Seattle.gov Home Page
Seattle.gov This Department

Seward Park Lake Washington

Water quality along Lake Washington Blvd. in southeast Seattle will be improved by the Genesee Basins project.

Genesee Basins

The Genesee Basins projects combine additional storage and transmission pipeline to control about 600,000 gallons, reducing overflows into Lake Washington. When finished in 2015, the Genesee projects will bring three combined sewer basins into control.

Because of topography and other factors, Green Stormwater Infrastructure (GSI) opportunities are limited in the Genesee Basins. Opportunities may exist for small-scale projects; these are being evaluated.

Project Updates

Sign up for project updates

November 15, 2013

Construction Activities:

This Saturday, 11/16, the contractor will be working at both Sites 9A and 11A. This contractor chose to work this Saturday because of impacts that they have encountered during the week causing the work to fall behind. Activities will include excavation for the various structures, and setting forms and installing rebar in preparation for concrete placement. The hours of work this Saturday will be from 9:00 a.m. to 6:00 p.m.

  • Site 9A 11/15/2013
  • Site 9A 11/15/2013
At Site 9A (Lake Washington Blvd. S. at 53rd Ave. S.)

Dewatering Activity
Dewatering activities at Site 9A are continuing. The dewatering system requires daily maintenance and residents can expect some activity during the weekend. Activity will include checking the turbidity and pH levels in the settlement tanks and also removing the water from the tank if necessary.

The vactor truck used to remove the water from the settlement tanks creates considerable noise, but the contractor will not begin the loud activity until after 9:00 a.m. The contractor hopes to empty the tank once in the morning and then again around 5:00 p.m. The frequency may increase or decrease depending on whether the water can be discharged into Lake Washington.

Storage Tank Construction at 9A

Excavation of soil for the 120,000-gallon storage tank structure is in progress. Anticipated completion of this activity is 11/22/13. After the excavation is completed, the final shoring braces will be installed, then the contractor will begin setting forms, placing rebar, and pouring concrete.

Facility Vault Construction at 9A
The construction of the Facility Vault is currently in progress. Work includes setting forms, installing rebar and conduits, and placing concrete. Anticipated completion of the structure is mid-December.

  • Site 11A 11/15/2013
  • Site 11A 11/15/2013
At Site 11A (Lake Washington Blvd. S. at 49th Ave. S.)

Dewatering Activity
Dewatering activities at Site 11A are continuing. The work associated with the dewatering activities at 11A is the same as 9A.

Storage Tank and Facility Vault Construction at 11A
Excavation to construct both the 380,000-gallon storage tank and the facility vault has been completed. The contractor is now setting forms, placing rebar, and pouring concrete for the two structures. This activity will continue for the remainder of the year and into 2015.

Construction Impacts:
Hoffman Construction Company and its sub-contractors will continue to work from 7:00 a.m. to 6:00 p.m., Monday through Friday. Some work will be necessary on Saturdays and is allowed between 9:00 a.m. and 6:00 p.m.

Although there will be workers arriving on the site before 7:00 a.m., they have been cautioned to shut off vehicle engines and not start any construction equipment before 7:00. They are also to keep their voices down and avoid disturbing neighbors with any loud noises during this time. In addition, workers have been told to park their vehicles on the street and not take up parking spaces in the marina parking lot.

During the rest of the construction period, the neighborhood can expect to have the usual construction impacts of noise, dust and truck traffic. Truck traffic will increase during major excavation activities. Heavy dump trucks are restricted to haul routes approved by SDOT.

We will continue to provide updates to the community via our ListServ and website.

For specific questions during construction, contact Michael Panlasigui, SPU’s Resident Engineer on site, at (206) 423-2598 or by email at Michael.Panlasigui@seattle.gov.

  • November 1st photos.
  • November 1st photos.
  • November 1st photos.
  • November 1st photos.

November 2, 2013

Construction Activities:

This Saturday, 11/2, the contractor will be working at both Sites 9A and 11A. This contractor chose to work this Saturday because of impacts that they have encountered during the week causing the work to fall behind. Activities will include welding for bracing installation, excavation for the various structures, and setting forms and installing rebar in preparation for concrete placement

The hours of work this Saturday will be from 9:00 a.m. to 6:00 p.m.

At Site 9A (Lake Washington Blvd. S. at 53rd Ave. S.)

Dewatering Activity
Dewatering activities at Site 9A are continuing. Seattle City Light has provided power to Site 9A; therefore, the temporary generator used to power the dewatering system is no longer in use. The noise associated with the generator should be gone.

The dewatering system still requires daily maintenance and residents can expect some activity during the weekend. Activity will include checking the turbidity and pH levels in the settlement tanks and also removing the water from the tank if necessary.

The vactor truck used to remove the water from the settlement tanks creates considerable noise, but the contractor will not begin the loud activity until after 9:00 a.m. The contractor hopes to empty the tank once in the morning and then again around 5:00 p.m. The frequency may increase or decrease depending on whether the water can be discharged into Lake Washington.

Excavation and Bracing Activities
The excavation and bracing has been completed for the Facility Vault. The construction of the structure is in progress.

Excavation of soil and installation of shoring braces has begun for the 120,000-gallon storage tank structure. Anticipated completion of this activity is 11/22. After the excavation is completed and bracing is installed, the contractor will begin building the Tank Structure.

Facility Vault and Storage Tank Construction
The construction of the Facility Vault is currently in progress. Work includes setting forms, installing rebar and conduits, and placing concrete. Anticipated completion of the structure is mid-December.

After the installation of Storage Tank shoring bracing, the contractor will begin the construction of the actual tank.

At Site 11A (Lake Washington Blvd. S. at 49th Ave. S.)

Excavation to construct both the 380,000-gallon storage tank and the facility vault is currently in progress.

The Contractor is installing the necessary bracing for the shoring concurrently with the excavation activities.

The dewatering activity is also currently ongoing. Similar to 9A, the dewatering system at 11A requires daily maintenance and residents can expect some activity during the weekend. The contractor needs to pump out the ground water in preparation for the excavation activity. The ground water is pumped out of the ground and into a settlement tank. The weekend activity will include emptying the sediment tanks on site using a vactor truck. The vactor truck creates considerable noise, but the contractor will not begin the loud activity until after 9:00 a.m. The contractor hopes to empty the tank once in the morning and then again around 5:00 p.m.

Construction Impacts:

Hoffman Construction Company and its sub-contractors will continue to work from 7:00 a.m. to 6:00 p.m., Monday through Friday. Some work will be necessary on Saturdays and is allowed between 9:00 a.m. and 6:00 p.m.

In addition, the contractor has received approval to work on Monday November 11th, Veteran’s Day. Work hours on that day will be 9:00 a.m. to 6:00 p.m. Work is necessary on the holiday to maintain the schedule for concrete pours.

Although there will be workers arriving on the site before 7:00 a.m., they have been cautioned to shut off vehicle engines and not start any construction equipment before 7:00. They are also to keep their voices down and avoid disturbing neighbors with any loud noises during this time. In addition, workers have been told to park their vehicles on the street and not take up parking spaces in the marina parking lot.

During the rest of the construction period, the neighborhood can expect to have the usual construction impacts of noise, dust and truck traffic. Truck traffic will increase during major excavation activities. Heavy dump trucks are restricted to haul routes approved by SDOT.

We will continue to provide updates to the community via our ListServ and website.

For specific questions during construction, contact Michael Panlasigui, SPU’s Resident Engineer on site, at (206) 423-2598 or email Michael.Panlasigui@seattle.gov.

  • Secant pile installation – June 2013

September 20, 2013

Construction Activities:

At Site 9A (Lake Washington Blvd. S. at 53rd Ave. S.) – The Contractor has finished installing the secant pile shoring system for the facility vault. Over the next couple of weeks they will finalize the dewatering system. Excavation of soil and installation of shoring braces for the facility vault is planned to begin October 7th and should last about two weeks. Then, they will begin building the facility vault, while concurrently starting excavation and shoring bracing for the 120,000-gallon storage tank. Excavation and bracing for the tank should be complete in the third week in November. Residents can anticipate increased truck traffic during excavation activities.

At Site 11A (Lake Washington Blvd. S. at 49th Ave. S.) – The Contractor has finished installing the sheet pile for the temporary shoring system. At this site, one large area will be excavated in order to construct both the 380,000-gallon storage tank and the facility vault. The Contractor has removed the top few feet of soil down to the elevation of the upper shoring braces. Over the next couple of weeks they will finalize the dewatering system. Then, in early October, the upper shoring braces will be installed. Excavation will resume the second week in October. Bracing installation and excavation will continue through mid-November. Residents can anticipate increased truck traffic during excavation activities.

On 53rd Ave. S. between Lake Washington Blvd. S. and S. Alaska St. – The contractor has finished installing electrical conduit by directional drilling in the Right-of-Way. Workers will be installing hand holes and other connections anticipating a completion date of September 27th. Residents can anticipate traffic control with flaggers and signage directing traffic for public safety. Any sidewalk areas damaged by the activity will be restored temporarily until the electrical work is complete.

On S. Alaska St. in between 53rd Ave. S. and 54th Ave. S. - The contractor has completed the installation of electrical conduit by directional drilling.
Workers will be installing hand holes and meter cabinets along the Right-of-Way.
Anticipated completion of this work will be by 9/27.
Residents can anticipate traffic control services with flaggers directing traffic for public safety. Again, any sidewalk damaged by the activity will be restored temporarily until the electrical work is complete.

At the intersection of Lake Washington Blvd. S. and 53rd Ave. S. – The week of September 23rd, the Contractor will be installing an electrical duct bank across Lake Washington Blvd. S. Residents can anticipate traffic control with flaggers and associated signage. Intermittent short delays in the right of way may take place while work is taking place.

Construction Impacts:

Hoffman Construction Company and its sub-contractors will continue to work from 7:00 a.m. to 6:00 p.m., Monday through Friday. Some work may occasionally be necessary on Saturdays and is allowed between 9:00 a.m. and 6:00 p.m.

Although there will be workers arriving on the site before 7:00 a.m., they have been cautioned to shut off vehicle engines and not start any construction equipment before 7:00. They are also to keep their voices down and avoid disturbing neighbors with any loud noises during this time. In addition, workers have been told to park their vehicles on the street and not take up parking spaces in the marina parking lot.

During the rest of the construction period, the neighborhood can expect to have the usual construction impacts of noise, dust, and truck traffic. Truck traffic will increase during major excavation activities. Heavy dump trucks are restricted to haul routes approved by SDOT.

We will continue to provide updates to the community via our ListServ and website.

July 17, 2013 – End of First Phase

Installation of piles for the shoring at the storage tanks for both sites has mostly been completed. Dewatering wells were also installed at both locations to be used during the future excavation and construction of the underground facilities.

The Contractor, Hoffman Construction, is in the process of demobilizing from both sites. By July 19th, all equipment will be removed, the parking lots will be repaved, and the fences will be taken down so that the parking lots may be used for Seafair.

Returning after Seafair

On August 12th, the Contractor will begin to remobilize. The fences will go back up, equipment will be brought back in, and work will resume. During August and September, soil will be removed from the area within the shoring system to provide a large hole for construction of the underground storage tank at each site.

Tank Construction Begins

In the fall, construction of the tanks and vaults will begin with the tying together of reinforcing steel, form work, and then the pouring of concrete. Construction of these facilities will take place all winter followed by installation of utilities and street restoration next spring and summer.

Good Neighbors

When the work continues, Hoffman Construction Company and its sub-contractors will work from 7:00 a.m. to 6:00 p.m., Monday through Friday. Some work may occasionally be necessary on Saturdays and is allowed between 9:00 a.m. and 6:00 p.m. Although there will be workers arriving on the site before 7:00 a.m., they have been cautioned to shut off vehicle engines and not start any construction equipment before 7:00. They are also to keep their voices down and avoid disturbing neighbors with any loud noises during this time. In addition, workers have been told to park their vehicles on the street and not take up parking spaces in the marina parking lot.

During the rest of the construction period, the neighborhood can expect to have the usual construction impacts of noise, dust, and truck traffic. We will continue to provide updates to the community via our ListServ and website.

June 6, 2013 – Construction Update

Construction continues at the two project sites: the parking lots located at 4608 and 3939 Lake Washington Blvd, (aka CSO 9A and CSO 11A, respectively).

Both sites are fully fenced, and a temporary path is in use at the CSO 9A site (aka the parking lot at Duck Bay).

Construction activities for the next several weeks include:

  • Drilling of dewatering wells at both sites. The contractor started at CSO 9A last week, and will begin at the 11A site toward the end of next week.
  • Shoring installation has begun. The contractor is installing the secant piles, which entail auguring a series of shafts into the ground, inserting a steel piling, then filling the augured hole with a concrete mix. Secant pile installation should be complete in the first half of July. The sheet pile shoring, at CSO 9A and CSO 11A, is scheduled to begin Monday, June 10, and should be completed in early July.
  • By July 19, the contractor will have demobilized from both sites, and the lots will be reopened for Seafair festivities.
  • After Seafair, the contractor will remobilize at both sites, and will complete their dewatering systems, and begin excavation.

The contractor and SPU will continue to make every effort to minimize impacts to the community.

Near-by residents may notice some noise and truck traffic along Lake Washington Blvd.

During the shoring installation, some minor vibration may be felt adjacent to the sites.

SPU will be performing vibration monitoring during the installation of the sheet piles at CSO 9A and CSO 11A in June, to ensure the vibrations remain within allowable levels.

Our permit allows the contractor to work the hours allowed by the noise ordinance (SMC 25.08) which are 7 a.m. to 10 p.m., Monday through Friday, and on Saturdays from 9 a.m. to 6 p.m. While the contractor is permitted to work during those hours, their plan is to keep their work hours to 7 a.m. to 6 p.m. Monday through Friday. Crews may be working on some Saturdays to take advantage of good weather and complete necessary work before the July 19 suspension for Seafair.

Seward Park Lake Washington

The well drilling machine.

May 24, 2013 – Construction Underway!

The construction phase of the Genesee CSO Reduction project has commenced at the two project sites, the parking lots located at 4608 and 3939 Lake Washington Blvd. (also referred to as CSO 9A and CSO 11A, respectively). Both sites are fully fenced, and a temporary path is in use at the CSO 9A site (the parking lot at Duck Bay).

Construction activities to occur over the next several weeks include the following:

  • Drilling of dewatering wells at both sites. The contractor started at CSO 9A this week, and will begin at the 11A site toward the end of next week.
  • Re-routing some existing storm drain pipes around the locations of the tank and vault excavations.
  • Shoring installation is scheduled to begin on May 30th. The contractor will begin installing the secant piles by drilling a series of shafts into the ground, inserting a steel piling in each, then filling the augured holes with a concrete mix. Secant pile installation should be complete in the first half of July. The sheet pile shoring, at CSO 9A only, is scheduled to begin in early June and should be completed that month.
  • By July 19th, the contractor will have demobilized from both sites, and the parking lots will be re-opened for Seafair festivities.
  • After Seafair, the contractor will remobilize at both sites and complete their dewatering systems. Then they’ll begin excavation.

The contractor and SPU will continue to make every effort to minimize negative impacts to the community. Nearby residents may notice some noise and truck traffic along Lake Washington Blvd. S. During the shoring installation, some minor vibration may be felt adjacent to the sites. SPU will be monitoring vibration during the installation of the sheet piles at CSO 9A in June, to ensure the vibrations remain within allowable levels.

Our permit allows the contractor to work between 7 a.m. and 6 p.m., Monday through Friday; however, they hope to minimize the number of days they need to work past 4 p.m. Work will only be allowed on weekends or holidays under special circumstances and with prior approval by DPD.

May 15, 2013 – Public Meeting

A drop-in meeting will be held on May 15th, from 6 – 7 p.m., in the parking lot along Lake Washington Blvd. S., between 48th & 49th Ave. S. This will be an opportunity to review and comment on the proposed landscaping plan for restoring the area to its normal use after construction of a 380,000 gallon underground storage tank. It will be a chance to meet and ask questions of the contractors who will be doing the work, as well as key members of the SPU project team.

March 22, 2013 - Construction is about to begin!

Here’s an approximate schedule for the coming months.

On about April 1st, surveyors will be at both Genesee project sites to mark specific locations prior to the start of construction.

On April 11th, Hoffman Construction, the contractor awarded SPU’s work on this project, will begin to mobilize their equipment and personnel. Temporary fencing will be erected and the lake side trail will be relocated where Lake Washington Blvd. S. meets 53rd Ave. S.

May 1st is the target date to begin installing shoring – the safety structures required when excavating deep holes. That work must be completed by July 19th, and the area will be cleaned up and the temporary fencing removed. In effect, the project will stop for Seafair.

On August 12th, Hoffman expects to return to the site, put the temporary fencing back up and begin excavation. Construction of the concrete tanks is scheduled to begin September 3rd.

SPU analyzed multiple alternatives to reduce Combined Sewer Overflows (CSOs) in three Genesee basins in order to meet the regulatory requirement. The preferred alternatives identified in the SEPA environmental checklist and the Engineering Report to the Washington State Department of Ecology are:

  • Underground storage in the parking lot along Lake Washington Blvd. between 48th Avenue South and 49th Avenue south (49th Avenue South Parking Lot
  • Underground storage in the parking lot along Lake Washington Blvd. south of Lakewood Moorage and at the end of 53rd Avenue South (53rd Avenue South Parking Lot)

SPU will be presenting these preferred alternatives to the City Council for approval in summer or fall 2011. SPU will also continue developing information for design of these projects. Due to the nature of this work, you may notice SPU and contractors conducting field work around the area. The latest project notices will be provided here.

Public Hearing

The City Council’s Parks and Neighborhoods Committee will hold a public hearing on proposals that authorize SPU to construct the underground storage tanks on the two Genesee tank sites. The hearing will be held on Thursday, February 7, 2013 at City Council Chambers, Seattle City Hall, 600 Fourth Avenue, 2nd Floor. It is scheduled to begin at 9:30 a.m. Learn more > (pdf)

Meetings

If you live, work or visit the Genesee area, we’re looking forward to getting your input.

All documents are in PDF format.

  • February 20, 2013, Community Meeting - presentation
  • February 7, 2011, Friends of Seattle's Olmsted Parks Briefing
  • January 27, 2011, Seattle Parks Board Meeting -presentation
  • January 20, 2011, 6-8 p.m. Public Meeting at Lakewood/Seward Park Community Club - notice, meeting notes, presentation
  • November 9, 2010 Public Meeting at Lakewood Seward Park Community Club - notice, presentation, meeting summary
  • November 1, 2010 Friends of Seattle's Olmsted Parks Briefing
  • October 12, 2010 Neighborhood Meeting at Lakewood Seward Park Community Club - notice
  • September 21, 2010 Public Meeting at Rainier Valley Cultural Center - notice, presentation
  • September 14, 2010 Lakewood/Seward Park Community Association Briefing - notice, presentation
  • August 26, 2010 Genesee Park Neighbors Association Briefing - notice, presentation
  • August 21, 2010 Genesee Poster Session - notice, presentation
  • June 23, 2010 Southeast District Council Meeting - presentation

Project Schedule

The State Department of Ecology has set the following schedule for Genesee CSO Reduction Projects:

Genesee CSO Basin 43 Project

  • Complete and submit draft Engineering Report - December 31, 2010
  • Complete and submit for approval a Final Engineering Report - May 31, 2011
  • Complete and submit draft plans and specifications - January 31, 2013
  • Complete and submit for review and approval final plans and specifications - June 30, 2013
  • Begin construction - April 24, 2013
  • Complete construction - September 29, 2014

Genesee CSO Basins 40 and 41 Project

  • Complete and submit draft Engineering Report - December 31, 2010
  • Complete and submit for approval a Final Engineering Report - May 31, 2012
  • Complete and submit draft plans and specifications - January 31, 2014
  • Complete and submit for review and approval final plans and specifications - June 30, 2014
  • Begin construction - April 24, 2013
  • Complete construction - September 29, 2014

Final Reports

All documents are in PDF format.

Questions?

Contact the Genesee Basins project team.

Or contact Resident Engineer Michael Panlasigui at (206) 423-2598 or michael.panlasigui@seattle.gov.