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For additional information regarding Water/Sewer System Extension
Review please contact the Development Services Center of the Public Works
Department, located on the 2nd floor of City Hall, 15670 NE 85th Street,
425-556-2760. Select this link for further information about
Developer Extension
Administrative Requirements for Water and Sewer (This
link will open a new window.)
Locations and size of backflow preventors must be shown on the
construction drawings. Backflow preventors are to be installed in
accordance with the latest editions of the
American Water Works Association
(AWWA) Cross Connection Control Manual and the Uniform Plumbing code (UPC).
If the backflow preventor is to be installed within a vault located on
the exterior of the building, a detailed design must be included with
the construction drawings delineating the vault layout, piping
configuration, gravity drain and appurtenances.
The booklet, Design Requirements for Water and Sewer System Extensions,
provides engineers, designers, draftsmen, inspectors and others with a
reference of the City's requirements for the design and installation of
improvements to the City's water and sewer systems. The Design
Requirements booklet is currently pending revision, however current
water/sewer design requirements can be found in Appendix 20D-4 of the
Redmond Community Development Guide.
The desirable level of service for fire flow is 1,500 gpm for
standard single-family residential areas of the City and 3,500 gpm in
other areas such as commercial, industrial and multi-family housing. A
hydraulic analysis to determine fire flow to a specific
property is available for $238.00. For private development information
contact Development Services 425-556-2760; for capital improvement
project information contact Utility Engineering at 425-556-2873. The General Sewer Plan defines the current service area, sewer
basins, and existing infrastructure, delineates the future sewer
planning area, the projected service population, and resulting sewage
flows; and then presents proposed improvements to upgrade existing
facilities and provide sewer service to the Redmond area. Specific
components of the plan include:
- Service Area and System Characteristic
- Planning Criteria
- Sewer System Evaluation
- Capital Improvement Program
- Operations and Maintenance
- Implementation
For further information, please contact Utility Engineering at
425-556-2873. The General Sewer Plan is available to purchase for
$50.00 plus tax. Grinder pump applications are restricted to single-family and
single commercial buildings that are physically unable to connect to the
sanitary sewer system by gravity. For
all applications, each grinder pump shall have its own individual force
main.
OIL/WATER SEPARATORS
Oil/water separators treat oily wastewater before the water is
discharged to the sanitary sewer. Oil water separators are required for underground parking
structures, gas stations, and for all facilities where there is
potential for discharge of oily contaminated waters. In addition, no
grease, oil, sand, liquid waste containing grease or flammable
material or other harmful ingredients in excessive amount shall be
discharged into any public sewer without installation of a
pretreatment process. The design shall follow criteria established
by the City and
King County Wastewater Treatment
Division.
GREASE INTERCEPTORS
To ensure the proper disposal of animal fats and vegetable oils, and
to prevent sewage back-ups, the City requires grease-generating
establishments to correctly install, operate and maintain properly
sized and designed grease interceptors. Grease interceptors shall be required for all commercial buildings
with kitchen and/or cafeteria facilities. The sizing of the
interceptor shall be in accordance with Appendix "H" of
the latest edition of the Uniform Plumbing Code recognized by the
City. Approval of the interceptor sizing by the Development Services
Center is required prior to installation. Inspection of the grease
interceptor shall be the responsibility of the Construction and/or
Building Divisions.
There are still many parcels within the City that are currently
serviced by septic tanks. If your site is currently serviced by a septic
system, and you need information on location, etc., contact the
King
County Health Department at 206-296-4920. If you have questions
regarding installation of sanitary sewer for replacement of your septic
system, please contact the City of Redmond Development Services Center at 425-556-2760. The purpose of the Water System Plan is to analyze the City's
water system, recommending improvements to correct existing deficiencies
and accommodate future service needs. The Plan provides a review of the
current system and its operation, an analysis of projected demand,
recommendations for system and operation improvements, as well as cost
estimates and phasing of those improvements. The
Department of Social and Health Services (DSHS) requires the Water
System Plan be updated every five years. The existing plan has been in
effect since May 1992 and an update is currently underway and expected
to be completed by early 2003. For
further information please contact the City's Utility Engineering
Division
at 425-556-2873. The Water System Plan will be available for purchase
once the update is complete. REDMOND SERVICE AREA.
Roughly, the area east of 132nd Avenue N.E., south of N.E. 124th Street,
west of 196th Avenue N.E., north of N.E. 20th Street, and specifically
excluding Marymoor Park and Lake Sammamish.
NOVELTY HILL SERVICE AREA. The Novelty Hill Service Area is that
area east of 196th Avenue N.E., south of Novelty Hill Road and east
of 212th Avenue N.E., north of Novelty Hill Road.
NOTE: General parcel information for King County properties located
in both incorporated and unincorporated areas can be obtained via the
County's website. The
Department
of Development and Environmental Services (DDES) Parcel Locator
displays this information in the form of maps, tables, and text allowing
visitors to search for a property using a parcel number, a street
address, or a street intersection.
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