Boring CSI Code
Architects, engineers, and construction managers use CSI MasterFormat codes to specify and organize underground utility work. Trinity Boring Solutions is positioned to perform work across multiple MasterFormat divisions relevant to underground utility installation in Oklahoma.
Discuss Your Specification RequirementsWhat Is CSI MasterFormat and Why It Matters
The Construction Specifications Institute (CSI) MasterFormat is the master list of numbers and titles for organizing specifications and other written information for commercial and institutional building projects. First published in 1963 and periodically updated, MasterFormat provides a standard organizational framework used throughout the construction industry by architects, engineers, specification writers, contractors, and subcontractors to ensure consistent communication about project scope and requirements.
MasterFormat is organized into divisions numbered from 00 through 49. The divisions most relevant to underground utility construction work fall within Division 31 (Earthwork) and Division 33 (Utilities). These divisions contain the specification sections that cover excavation, backfill, trenchless installation, and the installation of water, sewer, gas, and communications utility systems that constitute the bulk of Trinity Boring Solutions’ work scope.
For contractors responding to formal bid solicitations on construction projects, understanding the applicable MasterFormat divisions is essential for identifying the work scope, interpreting the project specifications, and preparing accurate bids. Specification writers who are developing construction documents for projects that include underground utility boring and installation work can reference the MasterFormat sections below to understand how this work is typically organized and specified. Related pages: NAICS codes, certifications, directional drilling services.
Horizontal directional drilling falls within CSI MasterFormat Division 33 Utilities specifications
Division 31: Earthwork
Division 31 covers earthwork operations including site clearing, excavation, grading, and related earth disturbance activities. For underground utility projects, the Division 31 sections most relevant to TBS work include:
| Section | Title | TBS Relevance |
|---|---|---|
| 31 10 00 | Site Clearing | Site preparation before utility installation including clearing of surface obstructions |
| 31 20 00 | Earth Moving | Excavation for entry and exit pits, trenching for utility installation, backfill and compaction |
| 31 23 00 | Excavation and Fill | Trench excavation for utility installation, pit excavation for HDD access, structural backfill |
| 31 23 16 | Excavation | Detailed excavation specifications including soil classification, shoring requirements, and safety provisions |
| 31 23 23 | Fill | Trench backfill specifications including material requirements, lift thickness, and compaction standards |
| 31 25 00 | Erosion and Sedimentation Controls | Stormwater management and erosion control during utility installation projects |
Division 31 Earthwork specifications govern excavation methods, soil classification, and backfill requirements
Division 33: Utilities (Primary TBS Division)
Division 33 covers the installation of water supply, sanitary sewerage, storm drainage, fuel distribution, and electrical and communications utilities. This is the primary MasterFormat division governing Trinity Boring Solutions’ utility installation work. Key Division 33 sections include:
| Section | Title | TBS Relevance |
|---|---|---|
| 33 05 00 | Common Work Results for Utilities | General utility installation requirements including bedding, backfill, pipe joining, and testing |
| 33 05 23 | Trenchless Boring and Pipe Installation | Primary specification section for HDD, auger boring, and other trenchless utility installation methods |
| 33 05 26 | Utility Identification and Warning Tape | Requirements for marking and identifying buried utilities after installation |
| 33 11 00 | Water Utility Distribution Piping | Water main installation specifications including pipe materials, joint types, and pressure testing |
| 33 11 23 | Submersible and Jet Water Pumps | Pump station installation associated with water distribution systems |
| 33 31 00 | Sanitary Utility Sewerage Piping | Gravity sewer installation specifications including pipe materials, grade requirements, and testing |
| 33 34 00 | Sanitary Utility Sewerage Force Mains | Force main installation specifications for pressurized sewer systems |
| 33 40 00 | Storm Utility Drainage Piping | Storm drain installation specifications |
| 33 51 13 | Natural Gas Underground Piping | Natural gas distribution and service line installation specifications |
| 33 71 00 | Electrical Utility Transmission and Distribution | Underground electric distribution conduit installation specifications |
| 33 82 00 | Communications Distribution | Telecommunications and fiber optic conduit installation specifications |
Section 33 05 23: Trenchless Boring and Pipe Installation
Section 33 05 23 governs HDD and other trenchless installation methods in formal construction specifications
CSI MasterFormat Section 33 05 23 is the most directly relevant specification section for Trinity Boring Solutions’ core HDD and trenchless installation services. This section covers horizontal directional drilling, auger boring, pipe ramming, and other trenchless methods used to install underground utilities without open-cut excavation along the installation route.
A typical 33 05 23 specification section includes requirements for contractor qualifications, equipment specifications, pre-construction submittals, drilling fluid management, bore path design and tolerances, installation procedures for pilot bore, reaming, and pullback, inspection and testing requirements, and documentation to be provided upon completion. Specification writers preparing 33 05 23 sections for Oklahoma projects can reference published master guide specifications from organizations including the American Society of Civil Engineers and local municipal standard specifications as starting points, then customize for project-specific requirements.
When Trinity Boring Solutions receives project bid documents containing a 33 05 23 specification, we review the requirements carefully and submit any required qualifications documentation, equipment information, and method statements as part of the bid or pre-qualification process. Compliance with project-specific 33 05 23 requirements is incorporated into our project planning and execution process. For engineers developing specifications, we are available to discuss our capabilities relative to specification requirements during the design phase. Contact us at the contact page or call (405) 409-7423. See also our technical HDD guide. External: NASTT, Okie811, PHMSA.
Other Relevant Divisions for Underground Utility Work
Division 02: Existing Conditions
For utility rehabilitation and replacement projects, Division 02 (Existing Conditions) covers investigation of existing subsurface conditions, subsurface utility engineering, and assessment of existing infrastructure. Ground-penetrating radar surveys, vacuum excavation for utility exposure, and as-built investigation work fall within Division 02 and may precede Division 31 and 33 work on rehabilitation projects.
Division 32: Exterior Improvements
Pavement restoration after utility installation work falls within Division 32 (Exterior Improvements). After open-cut utility installation in paved areas, or at the entry and exit pit locations for HDD projects, pavement replacement work is specified under Division 32 sections covering asphalt paving, concrete paving, and pavement marking. TBS coordinates with paving subcontractors for Division 32 work associated with our utility installations.
Division 40: Process Integration
For industrial facility utility installations involving process piping and mechanical systems, Division 40 (Process Integration) may apply alongside Division 33 for utility distribution. TBS has performed boring work for industrial facilities where product piping, compressed air systems, and other process utilities required underground crossings within the plant boundary.
The range of MasterFormat divisions applicable to TBS work reflects the breadth of our underground utility installation capability. We are positioned to respond to formal bid solicitations that reference these divisions across water, sewer, gas, electric, and communications utility installation work throughout Oklahoma. Our utility installation methods guide and trenchless installation page provide additional technical context for specification development.
Frequently Asked Questions: CSI Codes Trinity Boring Solutions
What CSI MasterFormat divisions apply to directional boring work? +
Directional boring and trenchless installation work primarily falls under Division 31 (Earthwork) for excavation and backfill, and Division 33 (Utilities) for utility installation. Section 33 05 23 (Trenchless Boring and Pipe Installation) is the most specific applicable section.
Why do CSI codes matter for underground utility projects? +
CSI MasterFormat codes organize project specifications, bidding documents, and contracts. Proper classification ensures boring and utility work is correctly specified and bid in formal construction procurement, preventing scope gaps and misunderstandings.
What is Section 33 05 23? +
Section 33 05 23 is the CSI MasterFormat section for Trenchless Boring and Pipe Installation. It governs HDD, auger boring, and other trenchless utility installation methods in formal construction specifications.
Does TBS respond to formal bids with CSI specification sections? +
Yes. When we receive bid documents containing CSI specification sections applicable to our work, we review the requirements carefully and comply with qualification, submittal, and documentation requirements specified.
What Division 33 sections cover water main installation? +
Division 33 11 00 (Water Utility Distribution Piping) covers water main installation specifications including pipe materials, joint types, bedding, and pressure testing requirements.
What CSI section covers natural gas distribution piping? +
Section 33 51 13 (Natural Gas Underground Piping) covers natural gas distribution and service line installation specifications in the CSI MasterFormat system.
How does CSI MasterFormat relate to specifications for Oklahoma municipal projects? +
Oklahoma municipalities typically reference CSI MasterFormat in their standard specifications and contract documents for utility construction projects. Many municipalities have customized master specifications organized by MasterFormat section numbers.
Does TBS provide pre-construction submittals required by specifications? +
Yes. We prepare and submit the required documentation for projects with formal specification requirements, including equipment information, method statements, drilling fluid submittals, and operator qualifications documentation.
What CSI section covers telecommunications conduit installation? +
Section 33 82 00 (Communications Distribution) covers telecommunications, fiber optic, and coaxial conduit installation in the CSI MasterFormat system.
Can TBS assist engineers in developing specifications for boring projects? +
Yes. We are available during the design phase to discuss our capabilities, typical specification requirements, and project-specific conditions that should be addressed in the contract documents. Contact us to set up a pre-design consultation.
Trinity Boring Solutions Performs Across the Full Utility MasterFormat Spectrum
From Division 31 earthwork to Division 33 utility installation, TBS delivers professionally specified underground utility boring work throughout Oklahoma. Contact us today.
Request a Free QuoteCall us: (405) 409-7423 | darren@trinityboringsolutions.com
How CSI Division Codes Apply to Underground Utility Construction
The Construction Specifications Institute (CSI) MasterFormat division codes provide a standardized framework for organizing construction specifications, cost estimates, and project documentation across all types of construction projects. Architects, engineers, and project owners use CSI codes to structure specification sections, organize bid packages, and coordinate submittals across all trades on a construction project. For underground utility contractors, understanding the relevant CSI division codes helps ensure that our scope, material submittals, and closeout documentation align with the project specification structure.
The CSI division most directly relevant to Trinity Boring Solutions’ work is Division 33, Utilities. Within Division 33, the sub-sections that cover our primary work include 33 11 00 (Water Utility Distribution Piping), 33 12 00 (Water Utility Distribution Equipment), 33 30 00 (Sanitary Sewerage Utilities), 33 40 00 (Storm Drainage Utilities), 33 51 00 (Natural Gas Distribution), and 33 71 00 (Electrical Utility Transmission and Distribution). Directional boring and trenchless installation methods used to install these utilities are typically specified within the applicable piping or conduit section, with reference to the applicable trenchless installation specification.
Division 31 and Earthwork Sections
Earthwork associated with utility installation, including bore pit excavation, trench excavation, backfill, and compaction, falls under CSI Division 31, Earthwork. Relevant sub-sections include 31 20 00 (Earth Moving), 31 23 00 (Excavation and Fill), and 31 23 23 (Controlled Low-Strength Material as Trench Backfill). For HDD and auger boring projects, the pilot bore and product pipe pullback operations are typically specified in a separate Trenchless Installation section, often referenced as Division 33 or as a specialty specification section within the applicable utility division.
Hydrovac excavation and utility potholing, services Trinity Boring Solutions provides as part of pre-bore site investigation and damage prevention, fall under Division 31 earthwork sections covering selective excavation and utility locating. Specification writers familiar with trenchless construction often reference NASTT guidelines and manufacturer specifications in the CSI-formatted specification sections covering HDD and auger boring work.
Coordinating CSI Documentation with General Contractors
On commercial and institutional projects where Trinity Boring Solutions operates as a specialty subcontractor, our scope of work is typically defined by one or more CSI specification sections that the general contractor references in the subcontract. Trinity Boring Solutions reviews these specification sections at the start of every project to confirm that our methods, materials, and documentation practices align with what the specification requires. When specification requirements differ from our standard practices, we address the discrepancy with the general contractor before work begins, not after the inspection.
CSI division code standards are maintained by the Construction Specifications Institute. Specification writing guidance for underground utility construction is also available from NASTT. Oklahoma public project specifications often follow ODOT standard specifications for highway utility crossings and right-of-way work.
Submittals, RFIs, and Closeout Under CSI Division 33
On commercial and institutional projects organized under the CSI MasterFormat system, Trinity Boring Solutions participates in the standard submittal, RFI, and project closeout processes. We provide material submittals in advance of installation, including product pipe data sheets, conduit manufacturer information, drill fluid material safety data sheets, and equipment certifications where required by the specification. Submittal review cycles on projects with tight bore schedules are a common point of tension, and Trinity Boring Solutions submits early to allow adequate review time before our installation window opens.
Project closeout documentation for underground utility work typically includes as-built bore path records, pressure test certifications for pressure piping systems, and cathodic protection installation records for metallic pipelines. Trinity Boring Solutions provides complete closeout packages in the format required by the specification, reviewed against the project’s closeout checklist before submission to confirm nothing is missing. For projects where owner-furnished documentation is required from the utility owner before our scope is considered complete, we coordinate that handoff proactively rather than waiting for the closeout punch list to surface it.
Contact Trinity Boring Solutions to discuss your CSI Division 33 project documentation requirements: (405) 409-7423 or our contact page. We are at 9102 NW Expressway, Yukon OK 73099. Trusted by plumbers, electricians, municipalities, and the United States government for properly documented underground utility construction in Oklahoma.
Ready to Start Your Oklahoma Underground Utility Project?
Trinity Boring Solutions handles underground utility installation for every project type and every client category in Oklahoma. We have completed boring and trenching projects for residential plumbers who need a single service lateral, for electrical contractors who need conduit run across a commercial parking lot, for municipal utilities managing city-wide infrastructure programs, and for federal projects requiring certified payrolls and strict documentation standards. In every one of those contexts, our standard does not change: the bore hits grade, the product pipe lands exactly where the plan shows, and the documentation reflects what was actually installed.
We are based at 9102 NW Expressway, Yukon OK 73099, which puts us minutes from the Oklahoma City metro and within reach of projects across the entire state. Our phone is answered around the clock for emergency situations at (405) 409-7423. For planned projects, you can reach our project team the same way, and we will schedule an on-site evaluation to confirm bore path conditions before producing a written proposal.
Service Area: Oklahoma City metro, Tulsa, Lawton, Enid, and statewide
Services: HDD Directional Drilling | Trenching | Hydrovac | Auger Boring
Clients: Trusted by plumbers, electricians, municipalities, and the United States government
Contact: (405) 409-7423 | darren@trinityboringsolutions.com
For CSI specification compliance documentation or to discuss your Division 33 project requirements, call Trinity Boring Solutions at (405) 409-7423 or contact us at our contact page. Our email is darren@trinityboringsolutions.com. We are located at 9102 NW Expressway, Yukon OK 73099 and are fully equipped to meet CSI MasterFormat documentation standards on commercial, institutional, and public underground utility projects in Oklahoma. Trinity Boring Solutions is trusted by plumbers, electricians, municipalities, and the United States government for properly specified and documented underground utility construction work throughout the state.