The non-woven, spun bonded fabric exceeds most industry standards and weighs a mere 0. Hey Terry, I'm in Maine and I need to trench for a water line. When approved by the Engineer, material may be used as final trench backfill in a dry trench. Trench excavation is defined as the removal of all material encountered in the trench to the depths as shown or directed by the. to an elevation at least one foot above the top of pipe. Sand was specified by our local building department. The thickness of backfill depends on the desired trench depth. Uniform Standard Specifications and Details for Public Works Construction—2017 Revision to the 2015 Edition The MAG Standard Specifications and Details Committee, with assistance from five specialized working groups, considered 20 cases during the 2016 session. TECHNICAL REPORT DOCUMENTATION PAGE With CLSM backfill, trench from 10 ft to 61 ft. The Soil Separator Trench Wrap is used to separate gravel and soil backfill in a trench, allowing the gravel to remain porous and the soil to stay firm and intact. Backfill materials shall consist of suitable existing trench materials, except as otherwise specified in the Geotechnical Report or Special Provisions. Figure 6-2 Bedding and backfill for semirigid pipe, 60 Figure 7-1 Olander moment, thrust, and shear coefficients for 90 ˚ bedding angle, 72 Figure 7-2 Force diagrams for reinforced concrete pipe design, 73. Cave-ins are much more likely to result in worker fatalities than are other excavation-related accidents. Place the specified thickness of bedding material over the full width of the trench. The bedding material is placed in the base of the trench, then the pipe itself laid and checked for alignment and gradient before the sidefill is added and finally the backfill. Gaps between bales should be chinked with straw to prevent water from escaping from between them. Chapter 7 Underground Installation of PE Piping 267 Figure 1 Pipe Trench Note: When groundwater levels are expected to reach above the pipe, the secondary initial backfill should be a continuation of the primary initial backfill in order to provide optimum pipe support. Trench Foundation Stabilization C. The work included under this Section consists of furnishing material and equipment, and performin g al l labor nec ess ary for excav ati ng, bac kf illing, filling and compa cti on of area s to be. Of these, 16 were approved and included in this revision. trench bed should be 6” of sand or backfill as specified by the engineer, providing a smooth and uniform stabilizing surface (sandbags may be used as a means to keep the pipe off the ground until backfilling is started). A sump pump discharge line is meant to be piped indirectly into line dedicated to receiving ground water. The victim entered the unprotected trench by climbing down a ladder. The street in the area of the trench or hole shall be milled to a two (2) inch depth for a width of twelve (12) feet, being centered along the length of the trench or hole. I am trying to figure out the best and fastest way to get the dirt/clay to settle. PART 1 - GENERAL. EXHIBIT "A Technical Specifications for Water and Sewer Service Lines Water and Sewer Line Bedding and Backfill: Drawings show cross-section of trench, pipe laid on top of 6" min. Trench boxes must extend eighteen inches above the surface and be no more than two feet from the bottom of the trench. Less expensive projects can run as little as $400 while more expensive ones are about $1,200. Water and sewer can sometimes go in the same trench, but the water will have to be a few feet higher. The Department cannot grant approval of OWTS for commercial developments or multifamily residences without concurrence by the Regional Board. 11119271 (1) – APRIL 2018 SECTION 02351 - 3 EXCAVATION, BACKFILL, AND TRENCHING c. Native backfill soil shall not consist of expansive clay. Ground Water. Backfill comprises the material above the embedment zone, in accordance with Drawing 7251/8/301 and AS 3725-2007. Sand was specified by our local building department. 13 WATER FOR CONSTRUCTION. The top 42 inches of a water or sewer line trench will not be backfilled with soil containing rocks that are larger than 3 inches of any dimension. To verify that your backfill material meets our specifications, use the Approved Backfill Calculator. With the pipeline in position, the crew begins backfilling the trench to cover the pipeline. In any case, above this point, but up to the upper 6-inches of the trench, backfill shall be of material not exceeding 6-inches in diameter. 02 DESCRIPTION OF WORK A. If this third pile has many large rocks, or is a clay based material or red pan, or any material that retains water, you should avoid using this as backfill against your inground pool walls. Permeability of flowable mixtures can be varied sig-nificantly to suit the application. How to Backfill a Trench & Settle Dirt. Sewer and Water Line Design •Sanitary sewers follow topography to use gravity flow, avoid installing pump stations •Waterlines are pressurized, can flow uphill and can usually stay along roads - make loops if possible in distribution lines •MHs at bends or < 400’, fire hydrants < 1200’ •No MHs in streams, no PSs in floodway. Auger Backfillers for Pipeline & Tile Drainage Installation. 15 Backfill Material 93. Then, backfill the trenches with either sand or smooth pea gravel (I prefer sand) to about 6" above the pipe (12" is better). Once I am done I pull on the ropes to drag the plywood out. I'm using 1" black pipe from the lake to the house. Good Craftsmanship Guide Foundations, Substructures re-bottom trenches if affected by ground water or drying line of trench bottom backfill 500mm 450mm max. 1 Excavation 608. Re: how much sand to backfill waterline trench? When I back filled our water line, I put in about 6-12 inches of sand. raise in 6" layers to 90-95% proctor 4" min. DO cover sawdust with plastic and tuck in sides. When standing water is in pipe foundation area, No. The backfill should be compacted using vibratory or water flooding methods. When the service line is laid in the prepared trench, special care shall be taken to insure that minimum radius is maintained on plastic and copper service. Approved backfill materials to be used at site. Clay pipes are prone to impact damage from such things as large stones or a half brick coming into contact with the pipe during the back fill process, settlement to the sub-soil beneath the pipe can lead to stress fractures and collapse it is therefore necessary to ensure that the pipe work is bedded an an appropriate granular material. Starting at the lowest point, dig a base trench the length of the wall. There was no protective system in the trench (though there was a hydraulic shoring cylinder near the bottom on one side). This will prevent soil infiltration when backfilling. All water and equipment. Centering devices are helpful in this task. Backfill crib walls simultaneously during wall erection. What To Expect With A New Water Line Trench. and a minimum of 6” between pipe units. TRENCHING, BEDDING AND BACKFILLING. Slurry is the best backfill material to use when completely burying an above-ground pool since it can better support its own weight. Trenching, Backfilling and Compaction of Utilities Page 2. When trench backfill is required, gradations. Sewer or septic line replacement or installation: backfill requirements and procedures, Details of Final backfill over a new sewer pipe Step by step main drain line or sewer or septic line backfill procedure, Questions & answers about backfill procedures & specifications when replacing a sewer or septic line or pipe. 1 Water and sewer OK in same trench if both materials approved for use in the building. but like I said everyone uses the water companys trench but I personally think that 200$ is not worth getting sued for on a 3200$ service. This means the smaller discharge piping is evacuating the water into a larger diameter piping with an air gap between the two. trenches, constructing trench foundations, placing bedding, pipe zonematerial , and trench backfill. 12 sloped trench erosion control 13 thrust blocks 14 anchor blocks 15 sloped pipe anchor blocks 16 3/4” water service assembly 16. Or in other words you dig a trench 770mm lay sand and the pipe, and wait for the water inspector to inspect it, after he's ok'd it cover with sand back fill 150mm and lay marker tape the length of the pipe, continue back filling to a depth of 400mm lay sand and gas pipe and wait for the gas board, sand, marker tape for gas and back fill. And of course, use the appropriate warning markers. Meo, Raffaele. When the trench is cut, the pipe will follow the line and grade of the trench and any deviations in the design slope can affect pipe hydraulics. HANDLING OF MATERIALS 1. flow lines shall have a 1/10 drop or as indicated on plans. Figure 3 Large Load Rain Insufficient Shoring Vibration Cracks Water Seepage Broken Line High Water Table Settling Figure 2 - Many factors affect trench stability. Excavate trench for pipe installation. In any case, above this point, but up to the upper 6-inches of the trench, backfill shall be of material not exceeding 6-inches in diameter. Attach the pipe to the main and the house with the new fittings. The SOL 481-13-03 gives direction on using PennDOT specifications (Section 601-Pipe Culverts) for trench backfill, including subsurface utilities. diameter cement coated pipe, mostly in. HCWCID 109 Surface Water Backfill Lines By Grady Turner, PE & Tobin Synatschk, PE North Harris County Regional Water Authority (Authority) was created June 18, 1999 when Texas House Bill 2965 was signed into law and voters confirmed the creation of the Authority. 08 Corporation Stop 93. Water I don't know (have to find out though for another reason) we are on tank water here. end-of-line manholes that ham future extenspns and mat are located in pavement shall be backfilled nth flowable rll or 33-p stone (pug). Even wh well compacted backfill some settlement can be expected. 5 meters depth under soil cover. 01 General - Excavate, backfill and dispose of excess excavated materials in. Trench boxes must extend eighteen inches above the surface and be no more than two feet from the bottom of the trench. Backfill refers to the material used to refill an excavated hole, and it is typically used to strengthen and support a structure's foundation while also promoting better water drainage. Trench Excavation and Backfill: a. Has anyone here done this on a new home being constructed with a full basement underground? The builder wants to backfill with the existing dirt from the excavation, but I told him to use gravel or crushed stone instead of the high clay content soil to better promote drainage. The concrete sides will not be backfilled until the specified coatings are applied and fully cured on the concrete surface. Water Pipe - shall be at least six inches below the frost line Scopes of Work and Specifications There are a couple of things you will want to include in your scopes of work and specifications for water and sewer service installation and under slab plumbing. Approved backfill materials to be used at site. The addition of 24 inches of filter media (coarse sand) to a pressure distribution soil dispersal component provides the wastewater treatment not provided by the Type 1 soil. Water Thoroughly. Trench must be clear of standing water before PPL EU crews will install electric facilities. Disconnect the old pipe at both ends. My question and concern. Peoples Gas Company LLC will install, test, and connect the gas mainline during a single visit to the job site. Work from the Water Supply: Incase you come across a hidden obstacle, then you can easily adjust. It took 62 man hours to remove sod, dig and then re-fill, then replace sod on 240 feet of trench. Need to dig a 1000 foot long utility trench to bring water, power and telco to home site. bottom of trench. When I look at the first job. Walk through the bottom of your trench and remove any large rocks or debris. Although slurry walls are versatile and adaptable control measures, they are not suited to all waste sites or waste types. A sump pump discharge line is meant to be piped indirectly into line dedicated to receiving ground water. 2 bed zone refer to note 1 backfill zone refer to note 5 typical box culvert trench section under roads. Installation of ADS pipe is in most respects very much like that of any quality pipe installation. The trench needs to be on the order of 2 ft deep, and our soil is hard digging, so I decided to rent a fairly big trench digger -- this was a good decision, and saved a lot of time. Scoop out the grass and dirt with a shovel and keep it on another tarp. PART 1 GENERAL. Once the pipe is adequately backfilled and compacted, the trench can be filled up to grade, per the project specifications. Hook to existing line at value extending to property line at highway right of way and hook to exis>> Trench, install and backfill 3300 ft. Slope the bottom toward the low-lying side by digging a smooth slope on a 1/8-inch decline per every horizontal foot. Backfilling will proceed symmetrically about the structure, whenever possible to do so. Filling a trench back in we dug for a water line. (b) where cover is greater than 8-o" (2. Water I don't know (have to find out though for another reason) we are on tank water here. It is best not to dig your proposed trench too far in advance of your pipe laying. Workers were draining the trench using a pump. My first trench was dug by hand by 2 men. The specifications require the Contractor to remove the ground water from the trench. • After the pipe has been joined, fill it with water, carefully bleed off any trapped air. Under stable working conditions, the trench must be free of water and at widths designated by the contract documents. been used for years as a trench backfill for utility repairs in Kentucky, and is now being used by the Kentucky Department of Highways (KDOH) on a limited basis. This allows the trnch to settle over the winter. Some plumbing systems are gravity operated, and require a slope so the waste or water will flow unaided to the discharge location. Backfill definition is - to refill (something, such as an excavation) usually with excavated material. Covers on potable water wells shall be sealed, except where the top of the casing well or pipe sleeve is ele- vated to at least 1 foot (305 mm) above the design flood elevation. specified backfill material. 2 Definitions A. Once the pipe is adequately backfilled and compacted, the trench can be filled up to grade, per the project specifications. 7 proposed tracer wire terminal box proposed concrete slab proposed concrete sidewalk proposed asphalt parking lot, by others proposed. Under a grassed area, you could simply backfill with soil. On that note, if you do not have a water main insurance policy, before you buy one contact a plumber to get a rough estimate on trenchless water line replacement. Scoop out the grass and dirt with a shovel and keep it on another tarp. At the low end of the trench, dig a dry well about 2-4 feet wide and 3 feet deep. METHOD 1 BACKFILL. References (1) Doughboy: Below-Grade Pool Installation Instructions. The Department cannot grant approval of OWTS for commercial developments or multifamily residences without concurrence by the Regional Board. Water shall be induced starting at the point of lowest elevation of the trench and work up along the trench. Get fair costs for your SPECIFIC project requirements. This process is repeated a number of times. That figures to about 1 man-hour per 4 feet. The UPC has you backfill 12" in multiple "layers" compacting as you go while the IPC has you backfilling 6" then compacting then another 6" then compacting again. not exceeding. Additionally, the fill material should not cause movement of the pipe or damage the pipe joint. Don’t be too eager to backfill: Make sure you don’t need to run any more pipe in a trench before you backfill, think about whether you can lay a lateral line in the same trench. The different sands and soils alternate until the lower backfill strip tops off at 30cm above the sewage line. The first back-fill should be washed, crushed rock or gravel that is 3/4 to 1 1/2 inch in diameter. TECHNICAL REPORT DOCUMENTATION PAGE With CLSM backfill, trench from 10 ft to 61 ft. Place backfill uniformly around bridge foundations. The requirements more specifically address already established practices for trench backfill to be all-inclusive in similar roadway restorations. This can sometimes mean deep excavation, rock cutting, even pumping stations. I have never really installed water and gas lines in the same trench but don't see how it would matter if the trnech was 18" to 24" wide. trench excavation and backfill slope per osha min 10' cover safety standards away from casing r&m consultants, inc. When a trench excavation is being planned for any purpose, a thorough search should be made for information about any existing utilities adjacent to or crossing the line of the planned trench, including their sizes, locations and alignments. The contractor shall submit the physical and chemical characteristics and properties of the Bio-Polymer with the quality control plan. The trench or tunnel centre line shall not deviate from the required. Backfill cells formed by crib members and the space between crib walls and limits for structure excavation. Sand that is backfilled around electric substructures should be a significantly different color so as not to get. When is comes to backfilling, there are several methods in the construction industry to achieve the same results. The material also should be free of roots and other organic material. standard utility specifications and details for water, sewer, and storm drain board of public works city of lewes p. The water for the compaction will be added uniformly. You may find that the cost quoted is significantly less than the estimates the insurance company is quoting you to dig up the line and replace it. Final grade of the ROW will be restored and the permanent water bars will be installed. The dirt settles slowly, in early years bulging up, and in later years settling below the normal ground level. The barn was seeing 3-4 times the amount of run-off water that the little Spee-D drain could handle. The sides of the trench shall slope back to provide a stable slope for the. Most of the underground utilities are live systems, such as electricity, water, sewer and gas, and can. the backfill of the trench will be completed. 01 SECTION INCLUDED A. Gaps 50 to 1000 feet wide shall be left at intervals of about 500 feet to provide for natural circulation or drainage of water. Place lifts no greater than 8” loose material. Where rivers carrying water during construction are to be crossed, the Contractor will have to excavate the pipe trench under water. The trench was 21 inches wide by 60 inches long and 7 feet deep. Section 19 – Trench Excavation, Bedding and Backfill 19. 08 Corporation Stop 93. Starting at the lowest point, dig a base trench the length of the wall. 3' below ground. Slurry is the best backfill material to use when completely burying an above-ground pool since it can better support its own weight. I opened up the concrete and replaced an entire section of about 15' of the drain line with 2" ABS pipe. • Excavate in street a trench approximately 2 ft down by 2 ft wide by 16 linear ft and continue trench up the hill approximately an additional 15 linear ft. Water and natural gas lines shall not share the trench with the Cooperative’s electric lines. Backfill and compact around all existing utilities to 100 Percent Standard Proctor Density in lifts not to exceed 6 inches. Yep, that is why the NESC requires separation from the gas line of one foot. Water is typically added to increase the efficiency of the compaction and cohesion of the backfill material, enough to reach the proper moisture percentage as determined from the materials proctor curve. I'm digging a trench for laying a duct for a new pipe connection (and get rid of old lead pipes). 6" pipe dia. Use pinch bars or tongs for aligning or turning the pipe only on the bare end of the pipe. The trench has to be 59" deep and usually 18" wide. One adult in reasonably good shape may expect to dig a sewer trench 4 feet deep by 8 feet long by 3 feet wide in one weekend of long workdays. When water is pooled in the trench, the author recommends placing large cobbles in the form bottom and compacting them down into the mud. Technical Specifications for Water and Sewer Service Lines Water and Sewer Line Bedding and Backfill: Drawings show cross-section of trench, pipe laid on top of 6" min. There are also depth requirements for the various utilities. All water and equipment. In heavy clay soils, several lines of perforated pipe may be needed to speed drainage. Shut off the water that feeds that line and, using proper adapter fittings, cut into the water line and connect the polybutylene, copper, or plastic line from the yard hydrant into it. Ground Water. Thats the basic concept astern a French drain, a slightly sloped trench filled afterward circular gravel and a pipe that diverts water away from your house. Run pipe up to the trench level outside and drill a hole through the basement wall. Re: Backfilling an Above Ground Pool we used to have an AG buried half way in the ground. Proper bedding and backfill procedures can include the following steps: Making sure the bottom of the pipe trench has a good foundation. Consumer Confidence Reports; Backflow Prevention; Drinking Water – Additional Resources; Water. The water line to your building is a vital part of your infrastructure: but what if it stops working? Today we look at the problems that cause the need for replacing the water supply line and focus particularly on the excavation process and the costs that can turn a basic open cut trench into an expensive process requiring heavy machinery. Standard recommendations include: Backfill trenches and excavations immediately after the pipe is laid, Select and deposit backfill materials with special reference to the future safety of the pipes. 1 SCOPE OF WORK The work covered by this Section consists of loosening, loading, removing, and disposing of, in the specifiedmanner, all wet and dry materials (including rock) encountered that. Any trench that’s 3 feet or deeper requires special safety considerations. If the top of the culvert extends above the original ground line, Backfill operation will continue to the top of the culvert and for a width of 3 m on each side of the culvert to the full width of the roadway embankment. trench as practical at a point level with the top of the pipe. 57 stone MUST be capped with a minimum of 4" crusher run prior to placement of pipe or box culvert. For parallel trench backfill over 50' in length it may be 100% ABC if approved by City Civil Inspector. If it is a deep trench, you should refill it in layers and then tamp it down. Most builders have a good handle on foundation waterproofing, but while that's crucial, it's also the last line of defense. Timber Shoring Left in Place: Untreated oak. Backfill trenches and excavations immediately after the pipe are laid, unless other protection is directed or indicated. Valley Supply is a distributor of high quality Concrete Accessories and Restoration Products. He was using a steel bar to poke at the side of the trench to locate the sewer main when the walls began to fail. The trench or tunnel centre line shall not deviate from the required. 3 Apply another layer of Bentonite 25-50mm (1-2 inches) thick. French drains are simply a trench which is dug, ideally, perpendicular to the slope with a pipe in the bottom and the entire trench is then backfilled with USGA specification sand. n Provide and place sufficient padding sand at the edge of of the trench along the entire length to provide 12 inches of cover. When the service line is laid in the prepared trench, special care shall be taken to insure that minimum radius is maintained on plastic and copper service. trench detail for. The water for the compaction will be added uniformly. Clay pipes are prone to impact damage from such things as large stones or a half brick coming into contact with the pipe during the back fill process, settlement to the sub-soil beneath the pipe can lead to stress fractures and collapse it is therefore necessary to ensure that the pipe work is bedded an an appropriate granular material. Please note all backfill material must be approved by the Hydro Ottawa Inspector. The proper sequence of excavation and backfilling is required to optimise the process and prevent safety issues. Section 19 – Trench Excavation, Bedding and Backfill 19. This feature is not available right now. Trench and pavement restoration shall include all backfill, compac-tion and resurfacing. The material also should be free of roots and other organic material. EXCAVATION, TRENCHING, AND BACKFILLING FOR UTILITIES. material shall be rounded over the center line of trench in a neat crown. trench and backfill. Under stable working conditions, the trench must be free of water and at widths designated by the contract documents. Applications. Then back-fill to 450 below ground level for the other services, these should not be directly above the water (to allow ease of future excavation). Workers were draining the trench using a pump. nrCs specifications called for the tires to be 8 feet in diameter. For parallel trench backfill over 50' in length it may be 100% ABC if approved by City Civil Inspector. Trench backfill starts one (1) foot over the top of the pipe. It is essentially a trench that is dug to any depth and filled with gravel and possibly a perforated drain line. 5 TRENCH BACKFILL Trench backfill for piping consists of three (3) zones: foundation, pipe embedment, and backfill. 3 Backfilling Backfill shall be free from discarded construction material and debris. The thickness of backfill depends on the desired trench depth. I'm about to fill in the trench (12" wide) and patch the concrete. 5 meters depth under soil cover. The final meter of backfill must be 100% compaction. Of these, 16 were approved and included in this revision. The water line to your building is a vital part of your infrastructure: but what if it stops working? Today we look at the problems that cause the need for replacing the water supply line and focus particularly on the excavation process and the costs that can turn a basic open cut trench into an expensive process requiring heavy machinery. Call the local area utility locator company, give them the location or the route and depth of the proposed excavation and request utility locations. • Excavate in street a trench approximately 2 ft down by 2 ft wide by 16 linear ft and continue trench up the hill approximately an additional 15 linear ft. This work shall consist of the excavation and backfill of trenches for the accommodation of substructures including, but not limited to electrical conduits, telephone conduits, television cable, traffic signal conduits, gas lines, sewer lines, water lines, and storm drains except where governed by utility agency specifications. Skip navigation Sign in. The line connecting your sprinkler line and main water line will need a shut-off valve. 16-2 MATERIAL Pavement sections and all excavated backfill shall conform to the requirements on. Re: PIPING IN COMMON TRENCH True! You can have them in the same trench even if they aren't approved for use under the building. Do not allow water to accumulate in excavations. r 1” water service assembly (for residential only) 17 direct tap for ductile iron pipe 18 1 1/2” water service assembly 18. Any advice on this would be great. The backfill material must not contain large boulders, which do not compact and could damage the pipe. pipe, including any excavated and subsequently backfilled trench that the utility line or pipe was constructed or laid in. Minimum trench widths must be achieved to ensure. Laying pipeline along high - voltage transmission lines A parallel distance of 25 meters between the pipeline and the power lines must be maintained. The joint trench shall be excavated and backfilled to NOVEC's and other joint trench occupants' specifications. If this third pile has many large rocks, or is a clay based material or red pan, or any material that retains water, you should avoid using this as backfill against your inground pool walls. I rented a trenching machine the first time I had to dig a trench in my yard, and it made digging the trench a piece of cake. 12 sloped trench erosion control 13 thrust blocks 14 anchor blocks 15 sloped pipe anchor blocks 16 3/4” water service assembly 16. Therefore, it is necessary to implement it in accordance with the construction specifications as far as possible. Make sure that the trench line is carefully and professionally protected on both sides to avoid any accidents. backfill above the pipe zone. Procedures For HDPE Pipe Pressure Testing Outside The Trench: • If specified by the engineer, pressure testing may be conducted prior to pipe installation. Most builders have a good handle on foundation waterproofing, but while that’s crucial, it’s also the last line of defense. Seed or sod the swale. Overlap the filter fabric on top of the gravel. The trench is about 1m deep - I'm about to complete the job which involve laying some sand on the bottom of the trench to accommodate the 100mm duct with a 25mm pipe inside the same duct. :Concrete Floors on Ground, published by the Portland Cement Association, recommends backfilling underfloor utility trenches with soil like that surrounding the trench, and compacting the soil in layers to duplicate moisture and density conditions in the adjacent soil. Customer-owned fuel lines, including natural gas, oil and propane lines are not permitted in the joint trench. I think you only need to turn 90 degrees to see your target (also a good habit to make sure no one is behind you). select backfill material compacted to 95% aashto density to springline of pipe (all locations) see applicable pavement repair detail for trenches located in paved areas. Minimum trench widths are dictated by the amount of space necessary to ensure haunching zone materials can be completely and safely placed and compacted, while maintaining trench wall stability. Sewer or septic line replacement or installation: backfill requirements and procedures, Details of Final backfill over a new sewer pipe Step by step main drain line or sewer or septic line backfill procedure, Questions & answers about backfill procedures & specifications when replacing a sewer or septic line or pipe. Use care not to injure pipe linings. Maintain water level below pipe bedding. 3Drive stakes or re-bars through the bales (two per bale). The trench dams shall be carefully compacted and shall be 6 feet (1. When water is pooled in the trench, the author recommends placing large cobbles in the form bottom and compacting them down into the mud. The payout per linear foot can range between $4 and $12. water main line. Starting at the lowest point, dig a base trench the length of the wall. My first trench was dug by hand by 2 men. Bedding material for the backfill must be approved by a District representative. Electrical will need to be kept well away from water and sewer. Muck and water may fill the spaces between stones, but contact between the stones will pro-vide bearing. Note: No electric lines, primary or secondary, may be placed under a concrete foundation or slab. 01 GENERAL A. 02 DESCRIPTION OF WORK A. The SOL 481-13-03 gives direction on using PennDOT specifications (Section 601-Pipe Culverts) for trench backfill, including subsurface utilities. 02 Existing Material in Trench Materials excavated during trench construction may be considered for reuse as trench backfill where permitted under clause 4. Installation of ADS pipe is in most respects very much like that of any quality pipe installation. Suitable material shall be defined as a mineral soil free of foreign materials (rubbish, organics, and debris), frozen clumps, oversize stone, rock, concrete or. Before filling with dirt, I put some flagging tape on top of the sand running the length of the trench to locate the pipe if someone digs in the trench. Excavation and backfilling of soil is a very important part of. When it comes to trench Backfill, the specification usually allows the contractors several choices for filling the area over the pipe and under the pavement. On that note, if you do not have a water main insurance policy, before you buy one contact a plumber to get a rough estimate on trenchless water line replacement. Re: how much sand to backfill waterline trench? When I back filled our water line, I put in about 6-12 inches of sand. Lay the new PVC pipe in the trench, using connectors and PVC glue between each length of pipe. The standard trench clearance b’ (see figure 3. National Grid Obligations n Inspect for trench specification compliance. provide adequate room for jointing the pipe in the trench and compacting the pipe zone backfill at the haunches. Your takeoffs can be performed either with a digitizer or with the keyboard. Backfill trench to a compacted depth of 1 foot over the pipe with clean earth fill. in rocky or unyielding soil, the trench shall be excavated a minimum of. Serving Tacoma & Surrounding Areas. The back-fill material shall be free of rubbish, frozen material, broken pavement, other debris,. Payment: Trenching and backfilling for utilities will be paid for as part of the indicated Contract unit prices for the associated piping, conduits, ductbanks, and utility structures. The work to be performed in accordance with this section includes the excavation, trenching, backfilling , and surface repair for all pipelines, pipe culverts, box culverts, accessories and lines connected thereto,. C Water Pipe Water pipe minimum and maximum trench widths shall be as shown on Standard Drawing. 4 Carefully backfill and compact the remainder of the trench. I need something that I can lay down around the entire pipe since there are a lot of rocks below the pipe on the floor of the trench. Above that, it would depend what is on top of the trench as to how you'd backfill the rest of the trench. The Soil Separator Trench Wrap is used to separate gravel and soil backfill in a trench, allowing the gravel to remain porous and the soil to stay firm and intact. The filling of the trench and the tamping of the backfill shall be carried on simultaneously on both sides of the pipe in such a manner that the completed pipeline will not be disturbed and injurious side pressures do not occur. all pipe and fittings, and accessories furnished by the contractor shall be new material free from rust or. Don't throw any construction debris of any kind into the trench to use as filler, as decomposing wood and other construction materials can increase the acidic soil level, which over time will eat into the copper pipe. I want to get the line on my drive fir a few reasons: the old line is crap thin wall 1" PVC and one undetected break already cost me $600 in water bills. 3 Construction 608. n Provide and place sufficient padding sand at the edge of of the trench along the entire length to provide 12 inches of cover. Each tank also required a gravel apron at least 8 inches deep extending 5 feet from all sides of the tank. diameter or fraction there of. DON’T let the feed and return lines touch each other. 1) is given in table 4. Excavation in Streets. Draining trench water into sanitary sewers will not be permitted without a dewatering permit from the City and from the Metropolitan Council. This is a cementious material with a low water/cement ratio that is delivered to the jobsite by a ready-mix truck. Obviously it would be best to backfill with ¾" rock, so any water could drain freely to the drain tile at the bottom of the wall. 0 Sand Backfill Sand is the typical and preferred trench backfill component. Re: How to backfill after laying waste lines under basement floor There is a slight difference between the UPC and the IPC when it comes to backfilling. We didn’t want to pay him extra for the backfill, nor did we feel right about the idea of asking him to do any extra work for no charge. I'm using 1" black pipe from the lake to the house.