RV-26-00006 - Yakama Nation Habitat Restoration Project Variance File

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GENERAL NOTES GENERAL: GRS WALLS: MATERIALS: A PREFABRICATED STEEL BRIDGE IS TO BE INSTALLED AT THIS SITE. GRS WALLS WERE DESIGNED IN ACCORDANCE WITH WSDOT GEOTECHNICAL CONCRETE: BRIDGE SILL------ ----- F'D=4.0 KSI CONTRACTOR TO PROCURE BRIDGE,BACKWALL AND PRECAST CONCRETE DESIGN MANUAL,THE LATEST AASHTO STANDARD SPECIFICATIONS FOR CMU CONCRETE-CLASS 35A------ F'c=3.5 KSI SILL WITH STAMPED DRAWINGS AND STRUCTURAL CALCULATIONS.DESIGN HIGHWAY BRIDGES DIVISION 1 DESIGN,SECTION 5,RETAINING WALLS, METAL REINFORCEMENT: ASHTO M31 GRADE 60 ——— Fy=60 KSI FOR THE GRS IBS FOUNDATION ARE INCLUDED IN THIS PLAN SET. PARTS A AND B;AND FHWA:GRS-IBS INTERIM IMPLEMENTATION GUIDE.THE REINFORCEMENT GEOTEXTILE(AT 2%STRAIN): ---- T2%=960 PLF CONTRACTOR SHALL PROCURE MATERIALS SPECIFIED HEREIN. FOLLOWING TABLE SUMMARIZES THE SOIL INFORMATION USED IN THE WALL REINFORCEMENT GEOTEXTILE(AT ULTIMATE STAIN)— TU=4800 PLF DESIGN.OTHER INFORMATION USED FOR THE WALL DESIGN CAN BE FOUND THE STRUCTURAL CONTRACT DRAWINGS AND SPECIFICATIONS REPRESENT IN THE GEOTECHNICAL REPORT BY GEOENGINEERS AVAILABLE WITHIN HOT ROLLED WIDE FLANGE FOR SUPERSTRUCTURE SHALL BE AASHTO M270 THE FINISHED STRUCTURE.THEY DO NOT INDICATE THE METHOD OF PROJECT DOCUMENTS. GRADE 50W STEEL. CONSTRUCTION.THE STRUCTURE IS DESIGNED TO BE A STABLE UNIT AS A COMPLETED WHOLE.IT IS THE CONTRACTOR'S RESPONSIBILITY TO DESIGN, INCIDENTAL ITEMS: ERECT AND INSPECT TEMPORARY SHORES,BRACES,ETC.TO SUPPORT THE GRS WALL DESIGNED WITH THESE PARAMETERS STRUCTURE AGAINST ALL ANTICIPATED LOADS INCLUDING GRAVITY,WIND ALL ITEMS SHOWN OR NOTED ON PLANS WHICH ARE NOT SPECIFICALLY BID AND LATERAL EARTH PRESSURE UNTIL ITS COMPLETION.OBSERVATION WET WSDOT ITEMS ARE CONSIDERED INCIDENTAL ITEMS.THE COST OF FURNISHING AND VISITS TO THE SITE BY THE STRUCTURAL ENGINEER SHALL NOT INCLUDE UNIT COHESIO FRICTION INSPECTION OF THESE METHODS OF CONSTRUCTION. SOIL WEIGHT N(PSF ANGLE MATERIAL INSTALLING INCIDENTAL ITEMS WILL NOT BE PAID FOR SEPARATELY,BUT (DEGREE) REF. WILL BE INCLUDED IN THE UNIT PRICE BID FOR OTHER ITEMS.UNLESS NOTED (PCF) OTHERWISE. DESIGN BASIS: 9-03.12(2) THE BRIDGE STRUCTURE HAS BEEN DESIGNED IN ACCORDANCE WITH AASHTO LRFD REINFORCED 130 0 36 OR ALL COSTS ASSOCIATED WITH THE CONTRACTOR DESIGNED DESIGN SPECIFICATIONS 10TH EDITION 2024. BACKFILL 9-03.14(1) SUPERSTRUCTURE INCLUDING DESIGN,MATERIAL,TRANSPORTATION,AND DESIGN PROCEDURES: RETAINED SOIL 125 0 34 9-03.14(2) INSTALLATION OF THE RAILING,GIRDERS, BEARINGS,CORRUGATED DECK, SUPERSTRUCTURE IS CONTRACTOR DESIGNED.RAILING SHALL CONFORM TO TL-1 FOUNDATION SOIL 130 0 36 - AND GRADE BEAM ARE INCIDENTAL TO THE"STEEL SUPERSTRUCTURE"BID ITEM. REQUIREMENTS. NOTES: SUBSTRUCTURE DESIGN UTILIZES DESIGN RECOMMENDATIONS PROVIDE WITHIN GRS=GEOSYNTHETIC REINFORCED SOIL CONSTRUCTION SPECIFICATIONS: GEOTECHNICAL REPORT BY GEOENGINEERS DATED FEBRUARY 13,2026. IBS =INTEGRATED BRIDGE SYSTEM 1. SITE LAYOUT/SURVEY: CONSTRUCT THE BASE OF THE GRS ABUTMENT AND DESIGN LOADS: WINGWALLS WITHIN 1.0 INCH OF THE STAKED ELEVATIONS.CONSTRUCT THE PERMANENT LOADS: EXTERNAL GRS ABUTMENT AND WINGWALLS TO WITHIN±0.5 INCHES OF THE DC STRUCTURE SELF WEIGHT(ASSUMED)-------- 61.3 K PER ABUTMENT SURVEYED STAKE DIMENSIONS. DW INITIAL WEARING SURFACE(ASSUMED)-------- 64.0 K PER ABUTMENT EV UNIT WEIGHT OF SOIL ------- 0.135 KSF 2. EXCAVATION: COMPLY WITH OCCUPATIONAL SAFETY AND HEALTH EH ACTIVE PRESSURE ------------ --- 0.035KCF ADMINISTRATION(OSHA)FOR ALL EXCAVATIONS. TRANSIENT LOADS NE LOAD AND 3. COMPACTION: PLACE FILL IN MAXIMUM COMPACTED LIFTS OF 4-6 INCHES IN LL HL-93 TRUCK WITH LA TANDEM(ASSUMED) NE LOAD ----------- 96.8 K PER ABUTMENT CONJUNCTION WITH WALK BEHIND EQUIPMENT.LARGER LIFTS MAY BE IM DYNAMIC ALLOWANCE APPLIED TO TRUCK ALLOWED UP TO 12 INCHES DEPENDING ON EQUIPMENT..COMPACT AND TANDEM(LL+IM) ----------------- 118.5 K PER ABUTMENT WELL-GRADED AGGREGATE BACKFILL AT LEAST 95 PERCENT OF MAXIMUM 3.5 FEET DRY DENSITY AT OPTIMUM MOISTURE CONTENT(±2 PERCENT)PER AASHTO LS LIVE LOAD SURCHARGE AT ABUTMENT-------- . FEET T 99.FOR AN OPEN GRADED AGGREGATE,USE A METHOD SPECIFICATION LS LIVE LOAD SURCHARGE AT WING WALL-------- TU UNIFORM TEMPERATURE RANGE ----------- ODEG TO 80DEG F BASED ON THE LIFT THICKNESS,EQUIPMENT,AND GRADATION OF 8 BASE SETTING TEMP-- ----------- 60 DEG AGGREGATE BEING UTILIZED FOR THE ABUTMENT.ONLY HAND-OPERATED COMPACTION EQUIPMENT IS ALLOWED WITHIN 3-FEET OF THE WALL FACE. EXTREME EVENT LOADS EQ SITE CLASS ----------------------- C 4. GEOSYNTHETIC REINFORCEMENT PLACEMENT: PULL THE GEOSYNTHETIC PEAK GROUND ACCELERATION(PGA) 0.304 TAUGHT TO REMOVE ANY WRINKLES AND LAY FLAT PRIOR TO PLACING AND ACCELERATION COEFFICIENT SD1 ------- 0.394 COMPACTING THE BACKFILL MATERIAL.SPLICES SHOULD BE STAGGERED AT SEISMIC PERFORMANCE ZONE ------------- 3 LEAST 24-INCHES APART AND SPLICES ARE NOT ALLOWED IN THE BEARING REINFORCEMENT ZONE.NO EQUIPMENT IS ALLOWED DIRECTLY ON THE GEOSYNTHETIC.PLACE A MINIMUM 6-INCH LAYER OF GRANULAR FILL PRIOR Q TO OPERATING ONLY RUBBER-TIRED EQUIPMENT OVER THE GEOSYNTHETIC 5 AT SPEEDS LESS THAN 5 MILES PER HOUR WITH NO SUDDEN BRAKING OR SHARP TURNING. I m 5. GRS WALL FACE ALIGNMENT: CHECK FOR LEVEL ALIGNMENT OF THE BLOCK ROW AT LEAST EVERY OTHER LAYER OF THE GRS ABUTMENT.CORRECT ANY b\ ALIGNMENT DEVIATIONS GREATER THAN 0.25 INCHES. 0 o CV m cV Q o: Q? pF WASy l/► LLI P\\ 0 0 1 NAME OR INITIALS AND DATE GEOGRAPHIC INFORMATION A�^�,\,g Gi 2�� pp,N.Wall Strc t,S,ae 5DO DESIGNED S±—____—____LATITUDE 4Ta5•09"N — TA N E U M CREEK R M 5 BRIDGE S 1 ,rAL EN IF THIS BAR DOES NOT CO F F M A N Spokane,WA 992D1 CHECKED DMS LONGITUDE 1217A7•,D'W GENERAL_ BRIDGE NOTES EN MEASURE 1" THEN ph 509.328.2194 ----- ZONAL ENGINEERS TN/SC/Rc i18N150�R16E D E S I G N n Q DRAWING IS NOT PLOTTED www.00rm,aa.00m pRAy/N pFP ti SHEET TO ORIGINAL SCALE. OF `tJ CHECKED HLC DATE a