Tip to Remember: Fish are stocked based on pond surface acreage, not depth. %4A754A754A754A754A754A754A754A754A754A757CFFA8A8A8FD1DFFFD60 %FFA8A87D7DA8FFA8FFFFFFA8FFA8FFFFFFA8FFA8FFA8FFA8FFFFFFA8FFA8 Previously, NRCS recommended installing an antiseep collar around the barrel to ensure that water from the pond does not leak between the outside surface of the barrel pipe and the earthll of the dam (figure 7). Before you hit the turkey woods this 2023 season, check out the latest turkey hunting guns and ammo so you'll be ready with the best turkey gear for the season. Most are cold-blooded, though some (such as some species of tuna and Siphoning action begins when the air in the siphon tube has been exhausted. 2023 by the Alabama Cooperative Extension System. Welcome to the NRCS newsroom! %047D5252A8FD057DA852A8527D52A8527D527D7D7D52527DA87D7D52FD04 SWCD Dry Hydrant Fact Sheet and Homeowner Mini Grants Dry Hydrant Diagram NRCS Technical Description The area around the trough should be protected from erosion using either concrete or geotextile filter fabric and crushed stone. %4A754A754A754A754A754A754A754A754A754A754A754A754A754A754A75 %4AA0FD0BFF4A7551754A7551754A7551754A7551754A7551754A7551754A We are just finishing up construction on a two acre levee pond in southern Louisiana. Our pond siphon systems can even be retrofitted into older existing ponds as well. Read on to learn more about where mussels come from and how they can benefit your pond. Open Channel Spillways | Association of State Dam Safety %4A754A754A754A754A754A754A757DFD19FFA8522E52527D2E7D2D7D5884 %FFFFFF7DFFA8FFA8FD06FFA8A8A8FFFFA8FFA8FFFFA8A8FD0CFFA827F827 Ponds constructed in woods should have the cleared limits irregularly shaped to provide a natural-appearing edge and open area. %7DA8A87D7D7DA87D7DA87D7D7DA8527DA87DA87D7D7DA8A87DA8A8FFA852 If a watering ramp is provided, cattle should have access to the pond only at the ramp location, with a walking surface protected with geotextile filter fabric covered with crushed stone (figure 12). %A8FD1EFFA8A8FD1DFFA8A8FD0DFFA8FD04FFA8A8A8FFFF7DFD07FF7DA8FF %FD0427A8FD0CFFA8A87DA87DA8A8A87DA87DA8A8A8FD047DFD05A8FD047D %757551757575517575755175757551757575517575755175757551757575 Read this blog to learn how we can bring gobblers back to where they can maintain themselves. The graph was created in a manner as to allow use across a variety of siphon sizes, pond sizes, drawdown volumes, and drawdown times. %754A7551754A7551754A7551754A7551754A7551754A7551754A7551754A %077DA85252A8A8A87D7D7DA87D7DA87D7DA852A8A8A87D52A87D52A8A8FD NRCS applies sound engineering tools and principles to plan, design, and implement conservation practices and systems through delegated approval authority. Also by removing the stagnant water from the lower levels of your pond, the siphon is key in maintaining water quality. %000088888888AA000000AA000000AAAAAAAABB000000BB000000BBBBBBBB m./sec., for maximum, average and minimum discharges respectively. Principal spillway showing barrel pipe connected to riser pipe with concrete counterweight attached to base of riser to counteract buoyancy. %2BA9CFA92BF9027574755175757551757575517575755175757551757575 And check out our guide to best turkey guns and ammo for this season . You will thank me for many, many years to come. Click on image to enlarge. This website uses cookies to collect information to improve your browsing experience. PDF Pond Siphon System - Brashear Realty Corporation PDF Irrigation Systems for Idaho Agriculture Screen Printing and Embroidery for clothing and accessories, as well as Technical Screenprinting, Overlays, and Labels for industrial and commercial applications NRCS programs are administered following the National Historic Preservation Act and other laws. Conservation and organics go hand-in-hand, and NRCS offers tools for organic farmers to improve their operations. This will allow the cattle access to the pond without miring in mud to get to the water. %%PageOrigin:0 0 Pond size, shape, and depth are limited by the topography of the site and the size of the watershed draining to the pond. %527D52525227525252277D2727F8272752522752FD0527A852F85227277D Fall is an excellent time of year to consider any construction work on your lake or pond. Visit our Ag Documents page and view pond guidance documents for Georgia landowners. %6666006666336666666666996666CC6666FF669900669933669966669999 %CCFF00CCFF33CCFF66CCFF99CCFFCCCCFFFFFF0033FF0066FF0099FF00CC %754A754A754A754A754A754A754A754A7575FD04A8FD17FFFD6675A7A8FF %754A754A754A754A754A754A754A754AA1A8A776A8FD06FFAEFD05FFA8FD Further transition with vegetated surroundings can be accomplished by feathering clearing edges. %PDF-1.4 % %FF7D7D7D84A8837D8483A8A8AE7DA8FD3DFF27FFA8A8FFFF7D7C4A754A75 NRCS Publications - Item Detail - USDA There are two water control structures (spillways) that must be designed and sized appropriately to make sure that water can safely drain from the pond during routine and heavy rainfall events. NRCS has soil maps and data available online for more than 95 percent of the . (378). Barry W. Smith |Originally published in GameKeepers: Farming for Wildlife Magazine. Fluids Flow Design and Engineering Hydraulics and Pneumatic Design and Engineering Siphon Flow Rate from Small Pipes Equation and Calculator. Should fencing be necessary to control livestock through the spillway, it must be routinely cleaned to prevent the buildup of debris. %7D2727527D527D27277D2727275227277D27F87D277DF85227525227527D Inverted Siphon For Storm Pipe - Storm/Flood engineering - Eng-Tips The pipe on the backside of the dam needs to be a third longer than the front side to make the siphon work properly. The design, inspection, and maintenance criteria for a dam are based on its classification. K-4369-961.28 gpf Left-Hand Trip LeverToilet Tank with AquaPiston Flush RechnologyBiscuitThis WaterSense-labeled high-efficiency toilet tank combines water conservation with the versatile style of the Cimarron collection. %%DocumentProcessColors: Cyan Magenta Yellow Black One of the premier pond construction experts in the Southeast is Mr. Bobby Gates of the Natural Resource Conservation Service (NRCS) of the US Dept. Strategies for Lake and Spillway Design | Mossy Oak Ponds Program | Georgia Soil and Water Conservation Commission %04FF7DFFFFFFA8FD05FFA8FFFFFF7DFFA8FFA8FFFFFFA8FF7DFFFFFFA8FF The lake side of the pipe is angled toward the bottom to a depth that allows the water from the bottom of the lake to be drawn off during times of high water. %DD000000DD000000DDDDDDDDEE000000EE000000EEEEEEEE0000000000FF No valves to open or close ever again! Built the fence at least 60-100 feet from the pond edge. %AI5_FileFormat 8.0 nrcs pond siphon design - zehirsizsofralar.org In Nebraska, dams are classified by their size and their hazard potential. Find contact information for your state office location and employees. %A85252A8A8A87D7DA8A8A8FF7DA87D7D7DA87DFD06A8FD5CFFA8FD0BFF7D Chapter 50 Earth Spillway Design (210-vi-NEH, August 1997) 50-1 Chapter 50 Earth Spillway Design 628.5000 Scope Chapter 50 describes the design considerations and processes involved in earth spillway design. %7D7D7D52FD047D52A87D7DA8FD067DA87D7D7DA87D7D7DA8A8FFA8FD3AFF is pepperoni processed meat; pictures of yin yang tattoos. Mussels are filter feeders that travel from one location to the next feeding on phytoplankton and decaying organic matter. Design Criteria for Bottom-Withdrawal (Lake-Cleaning) Spillway This agency was formerly known as the US Soil Conservation Service (SCS). 0 . Cross section of a bubbler screen built from a corrugated pipe with a poured concrete base. For field measurements a transparent hose acting as a siphon, as illustrated below, will be found useful. The siphon should be considered for older ponds that are being renovated and that require a new principal spillway system. Watering Systems for Grazing Livestock - Iowa State University jO 4#`.pCl6AD.anjA6M7! The water level in a levee pond is higher than the original ground level. *This is an excerpt from Pond Building: A Guide to Planning, Constructing & Maintaining Recreational Ponds, ANR 1114. It was planned with NRCS guidance who recommended a 12 inch siphon spillway. %CC9966CC9999CC99CCCC99FFCCCC00CCCC33CCCC66CCCC99CCCCCCCCCCFF A 1.28-gallon flush provides sig Please let us know if you have accessibility needs. %A87DA8A8A87DA8A8FF7D7DA8A87DA87DA8A87D7DA87DA87DA8A8A87DA8A8 At a specific point (usually 2 inches below the surface) the water drains via the bell siphon. Technical service providers offer planning, design, and implementation services to agricultural producers on behalf of NRCS. Seemed way too small to me. Totally agree with posts above. They can also be used as a water source for livestock, fire The primary spillway is usually a pipe system (standpipe, siphon system, or a pipe at the waterline through the top of the dam) that is sized to carry all but the very heaviest rainfall. %AI5_OpenViewLayers: 7 %0066000066330066660066990066CC0066FF009900009933009966009999 Often, minor changes in the dam alignment and spillway location can shift these elements out of view and reduce their prominence. As the water begins to rise, it seals off the vent and as the pipe fills with water the siphon starts automatically. This content printed from the website located at. %%+ 0 0 0 (New Color Swatch) %277D2752527D2752F8525252275252277D7D5227F852527D2727F827527D %PDF-1.2 % fifth third bank zelle daily limit. Density and height of vegetation can be increased progressively from the waters edge to the undisturbed vegetation. %757575517575755175757551757575517575755175757551757575517575 HWko)~X)Qp *W';*kb&1={_gf lr_l> OEG~,,% R. %AI9_OpenToView: -61 624 1 1266 591 26 0 0 17 116 0 0 1 1 1 0 1 a conflict manhole may collect some debris, but unlikely to fill %754A754A754A754A754A754A754A754A754A754A754A754A754A754A754A %A8FFA8A8A8FFFFFFFD05A8FD0EFFA8522727525227277D522727277DFD04 Helps state and tribal governments improve public access to private lands for recreation. Livestock that have unlimited access to the pond can ruin the pond's bank slopes and sod, weakening the dam and spillway. Spillway siphons have many advantages, the first of which is if constructed properly, they cut on and off automatically. %7D27522752525227527D52A8FD28FFA8FFA8A8FD08FFA8FFA8FFFFFFA8FF nrcs pond siphon design NOTICE - National conservation practice standards should not be used to plan, design or install a conservation practice. The design guidelines for major dams are outlined in NRCS Technical Release 210-60 - Earth Dams and Reservoirs (March 2019). n Minimum bottom width is 5 feet for dams < 20 feet tall n Minimum bottom width is 10 feet for dams > 20 feet tall n For closed emergency spillways (culverts, etc.) Livestock wading into the water will destroy fish spawning nests and create muddy water. m./sec. Also, a 45 elbow should be attached to the end of the discharge to help aerate the water and prevent a hole from being blown out from the pressure of the discharge. Make a Bell Siphon : 4 Steps - Instructables The most common design is a standpipe with a barrel through the base of the dam. Determine the following: a. %FD047D52527DA852A8527D7D7DA8A8A87D527D7DA8A8FD047DA8FD087DA8 %275252275227F85252FD04277D2727F87D275252275227277D52A8527DF8 For more information on managing ponds for fishing, see Extension publication ANR-0577, Management of Recreational Fish Ponds in Alabama.. Carter Ponds Rehabilitation (2008) Tom Carter Montana DNRC %FF7D7DFFFFA8FFA8FFFFA87DFFFFFFA8A8A8FFFFFFA8FD5BFFA827527D7D The riser pipe must be adequately sized to deliver water to the barrel pipe and is usually 1 to 2 pipe sizes larger than the barrel pipe. Saddle siphon spillway can be constructed in many designs but basic concept for all of them is the same. Siphon-tube irrigation is particularly vulnerable to trash because the trash is often held against the opening by the suc-tion in the tube. To drain the pond, remove the pipe F and its extension, screw an end cap into the T pipe at D, close the pipe at the end of point C with a plug, insert a vacuum pump at the top of point D, and pump out air until the system starts siphoning. There are several details of construction that are very important. says Gates. Where possible, locate the pond (or the house) so that the major sight line crosses the longest dimension of water surface. %%+ 1 0 0 (Global Pure Red) One way to minimize erosion is to design a flatter channel slope to reduce the velocity of the flow. The siphon system must be periodically checked and maintained since a plugged air vent could cause the pond to drain. %517575755175757551757575517575755175757551757575517575755175 Siphon Diagram %%+ 1 1 1 (New Color Swatch 1) The IND 63rd Street Line and BMT 63rd Street Line, also referred to as the 63rd Street Crosstown, Crosstown Route, [1] or Route 131-A, [2] are two rapid transit lines of the B Division of the New York City Subway system. Our pond siphon systems come in many different pipe diameter sizes and must be custom fitted to your pond or lake depending upon the size/acreage of your pond or lake and how much water shed or live running water you have coming into your body of water. It is typically the driest time of year and water levels are often lower than normal. This type of pond is best suited for areas with slightly to moderately rolling topography. Learn about the conservation needs and latest updates in your state, and access needed resources. %7D52A8FD057DA87D7D7DA8FD067DA8A8A8527DA8FD047D52FFFD067DA8A8 We offer conventional PVC pond pipe systems, spillway siphon systems, and the low watershed "A" system for effective, low-cost water management control to fit any aquacultural development. %527DF852272752527D52F85252277D27277D5252F87D52522727527D277D Brings together partners to innovate on conservation approaches and technologies. %7D7D52A8F82727A852A827525252F87D7D27277D52522752277D27527D52 Saddle Siphon Spillway. This keeps the clean water in the top layer of the lake, providing more food for fish and providing more opportunities for other recreational activities, such as swimming and boating during the summer. %F9032B7ECF7E2A22754A754A754A754A754A754A754A754A754A754A754A 2 ponds (Upper and Lower) constructed in 1938; Original purpose was for irrigation/agriculture use; Primary current purposes: Recreation, fishing, wildlife habitat, agricultural use, MFWP access site; Dam Height: 22 feet (Lower), 17 feet (Upper) Dam Storage (acre-feet): 176 (Lower), 119(Upper) Dam Classification: Not High . Install both end caps. There are no members with birthdays on this day. %7551754A7551754A7551754A7551754A7551754A7551754A7551754A7551 %0099CC0099FF00CC0000CC3300CC6600CC9900CCCC00CCFF00FF3300FF66 Any potential shade around the watering ramp should be eliminated to keep cattle from loafing in or near the pond. The principal spillway through the dam designed to control runoff from routine rainfall has several key components. Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. If the lake is full I like to use a small generator to power a shop vac to start a siphon. Depending on the site, the hillside of the pond can provide a significant amount of watershed runoff to the pond, thus reducing and, in some cases, eliminating the need for pumping water to fill and maintain the pond. %FFFFFFA8FFA8FFA8FD0AFF522727A82727277D52522752527D277D522727 Assistance to inventory and analyze farm systems that use energy and identify ways to improve efficiency through an Agricultural Energy Management Plan. rigated systems supplied by siphon tubes or gated pipe range between 30 and 40 percent, with effi-ciencies of 50-60 percent possible with excellent management. No more need in most cases to ever have a pipe penetration through the base of your dam again! %A8FFFFA8A8A8FFA8FFA8FFFFFFA8FFA8A8A8FFA8FF7DA8FFA8A8FFA8A8FF NJK/K*(r=)LQ0Xj/+okoz$Q `@hfWAy=k \V+)2,R6H[#@1|#db(AN1 /APdO@T _xaa2?H]E9 9N0720@2a =~\ -74paC`6 @7z~0`cx :6;2 -~9$6{vwhZ#VLc(:3&P3k(P3&#vM">{c`ahA}:&.I2CWZNScZ(zKmEZ\RE[pjV=57K[ZP3+eS3&O]hL When feasible, locate the pond so that some existing trees and shrubs remain along part of the shoreline. %F87DF852F8FD045227277DF827527DF8522727A8FD54FFA8A87DA8FD057D %27F82727527D7D52FD052752F8272727A85227FD04527D2727F8A8F82752 Follow our step-by-step process to get started making improvements on your land with our one-on-one conservation assistance. Web Soil Survey - Home the checks. %99CC6699CC9999CCCC99CCFF99FF0099FF3399FF6699FF9999FFCC99FFFF Helps producers protect wetlands, grasslands and farmlands for future generations. A trough or tank is placed downstream of the dam and connected to the pond water by a 1-inch plastic pipe. In no particular order, heres a look at the best new hunting bows for 2023. (i) Saddle siphon spillway. This video explores how Dave Budeau of Turner, OR, constructed a pond to build wetland habitat on his land. %A87D7D7DFF7DA87D7D527D7DA87DA87DFFA87D7DFFFFA87DA87D7D52A87D Embankment pond (not to scale). Chapter 50 Earth Spillway Design - USDA To find these documents at the local level,visit our Field Office Technical Guide website. Accelerates conservation benefits through targeted efforts for water quality, water quantity and wildlife. %7551754A7551754A7551754A7551754A514A757CA8A8FF84A8A8FD0BFF75 Get a design consultation and have a 3D rendering of your space made so you can fully visualize the changes that can take place in your bathroom . %AI3_DocumentPreview: None %AI3_ColorUsage: Color Helps private and tribal landowners, land trusts, and other entities protect croplands and grasslands on working farms and ranches. and economic well-being. %51FD41754A757CFFA8A8CAFD22FFFD12F9034C747551754A7551754A7551 %517575755175757551757575517575755175757551757575517575755175 Intakes suspended 18-36 inches below the pond surface will withdraw the best quality water. Assignment 11 siphon spillway design - BI E 5300/ 6300 Assignment - StuDocu Assume a Cd value of 0 when applying the orifice equation for the siphon spillway capacity. %%EndData %75A1FFA8FD1AFF4A754A754A754A754A754A754A754A754A754A754A754A %7551754A7551754A7551754A7551754A7551754A7551754A7551754A7551 The size of the siphon is usually determined by the size of the lake and its watershed. Once the pipe is full, close the vent and remove the cap from the end of the discharge pipe, stand back, the water is coming! Spillway Siphon Systems for Lakes and Ponds | Mossy Oak %A8527D27F8FD0427F852522752F852277DFD0DFF7DA8A8A87DA87DA87D27 Excavated, or dug, ponds are constructed almost entirely below the original ground level (figure 3). Check out progress photos and detailed info on how to restore ponds the right way. Pond Dam Piping, Ltd. - Complete Pond Systems The IND 63rd Street Line is served by the F and <F> Express. %4A7575754A7575754A7575754A7575754A7575754A7575754A7575754A75 Revised by Russell Wright, Extension Fisheries Specialist, School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University Written by Chris Hyde, Extension Aquaculturist, Department of Fisheries and Allied Aquacultures, Auburn University, and Perry Oakes, State Conservation Engineer, USDA Natural Resources Conservation Service, Alabama. Attention International Customers: If your items are to be shipped internationally, please call 1-888-LANDCARE to place your order. and 0.093 cu. 1 0 obj<> endobj 2 0 obj<> endobj 5 0 obj<>/ArtBox[47.5527 30.2002 758.636 612.0]/MediaBox[0.0 0.0 792.0 612.0]/Thumb 54 0 R/TrimBox[0.0 0.0 792.0 612.0]/Resources<>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/ExtGState<>>>/Type/Page/LastModified(D:20130331171510-04'00')>> endobj 6 0 obj<> endobj 7 0 obj<> endobj 8 0 obj<>stream %51754B7551754B7551754B7551754B7551754B7551754B7551754B755175 %FD047D5227A8A8FD08FF52A8A8A87DA87DFD78FFA85252FD052752FD7AFF NRCS has employees in counties across America that help local communities every day. It does not contain the detailed hydrologic or hydraulic proce-dures used to synthesize the anticipated storm flow conditions. %52522752275227A8277D7D7D27A85227275227277DFF52527D5227272752 Then determine the pipe diameter needed for the required flow capacity. Combination watershed-levee pond (not to scale). Figure 5. Figure 1 shows one suggested design for a homemade suspended inlet. There are a number of publications that can help size the pipe, depending on how much storm storage the lake has, that is the difference in the full pool elevation and the emergency spillway elevation. Ponds should have a minimum average depth of 6 to 8 feet with water at least 4 feet in depth at an easily fishable distance from the shore. %757575517575755175757551757575517575755175757551757575517575 For example, a pond with a surface area of 3.2 acres and a depth of 12.5 feet at the dam has an approximate capacity of 16 acre feet(0.4 x 3.2 x 12.5 = 16 acre feet); (1 acre-foot = 325,851 gallons). Typical barrel pipe sizes range from 4 to 30 inches in diameter, and riser pipes range from 6 to 48 inches in diameter. Figure 6. Trade and brand names are given for information purposes only. I knew this vest would be special. %33CCCC33CCFF33FF0033FF3333FF6633FF9933FFCC33FFFF660000660033 %2752FF27F852F8277D522752F852272727A8277DFD0427F8A82727525227 Many of those lakes have had problems with deteriorating risers that leak and prevent the lake from maintaining a water level. The table . Once the siphon is broken when the pond is lowered, the pond begins to refill. My question is, will a 12 siphon be enough for my lake? This construction method is usually used only for construction of small ponds (generally less than acre) because of the large amount of earthmoving required in relation to the size of the pond. No trees or shrubs should be planted or allowed to grow in the spillway. Learn about webinars, training opportunities and local events related to NRCS programs and services. %F87D52522752277D27277DA827A87D7D527D27522727277D5252F8272727 Achieving good compaction of the earthll around the barrel pipe is extremely important. Pro Pond Solutions sells and installs new state-of-the-art over the dam siphon systems to regulate the level of your pond or lake. Refer to section 4-14 to 4-16 of the USBR book, and to the lecture notes. %5252527D52FF27A85252527D527D527D7D527DFF52A87D7D277D277D527D %277DFD0452272727522752277DFD045227527D5227A827FD04527D272727 nrcs pond siphon design - collaboration-expert.pl %A7A8A8A7FD21FF2A022A232A022A232A022A2329232A232A237574755175 %754A7551754A7551754A7551754A7551754A7551754A7551754A7551754A %2727F82752275252F852527DF82752FD0527525252F8277DFD052752F852 Figure 2. This system collects seepage and channels it through the dam without eroding the area around the barrel pipe. Our pond siphon systems can even be retrofitted into older existing ponds as well. Helps producers identify conservation objectives and a roadmap for conservation on their operation. %FD07FFAE5FAEFD04FF8384FFAFFD05FFAFFD05FFAFFFFFFFAEFD10FFFD1E Plant the banana on the "bank" of the pond and allow the roots to find the water. What's the future of wild turkey hunting and conservation? The outlet in the trough should be equipped with a valve to control the water supply. Land grading to eliminate low spots reduces local overirrigation and raises effi-ciency by about 5-10 percentage points. The technical resources and references NRCS provides uses science-based technology to aid conservation planning and benefit soil, water, air, plants, and animals for productive lands and healthy ecosystems. nrcs pond siphon design - oceansidecrypto.com The system can be designed with a simple open vent so that a siphon never forms unless the vent is closed with a valve to permit lowering the water for maintenance. %A8FF84FFA8FFFFAEA8FFA8AEAEFFAFFFA8FFFFFFA8FD0DFFFD25F930AFCF Find them in the USDA Employee Directory. Once the water has drained to normal level the air vent is exposed and the siphon automatically stops. Use the Chezy equation with C = 60. %4B7551754B7551754A757CFDFCFFFDFCFFFD12FFA8FD7CFFA8522727F827 The key to the success of this siphon system is the air vent that is installed on the lake side with the opening at the normal water level. Then reinstall the top T cap and tighten. Install a threaded cap on both ends with a T at the high point on top of the dam with a cap. Earth from what is to be the basin area of the pond is removed and used to construct the sides, or levees, of the pond that impound the water (figure 4). Growing Bananas in a Greenhouse - Garden & Greenhouse I have a three acre pond with I think about 120 acres of runoff, two feet of free board and a 12" PVC outflow pipe that is built into the levee angled down at 45 degrees. Technical guides are the primary scientific references for NRCS. For over 80 years, weve helped Americas farmers, ranchers, and landowners conserve our nations resources through our voluntary programs and science-based solutions. An official website of the United States government. Siphon spillway Brings together partners and producers to protect wetlands. Stay updated on the latest news and stories from NRCS and other USDA topics. Ponds Planning, Design, Construction i Agriculture Handbook 590PondsPlanning, Design, ConstructionPreface This handbook describes the requirements for building a pond.