Sediment Barrier
Ninety7 wattles are designed to control storm-water runoff by slowing it down and preventing sediment from entering waterways. They can be used in both temporary and permanent applications, depending on the project needs.
For temporary installations, the wattles help manage storm-water during construction or other short-term activities. They can be removed once the project is completed with minimal disturbance to the soil.
For permanent installations, the wattles can remain in place long-term, offering continued filtration and protection, and support new vegetation upon decomposition. However, removal of wattles in permanent settings should be handled carefully, as they may cause soil disturbance and potentially disrupt the erosion control they provide.
Proper installation is crucial to ensure Ninety7 wattles function effectively. Key steps include ensuring they are placed securely across slopes or drainage paths and ensuring they fit the specific needs of the site.
Ninety7 wattles are designed to control storm-water runoff by slowing it down and preventing sediment from entering waterways. They can be used in both temporary and permanent applications, depending on the project needs.
For temporary installations, the wattles help manage storm-water during construction or other short-term activities. They can be removed once the project is completed with minimal disturbance to the soil.
For permanent installations, the wattles can remain in place long-term, offering continued filtration and protection, and support new vegetation upon decomposition. However, removal of wattles in permanent settings should be handled carefully, as they may cause soil disturbance and potentially disrupt the erosion control they provide.
Proper installation is crucial to ensure Ninety7 wattles function effectively. Key steps include ensuring they are placed securely across slopes or drainage paths and ensuring they fit the specific needs of the site.
Inlet Protection
Ninety7 wattles used in inlet protection applications are designed to filter and slow storm-water before it enters drainage systems such as storm drains, culverts, or catch basins. Their primary purpose is to prevent sediment, debris, and pollutants from entering these drainage systems, which can cause blockages or contamination of water quality in downstream areas.
Key Features of Ninety7 Wattles in Inlet Protection:
Proper Installation Considerations:
Ninety7 wattles used in inlet protection applications are designed to filter and slow storm-water before it enters drainage systems such as storm drains, culverts, or catch basins. Their primary purpose is to prevent sediment, debris, and pollutants from entering these drainage systems, which can cause blockages or contamination of water quality in downstream areas.
Key Features of Ninety7 Wattles in Inlet Protection:
- Sediment Filtration: Ninety7 wattles act as a physical barrier, capturing sediment and other particulates from storm-water runoff, allowing cleaner water to flow into the storm-water system.
- Water Flow Management: They slow the flow of water as it approaches the inlet, giving time for sediment and other pollutants to settle out or be filtered by the wattle material.
- Easy Installation and Flexibility: Ninety7 wattles can be placed around or across the inlet to provide immediate protection. They are easy to install and can be adjusted to fit different sizes and types of inlets.
- Erosion Control: By trapping sediment, wattles help prevent erosion and debris from entering the inlets.
Proper Installation Considerations:
- Correct Positioning: Ensure wattles are positioned to fully encircle the inlet or across the flow path in a way that maximizes their ability to filter water.
- Secure Attachment: Ninety7 wattles should be securely anchored to prevent displacement during high flow events using stakes or sandbags.
- Regular Maintenance: Check the wattles regularly for signs of clogging or damage, especially after heavy rainfall. If necessary, remove sediment buildup and replace unraveling wattles to maintain effectiveness.
Check Dam
In check dam applications, Ninety7 wattles play a critical role in reducing the velocity of concentrated storm-water flows in open channels. By doing so, they facilitate infiltration into the ground as close to the point of origin as possible. This is important for preventing downstream erosion and promoting the absorption of water into the soil, which is essential for maintaining the health of the land.
Key Benefits of Ninety7 Wattles in Check Dam Applications:
Installation Considerations:
In check dam applications, Ninety7 wattles play a critical role in reducing the velocity of concentrated storm-water flows in open channels. By doing so, they facilitate infiltration into the ground as close to the point of origin as possible. This is important for preventing downstream erosion and promoting the absorption of water into the soil, which is essential for maintaining the health of the land.
Key Benefits of Ninety7 Wattles in Check Dam Applications:
- Velocity Reduction: Ninety7 wattles slow the flow of concentrated storm-water, which helps reduce the energy of the water and minimizes erosion along the channel. This slowing of water allows sediment to settle and infiltrate into the ground more effectively.
- Promoting Infiltration: By reducing the flow rate, the wattles enhance the opportunity for water to percolate into the soil. This is particularly valuable in areas where groundwater recharge is a priority or where surface runoff might otherwise contribute to erosion.
- Optimized Performance with Check Dams: Ninety7 wattles perform most effectively when the impoundment pools (the water retained behind the check dam) accumulate and extend up to the downstream face of the preceding check dam. This positioning ensures that water is trapped efficiently, and the process of infiltration is maximized as the water flows through the series of check dams and wattles.
- Erosion Control: The placement of wattles before and around check dams prevents the scouring of the stream bed or channel, particularly in areas of concentrated flow. This helps maintain the integrity of the channel and protects surrounding vegetation and infrastructure.
Installation Considerations:
- Proper Placement: Ninety7 wattles should be positioned in areas of concentrated flow where storm-water runoff is most likely to cause erosion or sediment transport.
- Alignment with Check Dams: The efficiency of the wattles increases when they are aligned with the check dam’s impoundment pool. This alignment allows the water to accumulate behind the dam and slowly infiltrate, maximizing soil stabilization and preventing flooding.
- Maintenance and Monitoring: Regular maintenance is important to ensure the wattles remain intact and functional. Sediment buildup may need to be cleared, and damaged wattles should be replaced to ensure continued performance.
Environmentally Sensitive Areas
In environmentally sensitive areas such as slopes, stream banks, and wetlands, where wildlife habitats are threatened and soil erosion is a concern, Ninety7 wattles provide a natural, effective solution for erosion control and vegetation establishment.
Key Benefits of Ninety7 Wattles in Environmentally Sensitive Areas:
Installation Considerations for Sensitive Areas:
In environmentally sensitive areas such as slopes, stream banks, and wetlands, where wildlife habitats are threatened and soil erosion is a concern, Ninety7 wattles provide a natural, effective solution for erosion control and vegetation establishment.
Key Benefits of Ninety7 Wattles in Environmentally Sensitive Areas:
- Soil Stabilization: Ninety7 wattles are excellent at stabilizing soil in areas that are prone to erosion. By slowing the movement of water and reducing the velocity of storm-water runoff, they prevent soil from being washed away, which is critical in protecting delicate ecosystems.
- Wildlife Protection: Erosion control is crucial in maintaining wildlife habitats, especially along stream banks, wetlands, and slopes where many species rely on stable land and water conditions. Ninety7 wattles help maintain these habitats by preventing the degradation of the environment due to soil erosion and water runoff.
- Facilitating Vegetation Growth: By reducing erosion and improving soil moisture retention, Ninety7 wattles create a better environment for the growth of native vegetation. This helps to restore or enhance vegetation in sensitive areas, providing food and shelter for wildlife while improving overall ecosystem health.
- Natural Materials: Made from natural, biodegradable materials, Ninety7 wattles blend well into the environment and pose no harm to wildlife. Over time, they break down, leaving no long-term environmental impact, and support the natural regeneration of the area.
- Water Quality Protection: In areas such as wetlands or stream banks, protecting water quality is essential. Ninety7 wattles filter and trap sediment before it can flow into water bodies, preventing contamination and maintaining the health of aquatic ecosystems.
- Reduced Habitat Disruption: Using Ninety7 wattles instead of more invasive erosion control methods (like hard structures) reduces the risk of disrupting natural habitats. Their natural, flexible design allows for minimal disturbance to the surrounding environment.
Installation Considerations for Sensitive Areas:
- Strategic Placement: Ninety7 wattles should be placed in a way that targets the most vulnerable areas of erosion, such as the base of slopes, along stream banks, and in wetland buffers. Positioning them at key erosion-prone points can significantly reduce soil loss.
- Non-Intrusive Application: Ensure that the Ninety7 wattles are installed in a manner that does not disturb local wildlife or vegetation. In sensitive areas, it's best to use staking anchor methods that allow for easy installation and removal (if necessary) without causing damage to the surrounding ecosystem.
- Ongoing Monitoring and Maintenance: Regularly check the wattles for effectiveness, especially after heavy rainfall, and clear out sediment buildup if necessary. This ensures the wattles continue to function as intended, providing ongoing protection to the environment as they decompose and blend seamlessly into the natural landscape.
Installation Guidelines
The following should be considered when installing Ninety7 wattles:
Ground Preparation
To ensure proper contact with the ground, remove any rocks and debris from the desired area of installation and smooth it as much as possible.
Down slope Spacing
Slope gradient and soil type should determine the vertical spacing of Ninety7 wattles for slope installations.
Staking
To ensure intimate contact with the ground, Ninety7 wattles are anchored with wooden stakes or sandbags, or a combination of the two.
For installations along sidewalks and at curb inlets, sandbags and blocks can be used to anchor the wattles. The concrete blocks can be stacked to ensure enough clearance between the Ninety7 wattle and the edge of the grate inlet. Stakes should be of minimum classification of 2”x2”, and not less than 36” long.
The following should be considered when installing Ninety7 wattles:
- Ground preparation
- Proper spacing between the wattles
- Proper staking
Ground Preparation
To ensure proper contact with the ground, remove any rocks and debris from the desired area of installation and smooth it as much as possible.
Down slope Spacing
Slope gradient and soil type should determine the vertical spacing of Ninety7 wattles for slope installations.
- For gentle slopes of <20%, the vertical spacing should be fifty feet apart.
- For moderate slopes of 20% to 35%, vertical spacing should be thirty feet apart.
- For steep slopes of 35% to 45%, vertical spacing should be twenty feet apart.
- For soft, loamy soils, rows can be closer together.
- For hard, rocky soils, rows can be further apart.
- Ninety7 wattles are not recommended for use on slopes above 45%.
Staking
To ensure intimate contact with the ground, Ninety7 wattles are anchored with wooden stakes or sandbags, or a combination of the two.
For installations along sidewalks and at curb inlets, sandbags and blocks can be used to anchor the wattles. The concrete blocks can be stacked to ensure enough clearance between the Ninety7 wattle and the edge of the grate inlet. Stakes should be of minimum classification of 2”x2”, and not less than 36” long.
Method
Proper installation and maintenance of the Ninety7 wattle help capture sediment on the up-slope side.
Proper installation and maintenance of the Ninety7 wattle help capture sediment on the up-slope side.
- Prepare the area of installation per project specifications.
- Start installing Ninety7 wattles from the bottom of the slope and work up.
- Firmly place the Ninety7 wattle in the desired area, perpendicular to flow with ends curled slightly upstream to prevent higher velocity water from going around the ends. In cases of curb inlet, place the wattle parallel to curb inlets and anchor securely. Snake the wattle around square drop inlets, ensuring the ends overlap and are secured in place. Use more than one wattle if needed.
- Drive the wooden stakes securely through the handles and into the ground until 2”- 3” of stakes remain exposed. To avoid compromising the integrity of the Ninety7 wattle, do not pierce its body.
- If more than one Ninety7 wattle is placed in a row, a 12” overlap should be allowed. Ninety7 wattles should not be abutted.
Maintenance
- Inspect the Ninety7 wattles as required by project specifications and following rainfall events. Repair or replace split, torn, unraveling, or slumping wattles.
- Maintain the Ninety7 wattles to provide an adequate sediment holding capacity. Sediment should be periodically removed and incorporated in the project to blend in with adjacent ground when it accumulates to three-quarters (3/4) of the Ninety7 wattles height.
Removal after Temporary Use
- Sediment barrier installations of Ninety7 wattles should only be removed when up gradient areas are stabilized.
- Collect and dispose of the accumulated sediment.
- Fill and compact depressions and any other ground disturbance.
- Manufacturer encourages repurposing used Ninety7 wattles to make mulch.