International Dredging Review

International Dredging Review

In March the Maryland Department of Envi­ronment (MDE) with the Maryland Department of Transportation’s Port Administration released the draft guidance document for Innovative Reuse and Beneficial Use of Dredged Material. 

In 2001 the Maryland General Assembly enacted the Dredged Material Management Act of 2001 (DMMA) which established the Dredged Material Management Program (DMMP). MDE prepared the draft document in response to the DMMP executive committee’s recommendations issued in the Innovative and Beneficial Use Interagency Regulatory Workgroup Final Report published June 2016. The work­ing group included members of MDE the U.S. Army Corps of Engineers Baltimore District the U.S. Environmental Protection Agency Region 3 (EPA) the Maryland Department of Natural Resources (DNR) the Maryland Geological Sur­vey (MGS) the Maryland Environmental Ser­vice (MES) and the Maryland Department of Transportation’s State Highway Administration (SHA) and Port Administration (MPA). 

The new guidance document is intended to assist prospective end users in identifying and ap­plying the requirements for the various laws and regulations that govern reuse and the beneficial use of dredged material. The objectives will provide clear instruction for the permit and ap­proval processes guidance for the sampling and testing of dredged material and a framework for long-term management. 

MDE regulates proposed dredging activities and the management of dredged material at the state level and the Corps issues federal permits and permission. In October 2016 the Corps Bal­timore District issued MDSPGP-5 a program­matic general permit developed in cooperation with MDE that has regulatory authority over activities in Maryland waters. The MDSPGP-5 authorizes certain categories of maintenance dredging and minor dredging within tidal waters. It does not generally authorize open water place­ment of the material but does authorize limited placement of dredged materials for beach nour­ishment and marsh creation. 

To implement MDSPGP-5 and to streamline the state and federal permitting process within Maryland MDE and the Corps have developed a joint permitting process where the majority of applicants proposing activities that impact state and federally regulated wetlands and waters to submit a single application to MDE which is then able to review applications and in many cases issue both state and federal approvals. 

The joint permit application process includes interagency coordination and review from any other applicable state and federal agencies such as DNR Maryland Historic Trust (MHT) Na­tional Marine Fisheries Service (NMFS) Unit­ed States Fish and Wildlife Service (USFWS) United States Coast Guard (USCG). 

The MDA guidance document outlines many of the different types of projects sources of dredged material and beneficial uses. 
The largest source of material in Maryland comes from annual dredging in the federal navi­gation channels to maintain authorized depths and navigation to the Chesapeake Bay and into the Port of Baltimore. On average 5 million cu­bic yards of material is dredged annually from the navigation channels in the Chesapeake Bay and 1.5 million cubic yards is dredged from within Bal­timore Harbor. 

Material dredged from the Baltimore Harbor channels is placed in one of two MPA-owned Dredged Material Containment Facilities (DM­CFs): Cox Creek DMCF and Masonville DMCF but recent tests of the material have shown the po­tential for beneficial use. Baltimore Harbor dredged material from outside of the regularly maintained navigation channels may require other special characterization and monitoring requirements due to a possibility of legacy industrial contamination. 

Maintenance material from the Chesapeake Bay channels is beneficially used for island habitat restoration at Poplar Island Ecosystem Restoration Project. 
Acceptable beneficial uses that have an existing approval process in place include aquatic habitat creation or restoration landfill cover and structural and non-structural fill or soil (brownfield reclama­tion use as a soil amendment manufactured top­soil). Authorized beneficial uses of dredged material include: restoration of underwater grasses; restora­tion of islands; stabilization of eroding shorelines; replenishment of beach areas; creation or restora­tion of wetlands; and creation restoration or en­hancement of fish or shellfish habitats. 
Other acceptable uses may include building materials/aggregate mine and quarry reclamation or other upland uses. MDE is in the development stages of guidance for these end uses and it said ap­proval will be case by case. 

Although not currently reused the sediment from Baltimore Harbor may be used beneficially MDE said in accordance with the recommenda­tions in its guidance document. 
The document also outlines other innovative reuse opportunities for dredged sediment includ­ing landfill closure caps; soil and fill materials in the reclamation of brownfields engineered fill for roadway bed material manufactured soil or soil amendment/conditioner; parking lot foundations or embankments. 

“Finding innovative ways to manage sediment removed from the shipping channels serving the Port of Baltimore is a priority for the MPA. With the development of MDE’s Draft Guidance Docu­ment and Technical Screening Criteria there is now a clear path forward for making innovative reuse a reality not just for the MPA but for the private sector and related industries throughout Maryland” said MPA Director of Harbor Devel­opment Chris Correale. “The MPA is grateful for MDE’s leadership on this effort – we share the same goal that dredged material as a valuable natural resource can safely be reused while driving inno­vation benefiting the environment and growing Maryland’s economy.” 
A public meeting to present the draft guid­ance and answer questions was held April 25. Public comments on the document were accepted through May 26. MDE will consider those before releasing the final guidance.