A.01.13 FINAL Plans Craney Island Spillway No. 1 Replacement.pdf

PDF 7 MB Posted Dec 30, 2020

Attached to: Craney Island Dredged Material Management Area (CIDMMA) Spillway #1 Replacement
Solicitation number: W9123621B5014
Issued by: Department of the Army Corps of Engineers Engineering District Norfolk

About this file

Written by GovTribe AI · Dec 28, 2023

This final design package details plans for replacing Spillway #1 at the Craney Island Dredged Material Management Area in Portsmouth, Virginia. The project involves demolishing the existing steel and concrete spillway and constructing a new free-standing steel frame spillbox. Key aspects include partial demolition of the existing spillway while maintaining functionality; installing new 36-inch HDPE outfall pipelines between stations 1+80 and 5+25; constructing a 100-foot by 100-foot reinforced concrete foundation pad and extending the construction area as needed; and placing a 12-inch thick marine mattress at the spillway outlet. The design provides construction details, specifications, general and structural notes, erosion control plans, and other requirements.

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Other files

File	Type	Posted
A.01.25 ABSTRACT OF OFFERORS_Pg2.pdf	PDF	Feb 9, 2021
A.01.25 ABSTRACT OF OFFERORS W9123621B5014 CI Spillbox 1_Pg1.pdf	PDF	Feb 9, 2021
W9123621B5014 Amendment 0002_Spillbox 1.pdf	PDF	Jan 28, 2021
A.01.25_Site Visit Roster_Spillbox1_20210115.pdf	PDF	Jan 20, 2021
21-B-5014 Amendment 1.pdf	PDF	Jan 7, 2021
A.01.13 FINAL Plans Craney Island Spillway No. 1 Replacement_1-5-2021.pdf	PDF	Jan 7, 2021
A.01.13 FINAL Specifications Craney Island Spillway No. 1 Replacement.pdf	PDF	Dec 30, 2020
W9123621B5014 Solicitation.pdf	PDF	Dec 29, 2020

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US Army Corps of Engineers

Norfolk District

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CRANEY ISLAND DREDGE MATERIAL MANAGEMENT AREA

REPLACE SPILLWAY No.1

PORTSMOUTH, VIRGINIA

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Sheet List Table

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Norfolk District

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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AutoCAD SHX Text SIGNATURES AFFIXED BELOW INDICATE OFFICIAL RECOMMENDATION AND APPROVAL OF ALL DRAWINGS IN THIS SET AS INDICATED ON INDEX TO DRAWINGS.

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NORFOLK, VIRGINIA

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DEPARTMENT OF THE ARMY

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NORFOLK DISTRICT, CORPS OF ENGINEERS

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CHIEF, WATER RESOURCES DIVISION

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CHIEF, DESIGN SECTION

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CHIEF, OPERATIONS BRANCH

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APPROVED:

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CHIEF, NAVIGATION SUPPORT AND SURVEY SECTION

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COVER SHEET

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LOCATION MAP

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GENERAL NOTES

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EXCAVATION & BACKFILL OF EXISTING PIPELINE FOR SPILLWAY

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DETAILS FOR EXCAVATION & BACKFILL OF EXISTING SPILLWAY PIPELINE

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DEMOLITION PLAN - EXISTING SPILLWAY STRUCTURE

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DEMOLITION PLAN - EXISTING SPILLWAY STRUCTURE (CONT'D)

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AutoCAD SHX Text INSTALLATION OF PROPOSED SPILLWAY No.1

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PERIMETER ROAD OVER PROPOSED OUTFALL PIPES

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EROSION AND SEDIMENTATION CONTROL PLAN

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PERIMETER ROAD DETAILS & EC NOTES

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OUTFALL PIPE PROFILES

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DISCHARGE PIPE EXCAVATION AND FILL DETAILS

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SPILLWAY FOUNDATION & ACCESS ROAD DETAIL

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MARINE MATTRESS DETAIL

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MARINE MATTRESS DETAIL (CONT'D)

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PLANTING PLAN

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REFERENCE WETLAND CONDITIONS

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IMPACT AREA LOCATION AND CREATION SITE

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PLANTING PLAN

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VEGETATION SCHEDULE AND HABITAT VALUE ENHANCEMENTS PLAN

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SD001

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PLAN & ELEVATIONS

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SECTIONS & DETAILS

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GRATING PLAN & MISC DETAILS

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EXISTING SPILLBOX (REFERENCE ONLY)

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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%%ULOCATION MAP

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US HWY 13

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CHESAPEAKE BAY

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ATLANTIC OCEAN

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(HWY 13)

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VIRGINIA

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NORTH CAROLINA

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SCALE IN MILES

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EXISTING

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MAJOR CONTOUR

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PERIMETER ROAD

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LIMITS OF CONSTRUCTION

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FEDERAL NAVIGATION CHANNEL

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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BENCHMARKS

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ELEVATIONS

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BENCHMARKS

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AutoCAD SHX Text Elevations are relative to NOS MLLW, 1983-2001 NTDE

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CE "AR-2 RESET, 1975"

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2.58' RANGE

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DATUM DIAGRAM CRANEY ISLAND 1983-2001 NTDE (SCALE 1"-1')

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NOS MLLW, 1983-2001 TIDAL EPOCH

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PREVIOUS USED NOS MLLW, 1960-1978 TIDAL EPOCH

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NOS MLW, 1983-2001 TIDAL EPOCH

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NOS MHW, 1983-2001 TIDAL EPOCH

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NAVD 88

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- NOTES -

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CE "NICO, 1993"

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"REHANDLING, 2015" OPUS

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1. THE COORDINATES ARE IN FEET AND REFERRED TO THE VIRGINIA GRID (SOUTH ZONE). THE COORDINATES ARE IN FEET AND REFERRED TO THE VIRGINIA GRID (SOUTH ZONE). 2. PROJECT BENCH MARK IS BRASS DISK SET FLUSH WITH GROUND ON THE SOUTH SIDE OF THE ASPHALT PROJECT BENCH MARK IS BRASS DISK SET FLUSH WITH GROUND ON THE SOUTH SIDE OF THE ASPHALT ROAD AT SOUTHWEST CORNER OF CRANEY ISLAND AND IS DESIGNATED AS C.E. "AR-2", ELEV. = 17.01 FEET ABOVE NATIONAL OCEAN SERVICE, MEAN LOWER LOW WATER, (NOS MLLW) 1983-2001 NTDE. 3. EXCESS EXCAVATED MATERIAL SHALL BE DISPOSED OF WITHIN THE CRANEY ISLAND DISPOSAL AREA AT A EXCESS EXCAVATED MATERIAL SHALL BE DISPOSED OF WITHIN THE CRANEY ISLAND DISPOSAL AREA AT A LOCATION AS DIRECTED BY THE CONTRACTING OFFICER. 4. BORROW MATERIALS OTHER THAN STONE AND GRAVEL SHALL COME FROM CRANEY ISLAND FACILITY AS BORROW MATERIALS OTHER THAN STONE AND GRAVEL SHALL COME FROM CRANEY ISLAND FACILITY AS DIRECTED BY THE CONTRACTING OFFICER. IMPERVIOUS FILL AND SELECT FILL SHALL BE EXCAVATED FROM BORROW AREA. BORROWING LOCATION SHALL BE COORDINATED WITH THE FACILITY MANAGER. IF ADEQUATE QUANTITIES OF APPROVED BORROW MATERIALS CANNOT BE LOCATED ON-SITE, MIXING OF ON-SITE SOILS OR MIXING OF ON-SITE SOILS OR CHEMICAL MODIFICATION MAY BE REQUIRED TO MEET MINIMUM SOIL REQUIREMENTS AS DESCRIBED IN THE PROJECT SPECIFICATIONS. . 5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR WIDENING OF THE EXISTING CONSTRUCTION PAD TO THE THE CONTRACTOR SHALL BE RESPONSIBLE FOR WIDENING OF THE EXISTING CONSTRUCTION PAD TO THE LIMITS SHOWN ON SHEET 11. 6. THE WATER TABLE WITHIN THE DISPOSAL AREA VARIES DEPENDING ON THE TIME OF THE SEASON, THE WATER TABLE WITHIN THE DISPOSAL AREA VARIES DEPENDING ON THE TIME OF THE SEASON, PRECIPITATION AND AMOUNT OF DREDGE MATERIAL BEING PUMPED INTO THE DISPOSAL AREA. DUE TO A 5 TO 6 FEET DROP IN DISPOSAL AREA SURFACE ELEVATION FROM EAST TO WEST, PONDING OF WATER TO DEPTHS OF 0.5 TO 3.0 FEET AT THE WEST DIKE CAN OCCUR DUE TO EXCESS PRECIPITATION. DREDGE MATERIAL PUMPING OPERATIONS CAN ALSO CAUSE SIMILAR "PONDING" CONDITIONS. NORMALLY, DURING THE DISPOSAL AREA'S INACTIVE PERIOD, THE WATER TABLE DEPTH RANGES FROM 0.5 TO 6 FEET BELOW THE DREDGE MATERIAL SURFACE. DEWATERING WILL BE REQUIRED AND SHALL BE THE RESPONSIBILITY DEWATERING WILL BE REQUIRED AND SHALL BE THE RESPONSIBILITY SOLELY OF THE CONTRACTOR. . 7. ALL FEATURES THAT MAY HAVE BEEN BUILT BY THE CONTRACTOR TO FACILITATE THE CONSTRUCTION OF A ALL FEATURES THAT MAY HAVE BEEN BUILT BY THE CONTRACTOR TO FACILITATE THE CONSTRUCTION OF A NEW SPILLWAY BUT NOT INDICATED ON THE CONTRACT DRAWINGS, INCLUDING TEMPORARY EARTH BERMS AND STOCKPILES OF MATERIAL, SHALL BE REMOVED BY THE CONTRACTOR PRIOR TO COMPLETION OF THE PROJECT. 8. ANY MOUNDING OF MATERIAL AROUND THE NEW SPILLWAY DUE TO THE MUDWAVE EFFECT SHALL BE ANY MOUNDING OF MATERIAL AROUND THE NEW SPILLWAY DUE TO THE MUDWAVE EFFECT SHALL BE REMOVED BY THE CONTRACTOR AFTER COMPLETING THE CONSTRUCTION OF SPILLWAY BY CUTTING A 60-FT WIDE CHANNEL TO ALLOW WATER FLOW TOWARDS THE NEW SPILLWAY. 9. WHERE NEW 36" PIPES CROSS EXISTING ROAD AND THEIR ELEVATION REQUIRES IT, A MINIMUM 3.0 FEET OF WHERE NEW 36" PIPES CROSS EXISTING ROAD AND THEIR ELEVATION REQUIRES IT, A MINIMUM 3.0 FEET OF COVER OF EARTH AND 8 INCHES OF CRUSHED STONE SHALL BE PROVIDED FOR ROAD OVER PIPES. THE RAMP GRADES SHALL NOT EXCEED 2.0% AND THE WIDTH SHALL MATCH THE EXISTING ROAD. IF NECESSARY, A TEMPORARY ROAD CAN BE BUILT. 10. THE CONTRACTOR SHALL COORDINATE OPEN EXCAVATIONS WITHIN THE VICINITY OF THE ROAD WITH THE THE CONTRACTOR SHALL COORDINATE OPEN EXCAVATIONS WITHIN THE VICINITY OF THE ROAD WITH THE CONTRACTING OFFICER, AND SHALL BACKFILL AS SOON AS PRACTICAL. 11. THERE WILL BE A GOVERNMENT LED SITE VISIT DURING THE SOLICITATION PERIOD AND, PRIOR TO THERE WILL BE A GOVERNMENT LED SITE VISIT DURING THE SOLICITATION PERIOD AND, PRIOR TO SUBMITTING A BID, ALL THE CONTRACTORS ARE REQUIRED TO ATTEND IT TO BECOME AWARE OF ACTUAL SITE CONDITIONS. TO ARRANGE A SITE VISIT OUTSIDE OF GOVERNMENT LED VISIT, CALL CRANEY ISLAND DURING NORMAL BUSINESS HOURS AT (757) 484-1021. 12. CRANEY ISLAND IS DIVIDED INTO THREE SUBCONTAINMENT AREAS WITH TWO SPILLWAYES PER CRANEY ISLAND IS DIVIDED INTO THREE SUBCONTAINMENT AREAS WITH TWO SPILLWAYES PER SUBCONTAINMENT AREA. 13. CONTRACTOR SHALL COORDINATE ALL WORK WITH OTHER CONTRACTORS' ONGOING WORK AT THE CRANEY CONTRACTOR SHALL COORDINATE ALL WORK WITH OTHER CONTRACTORS' ONGOING WORK AT THE CRANEY ISLAND FACILITY. 14. UNSATISFACTORY MATERIALS MAY BE MIXED AND BLENDED BY THE CONTRACTOR SUCH THAT THE RESULTANT UNSATISFACTORY MATERIALS MAY BE MIXED AND BLENDED BY THE CONTRACTOR SUCH THAT THE RESULTANT MIXTURE MEETS ALL REQUIREMENTS FOR A SPECIFIC BACKFILL MATERIAL IN ACCORDANCE WITH THE PROJECT SPECIFICATIONS. SOIL MIXTURES WILL BE SUBJECT TO ALL SOIL LABORATORY TESTING REQUIREMENTS IN ACCORDANCE WITH THE PROJECT SPECIFICATIONS. 15. DEMOLITION OF THE EXISTING SPILLWAY #1 SHALL NOT BEGIN UNTIL THE NEW SPILLWAY #1 IS FULLY DEMOLITION OF THE EXISTING SPILLWAY #1 SHALL NOT BEGIN UNTIL THE NEW SPILLWAY #1 IS FULLY OPERATIONAL. 16. THE TOTAL DISTURBED AREA FOR CONSTRUCTION OF THE NEW SPILLWAY #1 IS 6.78 ACRES.THE TOTAL DISTURBED AREA FOR CONSTRUCTION OF THE NEW SPILLWAY #1 IS 6.78 ACRES.

AutoCAD SHX Text FEDERAL PROJECT: Construct a new SPILLWAY #1 as shown on plans and partially demolishing the existing SPILLWAY. MEAN LOWER LOW WATER, 1983-2001 National Tidal Datum Epoch, was determined by using the National Ocean Service (NOS) VDATUM program, based on USACE digital leveling of the NAVD88 elevation established on CE"AR-2 Reset, 1975", CE "NICO 1993" and CE "REHANDLING, 2015", near the bulkhead at the Craney Island Rehandling Basin, Hampton Roads Va. The NAVD88 to NOS MLLW 83-01 separation values are shown to be the 0.01' different between all 3 sites. North American Vertical Datum of 1988, was determined by USACE digital leveling from City of Portsmouth BM " 166" off Craney Island to CE" AR-2 Reset,1975" then to CE "REHANDLING, 2015" near the bulkhead at Craney Island Dredged Material Management Area. MEAN RANGE OF TIDE is 2.58 feet at Craney Island Bulkhead, Hampton Roads Va, based on NOS VDATUM Program. TOPOGRAPHIC SURVEY are in feet referred to NOS MLLW and were MLLW and were and were taken on October 22, 2019 through November 15, 2019. October 22, 2019 through November 15, 2019. COORDINATES are referred to the Virginia State Plane Coordinate Virginia State Plane Coordinate System, South Zone, in U.S. survey feet, and are based on the and are based on the North American Datum of 1983.

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SPILLWAY

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BEGINNING OF PIPE

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STATION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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DESCRIPTION

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15 MAY 2020

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AutoCAD SHX Text H.A.F.

H.A.F./A.G.

Norfolk District

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SPILL BOX 1

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SCALE IN FEET

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EXISTING SURFACE

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LF EDGE

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RT EDGE

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SCALE IN FEET

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SCALE IN FEET

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HORIZONTAL SCALE

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VERTICAL SCALE

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EXISTING (4) - 36" CMP

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AVERAGE ELEVATION OF SPILLWAY 44.9'

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ACTUAL INVERT ELEVATION UNKNOWN

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SEC 1

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SEC 2

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STA: 0+90.3

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STA: 2+15.0

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STA: 3+67.9

AutoCAD SHX Text Edge of Road and Ramp

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RE-ESTABLISH THE SHORELINE. SEE DETAIL 1 ON SHEET 6.

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RE-ESTABLISH PERIMETER ROAD. SEE DETAIL 3 ON SHEET 6.

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APPROX. LOCATION LOCATION APPROY. OF EXISTING RIP-RAPOF EXISTING RIP-RAP

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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SUBMITTED:

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DATE

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DESCRIPTION

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15 MAY 2020

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AutoCAD SHX Text H.A.F.

AutoCAD SHX Text H.A.F./A.G.

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EXISTING SPILLWAY #1

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FILL IN DITCH. MAKE SMOOTH TRANSITION INTO EXISTING SURFACE

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PERIMETER ROAD

AutoCAD SHX Text NOTE: SHOWN CONTOURS AND ELEVATION MAY NOT REFLECT THE ACTUAL SITE CONDITIONS DUE TO ONGOING DIKE RAISING WORK. THE CONTRACTOR SHALL FOLLOW EM385-1-1 "SAFETY AND HEALTH REQUIREMENTS" FOR EXCAVATION AND TRENCH SLOPES. THE CONTRACTOR SHALL BE SOLELY RESPONSIBLE FOR DESIGN OF ALL EXCAVATION STABILITY IN ACCORDANCE WITH EM385-1-1, HOWEVER, EXCAVATION SLOPES SHALL BE NO STEEPER THAN 4:1.

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AutoCAD SHX Text NOTE: REMOVAL BY EXCAVATION, ABANDONMENT IN PLACE VIA GROUTING, OR COMBINATION THEREOF, MAY BE UTILIZED FOR DEMOLITION OF THE EXISTING CORRUGATED METAL PIPES. REMOVAL BY EXCAVATION SHALL BE COMPLETED IN ACCORDANCE WITH THE PROJECT PLANS AND SPECIFICATIONS. PRIOR TO ABANDONMENT IN PLACE VIA GROUTING, THE CONTACTOR SHALL SUBMIT A GROUTING PLAN TO THE COR. THE GROUTING PLAN SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION 02 41 00, PARAGRAPH 1.4.1.

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SILT FENCE

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AutoCAD SHX Text IF IT IS THE CONTRACTOR'S OPTION TO REMOVE THE EXISTING PIPES, SOIL STABILIZATION MATTING WILL BE PLACED ON THE DIKE'S EXTERIOR AFTER BACKFILLING THE TRENCH. ALSO THE TRENCHING WILL BE PROTECTED FROM EROSION IN THE SAME MANNER AS THE INSTALLATION OF THE NEW PIPES. SEE SHEET 13 FOR CLARIFICATION.

AutoCAD SHX Text 4 -36" CMP PIPES TO BE REMOVED OR PERMANENTLY ABANDONED IN PLACE AT CONTRACTORS DISCRETION.

AutoCAD SHX Text AVERAGE LENGTH OF EXISTING 36" CMP PIPES TO BE REMOVED AND BACKFILLED OR PERMANENTLY ABANDONED IN PLACE AT CONTRACTORS DISCRETION.

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INSTALL SOIL STABILIZATION MATTING BETWEEN THE SHORELINE AND THE PERIMETER ROAD.

IF IT IS THE CONTRACTOR'S OPTION TO ABANDONED THE EXISTING PIPES IN PLACE, THE SECTION OF PIPE BETWEEN THE END OF PIPES AND THE EDGE OF ROAD WILL BE REMOVED AND CAPPED. SOIL STABILIZATION MATTING WILL BE PLACED IN THIS AREA AFTER BACKFILLING THE TRENCH.

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COMPACTED 8" STONE BASE COURSE VDOT 21A

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COMPACTED FILL

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GRAVEL SURFACE FOR PERIMETER ROAD

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NOT TO SCALE

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COMPACTED 8" STONE BASE COURSE VDOT 21A

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COMPACTED FILL

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GRAVEL SURFACE FOR PERIMETER ROAD

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NOT TO SCALE

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LF EDGE

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PERIMETER ROAD

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GEOTEXTILE IN ACCORDANCE WITH SPEC SECTION 31 05 22, TABLE 1

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6" OF VDOT #3 STONE

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SEE NOTES 1 AND 2 ON THIS SHEET

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AVERAGE INV. 4.5'

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EXISTING SURFACE

AutoCAD SHX Text EXISTING 36" CMP PIPES TO BE REMOVED OR PERMANENTLY ABANDONED IN PLACE AT CONTRACTOR'S DISCRETION.

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3' THICKNESS VDOT CLASS II ARMOR STONE

AutoCAD SHX Text NOTES: 1. GEOTEXTILE IN ACCORDANCE WITH SPEC SECTION 31 05 22, TABLE 1GEOTEXTILE IN ACCORDANCE WITH SPEC SECTION 31 05 22, TABLE 1

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#3 VDOT STONE

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#3 VDOT STONE IN ANCHOR TRENCH

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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SUBMITTED:

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APP.

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DATE

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DESCRIPTION

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15 MAY 2020

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AutoCAD SHX Text H.A.F./A.G.

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1. INSTALL VDOT CLASS II RIPRAP TO THE LIMITS SHOWN. REUSE THE INSTALL VDOT CLASS II RIPRAP TO THE LIMITS SHOWN. REUSE THE EXISTING RIPRAP AS AVAILABLE. 2. THE WIDTH OF RE-ESTABLISHED RIPRAP APRON SHALL EXTEND TO THE THE WIDTH OF RE-ESTABLISHED RIPRAP APRON SHALL EXTEND TO THE LIMITS OF EXCAVATION REQUIRED FOR REMOVAL OF THE IN-PLACE SPILLWAY PIPES AND, AT MINIMUM, SHALL NOT BE LESS THAN THE WIDTH OF THE EXISTING RIP RAP APRON (APPROXIMATELY 30 FEET). 3. RECONSTRUCT ROAD ONLY WHERE EXCAVATION FOR REMOVAL OF PIPE HAS RECONSTRUCT ROAD ONLY WHERE EXCAVATION FOR REMOVAL OF PIPE HAS DISTURBED THE ROAD SURFACE. RE-ESTABLISH ROAD LIMITS AND GRADES TO MATCH PRE-CONSTRUCTION CONDITIONS. 4. IF THE PIPES ARE PERMANENTLY ABANDONED IN PLACE, THERE MUST BE A IF THE PIPES ARE PERMANENTLY ABANDONED IN PLACE, THERE MUST BE A MINIMUM OF THREE FEET OF VDOT CLASS II RIPRAP COVER OVER THE PIPE AND END PLUG WHILE MAINTAINING THE LIMITS SHOWN IN DETAIL 1. THIS MAY REQUIRE PARTIAL REMOVAL OF THE PIPES AT THE OUTLET.

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BEACH SIDE

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DIKE SIDE

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PERIMETER ROAD DETAIL

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SCALE:

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SHORELINE RESTORATION AFTER PIPE REMOVAL

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SCALE:

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VARIES, SEE NOTE 3

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SCALE: 1" = 2'

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FABRIC ANCHOR DETAIL (OVER EXISTING SURFACE)

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GRAPHIC SCALE

SCALE:

1/4" = 1' - 0"

GRAPHIC SCALE

SCALE:

0 8'

1/8" = 1' - 0"

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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SUBMITTED:

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APP.

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DATE

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15 MAY 2020

AutoCAD SHX Text A.T.B.

AutoCAD SHX Text H.A.F.

AutoCAD SHX Text H.A.F./A.G.

AutoCAD SHX Text REMOVE BOLTED-ON GRATED STEEL WALKWAYS (3 LEVELS AND LADDERS); PLACE WOOD WEIR BOARD IN FRONT FRAMES TO TOP OF STEEL AND THEN ADD FILL UP TO TOP OF STEEL WITH AVAILABLE IMPERVIOUS ON-SITE MATERIAL.

AutoCAD SHX Text CLEAN ALL DEBRIS AND LOOSE MATERIAL FROM STEM WALL PENETRATIONS, AND TRIM CMP FLUSH TO CONCRETE AT BACK OF STEM. FORM AROUND OPENINGS AS SHOWN AND FILL WITH SELF CONSOLIDATING CONCRETE IN ACCORDANCE WITH SPECIFICATION REQUIREMENTS. ROD AND VIBRATE TO ENSURE MAXIMUM FILL AND CLOSURE OF OPENINGS

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DIKE FACE ELEVATION VIEW OF EXISTING SPILLWAY #1

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SCALE: NOT TO SCALE

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SIDE ELEVATION VIEW OF EXISTING SPILLWAY #1

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SCALE: AS SHOWN

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EXTERIOR DIKE

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1. SHEET SD101 DEPICT THE ORIGINAL CONSTRUCTION OF THE EXISTING SPILLWAY 1 IN 2004, AND ARE INCLUDED FOR REFERENCE ONLY IN ORDER TO CLARIFY PARTIAL DEMOLITION REQUIREMENTS. EXISTING SPILLWAY SHALL BE PARTIALLY DEMOLISHED, FILLED, AND ABANDONED IN PLACE IN ACCORDANCE WITH THESE NOTES. IT SHALL BE NOTED THAT THE STRUCTURE SHOWN ON SHEET SD-101 WAS RAISED BY APPROXIMATELY 12 FEET IN THE PAST BY ADDING TWO 6-FT EXTENSIONS AND NOW IS APPROXIMATELY 33-34' TALL. 2. IF CMPS ARE NOT PERMANENTLY ABANDONED IN PLACE, REMOVE ALL EXISTING CMP IF CMPS ARE NOT PERMANENTLY ABANDONED IN PLACE, REMOVE ALL EXISTING CMP REMOVE ALL EXISTING CMP FROM REAR FACE OF SPILLWAY STEM WALL TO OUTFALL. REMOVE ALL HANDRAILS AND WALKWAY GRATINGS. REMOVE ALL LADDERS. 3. FORM AND FILL CMP OPENINGS THROUGH STEM WALL WITH SELF CONSOLIDATING FORM AND FILL CMP OPENINGS THROUGH STEM WALL WITH SELF CONSOLIDATING CONCRETE IN ACCORDANCE WITH SPECIFICATIONS. FILL INTERIOR OF SPILLWAY WITH IMPERVIOUS FILL TO AN ELEVATION LEVEL WITH TOP OF STEEL AND WEIR BOARDS. ALL FILL TO BE IN ACCORDANCE WITH SPECIFICATION SECTION 31 00 01. 4. WHEN BACKFILLING THE SPILLWAY, PLACE THE FIRST 12 FEET OF MATERIAL AND THEN WHEN BACKFILLING THE SPILLWAY, PLACE THE FIRST 12 FEET OF MATERIAL AND THEN COMPACT EACH ONE FOOT LIFT (LOOSE THICKNESS) WITH A COMPACTOR UNTIL ACHIEVING FINAL GRADE. 5. THE CONTRACTOR SHALL FOLLOW EM 385-1-1 "SAFETY AND HEALTH REQUIREMENTS" THE CONTRACTOR SHALL FOLLOW EM 385-1-1 "SAFETY AND HEALTH REQUIREMENTS" FOR EXCAVATION AND TRENCH SLOPES. THE CONTRACTOR SHALL BE SOLELY THE CONTRACTOR SHALL BE SOLELY RESPONSIBLE FOR DESIGN OF ALL EXCAVATION STABILITY IN ACCORDANCE WITH EM385-1-1, HOWEVER, EXCAVATION SLOPES SHALL BE NO STEEPER THAN 4:1." 6. THE EXISTING IN-SITU MATERIAL (SOFT DREDGE SPOILS) SHALL BE EXCAVATED AWAY THE EXISTING IN-SITU MATERIAL (SOFT DREDGE SPOILS) SHALL BE EXCAVATED AWAY FROM THE FACE OF SPILLWAY PRIOR TO BEGINNING OF EXCAVATION FOR PIPE REMOVAL ON THE BACK SIDE OF SPILLWAY. 7. WHEN BACKFILLING THE EXCAVATION, MAINTAIN A MAXIMUM OF 6' OF DIFFERENTIAL WHEN BACKFILLING THE EXCAVATION, MAINTAIN A MAXIMUM OF 6' OF DIFFERENTIAL SOIL HEIGHT ON EITHER SIDE OF THE SPILLWAY. 8. DEMOLITION OF THE EXISTING SPILLWAY #1 SHALL NOT BEGIN UNTIL THE NEW DEMOLITION OF THE EXISTING SPILLWAY #1 SHALL NOT BEGIN UNTIL THE NEW SPILLBOX #1 IS OPERATIONAL

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STRUCTURAL DEMOLITION NOTES

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12" MIN TYP.

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36" PIPE OPENINGS IN CONCRETE WALL (4) - FILL OPENINGS WITH CONCRETE.

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VARIES

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VARIES

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ELEV. 41.2'

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BACKFILL WITH IMPERVIOUS MATERIAL, SEE NOTE 3 ON THIS SHEET

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APPROXIMATE EXISTING SURFACE. ACTUAL CONDITIONS MAY VARY.

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IN-SITU DREDGE SPOILS DURING DEMOLITION. SEE NOTES 5 AND 6 ON THIS SHEET

AutoCAD SHX Text FINISHED SURFACE. BACKFILL WITH IMPERVIOUS FILL TO TOP OF THE STRUCTURE AFTER COMPLETION OF DEMOLITION

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EXISTING SPILLWAY STRUCTURE, SEE NOTE 1 ON THIS SHEET

AutoCAD SHX Text 4 -36" CMP PIPES TO BE REMOVED AND EXCAVATION BACKFILLED IF NOT ABANDONED IN PLACE.

AutoCAD SHX Text 12" min

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12' MAX

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10' MIN

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APPROXIMATE WATER LEVEL

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10' MIN

A SMALL SOIL BARRIER SHOULD BE CONSTRUCTED TO MINIMIZE WATER FLOW INTO THE SPILLWAY DURING DEMOLITION PHASE

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UNDISTURBED EARTH

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COMPACTED SELECT FILL

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DISCHARGE PIPE SELECT FILL SECTION SECTION 1

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DISCHARGE PIPE IMPERVIOUS FILL SECTION SECTION 2

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C OF PIPES REMOVED

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FOR EXCAVATION AND SLOPE REQUIREMENTS SEE NOTES 2 AND 3

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FOR EXCAVATION AND SLOPE REQUIREMENTS SEE NOTES 2 AND 3

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DISCHARGE PIPE SELECT FILL SECTION SECTION 1

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DISCHARGE PIPE IMPERVIOUS FILL SECTION SECTION 2

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FOR EXCAVATION AND SLOPE REQUIREMENTS SEE NOTES 2 AND 3

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FOR EXCAVATION AND SLOPE REQUIREMENTS SEE NOTES 2 AND 3

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VARIES

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SHEET

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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SUBMITTED:

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DESCRIPTION

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15 MAY 2020

AutoCAD SHX Text A.T.B.

AutoCAD SHX Text H.A.F.

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1. PARTIAL DEMOLITION OF EXISTING SPILLWAY SHALL NOT COMMENCE UNTIL AFTER THE PARTIAL DEMOLITION OF EXISTING SPILLWAY SHALL NOT COMMENCE UNTIL AFTER THE NEW SPILLWAY IS FULLY FUNCTIONAL AND HAS BEEN APPROVED AND ACCEPTED BY THE GOVERNMENT. 2. BACKFILLING AND COMPACTION SHALL BE COMPLETED IN ACCORDANCE WITH SECTION BACKFILLING AND COMPACTION SHALL BE COMPLETED IN ACCORDANCE WITH SECTION 31 00 02 OF THE CONTRACT SPECIFICATIONS. 3. THE CONTRACTOR SHALL FOLLOW EM 385-1-1 "SAFETY AND HEALTH REQUIREMENTS" THE CONTRACTOR SHALL FOLLOW EM 385-1-1 "SAFETY AND HEALTH REQUIREMENTS" FOR EXCAVATION AND TRENCH SLOPES. 4. AT CONTRACTOR'S OPTION, SHEETING AND SHORING FOR EXCAVATION SUPPORT MAY BE AT CONTRACTOR'S OPTION, SHEETING AND SHORING FOR EXCAVATION SUPPORT MAY BE UTILIZED. IF SHEETING AND SHORING IS USED, THE CONTRACTOR IS SOLELY RESPONSIBLE FOR DESIGNING AND CONSTRUCTING A STABLE, TEMPORARY EXCAVATION. REFER TO SECTIONS 31 00 01 AND 31 00 02 OF CONTRACT SPECIFICATIONS. 5. SEE REFERENCE SHEETS 20 & 21 FOR EXISTING SPILLWAY DETAILS. SEE REFERENCE SHEETS 20 & 21 FOR EXISTING SPILLWAY DETAILS. 6. THE CONTRACTOR MAY REUSE THE EXCAVATED MATERIAL AS BACKFILL MATERIAL IN THE CONTRACTOR MAY REUSE THE EXCAVATED MATERIAL AS BACKFILL MATERIAL IN APPROPRIATE DIKE SECTIONS IF THE EXCAVATED MATERIAL COMPLIES WITH THE PROJECT REQUIREMENTS FOR BACKFILL MATERIAL IN ACCORDANCE WITH SPECIFICATIONS SECTION 31 00 02 HOWEVER, IT SHOULD BE NOTED THAT THE CONTRACTOR SHALL BE EXPECTING TO OBTAIN THE IMPERVIOUS FILL MATERIAL FOR BACKFILLING FROM OTHER GOVERNMENT FURNISHED BORROW AREAS AS THE EXCAVATED SOIL IS NOT LIKELY TO MEET THE PROJECT REQUIREMENTS FOR IMPERVIOUS FILL.

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INSTALLATION OF PROPOSED SPILLWAY No.1

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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H.A.F./A.G.

Norfolk District

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SOUTH CELL

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PERIMETER ROAD

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DIKE CREST

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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AutoCAD SHX Text H.A.F./A.G.

NOTE: 1. SHOWN CONTOURS MAY NOT REFLECT THE ACTUAL SITE CONDITION DUE TO ONGOING SHOWN CONTOURS MAY NOT REFLECT THE ACTUAL SITE CONDITION DUE TO ONGOING DIKE RAISING WORK.

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AutoCAD SHX Text N 3493287.52 E 12101318.47

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AutoCAD SHX Text N 3493239.52 E 12100812.11

AutoCAD SHX Text N 3493335.52 E 12100814.37

AutoCAD SHX Text N 3493355.52 E 12100794.37

AutoCAD SHX Text N 3493219.65 E 12100792.06

AutoCAD SHX Text N 3493287.52 E 12100718.47

AutoCAD SHX Text N 3493287.52 E 12100761.44

AutoCAD SHX Text N 3493287.52 E 12100743.47

AutoCAD SHX Text N 3493257.52 E 12101148.43

AutoCAD SHX Text N 3493257.52 E 12101088.43

AutoCAD SHX Text N 3493317.52 E 12101088.50

AutoCAD SHX Text N 3493317.52 E 12101148.50

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SCALE IN FEET

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LF EDGE

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INV.=30.50

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STA: 7+76.90

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BACKFILL TO APPROX. EXISTING GROUND ELEVATION

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INV.=7.50'

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STA: 1+80.0

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60FT

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100FT

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HORIZONTAL SCALE

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VERTICAL SCALE

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SEE SHEET 15 FOR OUTFALL PIPE DETAILS

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STA: 3+40.0 END SEC 1 BEG SEC 2

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STA: 5+25.0 END SEC 2 BEG SEC 3

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NEW SURFACE

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CREST

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LF EDGE

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RT EDGE

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ELEV. 42FT

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35.FT

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MINIMUM EXCAVATION LIMITS. SEE SHEET 17.

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MAINTAIN MINIMUM 3' COVER OVER PIPES

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20FT

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3 FT MINIMUM COVER

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COMPACTED FILL

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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15 MAY 2020

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STONE MATTRESS TOPPED BY RIPRAP SEE SHEET 15 FOR OUTLET STRUCTURE DETAIL.

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EXCAVATE CHANNEL TO ALLOW FLOW TOWARDS SPILLWAY

AutoCAD SHX Text NOTE: SHOWN CONTOURS AND ELEVATION MAY NOT REFLECT THE ACTUAL SITE CONDITIONS. TOPOGRAPHIC SURVEY WAS TAKEN ON OCTOBER 22, 2019 THROUGH NOVEMBER 15, 2019. SURVEY OF THE CONSTRUCTION PAD AREA WAS TAKEN IN NOVEMBER 2020.

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AutoCAD SHX Text EXCAVATION LIMITS FOR REINFORCED FOUNDATION PAD (100'X100'). CONSTRUCTION PAD TO BE A MINIMUM OF (120'X120').

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AutoCAD SHX Text NOTE: EXCAVATION AND INSTALLATION OF THE PIPES IN THE TRENCH WILL LIKELY REQUIRE DEWATERING SYSTEMS TO CONTROL WATER LEVELS AND PACKED COARSE SAND OR STONE ON THE EXCAVATION BOTTOM AND SIDE SLOPES FOR STABILITY AND DRAINAGE. IF COARSE SAND OR STONE IS USED FOR EXCAVATION STABILITY, IT MUST BE REMOVED IN FULL DURING BACKFILLING OPERATIONS BETWEEN STATIONS 3+40 AND 5+25. THE EXCAVATION BOTTOM WILL MOST LIKELY NEED TO BE CROWNED TO PROVIDE POSITIVE DRAINAGE AND A MORE STABLE WORKING SURFACE. AT THE CONTRACTOR'S DISCRETION, PIPE TRENCHING AND INSTALLATION CAN BE COMPLETED IN PHASES WITH NO MORE THAN TWO MECHANICAL JOINTS ALONG EACH PIPE PROFILE. IF A PHASED APPROACH IS UTILIZED, THE EXCAVATION PLAN AND ASSOCIATED MECHANICAL JOINTS MUST BE SUBMITTED TO AND APPROVED BY THE COR PRIOR TO CONSTRUCTION. CONTRACTOR TO WIDEN PAD AND ACCESS ROAD AS NECESSARY.

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MATCHLINE

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SHEET 12

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SHEET 11

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MATCHLINE

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SHEET 11

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US Army Corps of Engineers

Norfolk District

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PERIMETER ROAD

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PERIMETER ROAD PROPOSED SURFACE

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EXISTING SURFACE

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COMPACTED SELECT BACKFILL ABOVE OUTFALL PIPES.

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MAKE SMOOTH TRANSITION INTO EXISTING SURFACE

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MAKE SMOOTH TRANSITION INTO EXISTING SURFACE

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NEW 36" HDPE PIPE INV. 10.75'

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MINIMUM 3.0FT FEET COVER

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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SUBMITTED:

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DESIGNED:

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15 MAY 2020

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PERIMETER ROAD

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BEGINNING OF GRADING FOR PERIMETER ROAD

END OF GRADING FOR PERIMETER ROAD

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SCALE IN FEET

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CHANNEL WITH CHECK DAM

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SHEET

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AS SHOWN

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NORFOLK DISTRICT

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NORFOLK, VIRGINIA

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CORPS OF ENGINEERS

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NORFOLK DISTRICT FILE NO.:

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DESCRIPTION

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CRA.2019-11-15.PS

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JOSEPH MOORE

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CHECKED:

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DESCRIPTION

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15 MAY 2020

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START EROSION AND SEDIMENT CONTROLS AT STA: 5+10.

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TEMPORARY SEDIMENT TRAP 25'X30'X10' SEE DETAIL K.

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FILTER CLOTH

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SOURCE: VA. DSWC

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PLATE 3.17-1

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(KEY IN CLOTH)

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TEMPORARY SEDIMENT TRAP

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CROSS SECTION OF OUTLET

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OUTLET…

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File details come from the government source that posted it. Updated Dec 30, 2020.