Consultation on Proposed Changes to OPSS 501 Compaction Requirements.

TCP number

000-0323

Notice type

Standard

Applies to

OPSS - Ontario Provincial Standard Specifications

No. specification

OPSS 501

Posted by

Engineering Materials Office

Notice stage

Proposal

Proposal posted

October 23, 2026

Comment period

October 23, 2026 - November 13, 2026 (21 days) Open

Last updated

October 23, 2026

This consultation closes at 11:59 p.m. on:
November 13, 2026

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Proposal summary

This revision updated compaction requirements, incorporated Full Depth Reclamation (FDR) materials for acceptance purposes, and revised gauge calibration requirements, aiming to improve consistency in testing, construction quality, and contract administration.

Proposal details

This posting aims to seek feedback from industry stakeholders on the following key changes:

1. Full Depth Reclamation (FDR) Materials •Clarify that granular materials include Full Depth Reclamation (FDR) materials under OPSS 330 for the purpose of meeting OPSS 501 requirements.

2. Gauge Calibration Requirements

•Update gauge calibration requirements to improve consistency and reliability of in-place compaction testing.

3. Embankment Compaction Requirements

•Update uniform minimum compaction requirements for earth and granular embankments.

Supporting materials

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