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HomeMy WebLinkAboutR-408004RECOMMENDED CONSTRUCTION SEQUENCING INFILTRATION FACILITY SECTION BY STAGE H SCALE: 1 "=20', V SCALE: 1 "=5' DESIGNER I DRAWN BY I CHECKED BY CD I TT I RG a NO. REVISION COMMENTS BY REVIEW DATE n , ADDENDUM NO. 3 CDD CDD 10/02/2023 N CITY OF RENTON PUBLIC WORKS 1055 SOUTH GRADY WAY, 5TH FLOOR- RENTON, WA 98057 MONROE AVE NE INFILTRATION FACILITY CITY PROJECT SWP-27-4080 Otak in 11241 Willows Road NE, Suite 200 Redmond, WA 98052 425.822.4446 www.otak.com GENERAL NOTES: 1. INFILTRATION FACILITY BACKFILL WITH IMPORTED INFILTRATION GRAVEL AND SELECT BORROW SHALL BE PERFORMED PRIOR TO OTHER SITE DISTURBING ACTIVITY. THIS WORK IS FURTHER DESCRIBED BELOW UNDER STAGE 1 WORK. ONCE THE INFILTRATION FACILITY BACKFILL IS INSTALLED AND STABILIZED, OTHER ONSITE WORK MAY PROCEED AS DESCRIBED UNDER STAGE 2 WORK. DO NOT DIRECT STORMWATER OR GROUNDWATER FROM THE CONSTRUCTION SITE OR OFFSITE AREAS TO THE FACILITY UNTIL AFTER THE SITE HAS BEEN STABILIZED AND THE STORMWATER TREATMENT FACILITIES HAVE BEEN INSTALLED. 2. CONTRACTOR SHALL MINIMIZE TRACKING ACROSS BACKFILL TO THE MAXIMUM EXTENT FEASIBLE. 3. PROTECTION OF THE ENVIRONMENT: NO CONSTRUCTION RELATED ACTIVITY SHALL CONTRIBUTE TO THE DEGRADATION OF THE ENVIRONMENT, ALLOW MATERIAL TO ENTER SURFACE OR GROUND WATERS, OR ALLOW PARTICULATE EMISSIONS TO THE ATMOSPHERE WHICH EXCEED STATE OR FEDERAL STANDARDS. ANY ACTIONS THAT POTENTIALLY ALLOW A DISCHARGE TO STATE WATERS MUST HAVE PRIOR APPROVAL OF THE WASHINGTON STATE DEPARTMENT OF ECOLOGY SITE PREPARATION: 1. ATTEND PRE -CONSTRUCTION MEETING WITH CITY. 2. FLAG AND FENCE CLEARING LIMITS AND VEGETATION TO BE PROTECTED PER SHEETS C201, C202, AND C204. 3. INSTALL PERIMETER PROTECTION (SILT FENCES, ETC.) AND TESC BMPS. 4. REMOVE LIGHT POLE SHOWN ON SHEET C201 TO ALLOW FOR INSTALLATION OF CONSTRUCTION ENTRANCE AND ACCESS ROAD 5. GRADE AND INSTALL CONSTRUCTION ENTRANCE AND ACCESS ROAD. 6. MAINTAIN TESC MEASURES IN ACCORDANCE WITH THE PROJECT SPECIFICATIONS, CITY OF RENTON STANDARDS, AND MANUFACTURER'S RECOMMENDATIONS. 7. RELOCATE, ADJUST, AND/OR INSTALL ADDITIONAL TESC MEASURES AS REQUIRED TO COMPLY WITH CITY TESC MINIMUM REQUIREMENTS AS THE SITE CONDITIONS CHANGE. STAGE 1 WORK: 1. INSTALL GEOTEXTILE AS SHOWN THROUGHOUT STAGE 1 WORK. 2. INSTALL PROJECT SIGN. 3. BACKFILL INFILTRATION ZONE UNDER INFILTRATION FACILITY WITH SELECT BORROW PER PROJECT SPECIFICATIONS IN 2-FOOT MAX. LIFTS TO ELEVATION SHOWN. SELECT BORROW IS TO BE INSTALLED PER PROJECT SPECIFICATIONS, AND SHALL NOT RECEIVE VIBRATORY COMPACTION TO MAINTAIN NECESSARY INFILTRATION RATES. 4. INSTALL GRAVITY BLOCK WALL AS SHOWN ON SHEET S604 IN CONJUNCTION WITH BACKFILLING OF INFILTRATION AND NON -INFILTRATION ZONES TO PROVIDE SEPARATION. 5. BACKFILL NON -INFILTRATION ZONE WITH NON -INFILTRATION MATERIAL AND COMPACT PER SPECIAL PROVISIONS 2-03. 6. BACKFILL INFILTRATION ZONE UNDER INFILTRATION FACILITY WITH INFILTRATION GRAVEL (PER PROJECT SPECIFICATIONS) IN 2-FOOT MAX. LIFTS TO ELEVATION SHOWN. INFILTRATION GRAVEL WILL NOT BE COMPACTED BY VIBRATORY COMPACTOR WITH THE EXCEPTION OF THE UPPER 3 FEET. THE TOP 3 FEET SHALL BE COMPACTED TO 90% PROCTOR PER WSDOT METHOD B. STAGE 2 WORK: 1. INSTALL INFILTRATION CHAMBER GALLERY, CONCRETE MANIFOLD VAULT, AND ASSOCIATED PIPES AND STRUCTURES. 2. BACKFILL AREA SURROUNDING INFILTRATION CHAMBER GALLERY WITH GRAVEL BORROW. 3. BACKFILL AREA ABOVE STORMWATER INFILTRATION FACILITY GRAVEL WITH GRAVEL BACKFILL FOR WALLS. 4. BACKFILL EXCAVATED AREA WITH NON -INFILTRATION MATERIAL MATERIAL AS SHOWN AND COMPACT PER SPECIAL PROVISIONS 2-03. 5. INSTALL TREATMENT VAULT AND ASSOCIATED PIPES AND STRUCTURES. 6. CONNECT THE NEW STORM DRAINAGE SYSTEM TO THE STORM DRAINAGE SYSTEM IN MONROE AVE NE. 7. GRADE MAINTENANCE ACCESS ROAD. 8. INSTALL TOPSOIL TYPE A, PER WSDOT 9-14.2(1). RESTORATION 1. INSTALL CONC. CURB, PAVING, PAVEMENT MARKING, AND SIGNING. 2. INSTALL LUMINAIRE IN LOCATION SHOWN ON SHEET C502. 3. INSTALL FENCING AND GATES. 4. INSTALL LANDSCAPING. LEGEND SELECT BORROW INFILTRATION GRAVEL UNDISTURBED NATIVE MATERIAL TOPSOIL TYPE A NON -INFILTRATION MATERIAL EXISTING FILL MATERIAL GRAVEL BORROW GRAVEL BACKFILL FOR WALLS DESIGN REVISIONS MADE DURING CONSTRUCTION HAVE BEEN INCORPORATED INTO THESE "AS -BUILT" DRAWINGS, BUT ARE NOT HIGHLIGHTED/ CLOUDED FOR CLARITY. THESE "AS -BUILT" PLANS REFLECT DESIGN INFORMATION, INCLUDING PLAN REVISIONS MADE DURING CONSTRUCTION, WITH "AS -BUILT" INFORMATION PROVIDED BY THE CONTRACTOR. OTAK HAS NOT REVIEWED THE INFORMATION SUPPLIED BY THE CONTRACTOR FOR ACCURACY AND HAS NOT SURVEYED TO VERIFY THE "AS -BUILT" CONDITIONS SHOWN. CHARLES DEWEY, P.E 3/14/2025 PROPOSED PERMANENT EASEMENT LINE NON -WOVEN GEOTEXTILE FOR UNDERGROUND DRAINAGE, MODERATE SURVIVABILITY, CLASS C, PER WSDOT STANDARD SPEC 9-33.2(1) {} MIRAFI FW402, OR APPROVED EQUAL, PER SPECIAL PROVISIONS SECTION 2-12. CALL BEFORE YOU DIG 1-800-424-5555 OTAK 33201.A PROJECT NUMBER CONSTRUCTION SEQUENCING I C004 DRAWING NO. R-408004 I SHEET: 4 OF 36 © 2023 OTAK, INC.