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Meadowbrook Pond Updates

October 4, 2013

Pond Reopens October 5th!

There’s still quite a bit of work yet to be completed. However, as we continue to work on the final details, please follow these safety precautions:

  • Stay on designated paths
  • Keep out of fenced areas
  • Be aware of moving trucks and equipment
  • Keep an eye on children and pets in work areas

You may also see some downed trees on the ground. SPU will be reusing these trees, so please stay away from them as well.

Thank you again for your patience through the past three months, and congratulations to the dedicated SPU project team that has accomplished so much improving this flood control facility and highly valued community resource. Overall, the Pond looks great!

If you’re interested in receiving electronic updates on the Thornton Creek Confluence Project, sign up.

September 20, 2013

  • Concrete work at the diversion structure.
  • Installing new maintenance walkway at pedestrian bridge trash rack.
  • Landscaping has begun on the west side of the pond.
  • New location for seating stones on west side of the pond.

We expect the pond to reopen by Saturday, October 5th!

SNC-Lavalin has completed their in-creek work. Improvements to the diversion structure, pedestrian bridge trash rack and bank repair are also complete. Paving work and landscaping are currently underway. The Kiosk will be moved to its new location soon and restoration work on the Kiosk, coordinated by Seattle Office of Arts & Culture and the artist, will begin November.

Here are some recent photos from the work site.

August 5, 2013

  • As hoped, a family of ducks swam into the trees and started foraging within the branches just seconds after the habitat trees were placed in the pond.
  • SNC-Lavalin installing the new northern access ramp.

Pond excavation continues and new features such as habitat trees and access ramp are being installed. The creek bypass system was installed on August 2nd, and the contractor (SNC-Lavalin) has begun modifications to the existing Diversion Structure. Other in-water work to be performed over the next several weeks include construction of a new trash rack and two access ramps at the forebay. SNC-Lavalin plans to work most Saturdays in August and September in order to ensure all in-water work gets done prior to the end of the "fish window."

SPU has been consulting with the original Meadowbrook artists to reposition the seating stones that were moved due to the widened maintenance pathway.

July 3, 2013

  • Excavating for the pond expansion.
  • Removal of the of the Thornton Creek Watershed terrazzo map.
  • Clearing of vegetation for pond expansion.
  • Establishing the northern limits of the pond expansion.

Pond excavation has been going well, thanks in part to continued nice weather. See recent photos on the right.

Trucks continue to haul away the excavated soil to various fill sites in Snohomish County, and traffic will continue to be impacted along 36th Ave. N.E. and N.E. 110th over the next few weeks.

We are now in the “fish window,” that period when work is allowed in the water. That work is expected to begin July 15th. After that date, pumps will be used to bypass the creek. This year the contractor has come up with a system to reduce the noise using foam panels.

The new Northern access ramp to the pond will be installed over the next couple of weeks.

May 31, 2013

Pond to remain open an additional week – Pond to be CLOSED June 10 thru September

SPU’s contractor SNC-Lavalin has informed us that they will need another week to prepare for mobilization. Therefore, please except a Pond closing date of June 10 instead of June 3.

Also, SPU was hoping to engage the Green Seattle Partnership in coordinating another plant salvage work party like we did in January. However they did not have enough availability ahead of this summer’s construction window. Seattle Parks was able to find a home for some of the plants that would have been lost as part of the construction. For more information please contact Deb Heiden.

May 30, 2013

Addendum to the Meadowbrook Pond Dredging and Improvements Project
SEPA Determination of Non-significance issued

DNS Addendum (pdf)

May 10, 2013

Construction to Begin Again – Pond to be CLOSED June 3 thru September

Meadowbrook Pond will close June 3 when fencing goes up around the facility again. SPU's contractor, SNC-Lavalin Constructors, will mobilize on the site that week and begin work on the maintenance and safety improvements. The Pond will be closed to the public during the work until October.

Last summer the SNC-Lavalin completed the dredging portion of the project, removing approximately 6000 cubic yards of material. This summer they will be constructing the maintenance pathways, access ramps, improved trash racks, pond expansion and floating habitat islands. Refer to the summary (pdf) for location and impacts of construction items.  Additionally, the creek bank failure discovered on the west side of the facility this winter will be repaired while that portion of the creek is bypassed.

Approved working hours are Monday through Friday, 7 a.m. to 7 p.m. Some work on Saturdays may be allowed between 9 a.m. and 6 p.m. The contractor will need City approval to perform emergency or necessary work outside of these hours.

Bit of Bank Slips Away

  • Bank Slide
  • SNC-Lavalin used Triflo equipment to remove sediment from the water before cleaning it and returning it to the Pond.
  • The floating dredge has now been removed from the Pond.
  • A good view of the pond on July 24th before dredging began. Notice the family of deer working their way to the water’s edge.
  • Dredging work in Cell 1 on August 6th.
  • “Fish wrangling” on the pond.
  • During a break in the work, a local family stopped to learn more about the fish relocation and equipment.

You may have seen the yellow “Caution” tape near the creek on the west side of the Meadowbrook Pond facility. SPU crews noticed that a portion of the stream bank had sloughed off (seen on the right of this photograph). We’re not sure exactly when this occurred, however the situation now appears to be stable and creek flows are not being affected. SPU’s contractor will re-stabilize the bank this summer when they are making maintenance improvements in that area.

SPU will continue to monitor the area to ensure that the situation does not pose any serious risks. If you notice any change in the condition of the bank that seems cause for concern, please notify the SPU Operations Response Center at (206) 386-1800.

January 4, 2013

Plant Salvage

The Green Seattle Partnership will be coordinating an opportunity to salvage plants expected to be affected by this summer's construction work at Meadowbrook Pond. The salvage event is Friday, January 18 from 10 a.m. to 1 p.m.  Please visit Green City Partnerships for more details and contact information.

October 10, 2012

Meadowbrook Pond Has Reopened

There are still a few minor clean-up items the contractor needs to complete, but nothing we think presents a public safety hazard, so the access control fences were taken down. Not surprisingly, visitors started arriving right away. SPU still needs to pick up our boat and silt fences, but the dredging of the Pond is complete.

September 27, 2012

The dredging of the Pond is nearly complete and the floating dredge has been removed. Pond re-opening is anticipated to be Mid-October.

The “fish window” for the pond closed on September 30. The next few weeks will be spent restoring the disturbed areas of the site, removing stockpiled dredged material from 36th Ave NE and generally making the site safe for public entry.

SPU thanks you for your continued patience throughout this challenging process.

Master Use Permit Appeal Dismissed

The Hearing Examiner ruled on September 21 that the appeal of the project’s Master Use Permit should be dismissed. Learn more >

As you may recall this appeal was directed toward the non-dredging improvements that were to occur in the Pond and Creek (i.e., trash rack improvements, maintenance access routes/ramps and pond expansion.) Because of the delay, we have missed this year’s “fish window,” the only time work can be done in the pond and creek. This work will need to occur during the summer of 2013

August 7, 2012

The safety fences went up July 19, closing the Pond to visitors. SNC-Lavalin then mobilized and began dredging in the Forebay and Cell 1, which they expected to finish today. They’ll move into the main pond tomorrow (August 8). Trucks will continue to run on 36th Ave. N.E. but residents should notice a decrease in truck traffic on N.E. 105th St and 39th Ave. N.E. 

Fish relocation has been going well. SPU and King County staff have removed approximately 8300 fish from the Forebay, Cell 1 and Cell 2 areas. Native species were released into Thornton Creek, while non-natives and some natives are currently being kept in Cell 3. No invasive bullfrogs so far.

July 19, 2012 – Meadowbrook Pond

Dredging Underway

The safety fencing has gone up at Meadowbrook Pond. A crane, dredging boat and other large equipment will start arriving July 25, with fish relocation and dredging beginning the week of July 30. The Pond will remain closed until mid-September.

Non-native Bullfrogs

In preparation for dredging Meadowbrook Pond, we have found non-native bullfrogs, which are classified as prohibited aquatic animal species by the Washington Department of Fish and Wildlife.

While we are trapping fish in the pond, it is highly likely we will unintentionally capture bullfrogs as well, but we will not be able to release them back into another part of the pond or into the stream. They may not be “possessed, imported, purchased, sold, propagated, transported, or released,” per state regulations. Therefore, any frogs that are captured will be safely disposed of in the most humane manner possible. Removal of bullfrogs ultimately will benefit the native wildlife inhabiting the Pond. Learn more >

The Washington Department of Fish and Wildlife contacts for bullfrog and other aquatic invasive species issues are Allen Pleus at (360) 902-2724 or Sergeant Carl Klein at (360) 902-2426.

Master Use Permit Appeal

Due to additional time needed for proposed motions to the appeal, the Hearing Examiner hearing has been pushed back to October, effectively ensuring we will miss this year’s “fish window” that would allow construction of the non-dredging improvements that were to occur in the Pond and Creek. Learn more >

July 11, 2012

Dredging May Proceed

The Seattle Hearing Examiner ruled on an appeal filed on June 27 by Mr. Bruce Struthers. The ruling affirmed that SPU may proceed with dredging of Meadowbrook Pond. This means the contractor, SNC-Lavalin Constructors, can mobilize and begin the dredging work immediately. Safety fencing will start going up next week.

The Hearing Examiner’s ruling also separates Mr. Struther’s issues with “Other Improvements,” and a hearing on those has been scheduled for August 14.
Learn more >

July 9, 2012 – Pond Closes until Mid-September

Meadowbrook Pond will close July 9 when fencing will go up around the facility. SPU’s contractor, SNC-Lavalin Constructors, will be mobilizing on the site that week and begin work as soon as possible on the dredging and safety improvements project. The Pond will be closed to the public during the work, which is expected to take until mid-September.

June 12, 2012

Contractor Selected

Seattle Public Utilities has selected SNC-Lavalin Constructors, Inc. to execute the dredging and maintenance improvements to Meadowbrook Pond this summer. Construction will begin mid-July and continue through mid-September. Approved working hours are Monday through Friday, 7 a.m. to 7 p.m. Some work on Saturdays may be allowed between 8 a.m. and 6 p.m. The contractor will need to secure City approval to perform emergency or necessary work outside of these hours.


Join us on Saturday June 16, 10 a.m. to noon for a question and answer drop-in session near the 36th Ave NE street end (at NE 107th). View invitation (pdf)

May 15, 2012

Meeting Documents