A stretch of shoreline on Long Lake, Minnesota, was losing sand every time the water kicked up, and the yard behind it wasn't draining the way it should. The property needed more than loose stone piled at the water's edge; it needed a system that could manage both wave energy and the water moving through the ground behind it.
Natural Environments Corporation, a design-build landscape contractor serving the western Twin Cities lakes area, took on the erosion and drainage problems together rather than treating them as separate issues. The Long Lake, MN property sits on open water where wave action steadily works against the beach, and the existing setup was not equipped to hold ground or manage runoff from the house above. The project combined Rip Rap Installation with a dedicated drainage plan built specifically for the site's slope and water flow.
Key Takeaways
- THE CHALLENGEWave action was washing out beach sand while poor drainage behind the shoreline compounded the erosion problem.
- THE DRAINAGE SYSTEMCrews rerouted downspout drain tile, flattened the beach slope, and installed a full drainage collection system with a curtain drain behind the rip rap.
- THE RESULTThe shoreline now holds its sand against wave action while water infiltrates the ground instead of pooling or running off.
Rip rap alone can hold a bank in place, but it cannot fix a drainage problem hiding behind it. NEC's approach on this Long Lake shoreline paired hard armoring with a dedicated water-management plan so the stone and the ground behind it worked together, rather than the water simply finding a new path around the fix.
Project Summary
| Client Profile: | Lakefront homeowner on Long Lake, Minnesota |
| Project Location: | Long Lake, MN, within NEC's Minnetonka and Wayzata service area |
| Primary Objective: | Stop active beach erosion and correct poor drainage behind the shoreline using Drainage Solutions |
| Drainage System Installed: | Rerouted downspout drain tile, a full drainage collection system, and a curtain drain installed behind new Rip Rap Installation |
| Key Outcome: | Stabilized beach slope with reduced sand washout and improved water infiltration into the ground |
Long Lake Shoreline Erosion Diagnosis
The beach slope on this property was steep enough that wave action repeatedly pulled sand away from the shoreline. Left unaddressed, that pattern would have continued to eat into the usable beach area year after year.
Beyond the visible sand loss, water moving down from the house through the downspout system was not being managed once it reached the shoreline. Without a way to collect and hold that runoff, the ground behind the shoreline stayed saturated, which made the erosion problem worse rather than isolated to wave action alone.
Installing Rip Rap and Drainage
The crew's first move was to flatten the beach slope, which reduces the angle wave action has to work against and cuts down on how much sand gets pulled off the beach with each wave. From there, the team rerouted the downspout drain tile so that water coming off the house's roof would be collected and managed behind the rip rap instead of running loose across the shoreline.
Behind the rip rap itself, NEC installed a full drainage collection system designed to let water infiltrate into the ground rather than sit on the surface or wash back out toward the lake. A curtain drain was added as part of that system, a technique that increases the ground's water-holding capacity and captures surface runoff before it can undermine the shoreline. Property owners weighing similar shoreline work can review the trade-offs involved in this approach on our page covering the Shoreline Stabilization process.
Stabilized Shoreline Protects Long Lake Property
With the slope flattened and the rip rap in place, the shoreline is now positioned to resist the wave action that was previously carrying sand away. The stone holds its position because the weight and placement are built to withstand moving water rather than shift with it.
The drainage work behind the rip rap addresses the part of the problem that stone alone could not solve. By rerouting the downspout drain tile and adding the curtain drain, water now moves into the ground instead of collecting behind the shoreline, which supports the long-term stability of the entire system.
Get Shoreline Help in Long Lake
We work with lakefront homeowners across the Minnetonka and Wayzata area on erosion control and drainage problems like the one addressed at this Long Lake property. Every shoreline behaves differently depending on slope, soil, and wave exposure, so we evaluate each site before recommending a fix.
Dealing with beach erosion or drainage issues on your own Long Lake shoreline? Reach out and we can take a look.
Frequently Asked Questions
What causes shoreline erosion on Long Lake, MN properties?
Wave action against an unprotected or steeply sloped beach is a common cause, and it is often made worse by poor drainage behind the shoreline. On this Long Lake project, both factors were addressed together by flattening the slope and adding a dedicated drainage system.
Why install drainage behind rip rap instead of just placing stone?
Rip rap alone protects against wave action, but it does not manage water moving through the ground behind it. Adding a drainage collection system and curtain drain lets water infiltrate the ground instead of saturating the soil behind the stone, which supports the shoreline's long-term stability.
Does rerouting downspout drain tile require ongoing maintenance?
Once downspout drain tile is properly rerouted and tied into a drainage collection system, it typically requires little upkeep beyond periodic inspection to confirm the outlets remain clear. Homeowners considering broader erosion control options can also review our guide on Erosion Control Methods.