Water Quality Improvements at Miracle Drive

As part of Montgomery County’s responsibility to reduce pollutants in our local streams and rivers, the County’s Department of Environmental Protection will stabilize eroding stream and outfall channels in the Goshen Estates Community in Gaithersburg. Restoring and stabilizing the impaired stream and outfall channels will improve stream function to significantly reduce sediment and associated nutrient loading within Upper Great Seneca Creek, Goshen Branch, Seneca Creek, and the Potomac River.

PROJECT DETAILS

Outfall Stabilization at Miracle Drive

Typical outfall, immediate post-construction.

Typical outfall at full maturity, in Spring/Summer.

Typical outfall at full maturity, in the Fall/Winter.

Outfall stabilization at Miracle Drive will help restore deeply incised outfall channels to enhance channel stability, improve biological conditions and significantly reduce sediment and nutrient loading downstream.

  • The outfall channels are heavily eroded and unstable.
  • Uncontrolled runoff from upstream results in channel bed and bank erosion that contributes significant volumes of sediment and nutrients downstream.
  • Channel erosion is contributing to property loss, tree impacts, and poor instream aquatic habitat.
  • Outfall stabilization at Miracle Drive will help restore deeply incised outfall channels to enhance channel stability, improve biological conditions and significantly reduce sediment and nutrient loading downstream.
  • Project design will stabilize bank grading and storm drain infrastructure at two outfall locations near Miracle Drive.
  • Native vegetation, including grasses, trees and shrubs will be planted within the riparian buffer to reduce soil compaction, stabilize erodible soils, and filter storm flows. The riparian buffer will be permanently protected by an easement.

  • Construction is currently scheduled to begin in Winter 2025 and will last approximately five months. Most excavation and truck traffic will occur within a 4–6-week window in the middle of construction.
  • Community members will have the opportunity to review plans before construction at various points in the planning process and will be invited to walk the site with the GreenVest team before and after construction.
  • Construction access, staging and stockpiling will occur along an existing County storm drain easement located betweentwo private properties at the end of Plum Creek Court.
  • A temporary construction access point will cross the valley floor from Plum Creek Court to the project location and belocated to avoid impacts to trees and natural resources.

  • Parking for data collection will occur on Plum Creek Court.

  • Parking for construction access will occur on Plum Creek Court and in the project staging
  • Limited tree removal will occur to facilitate access and construction or in cases where a tree is dying or at risk of falling. Material from trees will be used on site for in-stream structures and for wildlife habitat. Trees that are removed will be replanted. The intent of the design is to minimize tree loss to the maximum extent practicable.

  • The project must pass through rigorous review processes established by County, State and Federal agencies developed to maximize safety, minimize environmental impacts and ensure modern design standards are met.

Outfall Stabilization is the practice of implementing a stable channel that extends from an upland stormwater source to a receiving stream channel. It provides a permanently stable stormwater conveyance through engineering practices such as grading, step-pools, cascades and/or rock stream bank protection.

PROJECT DETAILS

Stream Restoration at Plum Creek Drive

Restoring the impaired stream channels will reduce further erosion such that less sediment with associated nutrients are transported from the restored reaches into downstream receiving waters. These improvements, which will be designed to mimic natural features, will support a more resilient and healthy in-stream and riparian ecosystem.

  • The stream reach is actively eroding.
  • Channel erosion is contributing to, property loss, tree impacts and poor instream aquatic conditions.
  • The riparian buffer is poor, with grass mowed directly up to the stream banks in many locations.
  • Restoring the impaired stream channels will improve stream function and reduce sediment and nutrient loading downstream.
  • Project design will establish stable stream bank grading, raise the stream channel bottom and shift the configuration of the channel to include riffle, cascade, and pool structures.
  • Native vegetation, including grasses, trees and shrubs will be planted within the riparian buffer to promote habitat diversity and provide additional natural grade control. The riparian buffer will be permanently protected by an easement.
  • Construction is currently scheduled to begin in Winter 2025 and will last approximately five months. Most excavation and truck traffic will occur within a 4–6-week window in the middle of construction.
  • Community members will have the opportunity to review plans before construction at various points in the planning process and will be invited to walk the site with the GreenVest team before and after construction.
  • Construction access, staging and stockpiling will occur on private property adjacent to the stream reach.
  • Parking for Plum Creek Drive data collection and construction access will occur along Plum Creek Drive, adjacent to the stream reach.
  • Limited tree removal will occur to facilitate access and construction or in cases where a tree is dying or at risk of falling. Material from trees will be used on site for in-stream structures and for wildlife habitat. Trees that are removed will be replanted. The intent of the design is to minimize tree loss to the maximum extent practicable.
  • The project must pass through rigorous review processes established by County, State and Federal agencies developed to maximize safety, minimize environmental impacts and ensure modern design standards are met.

Stream Restoration is a set of techniques used to protect property and infrastructure by reducing stream bank erosion, minimizing the down- cutting of stream beds and restoring natural stream ecosystems.

Typical channel at full maturity, in the Spring/Summer.

Typical channel, immediate post-construction.

Typical channel at full maturity, in the Fall/Winter.

PROJECT UPDATES

News & Updates

Check back regularly for up-to-date project news and information, including construction alerts and opportunities to meet with the project team.

12/12/23 Community Meeting Recap
GreenVest hosted a second, virtual public meeting on December 12th to provide residents with updates on stormwater management work in the Goshen Estates community,
November 2023 Community Update
PROJECT UPDATES Upcoming Virtual Community Meeting Join the Greenvest team on Tuesday, December 12, at 7 p.m. for a virtual meeting with Goshen Estates
Virtual Community Meeting w/GreenVest, 12/12 @7pm
Join us for an opportunity to learn more about water quality and stormwater management improvements in the Goshen Estates Community. Community Meeting Details Date:  

PROJECT RESOURCES

Learn More

Frequently Asked Questions

Montgomery County holds a Municipal Separate Storm Sewer System Permit (“MS4 Permit”) issued by the Maryland Department of the Environment under authority delegated from the U.S. Environmental Protection Agency which imposes several water quality improvement requirements and goals on the County. This project will support the County’s efforts to achieve water quality requirements by stabilizing eroding streams and outfall channels.

  • The outfall channels and streams to the East of Miracle Drive and to the south of Miracle Drive are actively eroding, deeply incised, and contribute significant volumes of sediment downstream.
  • Erosion is contributing to property loss, destabilizing trees by exposing their root structures, and contributing to poor instream aquatic function.
  • Restoring these impaired stream channels will reduce further erosion to reduce sediment and associated nutrients delivered to downstream receiving waters including Upper Great Seneca Creek, Goshen Branch, Seneca Creek and the Potomac River.
  • Restoration will support more resilient and healther in-stream and riparian ecosystems.
  • Construction is currently scheduled to begin in Winter 2025 and will last approximately five to six months. Most excavation and truck traffic will occur within a 4-6-week window in the middle of construction.

For work at Miracle Drive:

  • Construction access, staging and stockpiling will occur along an existing County storm drain easement located between two private properties at the end of Plum Creek Court.
  • A temporary construction access point will cross the valley floor from Plum Creek Court to the project location and be located to avoid impacts to trees and natural resources.

For work at Plum Creek Drive:

  • Construction access, staging and stockpiling will occur on private property adjacent to the stream reach.
  • Parking for data collection and construction access will occur along Plum Creek Drive, adjacent to the stream reach.
  • All project work will follow strict soil erosion and sediment control requirements set by both the State and the County to minimize dust during construction.

  • Techniques such as wetting throughout the day, street sweeping, dust screens, and stabilized construction entrances will be utilized to minimize dust and dirt during construction.

  • There will be some noise disruption during construction. In addition to compliance with standards set forth in the Montgomery County DEP’s Noise Control Law, GreenVest will use noise mitigation techniques to minimize impacts to adjacent property owners. Night work is not anticipated.

GreenVest provides a 1-year guarantee on the completed project which includes providing required maintenance. After this time and into the future, Montgomery County will be responsible for the execution and cost of post-construction stream maintenance, if needed.

  • Stream restoration and outfall stabilization is designed to be maintenance free.
    • The County will monitor and maintain if needed the streams for a period of five years. This includes ensuring that riparian and floodplain plants are successful and established.
    • After five years, the County will only perform limited maintenance to address concerns that may impact the function of the project.

For a full list of FAQs, click here.

PROJECT CONTACTS

Contact the Project Team

Residents can sign up to receive email updates and/or text alerts and ask questions of the project team through the contact information below and the form on the right.

Call or Text :

240-690-5848

Email :

info@GreenMiracleDrive.com

Translation Services :

If you would like project information in another language or format, or if you require the services of an interpreter, please contact Hilary@GreenMiracleDrive.com.