HomeMy WebLinkAboutR-376005Surface Water Drainage Notes and Specifications
1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE -CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENON PLAN REVIEWER.
2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE STANDARD SPECIFICATIONS FOR ROAD, BRIDGE AND MUNICIPAL CONSTRUCTION PREPARED BY
NWSDOT 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
a DEPARTMENT. ANY DEVIATION FROM THE APPROVED PIANS WILL REQUIRE WRITTEN APPROVAL FROM THE CITY OF RENTON PUBUC WORKS DEPARTMENT,
d SURFACE WATER UTILITY SECTION.
d 4. A COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS.
5. DATUM SWU1 BE NAVD 88 UNLESS OTHERWISE APPROVED 81' THE CITY OF RENTON PUBUC WORKS DEPARTMENT. REFERENCE BENCHMARK AND ELEVATIONS
ARE NOTED ON THE PIANS.
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 RETB!RION/DETENTION FACILITES 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.
B. 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 UTUTY SECTION.
9. ALL PIPE AND APPURTENANCES SHALL BE LAD ON A PROPERLY PREPARED FOUNDATION IN ACCORDANCE WITH SECTION 7-08.3(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 MATERIA., AS WELL AS PLACEMENT AND COMPACTION OF REQUIRED BEDDING MATERIA., TO UNIFORM GRADE SO THAT THE
ENTRE 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 AL 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 SIWl 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. AL 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 SW41 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 LEGA OBLIGATION
AND/OR LIABILITY CONNECTED WITH STORM SURFACE WATER DISPOSITION. FURTHER, THE CITY OF RENON DOES NOT ACCEPT ANY OBUGATION 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, HEATH, 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 NORMA. TRAFFIC FLOW SHAT REQUIRE A TRAFFIC
CONTROL PUN APPROVE BY THE PUBLIC WORKS DEPARTMENT, TRANSPORTATION SYSTEMS DIVISION. AL 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).
19. THE FOOTING DRAINAGE SYSTEM AND THE ROOF DOWNSPOUT SYSTEM SHALL NOT BE INTERCONNECTED UNLESS SUCH CONNECTION IS AT LEAST 1 FOOT
BELOW THE FOOTING DRAINAGE SYSTEM AND DOWNSLOPE OF THE BUILDING FOUNDATION. ROUTE FTG DRAINS THROUGH A CB PRIOR TO CONNECTION.
20. PROVIDE AND MAINTAIN TEMPORARY SEDIMENTATION COLLECTION FACILITIES TO ENSURE SEDIMENT OR OTHER HAZARDOUS MATERIAL DO NOT ENTER THE STORM
DRAINAGE SYSTEM.
21. PRIOR TO FINAL INSPECTION AND ACCEPTANCE OF STORM DRAINAGE WORK, PIPES AND STORM DRAIN STRUCTURES SHALL BE CLEANED AND FLUSHED. ANY
OBSTRUCTIONS TO FLOW WITHIN THE STORM DRAIN SYSTEM, (SUCH AS RUBBLE, MORTAR AND WEDGED DEBRIS), SHAT BE REMOVED AT THE NEAREST
STRUCTURE WASH WATER OF ANY SORT SHALL NOT BE DISCHARGED TO THE STORM DRAIN SYSTEM OR SURFACE WATERS.
22. DRAINAGE PIPE WITHIN THE RIGHT OF WAY WITH LESS THAN 2 FEET OF COVER SHALL BE DUCTILE IRON.
23. CONTRACTOR SFIA1 FIELD VERIFY I.E. AT ALL CONNECTIONS TO EXISTING. IF MEASURED I.E. DOES NOT MATCH I.E. SHOWN
ON THESE DRAWINGS, CALL ENGINEER PRIOR TO COMMENCING CONNECTION.
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29476 12840 81ST AVENUE NE
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CITY OF RENTON
6" FREE DRAINING APPROVED BY: DATE: p
OR GRAVEL BASE APPROVED BY: DATE IVU
PERMEABLE PAVEMENT DETAIL
APPROVED B DATE: 1-04gY_
APPROVED BY: DATE: 3 _
CITY OF BLAKEY TOWNHOMES X12-3-13
RENTON 604 MORRIS AVENUE S RECORD
IWAS
RENTON, WA 98055 SUNNI
Planning/Building/Public Works Dept.
DRAINAGE & PAVING DETAILS & NOTES SRI
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