Sediment Pond Installation

The pond was used as a sediment pond during construction of the property and once construction was completed, the pond was never scraped out and built to the plan specs.

We ended up removing 380 yards of sediment and then brought in new fill to get the pond back to the correct elevation. There should have been an infiltration trench installed in the pond but it was never installed. This pond is considered a water quality pond due to its size and then drains offsite into another detention pond. We had engineers redesign the infiltration trench since the required depth could not be met and have positive flow.

Once designs were approved for the design change, we dug out the trench, installed our geotextile and set the drain line.

We then backfilled over the pipe with #57 stone and formed a trench down the middle.

Next, we installed the riprap at the inflow structure. Then, we seeded the disturbed areas and covered with coconut fiber. Finally, we installed a silt fence around the rock bed until complete stabilization is achieved.

 

Stormwater System Repair

Sediment removal is complete. The site has been surveyed. Now, we discovered that the infiltration trench never installed. And, the pond was graded to the wrong elevation. We are bringing in new fill and using a laser to correctly grade the #pond. We have added additional #BMPs to ensure we do not have any #sediment release and our #turbidity is within compliance. Once the engineers have come up with an approved revision to the trench and low flow orifice, we will be on our way to completing this project. Stormwater systems are at the core of what we do here at DGC. Reach out to us with any questions or concerns you might have with your #stormwater #systems

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rip rap installation for sediment control of stormwater system

Erosion Control – Rip Rap to the Rescue!

Erosion is the displacement of soil by water, wind or other natural agents. The severity of the erosion is dependent on the environment, water velocity, soil type, and vegetative or other coverage.

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Most municipalities require that any erosion that occurs on a property to be repaired as quickly as possible and failure to do so could result in a Notice of Violation (NOV) which can incur fines. Erosion repairs can be expensive, so the best way to manage erosion is to prevent it.

When looking for a solution to an erosion problem, rip rap can be a cost effective option. When properly installed it can slow water velocity and offer coverage to protect venerable areas from erosion. The proper installation makes all the difference in the effectiveness of the protection the rip rap will provide. Rip rap is commonly large rock that is installed over prepared ground and secured geotextile fabric. With this method, the ground beneath the rock is stabilized and can offer years of protection from elements of erosion. Typically, rip rap is used around structures, on slopes and in high velocity areas. In addition to offering a solution for erosion issues, rip rap is esthetically pleasing.

Maintenance costs are reduced when rip rap is used around structures because the areas will be sprayed quarterly instead of trimmed monthly or bimonthly. It also reduces the cost of sediment removal because the soil is not displaced, so sediment accumulation is reduced. In one of our projects, a client was having drainage issues and it was found to be accumulated sediment in a mitered end structure. We removed the accumulated sediment and added geotextile fabric and rip rap at the end of the structure. After the repair was complete, the drainage issues were resolved.

Even though some sediment accumulation will occur within any stormwater system, the amount can be minimized with preventative measures.

Rip rap was one of the first forms of erosion control, used on the dams in the Panama Canal in the early 1900’s, so it is a tried and true method.

Contact us today for a site evaluation and erosion prevention plan.

Contact Us Today!

For a Site Evaluation and Prevention Plan