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DNREC Analysis of Brandywine River Dam Sediments Reveals Encouraging Results – State of Delaware News

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DNREC Analysis of Brandywine River Dam Sediments Reveals Encouraging ResultsDate Posted: December 16, 2020
DNREC Cancels Dec. 16 Afternoon Managed Deer Hunt at Brandywine Creek State ParkDate Posted: December 15, 2020
CVS Health Awarded Pharmacy Benefit Management Contract for State of DelawareDate Posted: December 15, 2020
December 15, 2020: COVID-19 BriefingDate Posted: December 15, 2020
Governor Carney, DPH, Bayhealth Announce First Delawarean Has Received the COVID-19 VaccineDate Posted: December 15, 2020
COVID-19 Vaccine Virtual Town Hall: Dec. 14, 6:00 p.m.Date Posted: December 14, 2020
Governor Carney, DPH Announce Arrival of Delaware’s First Shipment of the COVID-19 VaccineDate Posted: December 14, 2020
Dec. 15 Last Day to Sign Up for 2021 Coverage on Delaware’s Health Insurance MarketplaceDate Posted: December 14, 2020
Watch The Delaware Electoral Vote ProceedingsDate Posted: December 14, 2020
Delaware Taps Fund to Replace Diesel-Guzzling School BusesDate Posted: December 14, 2020
Governor Carney, DPH Announce Delaware’s Plan to Distribute the COVID-19 VaccineDate Posted: December 12, 2020
Statement from Attorney General Jennings on Supreme Court’s Texas rulingDate Posted: December 12, 2020
Weekly COVID-19 Update – Dec. 11, 2020: Surge in New Positive Cases ContinuesDate Posted: December 11, 2020
Delaware Division of Public Health Announces Availability of Free Mail-Order NaloxoneDate Posted: December 11, 2020
Governor Carney, DPH, DEMA Announce Community COVID-19 Testing SitesDate Posted: December 11, 2020
DNREC to Temporarily Close Delaware State Parks Nature Centers Starting Dec. 14Date Posted: December 11, 2020
Statement From Attorney General Jennings On Shooting Of Milford Police OfficerDate Posted: December 11, 2020
2021 Annual Prevailing Wage SurveyDate Posted: December 11, 2020
Governor Carney Announces Additional COVID-19 Restrictions to Confront Winter SurgeDate Posted: December 10, 2020
Individual, Groups, Businesses to Receive Governor’s Outstanding Volunteer Awards at Jan. 18 Virtual CeremonyDate Posted: December 10, 2020
Governor Carney Releases Government Efficiency and Accountability Review (GEAR) Board ReportDate Posted: December 10, 2020
Delaware State Parks Annual Passes, Surf-Fishing Permits on Sale Dec. 16Date Posted: December 10, 2020
COVID-19 Vaccine Update: DPH Receives Ultra-Cold Storage Unit, Finalizes Recommendations on Initial AllocationDate Posted: December 9, 2020
AG Jennings Announces Antitrust Suit Against Facebook  Date Posted: December 9, 2020
Unemployment Benefits Scheduled to Expire December 26, 2020Date Posted: December 9, 2020
Delaware to Issue Emergency Benefits for December to Eligible SNAP, TANF, and General Assistance HouseholdsDate Posted: December 8, 2020
State Treasurer Colleen Davis Appointed Committee Chair For the National Association of State TreasurersDate Posted: December 8, 2020
Hemp producers in Delaware must register growing sites annuallyDate Posted: December 8, 2020
December 8, 2020: COVID-19 BriefingDate Posted: December 8, 2020
Video Explores Four Enslaved People and An AbolitionistDate Posted: December 7, 2020
Attorney General Jennings announces $86.3 million multistate settlement with mortgage servicer NationstarDate Posted: December 7, 2020
Statement from Governor Carney on COVID-19 HospitalizationsDate Posted: December 5, 2020
Winter Weather Awareness Week – December 7-11Date Posted: December 4, 2020
Weekly COVID-19 Update — Dec. 4, 2020: DPH Continues to Announce Rise in Cases, Hospitalizations, RecoveriesDate Posted: December 4, 2020
Following federal indictment, DOJ reminds public of sexual abuse hotlineDate Posted: December 4, 2020
Governor Carney, DPH, DEMA Announce Community COVID-19 Testing SitesDate Posted: December 4, 2020
Zwaanendael Museum Decorated For The HolidaysDate Posted: December 4, 2020
Flags to be lowered December 7 for National Pearl Harbor Remembrance DayDate Posted: December 4, 2020
Governor Carney Announces Stay-at-Home Advisory, Universal Indoor Mask OrderDate Posted: December 3, 2020
Mensaje del gobernador Carney sobre el COVID-19Date Posted: December 3, 2020
Message from Governor Carney on COVID-19Date Posted: December 3, 2020
DNREC Soliciting Grant Applications for Projects to Improve Water Quality in DelawareDate Posted: December 3, 2020
Four Virtual-Programs At State Museums In December 2020Date Posted: December 3, 2020
State Auditor Kathy McGuiness Releases Review of State’s COVID-19 Data DashboardDate Posted: December 2, 2020
“Delaware Day 2020 — Expanding the Delaware Story”Date Posted: December 2, 2020
DNREC’s Electric Vehicle Rebate Program Extended Six MonthsDate Posted: December 2, 2020
Killens Pond State Park to Close to Public Saturday for Cross Country State MeetDate Posted: December 1, 2020
FY2022 Grant Applications for Arts & Community-Based Organizations and Schools Now OpenDate Posted: December 1, 2020
December 1, 2020: COVID-19 BriefingDate Posted: December 1, 2020
Plastic Carryout Bag Ban Effective on Jan. 1, 2021Date Posted: December 1, 2020
State Auditor Kathy McGuiness Unveils Delaware CARES Act Fund TrackerDate Posted: November 30, 2020
Delaware students thrive during in-person learningDate Posted: November 30, 2020
Numerous Delaware Hunting and Trapping Seasons Open in DecemberDate Posted: November 30, 2020
Governor Carney, DPH, DEMA Announce Community COVID-19 Testing SitesDate Posted: November 29, 2020
Director Schall Tests Positive for COVID-19Date Posted: November 28, 2020
Statement from Governor Carney on DEMA Director’s Positive COVID-19 TestDate Posted: November 28, 2020
Weekly COVID-19 Update – Nov. 27, 2020: New Daily Cases Remain High; Hospitalizations, Deaths Continue to IncreaseDate Posted: November 27, 2020
Delaware Families, Stakeholders Celebrate Adoption with Virtual EventDate Posted: November 25, 2020
Governor Carney Formally Extends State of EmergencyDate Posted: November 25, 2020
DNREC’s Low-Digit Surf-Fishing Tag Auction Starts Black FridayDate Posted: November 25, 2020
DPH, DEMA Provide COVID-19 Testing UpdateDate Posted: November 24, 2020
AG Jennings Announces Multistate Data Breach Settlement With The Home DepotDate Posted: November 24, 2020
Governor Carney Announces $45 Million Higher Education Relief FundDate Posted: November 24, 2020
November 24, 2020: COVID-19 BriefingDate Posted: November 23, 2020
Poinsettia Sale to Run Nov. 23-Dec. 22 at Greenhouse on DHSS’ Herman Holloway CampusDate Posted: November 23, 2020
Two Additional Youth at Stevenson House Test Positive for COVID-19Date Posted: November 23, 2020
Delaware Farmers Encouraged To Participate In Environmental Deeds QuestionnaireDate Posted: November 23, 2020
DNREC’s State Parks, Zoo Waive Entry Fees on Black FridayDate Posted: November 23, 2020
Delaware Emitira Beneficios de Emergencia para Novembre a los Hogares Elegibles de SNAP, TANF, y Asistencia GeneralDate Posted: November 23, 2020
Delaware Will Issue Emergency Benefits for November to Eligible SNAP, TANF, and General Assistance HouseholdsDate Posted: November 23, 2020
Governor Carney, DPH, DEMA Announce Community COVID-19 Testing SitesDate Posted: November 20, 2020
YRS Gives COVID Update, Temporarily Suspends VisitationDate Posted: November 20, 2020
Governor Carney Issues Third Revision to Omnibus COVID-19 Emergency Order Date Posted: November 20, 2020
Weekly COVID-19 Update: November 20, 2020: Highest Single-Day Total of New Cases Reported, Hospitalizations IncreaseDate Posted: November 20, 2020
Christina senior secretary named Delaware’s first Educational Support Professional of the YearDate Posted: November 20, 2020
State Auditor Kathy McGuiness Releases Delaware Volunteer Fire Service Special ReportDate Posted: November 19, 2020
DSHA’s Eviction Defense, COVID-19 Rental Assistance, and Homes for Grads Programs Win National AwardsDate Posted: November 19, 2020
DNREC Opens Brandywine Zoo Madagascar ExhibitDate Posted: November 19, 2020
Delaware’s First Mental Health Parity Examinations CompleteDate Posted: November 19, 2020
Regional Coalition of Northeast Governors: Colleges Will Be Encouraged to Provide Testing for StudentsDate Posted: November 18, 2020
Electronic Tax Filing Requirements for BusinessesDate Posted: November 18, 2020
Additional Direct Support Now Available to Small Businesses Applying for DE Relief GrantsDate Posted: November 18, 2020
Second Suspect Charged For Murder Of Madison SparrowDate Posted: November 17, 2020
Governor Carney Announces Additional COVID-19 RestrictionsDate Posted: November 17, 2020
November 17, 2020: COVID-19 BriefingDate Posted: November 17, 2020
Delaware Launches Free CyberStart America ChallengeDate Posted: November 17, 2020
20 District/Charter Educational Support Professionals of the Year honored, one to be named state winnerDate Posted: November 16, 2020
Delaware Finalist for International Insurance Domicile of the YearDate Posted: November 16, 2020
Delaware Division of Public Health Announces Data Breach IncidentDate Posted: November 15, 2020
Relief Fund’s Community Resiliency Fund Applications Due Nov. 15Date Posted: November 14, 2020
Governor Carney, DPH, DEMA Announce Community COVID-19 Testing SitesDate Posted: November 13, 2020
Weekly COVID-19 Update-Nov. 13, 2020: New Daily Cases Continue to Spike; Hospitalizations, Deaths Continue to IncreaseDate Posted: November 13, 2020
Unified Command For Oil Incident Along Delaware, Maryland Beaches Suspends Cleanup OperationsDate Posted: November 13, 2020
AG Jennings calls on Barr to reverse new policy that “will erode the public’s confidence in the 2020 election”Date Posted: November 13, 2020
Governor Carney, DPH Announce Testing Partnership with Nemours, Pediatric Care Providers across DelawareDate Posted: November 13, 2020
Secretary of State Bullock Sends Diwali Greetings and Well WishesDate Posted: November 13, 2020
Deadline Set For Applying To DE Relief Grant ProgramDate Posted: November 12, 2020
DNREC Issues Croda NOV for Air Quality Permit ViolationsDate Posted: November 12, 2020
Delaware Joins the ALL-IN Foster Adoption ChallengeDate Posted: November 12, 2020
Delaware Public Health Officials Confirm First Flu Case of the 2020-2021 SeasonDate Posted: November 12, 2020

Scientists from the Delaware Department of Natural Resources and Environmental Control published research today related to sediment quality behind eight dams in the Brandywine River, which finds there would be low risk of harm to fish or human health from toxic compounds if the sediments were released due to dam modification, removal or failure.
Conducted by DNREC’s Watershed Approach to Toxics Assessment and Restoration (WATAR) team, results of the study indicate that the volume of sediment trapped behind the dams is less than originally predicted, which translates to an overall lack of legacy toxic contaminant buildup. The report compares concentrations of contaminants in accumulated sediment across the eight dams investigated, and describes techniques used to evaluate potential impacts from the contaminants to aquatic life and human health. The overall findings are encouraging, as an increase in risk of adverse effects from the release of trapped sediments is not predicted.
A release of trapped sediments is likely to occur during dam modification/removal, or from catastrophic failure of any of the aged dams during a major storm/high flow event. Understanding potential impacts from the release of these sediments will allow DNREC to effectively influence proposed construction projects in the river to provide regulatory protection to downstream drinking water sources, and to fish health and aquatic habitat.
Brandywine Shad 2020 (BS2020) is a nonprofit led by the Brandywine Conservancy, the Hagley Museum and Library, and the University of Delaware. The nonprofit initiated the sediment study to inform their mission to remove or modify the dams in the Delaware portion of the Brandywine River to promote passage of American Shad and other fish species to “pre-dam” historic spawning grounds.
The Brandywine River surface water, sediment and aquatic species have been impacted by legacy contaminants such as polychlorinated biphenyls (PCBs), dioxins and furans, and chlorinated pesticides. This condition is evidenced by the existence of fish consumption advisories in both the non-tidal and tidal portions of the river. However, recent improvements have been documented, and future improvements are anticipated.
The report noted that opportunities exist to improve the overall water/sediment quality of the Brandywine River system in the future. Data collected in this study show that there are areas of greater relative concentrations of toxic compounds than others. And although increased risk of toxicity due to sediment release may not be predicted, evaluation should be conducted at the time of specific project planning/implementation to determine if a benefit to the ecosystem as a whole could be accomplished as a result of sediment removal or sediment management activities.
“The results of this evaluation provide peace of mind that the City of Wilmington’s drinking water, as well as the aquatic life in the river, should not be negatively affected by any release of contaminants associated with sediments behind the dams.” said John Cargill, hydrologist for DNREC. “Beyond this study, DNREC will continue to monitor the quality of the surface water and the fish in the Brandywine River, along with other water bodies throughout the state.
WATAR is a cooperative approach/project team that draws on the expertise of staff primarily within, but not limited to, the DNREC Division of Watershed Stewardship and the Division of Waste and Hazardous Substances. WATAR creates a framework for assessing potential toxic impacts and then implementing remediation and restoration projects in Delaware watersheds that are affected by toxic pollutants.
DNREC-WATARs partnership with BS2020 resulted in a total state cost of $51,000 for chemical analysis of sediment samples. Analytical services were supported by Hazardous Substance Cleanup Act (HSCA) funds. BS2020 funded the sediment sample collection activities. Visit the program web page at de.gov/WATAR to review/download the report and for additional supporting information.
About DNRECThe Delaware Department of Natural Resources and Environmental Control protects and manages the state’s natural resources, protects public health, provides outdoor recreational opportunities and educates Delawareans about the environment. The Division of Watershed Stewardship develops and implements innovative watershed assessment, monitoring and implementation activities. For more information, visit the website and connect with DNREC on Facebook, Twitter or LinkedIn.
Media Contacts: Nikki Lavoie, nikki.lavoie@delaware.gov; Michael Globetti, michael.globetti@delaware.gov
###
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Related Topics:  Brandywine River Dams, clean water, sediment, WATAR

Keep up to date by receiving a daily digest email, around noon, of current news release posts from state agencies on news.delaware.gov.
Here you can subscribe to future news updates.

Scientists from the Delaware Department of Natural Resources and Environmental Control published research today related to sediment quality behind eight dams in the Brandywine River, which finds there would be low risk of harm to fish or human health from toxic compounds if the sediments were released due to dam modification, removal or failure.
Conducted by DNREC’s Watershed Approach to Toxics Assessment and Restoration (WATAR) team, results of the study indicate that the volume of sediment trapped behind the dams is less than originally predicted, which translates to an overall lack of legacy toxic contaminant buildup. The report compares concentrations of contaminants in accumulated sediment across the eight dams investigated, and describes techniques used to evaluate potential impacts from the contaminants to aquatic life and human health. The overall findings are encouraging, as an increase in risk of adverse effects from the release of trapped sediments is not predicted.
A release of trapped sediments is likely to occur during dam modification/removal, or from catastrophic failure of any of the aged dams during a major storm/high flow event. Understanding potential impacts from the release of these sediments will allow DNREC to effectively influence proposed construction projects in the river to provide regulatory protection to downstream drinking water sources, and to fish health and aquatic habitat.
Brandywine Shad 2020 (BS2020) is a nonprofit led by the Brandywine Conservancy, the Hagley Museum and Library, and the University of Delaware. The nonprofit initiated the sediment study to inform their mission to remove or modify the dams in the Delaware portion of the Brandywine River to promote passage of American Shad and other fish species to “pre-dam” historic spawning grounds.
The Brandywine River surface water, sediment and aquatic species have been impacted by legacy contaminants such as polychlorinated biphenyls (PCBs), dioxins and furans, and chlorinated pesticides. This condition is evidenced by the existence of fish consumption advisories in both the non-tidal and tidal portions of the river. However, recent improvements have been documented, and future improvements are anticipated.
The report noted that opportunities exist to improve the overall water/sediment quality of the Brandywine River system in the future. Data collected in this study show that there are areas of greater relative concentrations of toxic compounds than others. And although increased risk of toxicity due to sediment release may not be predicted, evaluation should be conducted at the time of specific project planning/implementation to determine if a benefit to the ecosystem as a whole could be accomplished as a result of sediment removal or sediment management activities.
“The results of this evaluation provide peace of mind that the City of Wilmington’s drinking water, as well as the aquatic life in the river, should not be negatively affected by any release of contaminants associated with sediments behind the dams.” said John Cargill, hydrologist for DNREC. “Beyond this study, DNREC will continue to monitor the quality of the surface water and the fish in the Brandywine River, along with other water bodies throughout the state.
WATAR is a cooperative approach/project team that draws on the expertise of staff primarily within, but not limited to, the DNREC Division of Watershed Stewardship and the Division of Waste and Hazardous Substances. WATAR creates a framework for assessing potential toxic impacts and then implementing remediation and restoration projects in Delaware watersheds that are affected by toxic pollutants.
DNREC-WATARs partnership with BS2020 resulted in a total state cost of $51,000 for chemical analysis of sediment samples. Analytical services were supported by Hazardous Substance Cleanup Act (HSCA) funds. BS2020 funded the sediment sample collection activities. Visit the program web page at de.gov/WATAR to review/download the report and for additional supporting information.
About DNRECThe Delaware Department of Natural Resources and Environmental Control protects and manages the state’s natural resources, protects public health, provides outdoor recreational opportunities and educates Delawareans about the environment. The Division of Watershed Stewardship develops and implements innovative watershed assessment, monitoring and implementation activities. For more information, visit the website and connect with DNREC on Facebook, Twitter or LinkedIn.
Media Contacts: Nikki Lavoie, nikki.lavoie@delaware.gov; Michael Globetti, michael.globetti@delaware.gov
###
Print

Related Topics:  Brandywine River Dams, clean water, sediment, WATAR

Keep up to date by receiving a daily digest email, around noon, of current news release posts from state agencies on news.delaware.gov.
Here you can subscribe to future news updates.

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