# Beef Cattle Feedlot Pen Design: Drainage, Bunk Space, and Mounds ## Key Takeaways - **Drainage Gradient and Crown:** Pens require a 2-4% slope from the bunk apron towards the rear, with a crowned center to direct water to side drainage channels, preventing pooling and maintaining dry resting areas. - **Bunk Space Allocation:** Optimal feed intake and uniform gain are achieved by providing specific bunk space per animal class: 24-30 inches for calves, 30-36 inches for yearlings, and 36-48 inches for mature cows. - **Mound Design for Dry Resting:** Mounds, elevated 3-5 feet with 4:1 to 6:1 slopes and 10-20 sq ft per cow, offer essential dry resting surfaces, mitigating mud-related health issues like foot rot and reducing maintenance energy expenditure by 15-30%. - **Concrete Aprons and Pads:** A 8-12 ft concrete apron with a 1-2% slope at the bunk and a similar pad around water tanks, both grooved for traction, are critical for preventing mud accumulation and ensuring consistent access to feed and water. - **Pen Density Impact:** Maintaining a density of 250-500 sq ft per cow is crucial; overcrowding exacerbates mud, increases disease transmission risk (e.g., bovine respiratory disease complex), and reduces average daily gain by up to 20%. --- Planning a feedlot or renovating existing pens requires decisions that will affect cattle health, labor efficiency, and operational cost for decades. This guide covers the core elements of beef cattle [feedlot pen design](/knowledge/animal-farming/beef-cattle/feedlot-pen-surface-and-drainage-design): drainage systems that keep cattle dry, bunk space calculations that ensure uniform feed intake, and mound construction that gives cattle a dry place to rest. It is written for farmers, ranch managers, and agricultural planners who are designing new facilities or improving existing ones. The guidance focuses on practical, field-tested approaches that work across the major cattle feeding regions of North America. ## At a Glance - **Pen slope**: 2 to 4 percent grade from the bunk apron to the back of the pen for proper drainage. - **Bunk space per cow**: 24 to 30 inches for calves, 30 to 36 inches for yearlings, 36 to 48 inches for mature cows. - **Mound height**: 3 to 5 feet above the surrounding pen surface, with a slope of 4:1 to 6:1. - **Mound area**: 10 to 20 square feet per cow, depending on climate and pen density. - **Pen density**: 250 to 500 square feet per cow for most feedlot settings. - **Drainage direction**: All pens should drain away from feed bunks and water tanks. - **Crown placement**: The center of the pen should be the highest point, with drainage to the sides and rear. - **Surface material**: Compacted clay or soil mix for the mound, with a roughened surface for traction. - **Water placement**: Water tanks should sit on a concrete pad with its own drainage away from the mound. - **Records to keep**: Rainfall events, mud scores, pen condition notes, and health events by pen. ## Understanding Feedlot Pen Design Fundamentals Feedlot pen design is about managing the environment cattle live in for the entire feeding period. A well designed pen keeps cattle clean, dry, and comfortable. A poorly designed pen creates mud, manure buildup, and health problems that cost money in treatment and lost gain. The three critical components of beef cattle feedlot pen design are drainage, bunk space, and mounds. These elements work together as a system. Drainage removes water and urine from the pen surface. Bunk space determines how many cattle can eat at once and how evenly feed is distributed. Mounds provide a dry resting area above the wet pen floor. When one component is wrong, the others cannot fully compensate. ### Why Pen Design Matters for Cattle Health Cattle standing in mud require more energy to maintain body temperature. Research from multiple land grant universities shows that mud can increase maintenance energy requirements by 15 to 30 percent depending on depth and temperature. This means less energy goes into gain and more goes into staying warm. In severe conditions, mud can reduce average daily gain by 20 percent or more. Foot health is directly tied to pen conditions. Cattle standing in wet, muddy conditions are more prone to foot rot, hairy heel wart, and other hoof problems. These conditions require treatment, reduce performance, and can lead to culling. Good drainage and mound design are the first line of defense against foot problems. Respiratory health also improves with better pen conditions. Cattle that are wet and cold are more susceptible to bovine respiratory disease complex. A dry place to lie down helps cattle maintain body temperature and reduces stress. The connection between pen design and respiratory disease is well established in feedlot management. ### The Cost of Poor Design Poor pen design creates hidden costs that show up in multiple ways. Manure removal becomes more difficult and expensive when pens do not drain properly. Wet manure is heavier and harder to handle. Muddy pens require more bedding, which adds cost and labor. Sick cattle require treatment, which adds veterinary and labor costs. Reduced gain means more days on feed to reach the same endpoint. A well designed pen costs more upfront but pays for itself over time. The extra cost of proper grading, concrete aprons, and mound construction is small compared to the ongoing cost of managing problems caused by poor design. For a commercial feedlot with several thousand head, the difference can be substantial. ## Feedlot Pen Layout and Orientation The overall layout of the feedlot affects how individual pens function. Before designing individual pens, consider the pattern of roads, feed alleys, and drainage across the entire facility. ### Pen Shape and Size Most feedlot pens are rectangular, with the feed bunk along one side and the water tank in the rear third of the pen. The typical ratio of length to width is about 2 to 1 or 3 to 1. A pen that is 100 feet wide and 200 feet deep provides 20,000 square feet, which will hold 40 to 80 cattle depending on target density. Narrower pens make better use of bunk space. When a pen is wider than about 120 feet, cattle at the back of the pen have a longer walk to the bunk. This can create uneven feed intake patterns and make it harder to observe cattle. Pens that are 80 to 120 feet wide work well for most operations. ### Pen Orientation and Sun Exposure In cold climates, orient pens so the length runs north to south. This allows the sun to reach the pen floor throughout the day. Pens oriented east to west have a shaded area along one side that stays wet and muddy longer. North to south orientation also helps dry the mound and the area around the water tank. In hot climates, some shade is beneficial, but full shade over the entire pen is not necessary. A shade structure over part of the pen or mound can help reduce heat stress. If you use shade structures, place them so they do not block drainage or create muddy areas underneath. ### Feed Alley Layout The feed alley runs along the bunk side of the pens. It must be wide enough for feed trucks to maneuver safely. A one-way alley should be at least 14 to 16 feet wide. A two-way alley needs 24 to 28 feet. The alley surface should be concrete or packed gravel to support truck traffic in all weather. The feed alley must have its own drainage. Water running off the alley should not flow into pens. Grade the alley away from the bunks or install a drain system to carry water to a collection point. ### Drainage Patterns Across the Feedlot Plan the entire feedlot drainage before building individual pens. Water should flow from the feed alley toward the back of the pens, then into a collection channel or settling basin. This pattern keeps the bunk area dry and moves manure-laden water away from feeding areas. A settling basin or retention pond at the low end of the feedlot collects runoff. This allows solids to settle out before water leaves the site. Many states require permits for feedlot runoff systems, so check with your local regulatory agency before construction. ## [Cattle Pen](/knowledge/animal-farming/beef-cattle/cattle-pen-design-drainage-and-surface-materials) Drainage Systems Proper drainage is the most important element of beef cattle feedlot pen design. Without good drainage, no other design feature can keep cattle dry and healthy. ### The 2 to 4 Percent Rule The pen surface should slope from the feed bunk toward the back of the pen at a grade of 2 to 4 percent. A 2 percent grade drops 2 feet for every 100 feet of length. A 4 percent grade drops 4 feet per 100 feet. For most pens, a 3 percent grade works well. Grades steeper than 4 percent create problems. Cattle have difficulty walking on steep slopes, especially when the surface is slick. Steep grades also cause erosion and create ruts that hold water. Grades less than 2 percent do not drain fast enough and allow water to pond. ### Crown and Drainage Direction The pen surface should be crowned in the center, with the highest point running down the middle of the pen from the bunk to the back. Water runs off both sides of the crown toward the side fences. This pattern keeps the center of the pen drier and directs water to drainage channels along the sides. Drainage along the side fences should lead to the back of the pen and into a collection channel. The back of the pen should be lower than the front, so water moves away from the bunk and the feeding area. ### Concrete Aprons at the Bunk A concrete apron along the feed bunk is essential. The apron should extend 8 to 12 feet from the bunk into the pen. This provides a firm surface for cattle to stand on while eating and prevents the area immediately in front of the bunk from becoming a mud hole. The apron should slope away from the bunk at 1 to 2 percent. This keeps water from pooling against the bunk wall and carries it toward the pen surface. The apron surface should be grooved or roughened to provide traction for cattle. Smooth concrete becomes slick when wet and causes injuries. ### Water Tank Pads Water tanks need a concrete pad that extends 6 to 10 feet around the tank. The pad should slope away from the tank at 2 to 3 percent. This keeps the area around the tank dry and prevents mud from forming where cattle gather to drink. The water tank pad should drain away from the mound and toward the side drainage channel. Water spilled from the tank and water dripping from cattle muzzles should not flow onto the resting area. ### Drainage Channels and Collection Systems A shallow drainage channel along each side of the pen carries water to the back. These channels should be 12 to 18 inches wide and 6 to 12 inches deep. They should have a continuous grade of at least 1 percent so water keeps moving. At the back of the pen, a collection channel runs perpendicular to the side channels. This channel carries water to a settling basin or retention pond. The collection channel should be sized to handle the largest expected rainfall event. For most areas, a channel 24 to 36 inches wide and 12 to 18 inches deep works well. ### Managing Manure and Solids in Drainage Manure solids settle in drainage channels and reduce their capacity. You will need to clean channels regularly, especially after heavy rain. A skid steer or tractor with a scraper blade can clean channels quickly. Plan for this maintenance when designing the drainage system. Solid separation at the settling basin is important. Manure solids should not leave the feedlot in runoff water. A settling basin with a baffle system allows solids to settle while relatively clean water flows out. The solids are removed periodically and can be spread on cropland as fertilizer. ## Bunk Space Requirements Bunk space per cow is a critical design decision. Too little space means some cattle do not get enough feed. Too much space allows feed to spoil and encourages sorting. ### Bunk Space by Animal Class The recommended bunk space per cow varies by animal size and feeding system. For calves weighing 400 to 700 pounds, provide 24 to 30 inches of bunk space per head. Calves are smaller and can fit more comfortably at the bunk. They also need less space because they consume less feed per meal. For yearlings weighing 700 to 1,000 pounds, provide 30 to 36 inches per head. Yearlings are larger and need more room to stand comfortably while eating. For mature cows and heavy feeders over 1,000 pounds, provide 36 to 48 inches per head. Large cattle need substantial bunk space to avoid crowding and competition. These numbers assume all cattle eat at the same time, which is typical when feed is delivered once or twice daily. If you feed multiple times per day, you may reduce bunk space slightly, but it is safer to provide full space. ### Bunk Space and Feed Intake Patterns Cattle establish a feeding order within the pen. [Dominant](/blog/careers/dominant-definition-biology) animals eat first, and subordinate animals wait. If bunk space is inadequate, subordinate cattle may not get enough feed. This creates uneven gains and increases the risk of digestive problems when subordinate cattle finally eat. Adequate bunk space allows all cattle to eat at the same time. This is especially important for high-energy finishing rations. Cattle that eat too quickly may develop acidosis. Cattle that eat too slowly may not consume enough for optimal gain. ### Continuous Bunk vs. Individual Feed Spaces Most feedlots use a continuous bunk with no dividers. This allows cattle to move along the bunk and find an open space. Continuous bunks work well for group feeding and are easier to build and maintain. Some operations use individual feed stalls or headlocks. These are more common in dairy operations and small feedlots. Headlocks allow individual animal handling but reduce the effective bunk space because cattle cannot move past each other. If you use headlocks, increase bunk space per head by 20 to 30 percent. ### Bunk Height and Design The bunk height should match the size of the cattle. The top of the bunk should be at about the shoulder height of the smallest cattle in the pen. For calves, this is about 18 to 24 inches. For yearlings, 24 to 30 inches. For mature cows, 30 to 36 inches. The bunk floor should be slightly sloped toward the cattle so feed stays within reach. A 10 to 15 percent slope on the feed side of the bunk helps cattle clean up feed without wasting it. The back of the bunk should be vertical or slightly sloped away from cattle to prevent feed from being pushed out. ### Concrete Apron and Bunk Relationship The concrete apron in front of the bunk should be level with the bunk floor or slightly below it. This allows cattle to stand comfortably with their heads at the proper height for eating. If the apron is too high or too low, cattle will strain their necks and may not clean up feed properly. The transition from the concrete apron to the dirt pen surface should be smooth. A sharp drop at the edge of the apron creates a lip that collects manure and water. This area should be graded to allow water to flow off the apron and into the pen drainage system. ## [Feedlot Mounds](/knowledge/animal-farming/beef-cattle/feedlot-mound-construction-maintenance) Design Mounds are raised areas within the pen that provide cattle a dry place to lie down. They are essential in wet climates and useful in all feedlot settings. ### Why Mounds Matter Cattle prefer to lie down on dry, elevated surfaces. A mound keeps cattle out of the mud and manure that accumulates on the flat pen surface. Cattle that rest on dry ground maintain better body condition and have fewer health problems. Mounds also provide a place for cattle to escape wet, muddy conditions in the rest of the pen. During heavy rain, the mound may be the only dry area available. Cattle will crowd onto the mound, so it must be large enough to hold the entire group. ### Mound Height and Slope A mound should be 3 to 5 feet higher than the surrounding pen surface. This height provides good drainage and keeps the mound surface above the water level during heavy rain. Higher mounds may be needed in areas with poor soil drainage or high rainfall. The slope of the mound sides should be 4:1 to 6:1. A 4:1 slope means the mound rises 1 foot for every 4 feet of horizontal distance. Shallower slopes are easier for cattle to climb and are less likely to erode. Steeper slopes become slick and difficult for cattle to navigate. The top of the mound should be relatively flat, with a slight crown of 1 to 2 percent. This allows water to run off the top while providing a comfortable lying area. The flat area on top should be at least 8 to 12 feet wide. ### Mound Area per Cow The mound should provide 10 to 20 square feet per cow. In dry climates, 10 square feet per cow may be adequate. In wet climates or on poorly drained soils, provide 15 to 20 square feet per cow. The mound should be large enough that all cattle in the pen can lie down at the same time. A 100-head pen needs 1,000 to 2,000 square feet of mound area. This is a mound roughly 20 to 40 feet wide and 50 feet long, depending on the shape and layout. ### Mound Placement Within the Pen The mound should be located in the center or slightly toward the back of the pen. It should be away from the feed bunk and water tank to reduce traffic in those areas. The mound should not block drainage channels or interfere with the flow of water through the pen. Place the mound so cattle have easy access from all parts of the pen. The long axis of the mound should run parallel to the feed bunk. This allows cattle to move from the mound to the bunk without climbing over the mound. ### Mound Construction Build mounds from compacted clay or a soil mix that holds its shape. Sandy soils do not work well because they erode and do not compact. The soil should be free of rocks and debris that could injure cattle. Construction begins with removing the topsoil from the mound area. Build the mound in 6 to 8 inch layers, compacting each layer before adding the next. This creates a stable structure that will not settle or shift under cattle traffic. The finished mound surface should be roughened to provide traction. A smooth surface becomes slick when wet. Dragging a harrow or cultipacker over the surface creates small ridges that improve footing. ### Mound Maintenance Mounds require regular maintenance to stay in good condition. Cattle traffic will gradually flatten the mound and push soil into the surrounding pen. You will need to reshape the mound periodically, typically once or twice per year. After heavy rain, check the mound for erosion and repair any gullies. Add soil to low spots and recompact areas where cattle have worn the mound down. Keeping the mound in good condition is essential for its function. In winter, mounds may freeze and become hard. This is not a problem for cattle, but it makes maintenance difficult. Plan mound maintenance for warmer months when the soil is workable. ## Pen Surface and Base Management The surface of the pen, outside the mounds and concrete areas, is typically compacted soil. Managing this surface is important for drainage and cattle comfort. ### Soil Selection for Pen Surfaces Clay soils are preferred for feedlot pens because they compact well and hold their shape. Sandy soils drain quickly but do not compact and become dusty in dry weather. Loam soils are acceptable if they contain enough clay to compact. The soil should be tested before construction. Soil that is too sandy will not hold a grade. Soil that is too heavy may become slick when wet. A soil with 30 to 50 percent clay is ideal for pen surfaces. ### Compaction and Grading The pen surface should be compacted before cattle are introduced. This prevents the soil from becoming uneven as cattle walk on it. A sheepsfoot roller or similar equipment works well for compacting pen surfaces. The surface should be regraded periodically to maintain the drainage slope. Cattle traffic will gradually move soil from higher areas to lower areas. Regrading with a scraper or blade restores the proper slope and removes manure buildup. ### Managing the Manure Pack Over time, manure accumulates on the pen surface and becomes part of the base. This manure pack can be beneficial because it provides a firm surface and insulates the soil. However, too much manure creates problems with drainage and odor. Most feedlots remove manure once or twice per year. The typical schedule is to clean pens in the spring after the wet season and again in the fall before winter. Some operations clean pens only once per year, depending on stocking density and climate. When cleaning pens, leave 2 to 4 inches of manure on the surface. This preserves the base and provides a cushion for cattle. Removing all manure down to the soil exposes the soil to erosion and creates dust problems. ### Bedding Use in Feedlots Some feedlots use bedding to improve cattle comfort and absorb moisture. Straw, cornstalks, and wood shavings are common bedding materials. Bedding is most useful in wet weather and winter. Bedding should be applied to the mound and the area around the water tank. These are the areas where cattle spend the most time lying down. Bedding in the feed alley and around the bunk is wasted because cattle do not lie down there. The amount of bedding needed varies with weather and pen conditions. In wet weather, you may need to add bedding weekly. In dry conditions, bedding may last several weeks. Remove soiled bedding when cleaning pens and replace with fresh material. ## Water Systems and Placement Water is the most important nutrient for cattle, and its availability affects feed intake and gain. The water system must be designed to provide clean, fresh water at all times. ### Water Requirements Cattle consume 8 to 20 gallons of water per day, depending on size, temperature, and feed type. In hot weather, consumption increases substantially. The water system must have enough capacity to meet peak demand. Water tanks should be sized to provide adequate water for the number of cattle in the pen. A general rule is to provide 2 to 3 gallons per minute of flow for every 100 head. This ensures the tank refills quickly after cattle drink. ### Water Tank Placement Water tanks should be located in the rear third of the pen, away from the feed bunk. This encourages cattle to move around the pen and reduces congestion at the bunk. The tank should be accessible from all parts of the pen. Place the tank on a concrete pad that extends 6 to 10 feet around the tank. The pad should slope away from the tank at 2 to 3 percent. The tank should be positioned so water runoff from the pad does not flow toward the mound or the bunk. ### Water Tank Design and Maintenance The tank should have a smooth interior surface that is easy to clean. Concrete tanks are durable but can be difficult to clean. Polyethylene and stainless steel tanks are easier to maintain and do not develop rough surfaces that harbor bacteria. Tanks should be cleaned regularly to prevent algae growth and sediment buildup. The frequency depends on water quality and temperature. In summer, tanks may need cleaning weekly. In winter, monthly cleaning is usually adequate. In freezing weather, tanks need a heating element or continuous flow to prevent ice formation. Heated tanks are more efficient than running water continuously. Choose a tank with a thermostatically controlled heater to save energy. ## Pen Density and Stocking Rates The number of cattle in each pen affects every aspect of pen performance. Overcrowding creates mud, stress, and health problems. Underutilizing space wastes resources. ### Recommended Stocking Densities The recommended pen density for feedlot cattle is 250 to 500 square feet per head. The exact number depends on climate, soil type, and management system. In dry climates with well drained soils, 250 to 350 square feet per head works well. In wet climates or on poorly drained soils, provide 400 to 500 square feet per head. Heavier cattle need more space than lighter cattle. ### Effects of Overcrowding When pens are overcrowded, several problems develop. Manure accumulates faster than it can be managed. The pen surface becomes muddy and slick. Cattle have less space to move and lie down. Aggressive behavior increases as cattle compete for bunk space and resting areas. Overcrowding also increases the risk of disease transmission. Cattle are in closer contact, making it easier for pathogens to spread. Respiratory disease and foot problems are more common in overcrowded pens. ### Adjusting Density for Conditions You may need to adjust stocking density based on weather and pen conditions. In wet weather, reduce density to give the pen surface time to recover. In dry weather, you may increase density temporarily. Monitor pen conditions closely and adjust stocking rates as needed. A pen that is too wet or too muddy needs fewer cattle, not more bedding. Removing cattle from a wet pen is the most effective way to improve conditions. ## Fencing and Handling Facilities The pen fence must be strong enough to contain cattle and safe enough to prevent injury. Handling facilities must allow you to work cattle efficiently and safely. ### Fence Design and Materials Feedlot fences are typically 5 to 6 feet high for cattle. The fence should be constructed of materials that will not injure cattle. Cable fencing and pipe fencing are common choices. Cable fencing uses 3 to 5 strands of high tensile cable. It is relatively inexpensive and easy to install. The cables should be tight enough to prevent cattle from pushing through but flexible enough to absorb impact. Pipe fencing is more expensive but more durable. It provides a solid barrier that cattle cannot push through. Pipe fencing is often used for perimeter fences and along feed alleys where durability is important. ### Gates and Alleyways Gates should be 12 to 16 feet wide to allow equipment access. They should swing freely and latch securely. Gates that are too narrow make it difficult to move cattle and equipment. Alleyways between pens should be 12 to 20 feet wide. This allows equipment to pass while providing space for cattle movement. The alley surface should be compacted and graded for drainage. ### Working Facilities Each feedlot needs a working facility for processing cattle. This includes a chute, squeeze, and sorting pens. The facility should be located at a central point with good access from all pens. The working facility should have a solid floor that is easy to clean. Concrete is the best choice. The facility should have good lighting and be designed to minimize stress on cattle. ## Environmental Considerations and Regulations [Feedlot design](/knowledge/animal-farming/farm-management/beef-cattle-feedlot-design-pen-layout-manure) must comply with environmental regulations. Manure management, runoff control, and odor control are all regulated in most areas. ### Runoff Control Requirements Most states require feedlots to have a system for capturing and treating runoff. The system must handle the runoff from a 25-year, 24-hour rainfall event. This is the amount of rain that has a 4 percent chance of occurring in any given year. The runoff system typically includes a settling basin and a retention pond. The settling basin removes solids from the water. The retention pond stores water until it can be applied to cropland or treated. ### Manure Management Planning A manure management plan is required for most commercial feedlots. The plan describes how manure will be collected, stored, and applied to land. The plan must be updated regularly and kept on file. The plan should include information about manure nutrient content, application rates, and field locations. Manure should be applied at rates that do not exceed crop nutrient needs. Overapplication of manure can contaminate groundwater and surface water. ### Odor Control Odor is a common complaint from neighbors of feedlots. Good pen design helps control odor by reducing the amount of time manure remains wet and anaerobic. Proper drainage, regular pen cleaning, and good housekeeping all reduce odor. If odor is a problem, consider additional measures. Manure storage covers, biofilters, and windbreaks can all help. Work with your local extension agent to identify the best odor control strategies for your operation. ## Monitoring Pen Conditions Regular monitoring of pen conditions helps you identify problems early and take corrective action. A simple monitoring system can prevent small problems from becoming large ones. ### Mud Scoring System A mud scoring system helps you evaluate pen conditions objectively. The system uses a scale of 1 to 5, where 1 is dry and 5 is deep mud. A score of 1 means the pen is dry with no mud. A score of 2 means there are small wet areas but cattle are generally dry. A score of 3 means there is mud in high traffic areas but the mound is dry. A score of 4 means mud covers most of the pen and cattle are dirty. A score of 5 means the pen is extremely muddy and cattle are covered in mud. Score each pen weekly and record the results. If a pen scores 4 or higher, take action to improve conditions. This may involve removing cattle, adding bedding, or improving drainage. ### Pen Condition Records Keep records of pen conditions, rainfall, and management actions. This information helps you identify patterns and make better decisions. For example, you may notice that certain pens stay wet longer after rain, indicating a drainage problem that needs correction. Records should include the date, pen number, mud score, rainfall amount, and any actions taken. Review these records regularly to identify trends and make improvements. ### Health Monitoring by Pen Track health events by pen to identify pens with recurring problems. If cattle in one pen consistently have more foot problems or respiratory disease, the pen design may be the cause. Work with your veterinarian to analyze health records and identify patterns. Changes to pen design, drainage, or management may reduce health problems and improve performance. ## Common Mistakes in Feedlot Pen Design Understanding common mistakes helps you avoid them in your own design. These are the most frequent errors seen in commercial feedlots. ### Inadequate Slope The most common mistake is providing too little slope for drainage. A pen that looks level to the eye may have less than 2 percent grade. This is not enough to move water effectively. Measure the slope of your pens with a laser level or survey equipment. Do not rely on visual inspection. A pen that appears level may actually be too flat for good drainage. ### Bunk Space Too Small Many feedlots skimp on bunk space to fit more cattle in a pen. This is a false economy. Cattle that cannot eat comfortably will not perform well. Use the recommended bunk space guidelines for your animal class. If you are unsure, provide more space rather than less. The cost of extra bunk space is small compared to the cost of reduced performance. ### Mounds Too Small or Too Steep Mounds are often built too small or with slopes that are too steep. A mound that cannot hold all the cattle in the pen is not providing adequate resting space. A mound with steep slopes is dangerous for cattle and will erode quickly. Build mounds with adequate area and gentle slopes. The extra material and labor are worth the investment. ### Poor Water Tank Placement Water tanks placed in low areas or without proper drainage create mud problems. The area around the tank should be concrete and sloped away from the tank. Move water tanks if they are causing problems. It is easier to relocate a tank than to manage the mud it creates. ### Ignoring the Manure Pack Some feedlots let manure accumulate until it becomes a problem. A deep manure pack can block drainage and create unhealthy conditions for cattle. Clean pens on a regular schedule. Do not wait until conditions become extreme. Regular cleaning is easier and more cost effective than dealing with a major cleanup. ## Decision Thresholds for Pen Improvements Knowing when to invest in pen improvements helps you prioritize spending. Use these thresholds to guide your decisions. ### When to Regrade Pens Regrade pens when drainage is no longer adequate. Signs include water ponding after rain, muddy conditions that persist for more than a few days, and erosion channels in the pen surface. Most pens need regrading every 3 to 5 years, depending on cattle traffic and soil type. Regrading is less expensive than rebuilding and can extend the life of the pen. ### When to Rebuild Mounds Rebuild mounds when they have lost their shape and no longer provide adequate resting area. Signs include mounds that are less than 2 feet high, slopes that have become too steep, and erosion that has created gullies. Mounds typically need rebuilding every 2 to 4 years. Regular maintenance can extend the life of a mound, but eventually the soil needs to be recompacted and reshaped. ### When to Replace Concrete Concrete aprons and water tank pads eventually deteriorate. Cracks, spalling, and uneven surfaces create safety hazards and drainage problems. Replace concrete when it is no longer functional. Small cracks can be repaired, but extensive damage requires replacement. The cost of new concrete is an investment in the long term function of the feedlot. ### When to Call an Extension Agent Your local extension agent can provide valuable assistance with [feedlot design](/knowledge/animal-farming/farm-management/beef-cattle-feedlot-design-pen-layout-manure). Call an extension agent when you are planning a new facility or major renovation. They can provide design recommendations and connect you with resources. Extension agents can also help with manure management planning and environmental compliance. They have access to research-based information and can help you make informed decisions. ## Recordkeeping for Feedlot Management Good recordkeeping is essential for managing a feedlot effectively. Records help you track performance, identify problems, and make better decisions. ### What to Record Record feed deliveries, feed consumption, and feed costs for each pen. Track cattle weights, gains, and health events. Record weather data, especially rainfall and temperature extremes. Keep records of pen maintenance, including cleaning dates, bedding applications, and repairs. These records help you plan maintenance and budget for future work. ### How to Use Records Review records regularly to identify trends. If feed consumption drops in a particular pen, investigate the cause. If health events increase during wet weather, consider changes to improve drainage. Use records to compare pens and identify best practices. A pen that consistently performs well may have design features or management practices that you can apply to other pens. ### Recordkeeping Tools Simple paper records work well for small operations. Spreadsheet programs are useful for tracking data and creating reports. Feedlot management software is available for larger operations and can integrate data from multiple sources. Choose a recordkeeping system that you will actually use. A simple system that you maintain consistently is more valuable than a complex system that you abandon. ## Seasonal Considerations for Feedlot Pens Pen design must account for seasonal changes in weather and cattle needs. A design that works well in summer may need adjustments for winter. ### Summer Management In summer, focus on heat stress and dust control. Provide adequate water and consider shade structures over part of the pen. Dust can be controlled with water trucks or by maintaining a firm pen surface. In hot weather, cattle may spend more time around the water tank. Keep this area clean and well drained. Consider moving feeding times to cooler parts of the day to encourage feed intake. ### Winter Management In winter, focus on keeping cattle dry and protecting them from wind. The mound becomes even more important in winter because it provides a dry place to lie down. Windbreaks along the north and west sides of pens reduce wind exposure. Snow removal from feed alleys and bunk aprons is essential for maintaining feed delivery. ### Spring Management Spring is the most challenging season for pen drainage. Melting snow and spring rains create wet conditions that test the drainage system. Monitor pens closely in spring and take action early if conditions deteriorate. Adding bedding to the mound and around the water tank can help keep cattle dry during the spring thaw. ### Fall Management Fall is the time to prepare pens for winter. Clean pens, repair drainage, and reshape mounds before the ground freezes. Stockpile bedding materials so they are available when needed. Fall is also a good time to review the year's records and plan improvements for the coming year. Identify problems that occurred during the year and make plans to address them. ## Working With Professionals Feedlot design is a specialized field. Working with experienced professionals can help you avoid costly mistakes and create a facility that serves you well for decades. ### When to Hire a Designer Hire a professional designer for new feedlots and major renovations. An experienced designer can help you with site selection, layout, drainage, and environmental compliance. Look for a designer with experience in livestock facility design. Ask for references and visit facilities they have designed. The cost of professional design is small compared to the cost of fixing mistakes. ### Working With Your Veterinarian Your veterinarian is a valuable resource for feedlot design. They understand the relationship between pen conditions and cattle health. Involve your veterinarian in the design process to ensure the facility supports good health. Your veterinarian can also help you develop health protocols and monitor health events. Regular veterinary visits are important for maintaining herd health and identifying problems early. ### Working With Your Extension Agent Extension agents provide research-based information and education. They can help you with design decisions, manure management, and environmental compliance. Contact your local extension office for publications and resources on feedlot design. Many extension services offer workshops and training programs for feedlot operators. ## Economic Considerations Feedlot construction is a major capital investment. Understanding the economics helps you make informed decisions about design features and construction quality. ### Construction Costs Construction costs vary widely by region and design. A simple dirt pen with a concrete bunk apron costs less than a fully paved facility with extensive drainage systems. Get multiple bids from contractors and compare costs carefully. The lowest bid may not be the best value if it uses inferior materials or workmanship. Consider the long term maintenance costs of different design options. ### Operating Costs Operating costs are affected by pen design. Pens that drain well require less bedding and less labor for cleaning. Pens that keep cattle healthy reduce veterinary costs and improve performance. Calculate the expected operating costs for different design options. A design that costs more to build but less to operate may be the better investment over time. ### Return on Investment Good pen design pays for itself through improved cattle performance and reduced health problems. Cattle that are comfortable and healthy gain weight more efficiently and require fewer treatments. Track the performance of your feedlot to measure the return on your investment. Compare your results to industry benchmarks and identify areas for improvement. ## Frequently Asked Questions **How much slope should a feedlot pen have?** The pen surface should slope from the feed bunk to the back of the pen at 2 to 4 percent. A 3 percent grade is ideal for most operations. This means the pen drops 3 feet for every 100 feet of length. The center of the pen should be crowned so water drains to the sides and back. **What is the recommended bunk space per cow?** Bunk space depends on animal size. Provide 24 to 30 inches per head for calves weighing 400 to 700 pounds. Provide 30 to 36 inches per head for yearlings weighing 700 to 1,000 pounds. Provide 36 to 48 inches per head for mature cows and heavy feeders over 1,000 pounds. **How big should a feedlot mound be?** Provide 10 to 20 square feet of mound area per cow. The mound should be 3 to 5 feet high with side slopes of 4:1 to 6:1. The top should be flat with a slight crown for drainage. A 100 head pen needs 1,000 to 2,000 square feet of mound area. **How many square feet per cow does a feedlot pen need?** Provide 250 to 500 square feet per cow. The exact amount depends on climate, soil type, and management system. Dry climates with well drained soils can use the lower end of the range. Wet climates and poorly drained soils need the higher end. **How often should feedlot pens be cleaned?** Clean pens once or twice per year, typically in spring and fall. Leave 2 to 4 inches of manure on the surface to preserve the base. Pens with high stocking density or wet conditions may need more frequent cleaning. **Should I use bedding in my feedlot pens?** Bedding is beneficial in wet weather and winter. Apply bedding to the mound and the area around the water tank. Straw, cornstalks, and wood shavings are common bedding materials. Remove soiled bedding when cleaning pens. **How do I prevent mud around the water tank?** Place the water tank on a concrete pad that extends 6 to 10 feet around the tank. The pad should slope away from the tank at 2 to 3 percent. This keeps the area dry and prevents mud from forming where cattle gather to drink. **What is the best orientation for feedlot pens?** Orient pens with the length running north to south in cold climates. This allows the sun to reach the pen floor throughout the day. In hot climates, consider shade structures but do not block drainage. The feed alley should be on the side that provides the best access for feed trucks. ## Related Farming Guides This section will be populated with links to related farming guides on cattle management, feedlot operations, and livestock facility design. ## Related Clinical & Scientific Guides * [Cattle Head Gate Selection and Adjustment](/knowledge/animal-farming/beef-cattle/cattle-head-gate-selection-and-adjustment) * [Beef Cattle Handling Facility Flow](/knowledge/animal-farming/beef-cattle/beef-cattle-handling-facility-flow) * [Beef Cattle Maternity Pen Design: Comfort and Monitoring](/knowledge/animal-farming/beef-cattle/beef-cattle-maternity-pen-design-comfort-monitoring) ## References - Beef Cattle Research Council: https://www.beefresearch.ca/ - USDA APHIS Cattle Health: https://www.aphis.usda.gov/livestock-poultry-disease/cattle - WOAH Terrestrial Animal Health Code: https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/ - FAO Animal Production and Health: https://www.fao.org/animal-production/en/ - WOAH (World Organisation for Animal Health): https://www.woah.org/en/home/ > This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.