<![CDATA[This study analyzes the implementation of Class A aggregate base course spreading work on the Sei Pagar–Rantau Kasih–Batas Pelalawan road construction project in Kampar Regency. The analysis covers material composition, hauling and spreading stages, equipment use, compaction methods, and field density test results. A descriptive quantitative approach was used through field observation, technical interviews, document review, literature study, and documentation. The base course was designed with a thickness of 20 cm and a mixture consisting of 30% crushed stone 2–3 cm, 25% crushed stone 1–2 cm, 35% stone dust, and 10% sand. The work stages included hauling, dumping, spreading with a motor grader, watering, and compaction with a vibratory roller. A sand cone test at one point produced a field density of 100.01% relative to laboratory density and met the applicable technical requirement. The results indicate that the spreading and compaction procedures generally complied with the requirements; however, work-safety controls, traffic signs, gradation inspection, and the consistency of quality testing need to be strengthened. Recommendations focus on improving material, moisture, thickness, compaction-pass, and quality-documentation controls.]]>
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