Frequently Asked Questions

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Frequently Asked Questions

Bridge & Rail Crossing Design and Permitting

How is pipeline work conducted when there is traffic?

Traffic control plans, designed in accordance with DOT standards, may be required to conduct the gas main or pipeline construction. These plans direct the contractor to set up the required safety signage to manage traffic during construction.

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Bridge & Rail Crossing Design and Permitting

Can the existing pipeline stay in service while work is performed?

In some cases, a temporary bypass may be required while new piping is being installed. The most cost-efficient way is to shut down the pipeline while the replacement is being performed. CHI has designed for both situations many times.

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Prefabricated Regulator & Meter Stations

Does CHI produce both above-grade and below-grade installations?

Yes, CHI has designed and construction a wide variety of above-grade and below-grade installations, which allows our clients to adapt the design to a variety of sites in urban, suburban or rural environments.

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Prefabricated Regulator & Meter Stations

Will you deliver these to my site? How?

Our team designs meters and regulator stations to be transported by standard trucking method carriers. We transport these stations over the road, and a team from CHI will accompany the equipment and install it at your site.

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Prefabricated Regulator & Meter Stations

Are engineering/feasibility studies like a project proposal? What type of valves and regulators does CHI use?

We will use the equipment that our clients most prefer. If not specified, we will use the equipment that our experience has told us will provide the best value and long term reliability of operation to the client.

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Main Replacement Program Design & Management

How much does a natural gas main replacement cost?

The exact cost of the project will be determined by the scope, including the location, length and depth of the mains. CHI’s estimations include contractor pricing and take into account real world situations encountered in construction.

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Main Replacement Program Design & Management

Have you worked on natural gas pipeline replacements like mine before?

CHI’s engineers have widespread experience in the field and have previously worked for several major natural gas companies. This has equipped our team with the customer-focused knowledge necessary to execute all project phases taking into consideration any possible complications.

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Main Replacement Program Design & Management

What is the typical planning cycle for a main replacement program?

The exact duration of the project will depend on the scope (i.e. the size and length of mains to be replaced). Typically, contractor work packages should be completed and ready to go well before the beginning of the construction season.

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Pipeline Design

Does CHI self perform all aspect of pipeline construction?

No, typically we make use of experts in each area, such as survey, land agents, and ROW acquisition. We have lead and managed pipeline project teams and also performed in supporting roles as part of a pipeline project team.

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Pipeline Design

Can CHI handle the permitting and other logistics?

Yes. The required pre-construction activities include surveys, environmental permits, ROW negotiations and route selections – all of which falls under our comprehensive project management services.

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Meter & Regulator Stations Design and Construction

How do you handle noise control from natural gas pipeline construction?

We are proactive when it comes to controlling noise on project sites. Our team performs a source treatment, which establishes where noise will be coming from and equipment that can be specified to reduce noise generation.

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Meter & Regulator Stations Design and Construction

How long do meter and regulator station projects usually take to complete?

Typically, these engineering projects take less than a year, with an average of eight months. However, the scope of your project will determine the exact timeframe. The design phase can take three to four months and construction can take three to five months.

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Meter & Regulator Stations Design and Construction

What are some of the specific technical issues involved with meter stations?

There are safety, security, and environmental restrictions as well as metering requirements for minimum and maximum flow. Also, remote control pressure regulation, odorant injection, preheating system design and acoustic treatment.

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Truck Loading/Unloading Stations

How automated can the LNG truck loading/unloading process be?

CHI can automate this process by implementing touchscreen controls allowing for the truck driver to perform most of the operation, minimizing the need for additional staff to load and unload the LNG.

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Truck Loading/Unloading Stations

How long should it take to load/unload an LNG tanker?

This will depend on many factors, but the typical time for loading or unloading a standard LNG tanker is one hour or less.

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