UPPER NEWPORT BAY ECOSYSTEM RESTORATION PROJECT NEWPORT BEACH
UPPER NEWPORT BAY ECOSYSTEM RESTORATION PROJECT NEWPORT BEACH CITY COUNCIL STUDY SESSION FEBRUARY 14, 2006
WHY ARE WE CONCERNED ABOUT SEDIMENT DEPOSITION IN NEWPORT BAY? • Directly impacts open water habitat • Degrades other estuarine habitats • Adversely impacts resident and migratory species • Reduces tidal circulation in the Upper Bay • Allows easy access to sensitive habitat areas • Limits recreation and educational uses • Creates shoals in navigation channels and slips • Sediment TMDL Compliance
PROJECT OBJECTIVES • Manage sediment deposition in the Bay to sustain a balance of estuarine habitats • Reduce the frequency of dredging maintenance • Improve or restore estuarine habitats • Maintain water access for Reserve Managers • Remove natural and man-made features in Reserve that provide little or no value • Increase tidal circulation in stagnant water areas • Reduce potential human or predator access to sensitive habitat areas • Improve public use and access, and educational and recreational opportunities
PROJECT CONSTRAINTS • Avoid any net loss in salt marsh habitat • Limit future changes to all habitat types • Prevent the advance of one habitat or species at the cost of another • Minimize and/or avoid disturbance to wildlife
• PROJECT FEATURES Expand Deepen In-Bay Basins to – 20 feet MSL Unit I/III Basin (Upper Basin) Move larger tern island Dredge about 958, 000 cubic yards Increase open water area by about 19 acres Unit II Basin (Lower Basin) Dredge about 866, 000 cubic yards Increase open water area by about 19 acres
• PROJECT FEATURES (cont. ) n Construction of 12 Restoration Measures u u u Reconstruct side channels around small tern island, New Island, Middle Island Shellmaker Island Restore dredge spoil areas at Northstar Beach and Shellmaker Island Create a small channel at Shellmaker Island Cap tern islands with clean sand Segment main dike n Note: Some of the features listed have not been awarded in this construction phase
• Some of the Endangered Species of Concern • Least Terns • Light-Footed Clapper Rail
Project Financial Data • Project Costs - (65% Fed & 35% Non Fed) Ø Total = $39. 2 million (Includes Engineering & Design) Ø Federal = $25. 5 million Ø Non-Federal = $13. 7 million (Includes LERRDs) • Non-Federal Contributors Ø County of Orange - Formal Sponsor Ø CA Dept of Fish & Game – Formal Sponsor Ø CA Coastal Conservancy – $13 million grants • Project Operations & Maintenance Ø 100% Local Cost Ø Maintenance Cycle Once Every 21 Years
Project Construction Data • Contract awarded to DDM in Sep 2005. • Contract includes: Ø Base Contract (Ecosystem Restoration) Ø Options (Basin II Dredging & Northstar) • Start physical construction in Feb 2006. • Period for Base Construction is 400 days.
Base Contract • Base Contract Major Features: Ø Dredge access channel (Basin I/III & Basin II). Ø Create New Least Tern Island. Ø Enhance Hot Dog Island. Ø Create mudflats at 23 rd Street, Shellmaker & Bullnose West. Ø Restore channels at Middle, New, Hot Dog & Shellmaker Islands. • Base Contract Cost: Ø $11. 1 million.
Mobilized Equipment • 10 -inch hydraulic pipeline dredge. • Two tugboats. • Two 3000 cubic yard disposal scows. • Survey vessel. • Discharge pipeline.
Staging Areas • Newport Dunes Marina: Ø Interim site. Ø Crew change out. Ø Launch dredge. Ø Vessel support. Ø Contractor’s work trailer. • Northstar: Ø Interim site. Ø Stage discharge pipeline. • Lower Castaways: Ø Permanent site. Ø Usable within two months.
Upper Newport Bay Ecosystem Restoration
DUTRA HD PELICAN
Pelican Dimensions OVERALL LENGTH W/ LADDER OVERAL WIDTH SUCTION PUMP DIAMETER MINIMUM DREDGING DEPTH MAXIMUM DREDGING DEPTH - 71’ 17’ 7” 12” 3’ 20’
Wing Tanks FUNCTION: Port & Starboard Bouncy Tanks DIMENSIONS : 4’ x 45’ GROSS TONS: 5 each
Hydraulic Dredge
Discharge Pipe Fill Area
Scow DS-5 3000 cy Dump Scow BUILT BY: DIMENSIONS : GROSS TONS: ABS: F. M. C. – 1983 – Portland, OR 258 x 45 x 18 1836 Current Load Line
Scow DS-6 3000 cy Dump Scow BUILT BY: F. M. C. – 1983 – Portland, OR DIMENSIONS : 258 x 45 x 18 GROSS TONS: 1836 ABS: Current Load Line
Sea Lion Workboat
Cleo Brusco Terri L. Brusco Electronics Length 73’ Radar Furuno (2) Beam 24’ VHF Icom (5) Draft 8’ Autopilot Comnav Horsepower 1800 GPS/plotter Echotech (2) Fuel 23, 300 SSB Sea 222 Berths 6 Fathometer Datamarine (2)
Survey Boat BUILT BY: DIM ENSIONS : GROSS TONS: ENGINES: EQUIPMENT: Northwind 22’ x 8’ 10 2 - 90 HP GPS – FATHOMETER
- Slides: 24