Royal Hawaiian Groin Replacement

• Project Videos and Images:

• Sea Engineering, Inc. COMPLETION VIDEO (September, 2020)

• Project Construction Images (By date)

Project Completed (August, 2020)

• Construction Start Date: May 4, 2020

• Construction Completion: August 1, 2020

  Downloadable Files:

• Project Fact Sheet (Frequently Asked Questions)

• DLNR May 1, 2020 News Release

• DLNR May 30, 2020 News Release

• Updated Construction Plans (September, 2019)

• DLNR Resources

  • Video (Vimeo)

    • 5-15-20

  • Photographs

ROYAL HAWAIIAN GROIN REPLACEMENT

The existing Royal Hawaiian groin, located between the Waikiki Sheraton and the Royal Hawaiian hotels, is in an extremely deteriorated condition.  Its failure would result in the destabilization and loss of 1,730 feet of sandy shoreline located to the east of the groin.  The Department of Land and Natural Resources (DLNR) proposes to replace the existing Royal Hawaiian groin with a stable, engineered basalt rock groin.  The objective of the proposed project is to create a stable beach so that it can provide its intended recreational and aesthetic benefits, facilitate lateral access along the shore, and provide a first line of defense to the back-shore in the event of storm wave attack.  The groin is designed to maintain the approximate beach width of the 2012 Waikiki Beach Maintenance shoreline nourishment project.  No major enlargement of the beach is anticipated and no additional sand is part of this project.

Four options for a new groin were considered: 1) a new 180-foot-long rock L or T-head groin, 2) a new 280-foot-long rock L or T-head groin, 3) adaptive re-use of the existing groin as the core of a new 160-foot-long rock L-head groin, and 4) a new160-foot-long vertical concrete wall groin.  Selection of the preferred option (180 ft L-groin was made following coordination and review of the Draft Environmental Assessment (DEA).  Expected impacts of the four options are similar. 

Island:  Oʻahu
District: Honolulu
TMK: (1) 2-6-001:019
Proposing Agency: Department of Land and Natural Resources, State of Hawaiʻi. 1151 Punchbowl Street, Room 131. Honolulu, HI 96813
Consultant: Sea Engineering, Inc. Scott Sullivan, President.
Environmental Assessment (EA): Royal Hawaiian Groin Improvement Project Final EA published on May 23, 2016
End of Public Comment Period on Draft EA:   February 22, 2016
Contact Info: (808) 587-0049