Build on Rocky, Sloped Terrain—Without Overbuilding Your Site

Rocky soil, steep slopes, and irregular layouts often force developers into difficult tradeoffs—more grading, more foundations, or more complexity in the field. 

Each can add cost, extend timelines, and introduce additional environmental constraints. 

At the Bom Jardim Solar Plant in Brazil, these challenges put project feasibility at risk. 

This case study explores how the project team approached site constraints differently, helping reduce earthmoving while maintaining installation efficiency on a highly complex site. 

The site presented a combination of constraints that are common—but difficult to solve together: 

• Near-surface rock that limited traditional pile installation 
• Sloped and uneven terrain that would typically require extensive grading 
• Pre-drilling requirements that can increase cost and slow construction 
• Environmental considerations tied to soil disturbance and drainage 

Conventional solutions risked increasing both CAPEX and schedule pressure.  

Instead of relying on a single solution, the project team applied a coordinated strategy across site design, foundation approach, and tracker selection. 

Without overhauling the entire site, this approach was designed to: 

• Reduce the need for large-scale grading 
• Adapt to terrain rather than reshape it 
• Maintain installation efficiency despite added complexity 
• Preserve key site characteristics, including natural drainage 

The full case study details how these decisions were implemented—and how they worked together in practice. 

For developers and EPCs working in rocky or sloped environments, early design decisions can have a disproportionate impact on: 

• Site preparation costs 
• Construction timelines 
• Environmental approvals 
• Long-term system performance 

Small changes in approach can materially affect project economics—but only when applied in the right combination.