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Now viewing articles posted in 2018.

  • How is a map projection like an orange peel?

    July 31st, 2018 by Josephine Hatton


     

    You may remember your eighth-grade science teacher explaining map projections using the orange-peel analogy: imagine the Earth is an orange.  In order to draw a map of the surface of the orange, we have to find a way to flatten the peel onto a flat piece of paper or computer screen.  But the orange is a sphere, so the only way to do that is to stretch or cut the peel in some places.  Unavoidably, that stretching causes distortion.

     

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    There are lots of ways to do this.  The more you cut the peel up into small pieces, the easier it is to flatten them without too much stretching—but you’re left with a mess of little pieces.  If this is a map, it won’t be a very convenient one.  But if you leave the pieces large, or don’t cut the peel at all, then it will have to stretch a lot to flatten onto the page. 

     

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  • Massachusetts MS4 General Permit Now in Effect!

    July 5th, 2018 by Nick Cristofori


     

    The 2016 Massachusetts Small MS4 General Permit is now in effect as of July 1, 2018 after a 1 year postponement.  Similarly, the 2017 New Hampshire Small MS4 General Permit is also in effect as of July 1.  Regulated communities and other non-traditional MS4s (Massachusetts, New Hampshire) now have 90 days

     

    Once completed, permittees will need to work towards preparing additional deliverables between now and June 30, 2019 such as a Stormwater Management Program (SWMP) Plan and Illicit Discharge, Detection, and Elimination (IDDE) Plan. 

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  • CEI Wins Best Firms to Work For - Geotechnical Engineering

    June 25th, 2018 by Rob Cote


     

    We are proud to announce that CEI has once again ranked nationally by the Zweig White Group as a Best Firm to Work For, placing #1 in the Geotechnical Engineering category. Insights from employees are compiled and given scores to determine the Top Firms. The firms are then recognized for their outstanding workplace atmosphere, teamwork, work/life balance, benefits packages, amenities and culture. CEI would like to give a big thank you to our staff, clients and many supporters for making it possible for us to win these prestigious awards.

     

     

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  • Top 15 Uses for GIS

    June 18th, 2018 by Josephine Hatton


     

    Wait, what?  What is GIS?

    GIS stands for Geographic Information Systems.  It refers to mapping technology that brings together hardware (computers, mobile devices, GPS units) and specialized software to collect, analyze, and model data about the world around us.  It has almost unlimited applications in the public, private, and non-profit sectors. 

    1. Mapping municipal, state, and federal infrastructure 

    GIS is an excellent tool for mapping various types of infrastructure at a range of scales, allowing the user to see them all in their relative locations, with all their associated data.  

     

    With GIS a town can make a map showing the location, diameter, material, age, and flow direction of all the water conduits under their streets, along with hydrants, valves, pump stations, catch basins, outfalls, and so on.   

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  • PWW Watershed Cleanup

    June 14th, 2018 by Rob Cote


     

    For over 20 years, CEI has worked closely with Pennichuck Water Works on water quality and watershed protection initiatives. Projects have ranged from the engineering and construction of best management practices, sediment studies, long-term management planning, and public education. But it’s not all business, this past Saturday CEI joined forces with Pennichuck on a beautiful day for their 1st Annual Watershed Cleanup Event! With CEI serving as a Platinum Sponsor, the group set out early Saturday morning in an effort to

     

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  • CEI Presents - Stormwater BMPs

    June 6th, 2018 by Rob Cote


     

    As part of a Specialty Conference Series, the New England Water Environment Association (NEWEA) hosted a Stormwater Specialty Conference & Exhibit: "Enhancing Stormwater Resilience in the Built Environment". At this technical conference, CEI's own Nick Cristofori, P.E. gave an informative presentation on the Design and Construction of Resilient Stormwater BMPs to Address Climate Change and Improve Water Quality

     

     

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  • NPDES MS4 Notice of Intent

    May 29th, 2018 by Nick Cristofori


     

    With the NPDES MS4 Notice of Intent (NOI) filing due in only 4 months, EPA has compiled a training video to assist communities with completing the form.  The NOI forms the basis of your Phase II program and lists the Best Management Practices (BMPs) you will implement to meet permit requirements, identifies responsible parties for each proposed measure, along with other supporting tasks.  The video is approximately 30 minutes long and generally discusses how to do the following:

    • Complete each section of the NOI;
    • Meet endangered species and historic property requirements; and
    • File with EPA and state agency. 

     

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  • CEI Receives Prequalification for Geotechnical Services

    May 21st, 2018 by Rob Cote


     

    CEI is proud to announce the expansion of the firms’ prequalified services for the Massachusetts Department of Transportation (MassDOT) to now include Geotechnical services. CEI was recently approved for this new discipline adding to the existing categories of bridge design, roadway design, hydraulics & hydrology, hazardous waste remediation, wetlands and water quality.

     CEI has successfully completed dozens of task orders for MassDOT through the years that have included stormwater BMP design, regulatory review, statewide guidance development, and water resource consulting.

     

     

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  • Are You Ready for MS4?

    May 16th, 2018 by Nick Cristofori


     

    Only a little over 7 weeks remain until the new NPDES MS4 permit becomes effective!  Are you ready?

     

    By now, hopefully you’re aware that the new permit goes into effect July 1, 2018 and “starts the clock” on completion of Year-1 requirements.  Even though the first action item, the Notice of Intent (NOI), isn’t due until September 29, 2018, we highly recommend that you begin its preparation during the next couple months.  

     

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  • Top 6 Invasive Aquatic Plants in New England

    March 28th, 2018 by Bob Hartzel


    New England’s lakes and ponds host a great variety of native plants that are an important part of a healthy aquatic ecosystem.  Non-native species can disrupt these ecosystems by spreading aggressively and displacing beneficial native species.  These plants can also impair swimming, boating, and fishing, and can contribute to water quality problems as large amounts of organic matter decay at the end of each growing season. 

    The guide below summarizes the key identifying features of the six non-native plants most commonly found in New England lakes and ponds.

     

    Variable milfoil (Myriophyllum heterophyllum)

    Variable watermilfoil is a submerged aquatic plant that grows in depths of up to 15 feet.  This plant has reddish stems with whorls of 4-6 feather-like leaves that are about 2 inches long and 1 inch wide.  As shown in the photo, the plant also produces a prominent spike-like flower (3-6 inches long) that emerges above the water surface by late June or July.

     

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