Avoid Costly Construction Washout: Key Erosion Control and Stormwater Measures
Building on sloped or challenging terrain requires more than simply preparing a foundation, especially with the increase in heavy rainfall and extreme weather events. Owners, developers, and contractors must prioritize a clear understanding of site conditions and follow a responsible construction sequence to prevent costly washouts and minimize environmental impacts.
The process begins in preconstruction with thorough soil testing to identify natural drainage patterns and determine what types of structures and foundations the site can support. Before any sitework begins, required erosion controls should be installed along the perimeter and in key interior areas, based on the site’s size, grading, and the presence of water features. As initial work gets underway, such as clearing for access, stormwater management measures like surface basins and upstream erosion barriers should already be in place to control runoff and sediment.
As the project progresses, land clearing should move from higher elevations downward to preserve natural buffers and reduce erosion risk. Rough grading should be followed promptly by stabilization efforts, including placing loam and seeding grass or vegetation. Additional protections such as silt fencing, coir logs, and biodegradable erosion blankets should also be installed to help maintain soil stability and prevent displacement.
While these measures are not overly complex, many projects still face costly delays due to inadequate attention to ground cover and stormwater management. Because every site is different, Meridian Associates develops Operations and Maintenance (O&M) manuals that align with state erosion and sediment standards as well as local regulations. Following these guidelines helps owners, developers, and contractors avoid unexpected site issues and certification delays.
Ignoring these requirements can quickly create problems. One Massachusetts developer learned this firsthand after attempting to speed up vegetation growth by hydroseeding sandy soil without first adding loam. Although grass initially sprouted, it failed to survive without proper support and watering. The instability led to repeated project shutdowns by the local municipality until the site was restored and reseeded in accordance with the O&M manual, allowing vegetation to establish successfully.
A residential development team recently learned the hard way what can happen with minimal erosion control. After rough-grading a hillside in the fall, they relied on just a single staked straw bale at the base of the slope. By the spring thaw, silt and sediment had washed off-site onto neighboring properties, creating a messy and costly problem.
Fixing it required a full retrofit, including a diversion swale, additional straw bales, silt fencing, properly compacted topsoil, and biodegradable erosion control blankets with hydroseed. The time and expense of correcting the issue far exceeded what proper planning would have required upfront.
Situations like this are avoidable. Bringing in experienced site and civil design professionals early helps establish a smart construction sequence and keeps projects on track. Simply put, doing it right the first time saves time, money, and headaches.
