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Home My WebLink About16 - Lower Newport Bay Confined Aquatic Disposal Construction Project — Environmental Impact Report - PowerPointMay 25, 2021 Item No. 16 City Council May 25, 2021 Public Works Department • Adopt Resolution No. 2021-46 certifying Environmental Impact Report No. ER2021-001; • Adopt the Mitigation, Monitoring and Reporting Program; • Make facts and findings, and • Approve the construction of a confined aquatic disposal facility and dredging outside the Federal Channels in Lower Newport Harbor. a". 9 Newport Channel -15 M.;. Chap 1 -10 W—k Lido -10 Wert Lido AR 6 -10 -� Bay lsla�d -15 Channel North 40 A Phase II upper [haanel WhL d-tu - Channel South A- 4- Current Dredging Project (April —June 2021) Phase I It— Channrh • 10 ono.:ye iu 10 Eixrs�n<e {han nel -7 • Maintained by the Federal Government (USACE) • With local sponsor (City) contribution Required to evaluate exiting sediment characteristics and disposal alternatives ,/Determined 90% of bottom sediment material is suitable for open ocean placement (nearshore or LA -3) Most sediment �} suitable for nearshore or open -ocean placement Replenishes peninsula ocean beach sand a#111111lilit 10% of bottom sediment material is unsuitable for ocean disposal due to the presence of low- level PCBs and mercury • Per US EPA Policy — sediment material is ok to leave in place in the harbor. Ocean Disposal has different standards governing disposal • Dredging these areas is not feasible without identifying an alternative disposal method As the local project sponsor, the City is responsible for identifying a disposal location on behalf of the USACE. UPPER i' NEWPORT Main Channel _j. BAY North 1 Main Channel Grp LI / North 2 4r f Main Channel 2p: { LINDA ISLE North 3 LIDO f LIDO ISLE PIE INSUI { -,Main Channel 7 Bay Island •, / North 4 North / ;i Newport - r Channell Newport Channel 2 -' f !' '-1S' Newport Channel 3 BALBOA ISLAND y� Bay Island l Middle West Bay Island South LOWER NEWPORT BAY ' -Bay Island Middle -15: � PACIFIC OCEAN East Dredged Material Not Suitable for Open Ocean Disposal Dredged Material Suitable for Open Ocean Disposal Main Channel } North Entrance Channel -r 1,11 ih DA nliti jT . k PhIn 1.) B.1 mil, 0nw C�4�4N�rch 2 I -j Ni&4�oN N�P�rt CPw..mI 3 • -M1 111111 mo Neqth 3 -1a -.n- N.Fth 4 LY U ISLAIW M Wd* Wilt I E -t SW Island - ii ChaRrrdA—'-'-" M�I M&i lZrth Dredged Material Not Suitable for Open Ocean Disposal Dredged Material Suitable for Open Ocean Disposal 8 L LEGEND: Total DDTs (ppb) - {' " 2018 Sediment * Sampling A ® 25.9-46.1 .r" � ,rT•i". ia�f ! O 46.2 - 100 Main Channel '` �- North 3 O 101-152 ® 152.1 - 299 101 Mercury (ppm) — 2009 Sediment Sampling (representing areas not 25.9 dredged in 2012) ay Island 799 0.11 - 0.15 North 435 0 0.151 - 0.71 0 0.711-1.0 299 131.4 1.1 -5.00 �� • z 1 v Bay Island 00.11_ 'Middle East �+ Concentration values in red exceed EPA threshold. j 161.1 j 174.7 tA! U 0.35 0.19 161.1 177.4 00.2 NOTES: �. ®1.28 Horizontal datum: California State Plane Zone 6, NAD83 2.22 265 127.s O0.s6 � Aerial Photo: ESRI 00.23 U s ppm = parts per million or zos.s mg/kg 1.17 O 'o.1z 148.3 ppb = parts per billion or 231.8 µg/kg Bay Island � o.58 Middle West 149.6 Bay Island .0.3, UQo.zB South c, 72C7�.9 =1: 107.8 �` (, A Mercury Test Levels (PPM) South (Si S) �� 10 NC3-03 (0.144) ❑ (0 19) "y (0.19) NC3-01 ❑ (0.245) West Lido NC2-04 ❑ Areca 3 (0.267) O NC -03 1-1(0.291) NC2-02 NC2-03 (1.52) 0 (1.26) NC -02 i NC1-04 (0.46) ❑ NC2-01 (0.81) O (0.402) South (Si S) �� 10 • Planning document building upon previous harbor -wide planning tools • Creates an inventory of the harbor sediment within and outside Federal Channels requiring dredging • Identifies sediment management options, locations and permitting requirements depending on sediment characterization Approximately 450 residential docks may have disposal issues LEGEND: Suitable to -10 feet MLLW plus 2 feet of overdepth for unrestricted disposal at the LA -3 ODMDS. Grain - size required priorto beach replenishment or nearshore placement to demonstrate suitability. DOVER Suitable to -7 feet MLLW plus 1 foot of overdepth SHORES for unrestricted disposal at the LA -3 ODMDS. Z -layer testing to confirm post -dredge surface contains -unemurylessthan 1 ppm priorto dredging to PACIFIC COASTdemonstrate newly exposed surface is clean. Grain HIGHW I AY BRIDGE size required priorto beach replenishment or neamhore placement to demonstrate suitability. DAYsIbE VILLAGE MARINA - Area not included under RGP 54. Material proposed for disposal at LA -3 ODMDS must have chemical testing for mercurywith agency concurrence to verify suitability priorto disposal. Z_ Layer testing is required to confirm post -dredge surface contains mercury less than 1 ppm prior to dredging to demonstrate newly exposed surface is clean. Material proposed for beach replenishment or nearshore placement must also have grain size verification prior to placement Material proposed for disposal at LA -3 ODMDS must have chemical testing for mercury and PCBs with agency concurrence to verify suitability priorto disposal. Z-layertesting is required to confirm Post -dredge surface contains mercury less than1 Firm, and PCBs less than 100 ppb prior to dredging to demonstrate newly exposed surface is clean. Material proposed for beach replenishment or nearshore placement must also have grain size verification prior to placement ——— Suitable to -10 feet MLLW plus 2 feet of overdepth for unrestricted disposal at the LA -3 ODMDS. Material proposed for beach replenishment or nearshore placement must have grain size verification and chemical testing for DDTs with agency concurrence to verify suitability priorto Placement. Z -layer testing is required to confirm post -dredge surface contains DDT concentrations less than 18.0 ppb`. IRCE: Aerial from Bing maps. Coastline extents from City of Newport Beach. UZONTAL DATUM: California State Plane, Zone 6, NAD83. TICAL DATUM: Mean Lower Low Water (MLLW). fE: o 000 is included in RGP 54 are generally between the bulkhead and pierhead lines with the shoreline/boundary demarcated by the various colors/hatched lines. Represents the 95%Upper Confidence colored lines, whether solid or dashed, always follow the shoreline rather than following individual fingers or docks. 0DMDS (Ocean Dredged Material Lim it for surface sediment concentrations Waal shat and nnm tmrtz aer mminnt. within the RGP permit area. • Appropriate and feasible area for sediment that is unsuitable for ocean disposal. •Minimize impacts to the maximum extent practicable. •Try to accommodate small volume of RGP-54 unsuitable sediments and limited areas outside of the Federal Channels. • Promotes beneficial material reuse through beach nourishment 13 Prior Project solution to disposal of unsuitable sediments Port of LA & Long Beach not available 7-7 + _ 1� _ ,k _ her. �_1 � '�� •. v �� F. 4 z } J� F - y A ti - k '. r 7 7F 06 'll st ST Haul Trucks 'W" Treatment System Barge - Ll 49 16 Project Alternative No. 3 and 4 • Reduced Dredging (3) • Smaller CAD • Less dredging unsuitable material • CAD/Upland trucking (4) • Smaller CAD • Remaining volume trucked to permitted landfill likely outside OC region Project Alternative No. 5 In -Harbor Disposal:" \ Alternative CAD ti Locations �N • V ��` �^�"""�Itl.N � !� � � fir , , .. � / � .i! Q' wl•rF !�� \ �. Reviewed �� 'ii Locations adjacent t ��,,y °=- to north and south sides of Lido Isle, g and Turning Basin ay� .r��. - a. � o --fit _ •-1 f Placement Option Proposed Site Alternate Site -•�`li.lo-� fir` '�, +'t,N _ qU '%4 •Centrality located within harbor •Equal proximity to unsuitable material (reduces transit time, disruption and cost) •Deeper water =maximizes scow capacity •Reduces timeline, cost and emissions • Not a known eelgrass area •Area already required to be dredged •Anchorage temporarily relocated to the Turning Basin area (same as 2012). • Material dug from the hole will be reused to renourish Newport's Ocean Beaches or placed at LA -3. • CAD could accommodate up to 156,900 cy of material • 106,900 cy from Federal Channel dredging project • Up to an additional 50,000 cy from RGP-54 Newport Residents/Marinas who are lacking viable disposal options. • No external material (outside of Newport Harbor) will be placed in CAD 1. ExistingConciitions 015P I Smw 2. FederalOannels!)Wging 3. Excavate CAD (Nearshore Disposal) 4. Unsuitable Material Placement S. Interim Cap Placement G. Additional Material Placement and Final Cap SActual scow froM 2012 Proposed dredging Project: =� . Sediment Disposal Site (CAD) •Technical feasibility and details • Design features and construction approach • Outlines permitting strategy Technical Details: 1. Subsurface conditions and soil types 2. Necessary size, dimensions 3. Long-term placement of sediments 4. Stability of adjacent structures 5. Consolidation of material over time 6. Equipment types 7. Numeric modeling: wind/storm waves, vessel wakes, potential propeller wash etc. •Interim cap placed at conclusion of federal project. No activity for 2 -years (allows shoreline resident time to obtain the necessary dredging permits). After 2 -years, Newport residents to place material during 6 month window. • Only Newport Bay material will be laced • Final Cap placed at depth of 22' MLLW or deeper. • New deeper channel plans for future 2012 Dredging Photo of Anchorage Removed while dredging = increased recreation/sailing area • 3/13/20 Harbor Commission • 9/30/19 Local stakeholders • 10/8/19 Local stakeholders • 10/16/19 Local stakeholders • 10/17/19 Local stakeholders • 11/7/19 Water Quality Committee • 10/17/19 Chamber of Commerce • 11/12/19 Dixon Lido Town Hall • 11/13/19 Harbor Commission • 11/14/19 Local stakeholders • 11/15/19 Media article • 11/16/19 Media article • 11/18/19 Media article (1) • 11/18/19 Media article (2) • 11/19/19 City Council Announcement • 11/20/19 SPON • 11/21/19 Media article • 12/4/19 Local stakeholders • 12/4/19 Scoping meeting • 12/5/19 Water Quality CommitteE • 12/13/19 Local stakeholders • 1/31/20 Lido Isle Board Meeting • 2/3/20 Dixon Lido Town Hall • 2/19/20 Yachtsman's Luncheon • 3/11/20 Speak Up Newport • 6/10/20 Harbor Commission • 11/19/20 Juaneno Mission Indians • 1/29/21 Media article • 2/9/21 Media article • 2/10/21 State of the Mayor • 2/12/21 Media article •2/16/21 Media article • 3/9/21 Mayor Announcement •Considers the "whole of the project" • CAD and Federal Channels dredging •The entire environmental record with mitigation measures incorporated into the Mitigation, Monitoring and Reporting Program: Findings: • No project -level impacts, or • Less -than -significant project -level impacts, and • No known significant and unavoidable effects on the environment • AQ -1: Tier 4 engine requirement for tug boats (or Tier 3 compliant) • BIO -1: Pre -construction Coulerpo and eelgrass surveys • BIO -2: Eelgrass mitigation (if required) • CHR -1: Construction stopped or relocated if any non- native artifact, bone, shell found • GEO-1: Post -construction monitoring (geologic, bathymetry and cap coring) • GHG-1: Greenhouse gas credits purchased • HYDRO -1: Water quality monitoring during construction • HYDRO -2: Water quality B M Ps • HYDRO -3: Material placement outside tidal extremes • December 4, 2019: Public Scoping Meeting Initial Study and Notice of Preparation • December 4, 2020: Draft EIR public comment period begins Notice of Availability • January 20, 2021: Draft EIR public comment period ends • April 14, 2021: Harbor Commission review Draft Final EIR Approved Supporting Resolution • May 25, 2021: City Council Consideration to Certify EIR www.newportbeachca.gov/harbordred in • Regulatory Permits (assume EIR certification) • June 2021 to January 2022 (estimate) • California Coastal Commission • U SAC E • Santa Ana Regional Water Quality Control Boa rd • Southern California Dredged Material Management Team • (Federal and state interagency team including EPA) • Funding (estimated $20 million) • December 2021 to February 2022 (estimate) • Federal funding via USACE ($10 million) • City contribution ($10 million) With approval of this environmental document, and incorporation of the CAD into the federal dredging project, the Full Dredging Project can proceed, and thus will: ✓Improve overall Harbor Navigation and remove current depth restrictions for deeper draft vessels ✓Improve Harbor Water Quality / Tidal Flushing leading to long-term enhanced fisheries, wildlife, eelgrass acreage and recreational usage ✓Enhance / replenish peninsula ocean beaches with much-needed sand ✓Provide much-needed assistance to Newport residents with private dredging disposal complications ✓Enhance the Harbor's economic viability as well as increased visitor usage by deeper draft vessels ✓Address Navigational Channel Sediment Issues Now while funding window and regulatory support exist Question and Comments? Your Public Works Department Protecting and Providing Quality Public Improvements and Services www. newportbeachca.gov/harbordredginq