Septic System Designs

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An Innovative Approach to Septic System Designs

When municipal sanitary sewer service is not available, a septic system is needed. NexGen offers choices in what kind of system you may use, from the type of tank to the type of leach field. Choices can be based on what type of septic system you may want to have, such as an aerobic tank or leach field chambers, and in other situations some options may be chosen because of water table height or unsuitability of soil on the site. Whatever the situation, we will use innovative approaches to engineering to find your septic system design solution.

One approach to water treatment that can be used is the conventional septic tank. This method uses anaerobic bacteria (bacteria that do not need air) to break down the solids and other waste that enters the tank. As the waste is broken down by the natural bacteria, it becomes wastewater. A conventional septic tank has three levels: the bottom layer that has heavy solids, the middle layer that is filled with wastewater, or effluent, that is treated and flows into the leach field, and the top layer with lighter solids and grease that is also broken down by anaerobic bacteria. This system works on gravity and provides only primary treatment.

Looking into Alternative Septic System Designs

There are also alternative septic system designs. These solutions produce less environmental waste than conventional systems. NexGen has a solution called an aerobic tank. In this system, waste flows into the tank, and air is forced into the chamber with the waste by pumps. The bacteria present in the air (aerobic bacteria) break down the solids. They are further broken down than they are in a conventional system. Effluent flows out and into the leach field. This level of treatment is considered secondary treatment, and compared to a conventional septic tank, it’s faster.

Using Sand as a Filter in Septic System Design

Another possibility in alternative septic systems is the mound septic system design. This is typically used when the water table is close to the surface of the ground or if the soil is inappropriate for a typical leach field. A mound of sand is built by NexGen with earth-moving equipment in the location of the leach field. Electrical pumps force wastewater into the mound. Once in the sand mound, the wastewater filters down, leaving impurities behind. This creates more distance between the effluent and the groundwater and allows the effluent to purify to an acceptable level before it reaches the water table.

Sand is an effective filter in septic system designs and can be used in achieving sustainability goals. One possible design is the sand filter septic system design, where wastewater is sent through a sand filter. The wastewater is then dispersed into the leach field. NexGen creates recirculating sand system designs that allow for more treatment of effluent before it reaches the leach field. A loop is placed in the system to make the wastewater run back through the sand filter once more before being sent to the leach field.

Septic System Design and Leach Fields

There are also choices in leach fields today. There is always the conventional option of pipes in the soil, which has been used for so long. With new technology in leach field chambers, NexGen is optimizing water resources through water recycling. In some areas these are able to be used and simplify the leach field construction process. Both work with gravity.

A conventional leach field is simple. A line is run from the septic tank into a network of pipes that lie in gravel-lined trenches in the ground. Effluent flows into these pipes. The pipes have small holes drilled in their sides and bottoms. There are helpful bacteria in the pipes. As the effluent slowly seeps out of these pipes and down into the ground, it is cleaned. Impurities are trapped in the soil beneath the pipes as the water flows away. The treated water is absorbed by the roots of plants, is evaporated by the sun above, or moves down to join the ground water.

The Advanced Enviro-Septic Treatment System

Drain chambers, or leach chambers, are a newer way of constructing leach fields in septic system designs. Systems such as the Advanced Enviro-Septic (AES) Treatment System clean 99% of contaminants out of wastewater. NexGen is an AES Dealer. They hold more wastewater and make the footprint of the leach field smaller. Because no gravel is needed, earth-moving equipment is not necessary. They are low maintenance, don’t require pumps or other mechanical devices, or additives.

Much like a conventional leach field, wastewater flows into the chambers. The short, wide, flexible chambers have louvers on their sides (like the holes in the pipes) that the wastewater seeps out of. The chambers are surrounded with geotextile material. In this septic system design, there are beneficial bacteria in the chambers, as there are in the conventional pipes, only many, many more.

Leach Field Design and Soil Testing

With septic system design, a leach field must be designed as part of the system. That leach field design factors in things like usage of a building, be it commercial or residential, number of occupants in the building, and a perc test. A perc, or percolation test, is when a hole is dug to a specified depth where the water table is at least two feet below the ground’s surface. Water is poured into the hole and the rate at which the water drops back down to its original level is its percolation rate.

A leach field’s size is directly proportional to the amount of wastewater that the home or business produces. It is also directly inversely proportional to how porous the soil is at the site of the leach field. A pump may be used with a leach field, such as in the case of a sand mound septic system design. To even out the flow to the field, siphons and other such devices are occasionally used. In these cases, the leach field lasts longer because premature clogging and bio-clogging are prevented in the system.

Rebuilding After Disaster

When a septic field fails, there is no choice but to dig a new one. NexGen is there with a better, up-to-date design, getting you back on top. Likewise, when you need a new, more effective septic tank, contact us for your septic system designs.

What Is Stormwater Management?

We all know that water falls from the sky in some form when it storms. But what, exactly, is stormwater? It’s the runoff from paved and other impenetrable surfaces that contributes to negative consequences for lakes, rivers, streams, and reservoirs. NexGen works to control the runoff of precipitation to help us maintain the quality of our environment and the natural resources around us. Controlling this runoff is called stormwater management, and there are several ways to do this. First, we need to understand exactly why we must keep stormwater from inundating our environment. This helps people understand why everyone, even developers and builders, are responsible for stormwater management.

Our waterways are our precious resources. Stormwater management keeps environmental waste from getting into our waterways. It can cost a lot of money in lawsuits and damages that need to be paid because pollutants are carried into rivers and streams. These bodies of water will need to be cleaned up, which costs even more. Then there are payments for property damages, loss of life, and water quality issues that can come from an increase in stormwater. Rebuilding after disaster is dismaying. Stormwater management is an issue that is crucial for the health and safety of every individual in the community.

What, Exactly, Is the Purpose of Stormwater Management?

Minimizing stormwater damage can be done by controlling the runoff of precipitation from any surfaces that might be impervious to water. Examples of these types of surfaces include roofs and roads. It is NexGen’s aim to keep stormwater from inundating the soil and doing damage, and things like catch basins and storm sewer pipes will contain and move the runoff to the areas where it can be safely released with as little harm to the environment as possible. NexGen knows that doing this reduces the flooding of streams, keeps rainwater from flooding adjacent properties, and reduces most damages to utilities and roads.

Stormwater management also keeps dangerous pollutants from running off of the roads, into the soil, and damaging the ecosystem. It keeps the pollution in runoff from getting to local waterways, avoids flooding, and keeps sediment from shifting because of floods. Stormwater, when not controlled, can cause the runoff of soil nutrients, and organic matter is displaced. Bacteria, oil and grease, toxins, and heavy metals are sent into the environment, which is not equipped to deal with these things.

Stormwater Best Management Practices

What options do we have to deal with the issues caused by stormwater? With stormwater best management practices, or BMP’s, we can get a handle on stormwater management.

With non-structural BMP’s there is a focus on the best use of the land through planning and design. This method seeks to reduce and prevent stormwater. NexGen can protect the sensitive areas by finding and mapping out the wetlands, floodplains, and vernal pools. Areas of development need to be recognized, as well as sensitive areas. There is natural drainage already in place in these areas. We can use those natural drainage systems to keep these areas from being disturbed very much.

There are also structural BMP’s. These are projects that are constructed as part of a developed project. Due to their nature, they have to be engineered and designed to work properly. NexGen uses methods that successfully use the contours of the site, the types of soils, vegetation that might be present, and existing geology that might help with sustainability goals.

There are three methods of structural BMP’s:

  • Infiltration
  • Restoration
  • Control

How Does Infiltration Work?

The stormwater BMP of infiltration uses surfaces that can allow water to permeate down into the ground. Through an innovative approach to engineering, there are different porous surfaces that can be used such as asphalt or concrete that has a coarse aggregate, such as stone, underneath it. Another infiltration possibility is the detention pond, which holds large amounts of storm water.  The ponds have layers of aggregate that filter the stormwater beneath them, and allow runoff to percolate back into the groundwater below the pond. NexGen uses same basic principle in beds and trenches as well. They use underground piping. This pipe is perforated with small holes that allow water to seep through into the ground as it moves along the length of the pipe. Around the pipe is aggregate, such as gravel, surrounded by geotextile fabric that encapsulates the pipe. Using this form of water treatment allows the water to be recycled.

What Is Restoration?

Restoration as a BMP is quite effective and visually appealing. This is restoring the land and natural areas, especially around rivers, streams, and lake shores. When a construction project is going on, development can stretch right up to the edges of these bodies of water. NexGen knows simply by planting a natural buffer around these areas can serve as a barrier that protects these lakes and streams from harmful pollutants such as toxins, heavy metals, and oil and grease. Restoration doesn’t just need to be practiced near bodies of water, either. Any natural area that is worn away can be restored to withstand the dangerous pollution that stormwater brings.

What Are Some Examples of Control?

Control is the stormwater BMP that focuses on not allowing stormwater to become dangerous runoff in the first place. It’s about optimizing water resources through water recycling. One form of this is taking rain barrels and placing them under a drain spout. Later, after it rains, there are many options for the water. It can be used for watering plants, washing cars, washing windows, watering a garden, watering the lawn, and other outside applications. When talking about control as a BMP, an option NexGen can use is a planted roof. In a situation like this, a waterproof membrane is spread across a roof. Soil is then placed on top of the membrane and seeded. These planted roofs can become quite complex. They can have their own stormwater management in case there is a large rain event. But they are beautiful and serve a great purpose: to use the water that would normally become runoff.

Stormwater Management is important to every development. Unchecked, stormwater damages the environment around us. Through stormwater best management practices, NexGen will work to make your development safer and cleaner.

Water and Sewer Studies

With many years of experience in optimizing water resources through water recycling, NexGen is providing innovative approaches to engineering. We bring together the engineering, research, and design in our water and sewer studies to provide the information our clients need to get their projects going the way they want to.

How NexGen Works With Our Clients

Our qualified team stays in touch with our clients every step of the way, so our clients can better plan the phases of their development. NexGen is knowledgeable in planning and is capable of completing large, complex municipal infrastructure projects. This includes new construction and repair projects.

Our clients bring us challenging projects. We seamlessly unite with our clients’ development personnel team to make the project flow completely smoothly from the very beginning to the end. We work together with our clients, staying in communication, so our clients always know what phase we are in with our engineering and design. NexGen prepares our clients’ water and sewer studies for review by local municipal authorities.

Why Should We Do A Water and Sewer Study?

NexGen provides water and sewer studies that show whether the existing water and sewer utilities can accommodate the impact of a new development. Our clients want their new developments to be well-served by their utilities. The water pressure shouldn’t be low. The capabilities of the utilities need to be known for certain.

Our water and sewer studies will show if the system that our client’s development is connecting to will need updating. We’ll show if the system has the ability to support our client’s proposed project and make sure the water and sewer utilities are adequate for the needs of their customers as well as the existing customers and will provide enough water in the case of a fire event too.

What Information Do I Need in A Water and Sewer Study?

The following criteria are among the required items for a water and sewer study to a municipal authority:

  • A site plan with a listing of the land usage for the project. Some land uses are as follows: residential, commercial, right-of-way, open space, etc.
  • The number of units if the development is for dwelling units, or commercial spaces that are on the site plan
  • The proposed points of connection to the existing water and sewer lines
  • The fire flow requirements from the fire department once they have reviewed the plans

What Do Water and Sewer Studies Tell Us?

NexGen knows that water and sewer utilities are an important part of our daily life. They help us reach sustainability goals. We need clean water for drinking, bathing, cooking, and washing clothes, among other things. Most of the water and sewer systems in this area were built fifty years or more ago, when there was less demand on the systems, and they have not been updated since then.

Our studies will determine what any new development will need from these systems. No upgrades may be necessary. If there are, then larger water or water treatment pipes may need to be installed. Perhaps a pump would need to be upsized, or the pumps at the pump stations added to, or water storage tanks need to be added.

There is time and cost involved, but water and sewer studies are crucial and are also required by the local municipalities. If there isn’t enough capacity to handle your new development, there may be problems, such as environmental waste spills or no water available. NexGen wants their clients’ projects to succeed. That’s why we offer water and sewer studies of the caliber we provide.

What’s Involved in A Water Analysis?

NexGen looks at a lot of factors when doing a water analysis. We first take a look at the existing water distribution system and pump station on the water line the development will be connecting to. Next, we scrutinize the requirement of water storage that is necessary for the development that the client has proposed. The water analysis focuses on the proposed connection point for the project and evaluates whether or not the system has any kind of deficiencies or if any elements of the system may need to be improved. This is how we determine if the proposed development can be served by the municipality’s water system.

What’s Involved in A Sewer Analysis?

Like in a water analysis, NexGen has numerous things to focus on in a sewer analysis. We start by reviewing the water treatment facility downstream. We’re looking to see if it can take the impact of the proposed project. Next, we look at the proposed connection point, or points, and analyze whether or not that system is presently able to withstand the impact of the client’s proposed development. This system may need improvements before the project can be connected to the municipality’s sewer system. This report determines that and is part of the necessary permitting process.

Is NexGen the Right Company to Do Our Water and Sewer Analysis?

Through NexGen’s commitment to quality, our clients can be certain that they have all the information they need for their project. We leave no stone unturned, and our water and sewer studies are precise. Our clients are taken care of. With our years of experience in the wastewater treatment business, we are experienced and ready to create your project’s water and sewer study to your satisfaction.

Our clients have come to expect superior service from us and we don’t disappoint. It’s one of the things we excel at. Our team is a leading provider of excellence in civil engineering services. Without their teamwork, we wouldn’t be able to work on and complete our projects. We rely on the talents, strengths, and efforts of all our team members to put our customers on top. We give the best customer support from day one until the project’s end.

Entitlements and Due Diligence

NexGen has almost 30 years of experience in the land development and water treatment field. We take our clients through the entitlements and due diligence process. We have experience with this process, and are highly qualified to do it. NexGen stays in communication throughout the process to keep our clients moving forward, so that they can then better plan the development phases of their projects.

What Is Due Diligence?

Due diligence is a rational thing to do when an entity is serious about buying or signing an agreement on a piece of property for a new development. It’s a process of discovering everything about that property that could possibly help or hinder that project; it’s finding out the pros and cons of acquiring it for the entity’s planned use.

Our clients know that they want NexGen and our available resources to do the work in finding out what affects development on that property as soon as possible, so they can make the decision to acquire and get started developing or look for a more suitable location for their development. In the entitlements and due diligence process, we arm our clients with the tools they need to get ahead.

What Are Some of the Things You Find Out in Due Diligence?

When doing a client’s due diligence, the client needs to know certain things about the property. It’s important to know where they stand with the property and development issues as early as possible. Before any agreements are signed, our clients want to find out what they need to know so they will know what they can expect. Doing due diligence saves time and money.

Some of the things our clients want to find out when we do their due diligence are:

  • What is the property zoned for?
  • What’s the permitting process for the municipality?
  • How long does the permitting process take?
  • How much are the fees?
  • What other design or construction issues will impact budget and time?

We at NexGen find out what the property is zoned and whether or not the proposed development’s use will fit in that zoning. We discover what, if any, conditional use permits may be required by the city, and if any zoning variances will be required during permitting.

NexGen finds out and makes our clients aware of things like:

  • Adjacent streets, any sidewalks, curb and gutter, medians, and alleys
  • Adjacent businesses and their features
  • The contours of the existing land and the drainage of the site and properties adjacent to it
  • Floodplains, existing wetlands, endangered species restrictions conservancy districts
  • Setbacks, right-of-way, and easements
  • Utility requirements
  • Other issues related to the project that may need engineering solutions

What is Entitlement?

Occasionally, zoning and entitlement are mistaken for the same thing. They are not, exactly. Zoning, itself, is a part of entitlement. In zoning, the land is split into zones. The zoning codes state what the land in these zones can be used for. Entitlement is defined as a permit from the local government to develop land in the way that the owner desires.

What Do I Have to Go Through to Be Considered for Entitlement?

Before the government will grant entitlement, it considers numerous factors. The impact on local traffic, the risk to the environment, and the response from the community are a few examples we can list here. Getting the government to grant entitlement is a long and time-consuming process. Unfortunately, without it, you won’t be able to develop the land.

Following are a few examples of entitlement:

  • A piece of property that an owner wants to develop may be zoned for a specific use. If this is not the owner’s planned use, he or she can then apply for rezoning. This is a long and complicated process, and it doesn’t always work out in the owner’s favor.
  • Zoning variances. This is a change in the zoning requirements, perhaps it’s a difference in the number of required parking spaces, the required building height, or the required setback from property lines.
  • Conditional Use permits. This is a permit that is given contingent on a special or desirable use of the property.
  • Utility approvals. There may not be utilities available at the site at this point. An approval will need to be granted before they can be installed on the property. Be aware: some of the land may have to be donated to the city when doing this.
  • One may have to have his or her landscaping approved by the city.
  • Road approvals. If there are no roads that connect to the site, the developer will have to build them. An entitlement will be needed to do this. This is a situation where easements and access need to be considered.

Why Should NexGen Do Your Entitlements and Due Diligence?

Our clients want NexGen to seek out their entitlements. This is because we negotiate the maze of city, county, and state permitting boards that need to be contacted. These three entities don’t always communicate with one another, so our clients want us to stay on top of the process to make sure that all the loose ends are tied. NexGen already has working relationships with the planners on the boards and it’s easier for us to use these connections to our benefit.

About NexGen and Our Clients

By using innovative approaches to engineering, NexGen meets their clients’ goals. We have been achieving sustainability goals by optimizing water resources through water recycling and coming up with solutions to combat environmental waste. We help with rebuilding after disaster. With almost 30 years of experience, NexGen is committed to quality performance on every job, no matter how big or small, and maintaining a safe environment with a planned course of action. Regardless of whether the job is for government, commercial, or residential entities, our consistently superior customer service speaks for itself.

NexGen: Excellence in Soil Testing in Northern California

With NexGen doing their soil testing, our clients can be sure that they are getting clear, true results. They know whether the soil on their property is suitable for their proposed development. This is one of the first steps that should be done before any design starts. The soil under a structure takes a lot of stress. It needs to be tested to make sure that it will be able to support a building. No one wants to be rebuilding after disaster when their structure collapses or is damaged because of unsuitable soil.

Types of Soil Testing

There are different types of soil tests that NexGen can complete to check soil quality. The properties of the soil determine which type of test is the one that is done. Soil testing is done in the lab and in the field. Incidentally, a structure’s foundation design is determined by the results of the soil test report.

The five most common soil tests that NexGen does for new construction are as follows:

  • Moisture Content
  • Specific Gravity of Soil
  • Compaction (The Proctor Test)
  • Dry Density of Soil
  • Atterberg Limits Testing

Moisture Content Test. When NexGen does moisture content soil testing, we are checking for the water content in the soil. This is important to know because if there’s too much or too little, the soil won’t support a structure properly.

There are numerous methods of determining water content in the soil, but the most common and accurate method of moisture content testing is the oven drying method. In this method, a soil sample is taken from the site, weighed, and placed in an oven. It is dried at 110°C. After 24 hours has passed, the soil is removed from the oven and then it is weighed. The difference in the weight after it has dried in the oven is then notated.

Specific Gravity of Soil Test. This is a test NexGen does to determine the ratio of soil density to water density.

The most simple and common tests for specific gravity are the density bottle method and the Pycnometer method. We will look at the Pycnometer method here. The pycnometer is measured 4 times, each with a different weight variable. First is empty weight, then empty + dry soil weight, next, empty + dry soil + water, and finally, the Pycnometer filled with water. A mathematical formula using these four masses is used to compute gravity.

Compaction Soil Test (The Proctor Test). The Proctor test is done by NexGen to find out the compaction characteristics of soil. The amount of compaction is measured by dry soil density. Reducing the air voids in the soil by densification creates compaction.

For this soil test, the soil is sent through a large and a smaller sieve. The amounts that pass through and are retained on the small sieve are mixed in a specific proportion. Water is added to the mixture, and it is then left in an air-tight container for 20 hours. After the 20 hours is up, the soil is taken out, mixed, and then divided into parts. One of the parts of the soil is poured into a mold and pressure is applied to the soil sample. The soil sample and mold are weighed. A portion of the sample is taken and a water content test is conducted. The optimal moisture content is measured when the soil at its most dense state and it has achieved its maximum dry density.

Dry Density Test. The weight of the particles of soil in the given volume of a sample is known as the dry density of the soil. Specific gravity and void ratio affect dry density. Soil is classified as loose, medium-dense, and dense.

The method NexGen uses to determine dry density when doing soil testing is the core cutter method. It’s called that because a cylinder called a core cutter slices a sample, or core, out of the soil. The core cutter is then lifted up out of the soil with the sample still inside. The soil sample is then taken out of the core cutter and weighed. The water content is established through testing and dry density is calculated.

Atterberg Limits Testing. NexGen knows soil can be in four states: solid, semi-solid, liquid, and plastic. Which state the soil is in depends on the water content of the soil. A Swedish scientist, Albert Atterberg, defined limits of soil consistency in fine grained soils. These methods are still used in determining liquid limit, plastic limit, and shrinkage limit of soil. These three limits determine the properties of fine-grained soils. In these three tests, the fine-grained soil is tested, and critical water content is measured.

  • Liquid limit. A cup with a mechanism that moves up and down, known as a Casagrande’s liquid limit device, is used to discover the liquid limit of the soil.
  • Plastic limit. A soil sample is taken, has water added to it, and develops plasticity. After the soil is made plastic, it is shaped into a ball and put onto a glass plate. The ball is rolled into small pieces that each measure a diameter of 3mm. If these pieces don’t break, the process is done again and again with less water each time, until the small pieces break, to determine the limits of plasticity in the soil sample.
  • Shrinkage limit. This method of testing employs a mathematical formula to find out how much water is needed to fill all of the voids in the soil sample.

Soil testing is crucial to our clients’ projects; that’s why they rely on us. With NexGen’s almost 30 years in the construction industry, we’re applying innovative approaches to engineering. Our goal is our clients’ satisfaction, and we reach that with our experience and our commitment to quality work and safety practices.

NexGen: Using Innovative Approaches to Engineering in Grading and Drainage Design

With development happening at an ever-increasing rate, grading and drainage design is a focus for NexGen and our clients. Controlling the flow of drainage is our goal in these endeavors to manage erosion, flooding and other runoff issues. NexGen is using innovative approaches to engineering to meet their clients’ grading and drainage design goals.

When NexGen produces a grading and drainage design plan, we take the existing form of a piece of property and transform the contours, or the elevation lines, of the property. This controls how stormwater drains off the land. These new contours and drainage designs work with the proposed design, so the shape of the land fits the need of what has been planned.

NexGen wants rain water runoff to flow away from buildings, walkways, roads, and parking lots into storm drains. This flow follows the swale, or direction of drainage. When looking at grading and drainage design plans, it is easy to look for an arrow, which indicates the swale. Water drainage is always at right angles to the contours. It will follow the steepest, or easiest, route downhill.

How Do I Read Contour Lines?

Contour lines on grading and drainage design plans are imaginary lines that show points of equal elevation. This elevation is relative to a known elevation, which is usually sea level, or 0’. When looking at the plan, NexGen indicates existing contours with dashed lines. All proposed contours are usually shown as solid lines and will connect to the existing contours. 5’ and 10’ contour elevations are often represented with a darker line.

When NexGen’s clients see a proposed contour, they know it shows the location of a change from the existing form of the land. If the proposed contour is a lower elevation than the existing contour, the earth is “cut” away. If the proposed contour is higher, this is referred to as “fill.” To make large level areas for parking lots and buildings, earth has to be cut or filled in. Sometimes, a little of both cutting and filling has to be done.

If our clients are looking at contours on a grading and drainage design plan, the contour elevation, or number indicating the contour’s height above sea level, is positioned on the high side of the contour. Contours that have a bend pointing uphill show a valley. If the contours are pointing downhill, they are indicating a ridge in the features of the land.

Sometimes NexGen indicates features on grading and drainage design plans that look similar to concentric circles. These are depressions or summits. A depression in the land is shown by contours with elevations decreasing as the contours move inward. If the contours decrease as they move outward, they show a summit.

What Are Spot Elevations?

When contours don’t show enough elevation information, or there is information about specific features between contours, NexGen uses spot elevations. A high point, for example, may need to be called out. Spot elevations look like an elevation with two decimal places beside what is typically an “X” shape, depending on the CAD standards used in the drawing.

What Is the Difference Between Profiles and Sections?

NexGen uses profiles and sections with grading and drainage design plans to show a perpendicular cross-section of an area on the drawing, like a road, for example. A profile shows the existing and the proposed grading and drainage features of the drawing. A section, on the other hand, shows only the proposed elements of the design.

NexGen uses the drainage features in their designs to remove water from surfaces of the development, including buildings, parking lots, and drives. A storm drainage system collects, carries, and disposes of runoff from precipitation events. Runoff is only around during and immediately after the rain. However, with more buildings (roofs), parking lots, and roads than ever, there is more runoff to contend with. All of this water needs to be removed every time it rains and has to drain away from buildings, walkways, and other paved areas.

How Does NexGen Manage Drainage Design Issues?

With grading and drainage design, one way of doing this is infiltration. Water is directed into beds and trenches that are in perforated pipes. The pipes are surrounded by coarse aggregate that is encapsulated by geotextile fabric. The water seeps into the earth. This is optimizing water resources through water recycling. Detention ponds work on the same principle.

NexGen also creates drainage design elements that move runoff by gravity onto landscaped surfaces where the runoff can be absorbed back into the earth. This is how drainage design may work in a single-family residential setting. The water flows off of the roof and into the house’s gutter. It goes down through the downspout and out into the yard, where it is absorbed or runs into a ditch. The runoff can flow down to the street. The water flows down the gutter until it falls into a catch basin and joins the rest of the rain water runoff in the city’s stormwater management system.

In a private drainage system, the runoff comes off of the impermeable surfaces and follows the direction of drainage. It runs into a catch basin, or similar collection device placed at a low point. A storm drain system (of pipes) picks up the water at that point where gravity takes it on its journey (unless it encounters a pump station) until it is released in an appropriate area and manner.

NexGen – Creating Our Clients’ Grading and Drainage Design with the Cornerstones of Experience, Quality, and Safety

NexGen’s grading and drainage design is an intricate process that keeps our clients’ developments safe from flooding and erosion. We protect them from the environmental waste that runoff can spread. With our almost thirty years’ experience in the construction and water treatment industries, we are achieving sustainability goals. NexGen can help you in rebuilding after disaster. We satisfy our clients with our commitment to exercising quality work and keeping everyone secure with consistently implemented safety practices.

Trusted Partners

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