| Client: |
Reclamation District 830 |
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| Location: |
Oakley, California |
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| Challenges: |
Rehabilitation of existing perimeter levee systems in a fragile delta environment. |
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| Services Provided: |
District Engineer for Reclamation District 830, Civil Engineering Design, Preparation of Construction Specifications, Bidding and Award assistance, Construction Management and Construction Staking Services. |
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Jersey Island consists of approximately 3,200 acres, 16 miles of levee improvements and discharge/evaporation ponds owned and operated by the Ironhouse Sanitary District (ISD). As such the stability of the island's levees is critical to maintaining ISD's operations. Milani & Associates provides engineering design services in conjunction with Hultgren-Tillis Engineers and RD 830's geotechnical engineer, to upgrade and maintain the islands levee berm and levee road improvements.
Jersey Island additionally maintains active crop and grazing lands, and portions of the levee road are public access corridors to adjoining islands, such as Bradford Island. Maintaining adjoining island access poses complications to on island levee widening and stabilization programs since the road improvements must be kept accessible, particularly during late spring and summer when farming activities are at full capacity. Furthermore, all levee work must automatically be coordinated with the State of California Department of Water Resources (DWR), a major funding resource for the island's ongoing levee stabilization program.
Milani and Associates provided a detailed assessment of the island, along with a corresponding action plan to address areas of risk including a levee widening program funded by DWR. Phase one involved the import of approximately 160,000 cubic yards of material from Decker Island to be utilized as levee buttress fill on Jersey Island. All material was barged from Decker Island to Jersey Island as part of a wetland restoration project undertaken by DWR on Decker Island. Milani & Associates coordinated work efforts with DWRÕs engineer on Decker Island and the project was completed ahead of schedule.
Phase Two will consist of raising the levee crest to meet additional freeboard requirements. The approach will require on-island excavation of approximately 80,000 cubic yards and placing the fill to create a wider levee with increased flood protection.
Functioning as the District Engineer for Reclamation District 830, Milani & Associates provides all Civil Engineering and Survey/Mapping services and is responsible for preparation of all related construction documents, bid documents, specifications, bid advertising, bid opening and assistance in contractor selection. Milani also provides all construction staking services and onsite construction management.
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