Your SlideShare is downloading. ×
0
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Woodglen Lake Dredging and Restoration
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Woodglen Lake Dredging and Restoration

1,744

Published on

Woodglen Lake Dredging and Restoration …

Woodglen Lake Dredging and Restoration

Department of Public Works and Environmental Services

Published in: News & Politics
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
1,744
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
16
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Woodglen Lake Dredging and RestorationDepartment of Public Works and Environmental Services
  • 2. Woodglen Lake Facts Lake Surface Area = 12.5 acres Sediment Pool Capacity = 160,000 cubic yards (CY) Current sediment in lake = 32,500 CY Estimated annual sediment load 17 feet = 1,244 CY 32,500 CY
  • 3. Watershed Drainage Area = 740 acres (1.15 square miles) Pohick Creek Watershed Sideburn Branch
  • 4. Woodglen Lake
  • 5. Woodglen Lake: Sediment Thickness
  • 6. Woodglen Lake: Water Depth
  • 7. Woodglen Lake: Dewatering Basin Inactive Dewatering Basin Available Exclusively by DigitalGlobe ©2013 Microsoft Corporation © 2012 Nokia
  • 8. Lake Restoration and Dredging Project Project Goals Restore sediment pool capacity  Downstream water quality benefits  Lake water quality  Esthetics Improve lake water quality and habitat Stabilize stream segment Provide long term maintenance improvements
  • 9. Dredging Alternatives1. Mechanically dredge deposited sediment and haul wet2. Drain lake and dry deposited sediment in place before hauling
  • 10. Lake Barton ExamplePRE-DREDGING:An estimated35,000 cubic yardsof sediment hadaccumulated inthe lake, formingislands andreducing waterlevels to less thanthree feet in mostareas.
  • 11. Lake Barton Example: Pre-Dredging
  • 12. Lake Barton Example: Dredging in ProgressDREDGING:Dredging tookplace withoutdraining the lake.
  • 13. Lake Barton Example: Dredging in Progress
  • 14. Lake Barton Example: Completed Project
  • 15. Lake Needwood Example Lake Needwood: Montgomery County, MDDredging:The lake was drained and thesediment was dried in-place.
  • 16. Lake Needwood Example: Dredging
  • 17. Dredge Alternative – In the Wet General Sequence  Establish access and staging areas  Conduct dredging utilizing barges  Haul wet sediment to disposal site for drying Benefits  Less weather dependent  Quicker initial start to dredging  Less potential for schedule extensions or delay Concerns  Increased sediment handling effort at disposal area  Potentially higher cost
  • 18. Dredge Alternative – In the Dry General Sequence  Initiate drawdown of lake  Establish access and staging areas  Establish diversion channels within lake  Conduct dredging Benefits  Higher daily sediment removal rates  Minimal sediment handling effort at disposal area  Potentially lower cost Concerns  Very weather dependent  Higher potential for delays due to weather  Typically more odor from entire lake bottom being exposed  Need to relocate/salvage fish
  • 19. Woodglen LakeDredging:32,500 Cubic Staging AreaYards
  • 20. Lake Restoration In-lake forebay Wetland planting Shoreline stabilization Fish habitat Fish stockingFish habitat created from salvaged trees Lake Barton: Fish stocking by Virginia Game and Inland Fisheries
  • 21. Chesapeake Bay Preservation Areas Buffer Restoration
  • 22. Woodglen Lake: Shoreline Restoration
  • 23. Woodglen Lake: Shoreline RestorationWoodglenLake ExistingConditions
  • 24. Shoreline Protection Options
  • 25. Fish Habitat Structures
  • 26. Stream Stabilization
  • 27. Woodglen Lake: Site Access & Staging
  • 28. Access During Construction Lake Barton
  • 29. Huntsman LakeWoodglen Lake Available Exclusively by DigitalGlobe ©2013 Microsoft Corporation © 2012 Nokia 2011
  • 30. Woodglen Lake Dredging and Restoration Project Timeline and Coordination Community coordination at Design and Construction phase June 2013: Final Design July 2013: Construction bid advertisement September/October 2013: Begin dredging Project duration: 6 - 7 months Lake may be drained for entire project (dredging method depends on project bidding)  Partial lake drawdown alternative to be evaluated
  • 31. Woodglen Lake Dredging and RestorationContacts Dipmani Kumar, Project Manager  703-324-4612  Dipmani.kumar@fairfaxcounty.gov Matt Meyers, Branch Chief  703-324-5651  Matthew.meyers@fairfaxcounty.gov Partners:

×