Dry utilities refer to the infrastructure and services that provide electricity, natural gas, and telecom to buildings and properties. These are called “dry” utilities because they do not involve the transportation or distribution of water, as opposed to wet utilities such as storm drains, sewage systems, water, and wastewater systems. We will highlight six examples of dry utilities, their uses, and the dry utility installation process.
Dry Utility Types at a Glance
Common dry utilities found on most commercial and industrial projects typically fall into three categories.
- Power includes electrical power lines and service conduits that deliver energy to buildings and infrastructure.
- Communications covers fiber optics, cable, telephone, and internet or television infrastructure required for data and connectivity.
- Energy generally refers to natural gas pipelines and related service lines that support heating, power generation, and industrial operations.
On the flip side, wet utilities refer to services that include water, such as storm drains, sewers, and water and wastewater systems.
What Is Dry Utility Coordination and Why It Matters
Dry utility coordination is the process of coordinating the design and installation of the above dry utilities alongside other construction activities on a project. For this to happen, close communication and collaboration between the various project stakeholders is required.
As part of dry utility coordination, the project team conducts site visits to document slope angles, soil conditions, and site topography. This vital step ensures that the dry utilities are installed safely and efficiently in the most appropriate location without interfering with other underground infrastructure or project activities.
The engineered design will come as construction drawings. These are based upon the on-site conditions, including utility mapping and detailed notations on how the installation will comply with all regulations, codes, and required materials.
Trenching and Underground Layout for Dry Utility Installation
Most dry installation projects start with a trench being dug to house these utilities. The next step is to excavate the trench and make use of high-quality instruments for laying the bedding and the installation of the utilities.
The cables are then encased with shading materials to safeguard them from any damage that could occur over time. Lastly, backfill services are completed.
It is crucial to find a specialized/qualified contractor, such as Muller, Inc., who can coordinate, plan, and execute the installation of telecommunications, data, electric, natural gas, cable, and telephone dry utility infrastructure. This is because working with electric and gas utilities is dangerous for anyone who is not a regulated and qualified contractor.
Coordination with engineers and the appropriate city and county departments required during construction will also be necessary at times. Inspections will also need to be performed regularly to ensure that each step has met all the essential criteria.
Dry Utility Installation Process: From Planning to Final Inspection
The dry utility installation process generally follows a defined sequence, although specific steps may vary depending on site conditions and project requirements. Each phase must be reviewed and applied as appropriate for the project.
- Site Preparation: Site preparation establishes access and staging areas and may include clearing, grading, temporary road installation, and material storage.
- Excavation: Excavation involves safely trenching and installing shoring where required in accordance with OSHA standards.
- Conduit Installation: Installation consists of placing conduits per the approved design, cleaning and testing conduit runs, and installing required equipment or fixtures.
- Testing and Inspection: Testing and inspection verify that conduit runs are clean, functional, and compliant with project specifications.
- Encasement and Backfill: Encasement and backfill are performed when required by design, including concrete encasement and rebar installation, followed by approved backfill and compaction to bring the trench to grade.
- Restoration: Restoration is completed according to contract requirements and may include temporary or permanent road patches, hot mix asphalt, concrete, topsoil, grass seed, straw, and erosion or safety fencing.
- Cable Pulling: Cable pulling is performed by a qualified contractor in accordance with engineered designs and industry safety standards.
- Final Connections and Inspection: Final connections tie utilities into main lines and service providers following approved installation procedures. Final inspection is coordinated with inspectors and project stakeholders to confirm all requirements have been met.
Joint Trenching (Common Trench Utilities)
Joint trenching, also known as common trenching, refers to installing multiple utilities within the same trench when permitted by engineering design and regulatory requirements. This approach is commonly used for service lines and main lines where electricity, gas, telecommunications, and water utilities have been properly engineered and approved for shared installation.
Joint Trench Planning and Design
The joint trenching process begins with site preparation and excavation of a trench wide enough to maintain required separation distances between utilities. Strict compliance with spacing, depth, and safety standards is critical during planning and layout.
Utility Installation Sequence
Utility installation follows a prescribed order based on regulatory and design requirements. Inspections are completed at defined stages before subsequent utilities are installed to ensure compliance and safety.
Wet Utility Testing and Approvals
Wet utility components may require pressure testing, bacteriological testing of water systems, and backfill or compaction inspections prior to proceeding with additional installations.
Backfill, Restoration, and Final Approvals
Once both dry and wet utilities have passed final inspections, remaining backfill, compaction, paving, and restoration work can be completed. Final inspections and approvals are required for all installed utilities. Failure to comply with approved construction plans can result in work stoppages until issues are corrected and re-inspected.
Dry utilities are a crucial aspect of the building process and must be planned, coordinated, and executed with precision to avoid conflicts, safety risks, and costly delays. Full compliance with construction plans and building codes is essential, and engaging experienced professionals is the most effective way to achieve it.
Partner With Muller for Dry Utility Coordination and Installation
Muller, Inc. brings extensive experience across the full range of dry utilities, including power, telecommunications, and gas infrastructure. Our team works directly with engineers, municipalities, and utility providers to plan, coordinate, and install dry utilities efficiently while minimizing conflicts, delays, and compliance risks.
If you are planning a development or infrastructure project and need a trusted partner for dry utility coordination and installation, contact Muller today to discuss your next steps.
