

PGE - NEG 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),…

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.…

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…

West Side Reinforcement 138 kV Transmission Line

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…

Alpine Power Plant

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…

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…

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

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…

Southern Loop 345 kV Project

This project is 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…

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…

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…

Baldwin to Hersey-White Cloud 138 kV Transmission Line

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…

Southington CIP 14 Physical Security Mods

Commonwealth was hired by Eversource to provide physical security for their substations. Eversource is required by NERC to provide physical security for their substations. The Southington CIP 14 project consists…

Central Power Plant Life Safety Study

Commonwealth was responsible for comprehensive field observations, analysis and report to establish options for plant upgrades for entire plant fire protection, suppression, life safety, egress, and hazardous material storage. Study…

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…

Wabash Blissfield Ethanol Plant 138 kV Transmission Line

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…

Ninth & Central Substation – Distribution Rebuild

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

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…

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…

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…

Glenrock to Windstar Wind Farm 230kV Transmission Line Project

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…

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…

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…

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…

Ingalls Mall Upgrades Tunnel & 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…

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…

Casing Record Search

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

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…

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