HomeMy WebLinkAboutPRE_Kennydale Lakeline System Evaluation Project_171207_v1PRE-APPLICATION MEETING FOR
KENNYDALE LAKELINE SYSTEM EVALUATION PROJECT
PRE 17-000796
CITY OF RENTON
Department of Community & Economic Development
Planning Division
December 7, 2017
Contact Information:
Planner: Clark H. Close, 425-430-7289, cclose@rentonwa.gov
Public Works Plan Reviewers: Ann Fowler, 425-430-7382, afowler@rentonwa.gov
Fire Prevention Reviewer: Corey Thomas, 425-430-7024, cthomas@rentonrfa.org
Building Department Reviewer: Craig Burnell, 425-430-7290, cburnell@rentonwa.gov
Please retain this packet throughout the course of your project as a reference. Consider
giving copies of it to any engineers, architects, and contractors who work on the
project. You will need to submit a copy of this packet when you apply for land use
and/or environmental permits.
Pre-screening: When you have the project application ready for submittal, call and
schedule an appointment with the project manager to have it pre-screened before
making all of the required copies.
The pre-application meeting is informal and non-binding. The comments provided on
the proposal are based on the codes and policies in effect at the time of review. The
applicant is cautioned that the development regulations are regularly amended and the
proposal will be formally reviewed under the regulations in effect at the time of project
submittal. The information contained in this summary is subject to modification and/or
concurrence by official decision-makers (e.g., Hearing Examiner, Planning Director,
Development Services Director, Department of Community & Economic Development
Administrator, Public Works Administrator and City Council).
DEPARTMENT OF COMMUNITY
& ECONOMIC DEVELOPMENT
M E M O R A N D U M
DATE:December 7, 2017
TO:Clark Close, Senior Planner
FROM:Ann Fowler, Civil Engineer III, Plan Review
SUBJECT:Kennydale Lakeline
Sewer System Upgrades
PRE17-000796
NOTE: The applicant is cautioned that information contained in this summary is preliminary and
non-binding and may be subject to modification and/or concurrence by official City decision-
makers. Review comments may also need to be revised based on site planning and other design
changes required by City staff or made by the applicant.
I have completed a preliminary review for the above-referenced proposal. The following
comments are based on the pre-application submittal made to the City of Renton by the applicant.
SEWER
1. Separate side sewer permits will be required for each residence subject to side sewer
repairs, as applicable.
SURFACE WATER
1. The project will need a Temporary Erosion and Sediment Control (TESC) Plan and Storm
Water Pollution Prevention Plan that complies with the 2017 City of Renton Surface
Water Design Manual (RSWDM). The TESC Plan will need to include dewatering measures
and detail in-water sediment control.
GENERAL COMMENTS
1. A civil construction permit for utility repairs will be required. All utility plans shall confirm
to the Renton Drafting Standards. A licensed Civil Engineer shall prepare the civil plans.
Please visit the Development Engineering Forms page for the most up-to-date plan
submittal requirements: http://rentonwa.gov/business/default.aspx?id=42473
2. A landscaping plan shall be included with the civil plan submittal, if applicable.
K:\Preapps\2017\PRE17000796_Kennydale Lakeline System Evalution Project\PRE17000796\02.Review Comments
DEPARTMENT OF COMMUNITY
& ECONOMIC DEVELOPMENT
M E M O R A N D U M
DATE:December 7, 2017
TO:Pre-Application File No. 17-000796
FROM:Clark H. Close, Senior Planner
SUBJECT:Kennydale Lakeline System Evaluation Project – Lake Washington
General: We have completed a preliminary review of the pre-application for the above-
referenced development proposal. The following comments on development and permitting
issues are based on the pre-application submittals made to the City of Renton by the applicant
and the codes in effect on the date of review. The applicant is cautioned that information
contained in this summary may be subject to modification and/or concurrence by official decision-
makers (e.g., Hearing Examiner, Community & Economic Development Administrator, Public
Works Administrator, Planning Director, Development Services Director, and City Council). Review
comments may also need to be revised based on site planning and other design changes required
by City staff or made by the applicant. The applicant is encouraged to review all applicable
sections of the Renton Municipal Code. The Development Regulations are available for purchase
for $50.00 plus tax from the Finance Division on the first floor of City Hall or online at
www.rentonwa.gov.
Project Proposal: The City of Renton Wastewater Utility (Wastewater Utility) proposing to
excavate and evaluate the condition of the Kennydale Lakeline Sewer System at up to 10 locations
(the locations are still being finalized) in and along Lake Washington, a shoreline of statewide
significance. The work would include the installation of site isolation best management practices
(BMPs), followed by placement of shoring system, if required, and pipeline excavation using a
suction pump. Once the pipeline is exposed, the pipeline would be evaluated, sediment samples
or corrosion measurements may occur. Construction is planned to occur during the approved in-
water work window, July 15–July 31 & November 16–December 31. More specifically, one of
these actions would occur: 1) a pipeline sample or coupon would be removed for corrosion and
thickness testing and repaired with a compression fitting; 2) ultrasonic pipeline thickness testing;
or 3) a section of pipeline would be removed, and either a compression fitting would be installed
or cleanouts would be installed. Following pipeline repair, the substrate would be returned to
pre-construction conditions and BMPs would be removed.
The work plan also includes the following steps:
1. Surrounding the work area with a floating silt curtain, starting with a collapsed curtain and
expanding it so as to eliminate fish from the work area. Once expanded to size, the bottom of the
silt curtain will be anchored to the lake bed with sandbags at four feet on center. The curtain will
remain in place throughout the work and for a sufficient period after the work to allow the vast
majority of sediments to settle.
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2. Conducting turbidity monitoring adjacent to the work zone before, during, and after the work.
Results would be documented and any noted exceedances will lead to a) adjustment of work
practices, or b) stoppage of the work until suitable adjustments can be made.
3. Placing of a shoring system along the pipeline surrounding the excavation zone. The shoring
would settle down to the base of the excavation as the work progresses.
4. Suction pump sediment removal within the shoring system by use of a boat/barge-mounted
trash pump. Excavated materials would be placed outside the shoring but within the silt curtain
perimeter.
5. Diversion of upstream flows to the Pump Station #14 wet well for storage. Should the work
take long enough to fill the wet well, vactor trucks would be available to empty the wet well and
dispose of the sewage in another sewer service area.
6. Requesting reduced water usage from homes adjacent to the sewer. Flushing the pipeline with
municipal water to remove most of the sewage prior to cutting the pipe.
7. Cutting of a 4-6-inch diameter hole in the pipe.
8. Cutting through the pipe at the downstream end of the work zone and placing a plate to seal
the downstream pipe from excessive lake water intrusion. Cutting through the pipe at the
upstream end of the work zone and removing the existing pipe between the cuts.
10. Replacing the removed pipe spool with a new pipe segment that includes cleanouts to
facilitate future cleaning operations. The cleanouts would be left below the lake bed. Install repair
couplings to join and seal the replacement segment to the existing pipeline.
11. Return the sewer system to normal operations.
12. Suction pump excavated materials back into the excavation zone while removing the shoring
system. Shovel/rake/hydrojet finished surface to original grade.
13. Wait until sediments have settled from the work area before removing the silt curtain.
Current Use: The Kennydale Lakeline Sewer System was originally constructed in 1972 to provide
sanitary sewer service to approximately 55 to 60 lakefront homes along Lake Washington from
the north end of Coulon Beach Park to just south of May Creek.
Development Standards: The project would be subject to RMC 4-2-110A, “Development
Standards for Residential Zoning Designations” effective at the time of complete application
(noted as “R-8 standards” herein). These standards are available on the City’s website at
http://www.codepublishing.com/WA/Renton/#!/renton04/Renton0402/Renton0402110A.html
#4-2-110A. The project would also be subject to the City of Renton’s Shoreline Master Program
(SMP) because the subject project is located within Lake Washington. Many of the R-8
development standards would not be applicable because of the nature of the subject project. As
such, the following report only addresses the applicable development standards and/or shoreline
regulations.
Zoning: The area including this property has a Comprehensive Plan designation of Residential
Medium Density and is zoned Residential-8 (R-8) and is located in the Shoreline Single Family
Residential Overlay District.
Shoreline Regulations: The objective of the Single-Family Residential Shoreline Overlay District is
to accommodate residential development and appurtenant structures that are consistent with
this chapter. The Single-Family Residential Shoreline designation is applied to and characterized
Kennydale Lakeline System Evaluation Project
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by single-family use and zoning. According to the City of Renton Comprehensive Plan Policy SH-1,
reasonable and appropriate shoreline uses and activities should be planned for by recognizing
existing single-family residential uses and neighborhood character and ensuring that existing uses,
new uses, and alteration of facilities: a) do not result in a net loss of shoreline ecological functions;
b) avoid disturbance of unique and fragile areas; c) are provided with adequate public services
including water, sanitary sewer, and stormwater management. Existing major service utilities is a
permitted use in the Single Family Residential shoreline district.
Critical Areas: The subject project is located within and along the shoreline of Lake Washington,
a Shorelines of the State. As such, the project is required to comply with the City of Renton’s
Shoreline Master Program (SMP). The pipeline evaluation and associated work would be located
in Lake Washington Reach E. The subject project would result in potential impacts to Lake
Washington, as such a Lake Study and a mitigation plan identifying “no net loss” would be
required with the project application.
Additionally, the City of Renton COR Maps indicate the site is located in an area of moderate
landslide hazards and is located in an area of potential cultural resources. There may also be some
shoreline related wetlands along the shore, as such a wetland reconnaissance would be required
with the project application to ensure there are no wetlands and/or buffers impacted by the
project. It is the applicant’s responsibility to ascertain whether any additional critical areas or
environmental concerns are present on the site during construction.
Because the subject site is located in area of known cultural resources, based on the possible
presence of archeological discoveries within the vicinity of the subject site, a SEPA mitigation
measures would likely be applied to the subject project. If site activity reveals cultural artifacts or
other potential environmentally sensitive situation, site work shall cease and the project planner
for the City of Renton shall be contacted immediately.
Environmental Review: The proposed project is not exempt from Washington State
Environmental Policy Act (SEPA) because of the in water work proposed. Therefore, an
environmental checklist is a submittal requirement. An environmental determination will be
made by the Renton Environmental Review Committee. This determination is subject to appeal
by either the project proponent, by a citizen of the community, or another entity having standing
for an appeal.
Permit Requirements: The proposal would require a Shoreline Substantial Development Permit
Exemption and Environmental (SEPA) Review. The applications would be reviewed concurrently
in an estimated time frame of 6-8 weeks once a complete application is accepted. There is not a
fee for the Shoreline Exemption. The Environmental (SEPA) Review fee is $1,545.00 ($1,500.00
plus 3% Technology Surcharge Fee). Detailed information regarding the land use application
submittal can be found on the City’s website by clicking “City Documents” on the home screen,
then “CED Forms.” All forms are in alphabetical order. The City now requires electronic plan
submittal for all applications. The City’s Electronic File Standards can also be found on the City’s
website.
Next Steps: When the formal application materials are complete, the applicant is strongly
encouraged to have the application materials pre-screened at the 6th floor front counter prior to
submitting the complete application package. Please call Clark Close, Senior Planner at 425-430-
7289 or cclose@rentonwa.gov to schedule an appointment.
KENNYDALE LAKELINE SEWER SYSTEM PRE-APPLICATION SUMMARY
April 6, 2017 Page 5
Figure 1 Lakeline System Map 1
KENNYDALE LAKELINE SEWER SYSTEM PRE-APPLICATION SUMMARY
April 6, 2017 Page 6
Figure 2 Lakeline System Map 2
KENNYDALE LAKELINE SEWER SYSTEM PRE-APPLICATION SUMMARY
April 6, 2017 Page 7
3.0 ’TYPICAL’ PROJECT DRAWINGS
The following drawings provide examples of the types of work planned within the study area.
Figure 3 Typical Site Isolation and Work Plan
KENNYDALE LAKELINE SEWER SYSTEM PRE-APPLICATION SUMMARY
April 6, 2017 Page 8
Figure 4 Typical Lakeline System Section
KENNYDALE LAKELINE SEWER SYSTEM PRE-APPLICATION SUMMARY
April 6, 2017 Page 9
Figure 5 Typical Lakeline System Section