Dunnebacke Constructors
Grading · Drainage · Erosion Control · Middle TN
The driveway ran right along a creek, and the bank between them was washing out bad — open holes at the edge of the gravel, roots hanging in the air, and the ground caving toward the water. We cleaned out the eroded area, set a load of Class B riprap (stone 3 feet and below) to armor the bank, finished it with a load of Class A riprap so it looks good, and added erosion control.
Creek bank erosion almost always starts where you can't see it. Water running along the bottom of the bank carries soil away at the toe, a little at every hard rain. The ground above loses its support, roots end up holding the bank together, and eventually the soil behind them falls in and leaves a hole. By the time it shows up at the top, the bank underneath is already hollow.
That's where this one was. Right off the edge of the gravel drive there were open voids you could put a leg in, a tree's roots spanning empty space, and loose dirt sliding toward the creek. Small creeks around Nashville come up fast after a heavy storm, and every one of those events was pulling more of the bank — and getting closer to the driveway itself.
Fill dirt in a washout next to a creek just washes out again. The fix is rock big enough that moving water can't carry it off, set on a clean, solid base from the creek up to the driveway.
With a mini excavator we pulled out the loose, caved-in soil and debris from the washout so the rock would sit on firm ground instead of on material that was already moving.
We set a load of Class B riprap — stone 3 feet and below — from the creek up the face of the bank to the edge of the drive. Big, heavy, angular stone locks together and is what actually holds the bank when the creek is up and running hard.
Over the top we placed a load of smaller Class A riprap. It fills the gaps between the big stone and gives the slope a clean, even, finished look along the driveway, instead of a jumble of boulders.
Finally we added erosion control on the disturbed ground around the work, so the soil we opened up stays put until it greens back over.
The holes are gone, the bank is armored from the creek to the driveway with heavy stone that won't move in high water, and the Class A on top gives it a clean, finished edge. The driveway has solid ground beside it again instead of a slope that was disappearing a little more with every storm.
If you've got a creek, ditch, or drainage running alongside your driveway and the edge is starting to cave, it's a lot easier to fix now than after it takes part of the drive. We clean it out, armor it with the right size riprap, and finish it so it looks like it belongs there. For a bigger version of this kind of job, see our riprap channel and bridge project in Nashville, and read more on our erosion control page.
Work along a creek may need a permit depending on where you are and how much you disturb, so it's worth checking with your local codes or stormwater department before starting. We work Nashville, Madison, Goodlettsville, Old Hickory, and Hermitage, along with Hendersonville, Gallatin, and throughout Middle Tennessee. Every bank is different, so pricing depends on the job — call us and we'll come take a look and give you a free quote.
Riprap, bank stabilization, erosion control — free estimates, straight quotes.