## [[Risk Action Plan]] ### [[Risk Description|Description]] Due to potential inaccuracies in existing utility location records, there is a threat that unknown underground utilities may be encountered during excavation, which may lead to utility damage, service interruptions, and construction delays. > [!abstract]- Risk Analysis — Key Assumptions & Current Controls (click to expand) > > **Key Assumptions:** > - The existing utility record drawings provided by EPIC Water Authority and Toad Town represent the best available information but may not reflect field-verified as-built conditions for all buried utilities. > - The primary excavation areas involve cutting through an area of the facility that was last modified in the 1970s, where record-keeping for buried piping was inconsistent. > - BUILT RIGHT CONSTRUCTION is responsible for utility locating and potholing prior to excavation per the contract general conditions; utility damage caused by failure to pot-hole is contractor risk. > - Any utilities found to be uncharted or in unexpected locations that affect the construction sequence may qualify as a differing site condition under the contract. > > **Current Controls:** BUILT RIGHT CONSTRUCTION has contracted a licensed utility locating service (811 call-before-you-dig program) for all planned excavation areas. The project design includes a utility conflict matrix developed from record drawings. Potholing has been completed at the 12 highest-risk conflict points identified in the design phase. > [!abstract]- Sources of Information & References (click to expand) > > **Sources:** > - [[EXHIBIT C - General Conditions]] > - [[Section 01 14 00 Work Restrictions]] > > **Attachments:** > - None ### [[Risk Mitigation Strategy]] Reduce the likelihood of encountering unknown utilities by requiring comprehensive vacuum excavation potholing ahead of all mechanized excavation within the facility boundary. [[Donkey Kong]] is to ensure BUILT RIGHT CONSTRUCTION's subcontractor potholing is completed and documented in advance of each excavation phase, with a minimum 5-day lead time. Where utility conflicts are found, immediately document location and depth, update the utility conflict matrix, and evaluate impact on the construction sequence before proceeding. ### Possible Additional Actions - Perform ground-penetrating radar (GPR) scanning along the full length of the new pump station intake trench corridor before excavation begins, to supplement the 811 locates and potholing with a continuous subsurface image. - Request EPIC Water Authority's facilities maintenance team to walk the site with the project team and share institutional knowledge of buried utilities not shown on record drawings — longtime operators often have site-specific knowledge that never made it onto drawings. - Ensure the differing site conditions clause of the contract is reviewed with BUILT RIGHT CONSTRUCTION's project manager so the proper notice procedures are understood before any excavation begins. ### Comments & Recommendations The likelihood rating of "unlikely" reflects the fact that potholing has already been completed at the primary conflict points and no surprises have been found. The moderate consequence accounts for the fact that even a single unknown utility encounter in a critical path area could cause a multi-week delay. GPR scanning would further reduce the residual likelihood at low incremental cost relative to the potential delay exposure. ### Status - [ ] [[2026-01-15]] ^status-2026-01-15 - 📊 **Potholing Status:** Risk identified during review of excavation subcontractor plan; 12 priority conflict locations have been potholed with no unexpected utilities found to date. Remaining potholing for Phase 2 excavation areas is scheduled for February. - 🟡 **GPR Recommendation:** GPR scanning along the intake trench corridor has been recommended to [[Donkey Kong]] as an additional risk reduction measure; decision pending cost estimate from specialty subcontractor. > [!abstract]- Status History (click to expand) > > *(No prior entries)*