DEPARTMENT OF THE ARMY U.S. ARMY CORPS OF ENGINEERS, HONOLULU DISTRICT FORT SHAFTER, HAWAII 96858-5440 September 21, 2020 SUBJECT: Standard Individual Permit Modification for Waikiki Beach Nourishment and Maintenance Project, DA File No. POH-2009-00345 Samuel J. Lemmo Administrator State of Hawaii, Department of Land and Natural Resources Office of Conservation and Coastal Lands Kalanimoku Building 1151 Punchbowl Street, Room 131 Honolulu, Hawaii 96813 Dear Mr. Lemmo: The U.S. Army Corps of Engineers, Honolulu District (Corps) received a letter dated August 12, 2020 from your agent, Sea Engineering, Inc., requesting to modify Department of the Army (DA) Permit No. POH-2009-00345. Your request proposes to increase the volume of sand that would be dredged from previously designated ocean recovery areas, pumped and transported via pipeline, and placed on Waikiki Beach between the Royal Hawaiian groin and Kuhio Beach stub groin. The purpose of the Waikiki Beach Nourishment and Maintenance project is to establish and maintain a reasonable beach width that supports recreational opportunities for the public. As you know, the original DA permit was issued on April 29, 2011 and authorized the initial beach nourishment using 24,000 cubic yards (cy) of sand that was hydraulically pumped from nearshore borrow areas onto Kuhio Beach Park for dewatering prior to placement on Waikiki Beach. The DA permit also authorized a subsequent sand re- nourishment event to maintain the beach width (position) that was established by the initial project implemented in 2012. Based upon projected beach recession rates at the time of the DA permit issuance, sand re-nourishment was estimated to be needed at Year 10 and would require the placement of 12,000 cy of additional sand to account for natural beach recession. Since then, the actual recession rates at this location have significantly outpaced the projected recession rates due to a number of unforeseen reasons. Consequently, the State of Hawaii, Department of Land and Natural Resources-Office of Conservation and Coastal Lands requires a larger amount of sand to be dredged and placed on Waikiki Beach than what was originally estimated and authorized for maintaining the 2012 beach width. According to your documents, including the engineering plans (Sea Engineering, Inc., dated July 24, 2020) submitted with your incoming permit modification request, the change in the Year 10 beach maintenance work is limited to the amount of sand needed to be placed on Waikiki Beach; and all other project features and methods would remain the same as previously authorized, including the boundaries of the sand recovery areas - 2 - where sand would be hydraulically dredged, the location and method for pumping and transporting the sand to the Kuhio Beach Park for dewatering, and the seaward boundary for the sand placement on Waikiki Beach. We have reviewed your request for a modification of the total volume of borrow sand to be placed on Waikiki Beach that would increase the estimated quantity from 12,000 cy to approximately 20,000 cy. After consideration of the information provided by your agent and our independent evaluation, we do not object to the proposed change and your DA permit is hereby modified. Except as modified herein, all terms and conditions of the original DA permit No. POH-2009-00345 remain in full force and effect, including all applicable special conditions. The expiration date of your permit is April 29, 2021. Please attach this letter to your countersigned copy of the original DA permit. Thank you for your cooperation with the Honolulu District Regulatory Program. Should you have any questions related to this permit modification, please contact me at (808) 835-4599 or via e-mail at [email protected]. You are encouraged to provide comments on your experience with the Honolulu District Regulatory Office by accessing our web-based customer survey form at http://corpsmapu.usace.army.mil/cm_apex/f?p=136:4:0. Sincerely, Susan A. M. Gayagas Senior Project Manager Enclosure cc (via email w/ encl): Darryl Lum, State of Hawaii, Department of Health, Clean Water Branch John Nakagawa, State of Hawaii, Coastal Zone Management Program Scott Sullivan, Sea Engineering, Inc. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES WAIKOLU WAY LAUULA ST ENGINEERING DIVISION DON HO ST SARATOGA RD KUHIO AVE ROYAL HAWAIIAN AVE HELUMOA RD NAHUA ST BEACH WALK SEASIDE AVE FOR LEWERS ST ROYAL HAWAIIAN SHOPPING DUKES LN KALIA RD CENTER KALAKAUA AVE HALEKULANI SHERATON OFFICE OF CONSERVATION AND COASTAL LANDS WAIKIKI ROYAL HAWAIIAN HOTEL OUTRIGGER WAIKIKI KAIULANIKOA AVE AVE PRINCE EDWARD ST WAIKIKI BEACH MOANA SURFRIDER WAIKIKI ROYAL HAWAIIAN BEACH GROIN JOB NO. E00XO30E KUHIO AVE ULUNIU AVE JOB NO. E00XO30E, WAIKIKI BEACH MAINTENANCE 2 KUHIO STUB GROIN LILIUOKALANI RD MAMALA KEALOHILANI AVE BAY KUHIO BEACH PARK KALAKAUA AVE OHUA AVE WAIKIKI BEACH MAINTENANCE 2 CARTWRIGHT RD PROJECT SITE LEMON RD PAOAKALANI AVE KAPAHULU AVE HONOLULU, OAHU, HAWAII LOCATION MAP INDEX OF DRAWINGS SHEET NO. DRAWING NO. DESCRIPTION 1 T-1 TITLE SHEET 2 G-1 GENERAL NOTES 3 C-1 SURVEY CONTROLS APPROVED: DATE: 4 C-2 EXISTING CONDITIONS (WAIKIKI BEACH) 5 C-3 EXISTING CONDITIONS (KUHIO BEACH PARK) 6 C-4 OVERALL PROJECT PLAN FEATURES SAMUEL J. LEMMO 7 C-5 SAND RECOVERY AREAS AND PIPELINE CORRIDOR ADMINISTRATOR OFFICE OF CONSERVATION AND COASTAL LANDS 8 C-6 DEWATERING SITE PLAN AND SECTION DEPARTMENT OF LAND AND NATURAL RESOURCES 9 C-7 SAND PLACEMENT PLAN, STA. 0+00 TO STA. 11+50 10 C-8 SAND PLACEMENT PLAN, STA. 12+00 TO STA. 17+28 APPROVED: DATE: 11 C-9 SAND PLACEMENT CROSS SECTIONS, STA. 0+00 TO STA. 2+50 12 C-10 SAND PLACEMENT CROSS SECTIONS, STA. 3+00 TO STA. 5+50 13 C-11 SAND PLACEMENT CROSS SECTIONS, STA. 6+00 TO STA. 8+50 PROJECT SITE 14 CARTY S. CHANG, P.E. C-12 SAND PLACEMENT CROSS SECTIONS, STA. 9+00 TO STA. 11+50 CHIEF ENGINEER ENGINEERING DIVISION 15 C-13 SAND PLACEMENT CROSS SECTIONS, STA. 12+00 TO STA. 14+50 DEPARTMENT OF LAND AND NATURAL RESOURCES ISLAND OF OAHU 16 C-14 SAND PLACEMENT CROSS SECTIONS, STA. 15+00 TO STA. 17+28 17 C-15 WATER QUALITY PROTECTION DETAILS DRAWING NO. T-1 JOB NO. E00XO30E SHEET NO. 1 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « GENERAL NOTES DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: NTS APPROVED: DRAWING NO. CHIEF ENGINEER DATE G-1 JOB NO. E00XO30E SHEET NO. 2 OF 17 SHEETS → → ← ← ← ← → → ← ← REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « SURVEY CONTROLS DESIGNED: DL SUBMITTED: JULY 24,2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 60' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-1 JOB NO. E00XO30E SHEET NO. 3 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « EXISTING CONDITIONS WAIKIKI BEACH DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 60' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-2 JOB NO. E00XO30E SHEET NO. 4 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « EXISTING CONDITIONS KUHIO BEACH PARK DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 80' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-3 JOB NO. E00XO30E SHEET NO. 5 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « OVERALL PROJECT PLAN FEATURES DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 150' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-4 JOB NO. E00XO30E SHEET NO. 6 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « SAND RECOVERY AREAS AND PIPELINE CORRIDOR DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 100' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-5 JOB NO. E00XO30E SHEET NO. 7 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « DEWATERING SITE PLAN AND SECTION DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: VARIES APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-6 JOB NO. E00XO30E SHEET NO. 8 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « SAND PLACEMENT PLAN STA. 0+00 TO STA. 11+50 DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 40' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-7 JOB NO. E00XO30E SHEET NO. 9 OF 17 SHEETS REVISION SYM. DESCRIPTION SHT./OF DATE APPROVED NO. STATE OF HAWAII DEPARTMENT OF LAND AND NATURAL RESOURCES ENGINEERING DIVISION WAIKIKI BEACH MAINTENANCE 2 « « SAND PLACEMENT PLAN STA. 12+00 TO STA. 17+28 DESIGNED: DL SUBMITTED: JULY 24, 2020 DRAWN: DL DATE: JULY 16, 2020 CHECKED: SS SCALE: 1" = 40' APPROVED: DRAWING NO. CHIEF ENGINEER DATE C-8 JOB NO. E00XO30E SHEET NO. 10 OF 17 SHEETS REVISION SYM.