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PATRICK HARRON &
ASSOCIATES, LLCV
Patrick Harron &
Associates, LLC
Engineering
Planning
14900 1n[arurban A- S.
Suite Number 279
Seattle, WA 96166
T 206.674.4659
F 206.674.4660
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DAB 01.24.07
ALE 1" = 20'
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MATCHLINE SEE BELOW FOSTER SHORT FLAT
"S OF SECTION 19, TOWNSHIP 23, RANGE 05, W.M.
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- - -- ^ 99.58'
f--- S87'5_3 -9 E9 -_- o - -
/ EXISTING 3/4 WATER SERA
(UNDER SEPERATE PERMIT)
o zo coo / _- <_ FF 202.93
Ili ®o - IE;'5S 185.89 •/ LOT 1 0 ,,
HORIZONTAL SCALE
6" PVC SIDE SEWER
Y NTON
FIRE HYDRANT MARKER /, STD PLAN 8078
(SEE DETAIL) MIN SLOPE 27
A4ROX 6' -EX STING SIDE SEWER
LOCATION NeB•32'33 "w �� ` �
/ / ✓'� 123.61'
EXISTING 8" DI WATER - NOTE:
!
/ PLACE'HYDRANT VALVE
FF 202.9? � H-i
/ �T BASE`cOF NEW HYmRANIT �
STA 1 +64.55 14.7' RT ✓`•`��
q, `- HYDRANT ASS'Y _
3 LF 8" DIP LOT 2
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E S 186.19 WATER SERVICE
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/� INST
(UNDER SEPERATE PERMI) I
IE 5S 186.26±/'
6" CLEANOUT.
OF'RENTON NBB'32'21 "W
STD PLAN t47.6a'
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20 � PER CITY OF RENTON LOT 3
`C STD PLAN /8078
MIN SLOPE 2%
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PER CITY OF RENTON - I
STD PLAN B076 < '
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j PROJECT W1997
12" HP GAS / 3/4" WATER SERVICE 171.67'
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INSTALLED -B-Y i'- N87'58'43 "W
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EXISTING 24' DI WATER�:r /k� -
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SECTION a PAVEMENT REMOVAL in lieu of grinding
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Amended April 4, 2005 by Orrin -5131 g
grinding out the specified
two inches (2 ") of asphalt. Full pavement replacement to meet or exceed the axis" pavement
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SECTION 2 definitions
Engineer: The term engineer shall denote the City project manager, inspector and /or plan reviewer, or 2
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fi' MIN.
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NOTE:
UNLESS OTHERWISE SNOW ON PLAN, SIDE SEWER SHALL HAVE
UM 25' COVER AT PRWERTY LINE OR 3 -5' LONEa
THAN THE LOWEST HOUSE EL -TION. NHICHEVER IS LONER.
_MARO sins seRmt uTSrALUmoN
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DWG. NAME DO'. aP PAGE a07d
TBM "A"
EL 201.65
N 171738.02
E 1300078.27
STA 3 +34.36 (126.16'RT)
CITY OF RENTON S
SECTION a PAVEMENT REMOVAL in lieu of grinding
TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS T
The contactor in all cases can remove the pavemeal in the replacement area instead of
Amended April 4, 2005 by Orrin -5131 g
grinding out the specified
two inches (2 ") of asphalt. Full pavement replacement to meet or exceed the axis" pavement
SECTION 1 purpose d
Section 9 Trench backfill and restoration Construction Requirements
or others permitted to work In the public right -of -way will adhere to the procedures set forth in this policy. 1
1. Trench restoration shall be either by a patch or overlay method, n required and i
SECTION 2 definitions
Engineer: The term engineer shall denote the City project manager, inspector and /or plan reviewer, or 2
2. All trench and pavement cuts, which will not be overlaid, shall be made by sawoul or grinding.
SECTION 3 HOURS OF OPERATIONS 3
3. All trenching within the top four feet (4') shall be backfilled with crushed surfacing materials
Hours for walk within the roadway for asphalt overlays or trench munition shall be as directed by the c
conforming to Section 4-04 of the Standard Specfcations. Any trenching over four feet (41 in
TrethC Control Plan requirements and as approved by the Traffic Operations Engineer. d
depth may use materials approved by the Engineer or Materials Lab for backfilling below the
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s (
I '
SECTION 4 application s
shall be crushed surfacing top course material. The trench shall be compacted to a minimum
d in Section 2 -03 of the Standard Specifications. In
paved portion o
the top six feet (6) of any trench, backfill compaction shall be performed in eight to 12 -inch (8.12 ")
by the perm Iles, their contractor or engineer and demonstration of an equivalent alternative. (
All compaction shall be pedonned by mechanical methods. The compaction tests may be
TKe Engineer may determine in the field that a full slreel -width (adge of- pavement to edge-0f- pavement) p
performed in maximum four -foot (4) vertical increments. The lest results shall be given to the
- b
be determined by the Engineer.
2. The trench width was increased significantly or the existing pavement is undermined or (
(cold mix), Asphalt Treated Base (ATE), or steel plates, as approved by the Engineer. ATB used
damaged. f
for temporary restoration may be dumped directly into the trench, bladed out and rolled. After
rolling, the trench must be filled Bush with asphalt to provide a smooth riding surface. If the
3. Any other construction related activities that require additional pavement resloTation. t
temporary msloration does not hold up, the Contractor shall repair the patch within eight hours of
being notified of the problem by the City. This requirement applies 24 hours per day, seven days a
week. In the event that the City determines to repair the temporary patch, the contactor shall
SECTION 6 CITY OF RENTON STANDARDS r
n that doubt the i s cost in Ripening the tch with the
1. All materials and workmanship shall be in accordance with the City of Renton Standard and s
second half of the reimbursement to represent City overhead and hidden costs.
Supplemental Specifications (current adopted version) except where otherwise noted in these
5. Asphalt Concrete Class E or Class B shall be placed to the compacted depth as required and
Standards. Materials and workmanship are required to be in conformance with standards f
indicated on City of Renton Standard Plans #HR -05, HR -23, and HR -22 (SP Pages #H032,
State Chapter of the American Public Works Association (APWA) and the Washington State H
H032A, and H033) or as directed by the Engineer. The grade of asphalt shall be AR4000W. The
Department ofTransportation(WSDOT) and shall comply with the most current edition, as m
materials shall be made in conformance with Section 9-02.1(4) of the Standard 5pecficolions.
modified by the City of Renton Supplemental Specifications.
6. Tack coat shall be applied to the existing pavement at edge of saw cuts and shall be emulsified
An asphalt paver shall be used in accordance with Section 5 -04.3(3) of Standard a
asphalt grade CSS-1, as specified in Section 9- 02.1(6) of the Standard Specifications. Tack shall
Specifications. A "Layton Box" or equal maybe used in place of the power - propelled paven b
be applied as specified in Section 5-04 of the Standard Specifications.
' Rollers shall be used in accordance with Section 5. 04.3(4) of the Standard Speciricalfons.
I shall Ira in accordance with Section 5-04 o
Compactors" and "
of o
2. Trench backfill and resurfacing shall be as shown in the City of Renton Standard Details, unless c
concrete shall he displaced laterally a minimum of twelve inches (12 "), unless otherwise approved
modified by the City Permit. Surfacing depths shown in the Standard Details are minimums and b
by the Engineer. Fine and coarse aggregate shall be in accordance with Section 9-03.8 of the
may be increased by the Engineer to meet traffic loads or site conditions. S
Standard Spscfcations.
SECTION 7 requirement PATCHING, overlay, requirement for PATCHING, A
All street surf aces, walks or driveways within the sleet trenching areas shall be feathered and
All trench and pavement owls shall be made by sawcut or by grinding. Sawcuts or grinding shall be a s
shimmed to an extent that provides a smooth -riding connection and expeditious drainage flow for
minimum of one fool (1') outside the trench width. The lop two inches (2") of asphalt shall be ground t
the newly paved surface.
- down to a minimum distance of one foot IV) beyond the actual outside edges of the trench and shall be
replaced with two inches (2 ") of Class B asphalt, per City of Renton Standards. At the discretion of the F
Feathering and shimming shall not decrease the minimum vertical curb depth below four inches
• engineer, a full street width oveday may be required. (
(4 ") for storm water Bow. The Engineer may require additional grinding to increase the curb depth
available for storm water Bow in areas that are inadequate. Shimming and feathering, as required
Lane -width or a full street -width oveday will be determined based upon the location and length of the b
by the Engineer, =- -hall be accomplished by Taking out the orerzed aggregates from the Class B
proposed trench within the roadway cross - section. Changes in field conditions may wamanl m
mix as appropriate.
implementation of additional oveday requirements.
Surface smoothness shall be per Section 5-04.3(13) of the Standard Specdmafbns The paving
1. Trenches (Road Crossings 1: s
shall be corrected by removal and repaving of the tench only. Asphalt patch depths Will vary
based upon the sheets being trenched. The actual depths of asphalt and the work to be
a. The minimum width of a transverse patch (road crossing) shall he six and one -half feel p
i n i ofR Renton Standard Plans HR -23
' (63). See City of Renton Standard Plan Drawing #HR -23 (SP Page: H032A). a
and HR -22 (SP Pages #H032, H032A, and H033).
b. Any affected lane will be ground down two inches (2") and paved for the entire width of the
lane. C
Compaction of all lifts of asphalt shall be a minimum ninety-Iwo percent (92 %) of density as
- minimum of an entire traveled lane. t
the Engineer.
If the outside of the trenching is within three feet (3') of any adjacent lane line, the entire
adjacent traveled lane affected will be mpaved T
Testing shall be performed by an independent testing lab with the results being supplied to the
J. An area including the trench and one foot (i) on each side of the trench but not less than E
Engineer. Testing is not intended to relieve the contractor from any liability for the trench
six and one half feel (6.5') total for the entire width of the affected traveled lanes will be r
restoration. It is intended to show the inspector, and the City, that the restoration meets these
' ground down to a depth of two inches IT). A two -inch (2 ") oveday of Class B asphalt will be s
specifications.
applied per City standards.
8. All joints shall he sealed using paving asphalt AR 4000W.
2. Trenches Running Parallel With the Street:
The minimum width of a longitudinal patch shall be four and one -half feel (4.51, See City of 9
9. When trenching within the unpaved roadway shoulder(s), the shoulder shall be restored to No
Renton Standard Plan Drawing NHR-05 (SP Page H032). o
original condition, or better.
b. If the trenching is within a single (raveled lane, an entire lane W fifth oveday will be required,
If the outside of the trenching is within three feet IT) of any adjacent lane line, the entire 1
10. The final patch or oveday shall be completed as Soon as possible and shall nol exceed fifteen
adjacent traveled lane affected will be overlaid. (
(151 working days after first openiml the tench. This time frame maybe adjusted Kdelays are due
' c
c. If the trenching is greater than, or equal to 30% of lane per block (660 -foot maximum block t
to inclement paving weather or other adverse conditions that may exist. However, delaying of final
length), or if the total patches exceed 12 per block, then the lanes affected will be overlaid. p
patch or oveday work is subject to the Engineers approval. The Engineer may deem it necessary
• M
Minimum overlay shall include all patches within the block section. t
to complete the work within the fifteen (15) working day time frame and not allow any time
d. The entire traveled lane width for the length of the trench and an additional ten feet (10) at e
extension. Should this occur, the Contractor shall perform the necessary work, as directed by the
' e
each end of the trench will be ground dawn to a depth of two inches IT). A two-inch (2') E
Engineer.
oveday of Class B will be applied per City standards.
Potholing: Potholing shall meet the same requirements as trenching and pavement 1
11, A City of Renton temporary Traffic Control Plan (from Renton Transportation Engineering) shall
restoration. Potholing shall be a minimum Of one fool (1) beyond the excavation. NI b
be submitted and approved by the Engineer a minimum of three (3) wonting days prior to
affected lanes will be ground down to a depth of two inches (2 ") and paved not less than six c
commencement of work.
;. 2., -. a
and one half feel (6.5') wide for the entire width of the lane. Potholes greater than five feel
(6) in length, width or diameter shall be restored to trench restoration standards. In all S
SECTION 10 REMOVAL OF UTILITY LOCATE MARKINGS FROM SIDEWALKS REWIRED
cases, potholes shall be repaired per Renton Standard Plan If HR05 (SP Page H032).
Restoration requirements utilizing vector equipment will be determined by the T
The Perrnittee will be required to remove utility locate marks on sidewalks only within the Dwmlown
engineer. C
Core Area. The permitlee shall remove the utility locale marks within 14 days of job completion.
MATCHLINE SEE ABOVE
0
FR 1'('7
Just! irrtwk
RECOMMENDED FOR APPROVAL
CALL 48 BOVRa
BY: DATE:
BEFORE YOU D10
BY: DATE:
BY: DATE:
i -809 -434 -6868
CHECKED FOR COMPLIANCE TO
stir
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CITY STANDARDS
BY: DATE: BY: rLt/ DATE:1Z
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BY: DATE:
BE US I
THE T E CO T CONTRACTORS E��L RESPONSIBILITY ,.....,,..ERMINE _ALY.
THE IT EXACT
BE THE THE CONTRACTOR'S RESPONSIBILITY TO DETERMINE THE EXACT
VERTICAL AND HORIZONTAL LOACATION OF ALL EXISTING UNDERGROUND
WATER & SEWER
UTILITIES PRIOR TO COMMENCING CONSTRUCTION. NO REPRESENTATION
IS MARE THAT ALL EXISTING UTILITIES ARE SHOWN HERON, THE ENGINEER
ASSUMES NO RESPONSIBILITY FOR UTILITIES NOT SHOWN IN THEIR PROPER
LOCALTION.
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PATRICK HARRON &
ASSOCIATES, LL)
Patrick Harron &
Associates, LLC
Engineering
Planning
14900 1- 1.1ban Ave. S.
Suit¢ Number 279
Seattle, WA 98166
T 206.674.4659
F 206.674 4660
05123 eKSO
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Water Utility Notes and Specifications:
1. THESE NOTES SHALL APPEAR FOR PROJECTS FOR THE WATER UTILITY.
2. All work material shall be in conformance with the standards and specifications of the City of Renton
Planning /Building /Public Works Department and the 1996 edition of the WSDOT /APWA Standards and
Specifications, as approved and modified by the City of Renton in the Renton Standard Plans &
Specifications. A set of approved plans shall be kept on site at all times during construction.
3. The hours of work in the street right of way shall be limited to 8:30 AM to 3:30 PM on weekdays
unless otherwise approved in writing by the Public Works Department at (425) 430 -7301. The Police
Department, Fire Department, and 911 shall be notified 24 hours in advance of any work in the right of
way.
4. All locations of existing utilities shown are approximate and it shall be the contractor's responsibility to
verify the true and correct location so as to avoid damage or disturbance. For utility locates call
48 -hour locators 800 - 424 -5555.
5. An approved Traffic Control Plan is required to be submitted at the Pre - Construction meeting.
6. All watermain pipe is to be cement lined ductile iron pipe conforming to AWWA C110 and Clll or
latest revision, thickness Class 52. Cement mortar lining and seal coating shall conform to AWWA C104
or latest revision. Pipe joints to be push -on or mechanical joint. Bedding to be Class C. All ductile iron
pipe and fittings shall be polyethylene wrapped per ANSI /AWWA C105/A21.5 -93 Standards.
7. Cast iron and ductile iron fittings shall be cement lined, pressure rated as noted on plans, and in
accordance with ANSI /AWWA C110 /A21.10 -87. Cement lining shall be in accordance with ANSI /AWWA
C104/421/4 -90. If fittings are 3 to 12 inches in diameter and have mechanical joints, the fittings shall
in accordance with either ANSI /AWWA C110- A21.10 -87 or ANSI /AWWA C153/A21.53 -94. Three (3)
inch to 12 inch diameter fittings, which have mechanical joints and /or flanged joints, shall be in
accordance with ANSI /AWWA C110 /A21.10.87 or a combination of ANSI /AWWA C110/A21.10.87 and
ANSI /AWWA C153/A21.53 -94 such that the portion of the fitting with a mechanical joint(s) may be with
ANSI /AWWA C153/A21.53 -94 and that portion of the fitting with flanged joint(s) shall be in accordance
with AWWA C110/A21.10 -87. Acceptance testing in accordance with section 53.53 of ANSI /AWWA
section 10 -4.3 of ANSI /AWWA C110/A21.10 -87 shall be obtained by the contractor and transmitted to
the owner.
8. Gate vales shall be iron body, bronzed - mounted, double disc with bronze wedging device and 0 -ring
stuffing box (AWWA C500) or of resilient seated type (AWWA C509). Valves shall be designed for a
minimum water operating pressure of 200 psi. Gate valves shall be Clow List 14, Mueller Company NO.
A2380 or M & H.
9. Fire hydrants shall be Corey type (opening with the pressure) or compression type (opening against
pressure) conforming to AWWA C- 502 -85 with a 6 inch mechanical joint inlet and a main valve opening
(M.V.O.) of 5 -1/4 inch, two 2 -1/2 inch hose nozzles with National Standard Threads 7 -1/2 threads per
inch and one 4 inch pumper nozzle with the new Seattle Pattern 6 threads per inch, 60 degrees V.
Threads: outside diameter of male thread 4.875 and root diameter 4.6263. Hydrants shall have a 1 -1/4
inch pentagon operating nut opened by turning counter clockwise (left).
10. The two 2 -1/2 inch hose nozzles shall be fitted with cast iron threaded caps with operating nut of the
same design and proportions as the hydrant stem nut. Caps shall be fitted with suitable neoprene
gaskets for positive water tightness under test pressures.
11. The 4 inch pumper nozzle shall be fitted with a Storz adapter, 4 inch Seattle Thread x 5 inch Storz.
Storz adapter shall be forged and /or extruded 6061 -T6 aluminum alloy, hardcoat anodized. Threaded
end portion shall have no lugs and two set screws 180 degrees apart. Storz face to be metal, no gasket
to weather. Storz cap to have synthetic molded rubber gasket, and shall be attached to hydrant
adapter with 1/8 inch, coated, stainless steel, aircraft cable.
12. Fire hydrants shall be painted with two coats of paint. Preservative paint number 43 -655 safety
yellow or approved equal.
13. Pumper connection to face roadway assembly.
14. Fire hydrants shall be installed per City of Renton Standard Detail for fire hydrants, latest revision.
15. All watermains 10 inches and smaller to maintain a minimum cover of 36 inches below finish grade.
All watermain 12 inches and larger shall be at a minimum of 48 inches below finish grade. Where utility
conflicts occur, watermains are to be lowered to clear.
16. All watermains 6 inches and larger in diameter shall be cleaned with pipe cleaning "PIGS" prior to
disinfection. The "Poly pigs" shall be Girard Industries Aqua Swab -AS or approved equal, 2 lb/cu. ft.
density foam with 90A durometer urethane rubber coating on the rear of "PIG" only.
17. "PIGS" shall be cylinder shaped with bullet nose or square end. The contractor will perform the
cleaning operation.
18. All watermains and services shall be pressure tested to a minimum of 200 psi or 150 psi over
operating pressure, in accordance with the specifications of the City of Renton and the Washington
State Health Department. All pressure testing shall be done in the presence of a representative of the
City of Renton. The quantity of water lost from the main shall not exceed the number of gallons per
hour as listed in City of Renton Standard Plans & Specifications 7- 11.3(11). The loss in pressure shall
not exceed 5 psi during the 2 hour test period.
19. All watermains and services shall be disinfected by the injection of a 50 ppm (minimum concentration)
chlorine /water solution. Dry Calcium Hypochlorite shall NOT be placed in the pipe as laid. Chlorine
shall be metered /injected in accordance with Section 7- 11.3(12)E or 7- 11.3(12)F of the Standard
Specifications referenced above.
20. A pre - construction conference is required prior to any construction. A minimum of five (5) working
days notice is required for scheduling.
21. Twenty-four (24) hours notice will be required prior to starting new construction.
22. It shall be the contractor's responsibility to secure all necessary permits prior to starting construction.
23. Installation of corporate stops, water services, lines and meters shall not be done until all service
agreements, meter applications, construction permits, and payment of fees have been made to the City
of Renton.
24. All connection to existing mains is to be accomplished by the City of Renton, except wet taps, which
may be made by approved wet tap contractors with prior approval from the Public Works Department.
All necessary excavation and materials are to be supplied by the contractor and be on -site prior to City
notifications.
25. Inspection will be accomplished by a representative of the City of Renton. It shall be the contractor's
responsibility to notify Development Services twenty four (24) hours in advance of backfilling all
construction. The contractor, as well as the engineers, shall keep as -built drawings.
26. Contractor to provide plugs and temporary blow -off assemblies for testing and purity acceptance prior
to final tie -in.
FOSTER SHORT PLAT
SE OF SECTION 19, TOWNSHIP 23, RANGE 05, W.M.
27. All joint restraint systems (shackle rods, nuts, bolts, etc.) shall be as manufactured by the Star
Manufacturing Company of Columbus Ohio, or equal, approved in writing by the Public Works Department.
28.Asphalt and concrete street paving shall be sawcut to a minimum depth of two (2) inches. Oil mat streets
may be spade cut. All surface concrete, pavement, sidewalks, curb, gutters, and driveway approaches shall
be sawcut to a minimum depth of two (2) inches or removed to an existing expansion joint.
29.A temporary cold mix asphalt patch shall be placed on the day of initial excavation with a permanent,
sealed patch to be placed, to City of Renton policy, within 10 days. Call for subgrade inspection prior to
placement of final patch. *
30.For City projects such as telemetry conduit, the PVC pipe used shall be All chemical process lines shall be
schedule 80 PVC pipe. Schedule 40 in unimproved areas and schedule 80 PVC pipe under improved areas.
Sanitary Sewer Notes and Specifications
1. All work materials shall be in conformance with the standards and specification of the City of Renton
Utility Department and the latest edition of the WSDOT /APWA Standards and Specifications.
2. All construction shall be in accordance with "Standard Specifications for Municipal Public Works
Construction" prepared by Washington State Chapter American Public Works Association, latest edition
(APWA) and City of Renton Standard Specifications.
3. All locations of existing utilities shown are approximate and it shall be the contractor's responsibility to
verify the true and correct location so as to avoid damage or disturbance.
4. Contractor is solely responsible for the means, methods and sequences of construction and for the
safety of workers and others on the construction site.
5. It shall be the responsibility of the contractor to obtain street use and any other related permits -prior
to any construction.
6. Plans approved by the City of Renton, Public Works Department shall take precedence over all other
plans.
7. A copy of these approved plans must be on the job site whenever construction is in progress.
8. The contractor shall provide the City of Renton with an as -built drawing of the sanitary sewer system,
which has been stamped and signed by a licensed professional engineer or licensed professional
surveyor.
9. Backfill shall be placed equally on both sides of the pipe in layers with a loose average depth of 6
inches, maximum depth of 8 inches, thoroughly tamping each layer to 95 percent of maximum density.
These compacted layers must extend for one pipe diameter on each side of the pipe or to the side of
the trench. Materials to complete the fill over pipe shall be the same as described. ,
10. Open cut road crossings for utility trenches on existing traveled roadway shall be backfilled with
crushed rock and mechanically compacted. Cuts into the existing asphalt shall be neatline cut with saw
in a continuous line. A temporary mix patch must be placed immediately after backfill and compaction.
A permanent hot mix patch shall be placed within 10 days and shall be per City of Renton current
standards.
11. Datum shall be City of Renton, 1988 NAVD.
12. All disturbed areas shall be seeded and mulched or otherwise stabilized to the satisfaction of the
Department for the prevention of on -site erosion after the completion of construction.
13. All pipe and appurtenances shall be laid on a properly prepared foundation in accordance with Section
7 of the current State of Washington Standard Specifications for Road and Bridge Construction. This
shall include necessary leveling of the trench bottom or the top of the foundation material, as well as
placement and compaction of required bedding material, to uniform grade so that the entire length of
the pipe will be supported on a uniformly dense, unyielding base. Pipe bedding shall be pea gr6vel.6
inches above and below the pipe.
14. Sanitary sewer pipe shall be polyvinyl chloride (PVC) rubber gasketed ASTM D 3034, SDR 35, or
ductile iron class 50.
15. In unimproved areas, manhole to extend minimum 6 inches and maximum 12 inches above finished
grade. In paved area, cover must slope in all directions to match paving.
TALBOT ROAD SOUTH TEMPORARY ROADWAY SECTION
NITS
12'
ASPHALT DRIVEWAY 2° COMP. DEPTH CL B ACP
NTS 0.6" CSBC
Oery�l
ROCKED CONSTRUCTION ENTRANCE
N. T. S.
Surface Water Drainage Notes and Specifications
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE - CONSTRUCTION
MEETING MUST BE HELD WITH THE CITY OF RENTON PLAN REVIEWER.
2. All construction shall be in accordance with the current Standard Specifications for Road, Bridge and
Municipal Construction prepared by WSDOT and the American Public Works Association (APWA), as
amended by the City of Renton Public Works Department.
3. The surface water drainage system shall be constructed according to the approved plans, which are
on file in the Public Works Department. Any deviation from the approved plans will require written
approval from the City of Renton Public Works Department, Surface Water Utility Section.
4. A copy of these approved plans must be on the job site whenever construction is in progress.
5. Datum shall be NAVD 88 unless otherwise approved by the City of Renton Public Works Department.
Reference benchmark and elevations are as noted on the plans.
6. All sedimentation /erosion facilities must be in operation prior to clearing and building construction,
and they must be satisfactorily maintained until construction is completed and the potential for on -site
erosion has passed.
7. All retention /detention facilities must be installed and in operation prior to or in conjunction with all
construction activity unless otherwise approved by the Public Works Department, Surface Water Utility
Section.
8. Grass seed may be applied by hydroseeding. The grass seed mixture, other than City of Renton
approved standard mixes, shall be submitted by a Landscape Architect and approved by the Public
Works Department, Surface Water Utility Section.
9. All pipe and appurtenances shall be laid on a properly prepared foundation in accordance with Section
7- 02.3(1) of the current State of Washington Standard Specification for Road and Bridge Construction.
This shall include necessary leveling of the trench bottom or the top of the foundation material, as well
as placement and compaction of required bedding material, to uniform grade so that the entire length
of the pipe will be supported on a uniformly dense, unyielding base. All pipe bedding shall be APWA
Class "C ", with the exception of PVC pipe. All trench backfill shall be compacted to minimum 95% for
pavement and structural fill and 90% otherwise per ASTM D- 1557 -70. Pea gravel bedding shall be 6
inches over and under PVC pipe.
10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have asphalt treatment
#1 or better inside and outside.
11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage pipe, or 15
feet from the top of any channel bank.
12. All catch basin grates shall be depressed 0.10 feet below pavement level.
13. Open cut road crossings through existing public right of way will not be allowed unless specifically
approved by City of Renton Planning /Building /Public Works Administrator.
14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry rock placed
to a depth of one (1) foot and must meet the following specifications:
4 - 8 inch rock / 40 - 70% passing;
2 - 4 inch rock / 30 - 40% passing; and
less than 2 inch rock / 10 - 20% passing.
15. All building downspouts and footing drains shall be connected to the storm drainage system, unless
approved by the City plan reviewer or Surface Water Utility Section. An accurately dimensioned,
certified as -built drawing of this drainage system will be submitted to the City upon completion.
16. Issuance of the building or construction permits by the City of Renton does not relieve the owner of
the continuing legal obligation and /or liability connected with storm surface water disposition. Further,
the City of Renton does not accept any obligation for the proper functioning and maintenance of the
system provided during construction.
17. The Contractor shall be responsible for providing adequate safeguard, safety devices, protective
equipment, flaggers, and any other needed actions to protect the life, health, and safety of the public,
and to protect property in connection with the performance of work covered by the contract. Any work
within the traveled right of way that may interrupt normal traffic flow shall require a traffic control plan
approve by the Public Works Department, Transportation Systems Division. All sections of the WSDOT
Standard Specifications 1 -07 -23 Traffic Control shall apply.
18. Special drainage measures will be required if the project location is within the aquifer protection area
(APA).
3 3 3
0.75' 1
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DRAINAGE -SWALE
N. T. S.
RECOMMENDED FOR APPROVAL
BY: DATE:
BY: DATE:
BY: DATE:
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.!%% STANDARDS
BY: DATE:
BY: DATE:
BY: DATE:
NOTE:
EXISTING UTILITY LOCATIONS SHOWN ARE APPROXIMATE ONLY. IT SHALL
BETH THE CONTRACTOR'S RESPONSIBILITY TO DETERMINE THE EXACT
VERTICAL AND HORIZONTAL LOACATION OF ALL EXISTING UNDERGROUND
UTILITIES PRIOR TO COMMENCING CONSTRUCTION. NO REPRESENTATION
IS MARE THAT ALL EXISTING UTILITIES ARE SHOWN HERON. THE ENGINEER SHEET 5 O F 8
ASSUMES NO RESPONSIBILITY FOR UTILITIES NOT SHOWN IN THEIR PROPER
LOCALTION.
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