A thorough evaluation of surface water damage begins with preparation and a clear understanding of what information to collect. If the site is part of a permitted development, civil engineering plan sets provide insight into the intended grading, drainage infrastructure, and flow paths. However, what was planned may not have been implemented, and modifications often occur after the permitting process is complete, whether from the developer, maintenance personnel, a private resident, etc. While these plans are valuable, they are rarely available before an inspection. When plans are not available, mapping tools such as satellite imagery can identify drainage features. This is especially important for larger-scale projects, where having a system in place beforehand supports consistent documentation.

When starting your on-site inspection, key steps include:

• Gather Documentation: Before the inspection, request photographs and videos, engineering drawings, maintenance records, and other documentation. If retained before the inspection, bring the site plan for reference to the inspection. Weather data could be researched.
• Use Technology: When a formal site plan is not accessible, satellite imagery can be a practical and effective alternative for identifying structures and documenting site-specific observations. Free tools like Google Earth are user-friendly and often include historical imagery that helps establish timelines or track changes over time. These resources are easily accessible on smart handheld devices, making them ideal for field use. Additionally, consider capturing aerial images with a drone during your inspection—these can offer unique perspectives and supplement your documentation with high-resolution visuals that ground-level photos may miss.
• Satellite imagery, whether obtained from free services or commercial providers, offers a valuable historical record of site conditions. These images can help establish a chronology of drainage patterns, erosion, and construction activities. Even when exact dates are unavailable, the sequence of changes over time can be highly informative. In many cases, satellite imagery reveals scarring from erosion or alterations to the landscape that are not evident from ground-level inspection. Similarly, drone imagery provides an invaluable overview of current site conditions and reveals spatial relationships that are inaccessible from the ground or a typical handheld camera.
• For large or complex projects, consider Haag’s 3D scanning and aerial documentation capabilities—that can capture and preserve site conditions as they existed following a specific event. This level of documentation is especially valuable when accuracy, scale, or legal defensibility is required. Haag’s scanning services provide high-resolution, measurable data that can be revisited long after the inspection, supporting detailed analysis, modeling, and expert testimony.
• Interview Witnesses: Property owners, maintenance staff, and neighbors can provide valuable context that complements site observations. Ask about past performance issues, maintenance routines, and any known modifications to the property. These conversations often reveal patterns or events that are not visible or correlate with site observations. When key personnel or witnesses are not available during your inspection, consider following up by phone. A brief, well-structured call can be just as effective in gathering critical information.
• Examine Drainage System: While onsite, examine the drainage systems’ upstream, onsite, and downstream. Look for signs of erosion, which indicate that high-energy water has interacted with the soil. In vegetated areas, missing or thinned vegetation may suggest recent or repeated water stress. Waterlines on trees, buildings, and other surfaces can confirm the height and extent of water elevations in the area. Additional indicators such as efflorescence, moss, algae, and wood rot point to long-term moisture exposure and can help distinguish between isolated events and chronic conditions.

By combining witness accounts, historical imagery, and detailed site observations, those performing inspections can develop a well-supported understanding of the events and conditions that led to water damage.