SVC Permanent Survey Marks are purpose-built precast concrete blocks used to establish stable and lasting survey control points. They solve the critical problem of creating a reliable reference monument that will not shift or degrade over time, which is essential for land surveyors, engineers, and construction projects. Featuring a high-quality brass plaque cast into a solid concrete block, they provide a definitive point for future surveying activities, ensuring the long-term accuracy of property boundaries and infrastructure location.