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  • Calling All Engineers Who Will Fix Alaska’s Sewer Woes
    hefty infrastructure problems by tapping the competitive spirit of water and sewer engineers The Alaska Water and Sewer Challenge launched two years ago asked experts from around the world to propose an efficient small scale wastewater treatment system that could be useful in small villages around the state The third phase of the competition began in December At this point three finalists remain Each has developed plans for giving individual homes living off the grid the ability to have the amenities of sanitary in home running water without costing the water user or the system developer too much money KTUU reported In phase three three teams have 900 000 each to develop and test prototype systems over the next two years KTVA reported Access to sewage service is fraught with problems in Alaska Some villages lack flushing toilets and clean water making residents more prone to illness State project organizers spelled out the regional challenges that prompted the competition Over 3 300 rural Alaska homes lack running water and a flush toilet Many more depend on aging and deteriorating piped and haul systems Lack of in home water and sewer service in rural Alaska causes severe skin infections and respiratory illnesses Residents of Southwest Alaska suffer rates of invasive pneumococcal disease IPD that are among the highest in the world To correct this public health problem agencies have funded conventional community wide piped and truck haul systems Although these systems work they are expensive to construct and many communities cannot afford their high operational costs In essence the competition is working to end the honey bucket system currently used in about 30 rural communities KTVA reported Contestants have already put two years of work into their proposals In that time they developed a proposal to build a prototype wastewater system

    Original URL path: http://www.wateronline.com/doc/calling-all-engineers-who-will-fix-alaska-s-sewer-woes-0001 (2016-02-14)
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  • Sewers and Sewer Line Maintenance News Documents on Water Online
    5 2016 The current crisis in Flint Michigan is a stark reminder of the essential value of water and the role of water infrastructure in protecting the health and well being of all people Trelleborg Improves Performance And Reduces Costs With New Integrated Pipe Seal For Irrigated Pipes In The Us 2 1 2016 Trelleborg s pipe seals operation has launched a new generation of integrated pipe seal for irrigation pipes in North America Record Jacking Pipe Installed In Denver 1 26 2016 The City and County of Denver is installing a new storm sewer system in the Curtis Park neighborhood that runs from the South Platte River down 33rd Street to Downing and on to Lafayette EPA Estimates 271 Billion In Wastewater Infrastructure Needs 1 22 2016 In Albany NY some water pipes are so old they were laid when Rutherford B Hayes was president EPA Survey Shows 6 1B Needed For Recycled Water Infrastructure 1 19 2016 The U S Environmental Protection Agency EPA released a survey January 13 showing that 271B is needed to maintain and improve the nation s wastewater infrastructure including the pipes that carry wastewater to treatment plants the technology that treats the water and methods for managing stormwater runoff Trelleborg Launches Innovative Non Integrated Seal For IPS Pipes 1 15 2016 Trelleborg s pipe seals operation introduces a new non integrated locked in sealing system to its portfolio the F 552 Anger Lock EPA Survey Shows 271B Needed For Nation s Wastewater Infrastructure 1 13 2016 The U S Environmental Protection Agency EPA recently released a survey showing that 271B is needed to maintain and improve the nation s wastewater infrastructure including the pipes that carry wastewater to treatment plants the technology that treats the water and methods for managing stormwater runoff A

    Original URL path: http://www.wateronline.com/hub/bucket/sewers-and-sewer-line-maintenance-news (2016-02-14)
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  • Consultant’s Corner Top 5 Requirements for Good Modeling
    further develop the flood modeling community as well as opportunities to make new contacts and refresh existing ones Many of the presenters shared knowledge on how to carry out good modeling From these presentations I identified five common requirements for good modeling Good data Good software Good modeler Good planning Good communication of modeling outputs Good data Data sources for flood modeling include surveyed dimensions of concrete structures surveyed natural features such as channel sections and terrain hydrometric data and softer data such as Twitter feeds The data may originate from official sources and from the community Making best use of the potential immense amounts of data is a challenge we need to be able to identify the data sources that will be most useful using the good data and not using the misleading data The concept of too much data particularly for outputs was also raised at the conference Good software A range of software tools are available today and it is unlikely that one single product can provide all the functionality for most projects Linking of computational software is important as is the use of standard formats to allow the same data to be accessed in multiple software products Flood Modeller Pro and associated products were seen as being good flexible software which allows the modeler to schematize the real world and have fun modeling Good modeler Good modelers need to know much more than just which buttons to click within the software including knowing the limitations of software tools and being able to assess the results to see if they make sense hydraulically They also need to have the imagination to work out how to best represent the real world with the toolkit provided by the software available A collaborative attitude is important too not just with other members of the current project team and client but also with previous teams who worked on the same location Problem solving skills are essential including the ability to assess different approaches and decide which approach is best for the needs of the project Good planning The importance of the initial planning phase within a modeling project was reinforced by the presenters During this phase it is important to understand the likely hydrological and hydraulic characteristics of the project area This together with knowledge of the objectives of the project will help define the schematization such as which areas should be modeled in 1D 2D or linked 1D 2D Grid sizes can be defined and link line positions identified It is important that the modeler and their client agree the appropriate level of detail for the project This may require certain compromises to be made The approach to calibration can also be agreed probably starting with an in bank calibration before moving on to the floodplain calibration Good communication Finally effective communication of modeling outputs was also discussed The outputs need to be presented with simple clarity to enable appropriate and timely actions This is particularly important in emergency response

    Original URL path: http://www.wateronline.com/doc/consultant-s-corner-top-requirements-for-good-modeling-0001 (2016-02-14)
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  • Utilities In Search Of Direction Look No Further
    plan Nutrients This year WEF is launching its Nutrient Roadmap to help utilities not only remove nitrogen and phosphorus from waste streams thus protecting vulnerable waterways and reservoirs but also capture and recycle them as fertilizer Phosphorus in particular is an issue because it forms pipe clogging struvite yet is an irreplaceable and finite resource for agriculture By removing that phosphorus we solve an internal plant problem while making revenues at the other end by selling the phosphorus said McCormick I would envision more and more of that happening Energy The forerunner to the Nutrient Roadmap was the Energy Roadmap which didn t come first by accident at this juncture using less energy is perhaps the most essential and accessible ingredient to successful treatment plant operations The first step is energy management It s easier to save a watt than to produce an additional watt McCormick noted Meanwhile great strides are being made in energy recovery About 80 percent of the energy that comes to us in wastewater is thermal energy versus about 20 percent that is chemical said McCormick citing a recent study by WEF and the Water Environment Research Foundation WERF Historically our industry has gone after that 20 percent There s a lot of fertile ground for us to recover the heat from the wastewater Depending on the time of year our collection systems can be a heatsink in the summertime for cooling buildings and in the wintertime for heating buildings and anaerobic digestion Stormwater Stormwater is big and it s becoming bigger said McCormick Evidence of this fact can be seen in utility and regulatory focus on combined sewer and sanitary sewer overflows CSOs and SSOs massive citywide green infrastructure plans à la Philadelphia and the annual Stormwater Congress a tailored program within WEFTEC that gets larger each year And of course because of storms What used to be our 100 year storm seems to be happening all too frequently When you have two or three 100 year storms in five years what you re realizing is that the data we re using is not updated McCormick stated Whether it s much less or much more precipitation we re experiencing more intense weather patterns Water Reuse If you speak with anyone from WEF you won t hear the term wastewater treatment plant but you will hear water resource recovery facility The shift in wording is a conscious effort to create cultural change to expunge preconceived notions about the old WWTP and reset the way utilities policymakers and the public perceive these facilities as WRRFs It s about creating energy from wastewater saving and repurposing nutrients and recycling water to bolster dwindling supply The trend toward municipal water reuse is well underway but is nascent relative to its potential To help advance adoption WEF s next roadmap will cover water reuse according to McCormick No utility gets there alone however There are stepping stones to reach these points of sustainability I don t think we ve had

    Original URL path: http://www.wateronline.com/doc/utilities-in-search-of-direction-look-no-further-0001 (2016-02-14)
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  • Stormwater Management Articles Documents on Water Online
    when it comes to stormwater the community relies on the combined efforts from an ensemble cast of characters to help prevent pollution as seen on StormTV Climate Change Ramifications For The Water Industry 12 22 2015 Climate change isn t going away not in the literal sense not in public discourse and probably not as a point of contention While the big picture initiative arising from COP21 was to halt global warming at 1 5 C there are many smaller more personal but no less important initiatives being taken on by water and wastewater professionals Consultant s Corner Top 5 Requirements for Good Modeling 12 17 2015 Dr Jon Wicks CH2M s Global Technology Leader for flood risk modeling shares his thoughts on the requirements for good modeling building on discussions held at the recent Flood Modeller Suite Conference Greater Chicago Historic Infrastructure Projects Enhance Windy City Water Quality 11 23 2015 Chicago is giving its oldest wastewater treatment facility a disinfection facelift and using the world s largest reservoir to curb combined sewer overflows Project Clean Lake Breaks New Ground In Pollution Control 8 31 2015 The Northeast Ohio Regional Sewer District s 3 billion pollution control plan includes massive and lengthy tunnels but goes the extra mile by adding advanced wastewater treatment Utilities In Search Of Direction Look No Further 8 31 2015 The Water Environment Federation WEF is harnessing both natural resources and human drive to lead an energy surge in the water sector WEF President Ed McCormick discusses where the industry is headed and how utilities can stay ahead of the curve Super Advice From Philadelphia s Water Commissioner 8 18 2015 This Q A is longer than my usual for Water Online but the exception is warranted It s not often that you have the

    Original URL path: http://www.wateronline.com/hub/bucket/stormwater-management-articles (2016-02-14)
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  • Stormwater Wetland Reduces Sewer Overflow By 84 Percent
    a common detention basin for storage of sewer overflows This led to the concept of an engineered stormwater wetland and resurrection of The Great Swamp Project Solution Result The value of the wetland is felt by Cambridge s citizens Public health is improved through reduced sewer system overflows and sewer backups into basements Nuisance flooding in the public right of way is reduced Citizens are also recognizing an increase in their quality of life The wetland features walking paths boardwalks disabled access an amphitheater and educational signage Background and Execution Since 1998 MWH has been engaged by the Cambridge Department of Public Works to engineer a sewer separation project in Massachusetts The sewer separation project lies within the Alewife Brook watershed features an engineered stormwater wetland The wetland was completed in October 2013 as part of 117 million in ongoing construction that will reduce combined sewer overflows from the city s CAM 004 area by 84 percent 43 6 million gallons annually The role of MWH in this project began with creation of the city s first hydraulic stormwater model using Innovyze s a subsidiary of MWH InfoWorks software This critical tool allowed for an integrated analysis of the watershed s natural and piped systems and recommendation of the wetland The resulting project will treat urban runoff from 400 acres of dense residential and commercial land adjacent to the city s Fresh Pond potable water reservoir It also achieves peak flow attenuation so that flooding along the Alewife Brook in downstream communities such as Arlington and Somerville is not exacerbated The new wetland is an ecological filter with physical and biological treatment In the first stage fine sediment is allowed to settle in an articulated concrete block forebay where the resulting sediment is trucked out for disposal Stormwater then winds its way through a vegetated swale before entering the main basin where wetland biota remove nutrients and other pollutants This journey improves water quality at the wetland s outlet to the Little River and further downstream in the Alewife Brook The wetland also provides stormwater storage and is surrounded by a six foot earthen berm designed to retain a 10 year event A series of passive stormwater management devices bending weir vortex throttle downstream level controller and multiple flap gates optimize storage by regulating water levels and flow rates in upstream pipelines The pipelines also feature BMP catch basins flushing systems and deep sump manholes to capture grit and floatables The 3 5 acre wetland is sited in the Alewife Reservation conservation land that was once noted by 19th century naturalist William Brewster as The Great Swamp The design included environmental engineering to minimize the construction and long term impact to the ecology and aesthetics of this valuable open space A significant regulatory coordination effort was undertaken to achieve a consensus on the wetland s function configuration and impact on hydrology and water quality The wetland was also conceived to add biodiversity and encourage the return of native wildlife Over

    Original URL path: http://www.wateronline.com/doc/stormwater-wetland-reduces-sewer-overflow-by-percent-0001 (2016-02-14)
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  • Using Technology And Best Business Practices To Make The Best Use Of Resources And Save Public Dollars
    GIS allowing for spatial data and relationships to be fully understood and used to create viable maintenance plans Further using technology as a tool for improving the planning organizing and scheduling of work the Division utilized a combination of technology and manual processes to develop maintenance routines to address the goal of planning at least 80 percent of their work and concentrating on the significant few that have the largest impact on their organization From their initial effort of defining their activities with resource needs levels of effort and knowing what they are responsible for they were able to develop routines for the majority of their work activities They now know the what how where and when of their maintenance work For example with the activities of right of way mowing tree trimming sidewalk repair and ditch cleaning they utilized GIS to establish routines and create operational blocks for efficient execution by maintenance resources The top activities were mapped and scoped to quantify their efforts Most operational blocks were based on the amount of work that can be produced in a two week time period which correlates to the time period established for the short term scheduling process that has been established With known quantities and established average daily productions they are able to calculate productions and levels of service for each activity Through this the Division is able to measure the effectiveness of field crews and create accountability For mowing operational blocks were established that have the acreage to be mowed in a specific time period For tree trimming they have operational blocks with specific linear feet of trees to be trimmed Figure 1 1 illustrates the developed operational blocks for right of way mowing For canals they measure the linear feet of canals to be cleaned The Division has also developed operational blocks for hand slope and canal mowing As a result of the establishment of operational blocks and routines for several of their maintenance activities levels of service have increased by doing more work within the same or less resources For example right of way mowing cycles have increased over 48 percent with some units doubling their turns as compared to before the implementation of the operational blocks They have also developed a routine for canal cleaning which will allow their canal system to be maintained on five year cycles where before there were portions of the system that had no maintenance recorded since maintenance records have been kept Figure 1 1 Right of way Mowing Operational Blocks Other technologies were also established and are currently being utilized to accomplish recommendations from the game plan and achieve their goals For example as the result of the Service Unit s maintenance yards being geographically too far apart to meet bi weekly remote web based meeting technology like GoToMeeting is now being utilized to review previous bi weekly schedules complete audit work establish work schedules and increase communication and cooperation between groups As a result the Service Units can

    Original URL path: http://www.wateronline.com/doc/using-technology-and-best-business-practices-to-make-the-best-use-of-resources-and-save-public-dollars-0001 (2016-02-14)
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  • Grundfos Pumps Of Houston Solve Decades-Old Storm Water Problem In Texas
    ample flow can cause blockage that affects hurricane evacuation routes Because of this the city s main priority during major storms is to keep the routes clear and passable Recently city officials and the Texas Department of Transportation turned to Grundfos and its line of Axial Flow Submersible Pumps to solve one such flooding issue that had plagued the city for years Beltway 8 is one of the few main highways used to evacuate residents from the south and southwest during a hurricane For decades the Spencer Road exit has suffered from surface water flooding On several occasions the designated evacuation route was left impassable In cooperation with the Texas Department of Transportation the city of Pasadena was able to determine that the cause of the flooding was insufficient capacity of the storm drain system In storm drain systems flap gates are installed at or near drain outlets to prevent the drainage system from back flooding during major storms In the case of Beltway 8 the road s 54 inch storm sewer lacked proper capacity so a flap gate valve would prevent additional water from flowing back on the road Problematically however that same safety valve would also limit flow into the drain causing frequent flooding to the roadway that would result in lane closures and extended traffic delays Pasadena had two options It could either create a large detention basin or it could increase the capacity of the storm system Both options required several million dollars as well as the allocation of real estate and years of construction The particular application of this storm water pump system was unique in that it was placed between the Texas Department of Transportation feeder roads and the Harris County Toll Road Authority main lanes in a footprint that most engineers would consider daunting said Mark Gardemal assistant director of Public Works for Pasadena We had about 25 feet to work and we were going to have to do all our pumping and piping arrangements below ground Because of restrictions on space project engineers reconsidered their initial two options Instead they decided to route excess storm water around the existing sewer and push it far enough downstream to create adequate capacity We recommended the Grundfos submersible pumps along with the CU362 and the variable frequency drive said Cory Marcotte engineering sales professional at distributor Pumps of Houston It allows us not only to maintain high efficiencies during operation but also to monitor and adjust the speed of the pump depending on how much rainfall we get at a particular time Grundfos lines of Axial Flow Submersible Pumps are specially designed to meet all industry standards Indeed Grundfos exceeds those standards in many areas including mechanical seal design longer bearing life unique cable entry system and premium efficiency motors that reduce power consumption and save energy The energy efficient line is capable of pumping up to 150 000 gallons per minute and features a compact design as well as construction cost savings of up

    Original URL path: http://www.wateronline.com/doc/grundfos-pumps-of-houston-solve-decades-old-storm-water-problem-in-texas-0001 (2016-02-14)
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