PLENARY SESSION 4: Panel Discussion on Unforeseen Risk-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines how owners, design-builders, general contractors, specialty subcontractors, and engineers can identify and fairly manage geotechnical risks in deep-foundation projects.<br /><br />Design-build delivery offers a single point of responsibility, collaboration, innovation, and schedule flexibility. However, design and construction often overlap, investigations may be limited, and project scope can evolve. This can blur responsibility for design, subsurface conditions, and changes—especially when construction begins before design is complete. Early involvement of specialty contractors, coordinated risk assessments, clear communication, and ongoing monitoring can help manage these uncertainties.<br /><br />The presentation highlights the legal and contractual implications of unforeseen conditions. Under the Spearin doctrine, owners may be responsible for defective specifications, but design-builders can lose some of this protection by assuming design obligations. Differing site conditions may involve conditions that materially differ from contract descriptions or are unusual for the work. Contract disclaimers and requirements to investigate can shift substantial risk, so parties should review obligations carefully, understand applicable law, and avoid accepting unbounded investigation duties.<br /><br />When conditions or scope change, teams should compare subcontract terms with the original proposal, preserve agreed scope limits, and provide timely notice. Accurate drill logs, daily reports, field journals, and cost records are essential to document conditions and support claims. Clear notice procedures and prompt reporting should be understood by all parties.<br /><br />The central recommendation is to discuss risks early and allocate them to the parties best positioned to manage them. Additional site characterization, fair time-and-materials provisions for changed conditions, secondary design checks, insurance, and early specialty-contractor participation can support a more balanced approach. The goal is not to eliminate risk, but to share it equitably through transparent contracts, collaboration, and reliable documentation.

Keywords

geotechnical risk

deep-foundation projects

design-build delivery

differing site conditions

Spearin doctrine

subsurface conditions

contract disclaimers

specialty subcontractors

risk allocation

project documentation