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Idaho's precast concrete drainage work on state projects is governed by the Idaho Transportation Department (ITD). The requirements for drainage structures, reinforced concrete pipe, box culverts, and the concrete itself live in the Idaho Standard Specifications for Highway Construction, 2023, with details carried on the state's standard drawings. Precast producers read those documents alongside the project plan set to know what to make and how it will be accepted.
This page links the core ITD documents a precast producer or estimator uses: the standard specifications, standard drawings, approved products, and where bid plans are posted. We are still documenting how ITD presents drainage structures on plan sets.
Idaho Standard Specifications for Highway Construction, 2023. The sections below cover precast drainage structures, pipe, culverts, and concrete.
Section numbers are a reference. Confirm them against the current specification and any special provisions for your project.
Section 605 covers storm sewers, manholes, inlets, and catch basins, with related drainage items in Sections 608 pipe aprons, 609 headwalls, and 706 pipe.
Still researching the approved products list for this state.
We are still documenting how ITD presents drainage structures on plan sets.
DhyanaERP has not built a ITD parser profile yet.
DhyanaERP Drainage Summary Import reads a plan set, finds the drainage structure sheets, transcribes them under a strict extraction contract, checks the engineering, and turns each row a person confirms into a priced structure. This status describes DhyanaERP's reading capability only. It is not a statement of DOT approval.
See DhyanaERP Precast EditionEvery link points to the agency's own site.
DhyanaTech is not affiliated with or endorsed by any state DOT.
Reference only. Not engineering or legal advice. Always confirm against the current specifications and the contract documents for your project.
Last verified November 2026.