Engineering Disciplines


Services

Lake & Pond Restoration

San Joaquin Marsh Enhancement, Phases I and II, Irvine, CA.

San Joaquin Marsh is a fresh water marsh that is managed as part of the University of California Natural Reserve System. The purpose of the Phase I Enhancement was to provide a reliable water source to a series of managed ponds to promote native marsh habitat. Noble Consultants was responsible for the planning; permitting; investigation; surveying; design; cost estimation; and preparation of plans, specifications, and contract documents for improving approximately 40 acres of historic wetland. Design services included civil, electrical and mechanical engineering, and landscape architecture. Construction oversight was also provided. The California State Coastal Conservancy funded this work. The project components included removing invasive plant species; grading twelve ponds to provide a setting for a range of native plant species; improving existing internal levees; constructing a pump station and a pipeline system to provide water to all of the ponds; installing water control structures; and planting native species.

Phase 2 of the San Joaquin Marsh Enhancement Project involved recreating the historic hydrology of the marsh by improving the infrastructure for routing and delivering water throughout the area adjacent to the managed ponds that were enhanced in Phase I. Noble Consultants was the prime consultant responsible for the project, under contract with the University of California, Irvine for Phase II while for Phase I work Noble Consultants was under contract to the California State Coastal Conservancy. Work for this phase involved surveying, planning, permitting, design, and preparation of contract documents. The design services included civil, electrical, and mechanical engineering, and wetlands design. Project components included excavation to provide channelization for water distribution; excavation to create a muted fresh water marsh connection to the creek; construction of a pipeline through a flood control levee; construction of a pipeline from an existing well to supplement creek water; and improving existing levees.

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Laguna Niguel Lake Refurbishment, Laguna Niguel, CA.

NCI provided the engineering services for removing 200,000 cubic yards of accumulated material from a 40-acre lake and constructing miscellaneous lake improvements. Engineering services included planning; permit preparation and processing; sampling and testing; design; preparation of plans, specifications and cost estimates; quantity computations; alternative disposal site analysis; and construction services. Due to budgeting constraints, the project was to be phased over a five-year period. As a result of planning, the optimum project involved draining the lake; removing 100,000 cubic yards of material by processing it and reusing it to create an in-lake, 4-acre dredged material disposal site, to improve lake perimeter roads, and to reconstruct a wildlife island; landscaping; and, aquatic vegetation planting to improve water quality. The engineering included design of the disposal area perimeter dike and decant weir, and specifications for future dredging of the remaining material with placement in the disposal area. Additional funding became available during construction that allowed removal of all accumulated material. Excess material was placed in the disposal area. Subsequently, NCI prepared plans and specifications for removing the stockpile and disposal site perimeter dike material, and using it on a County road project.
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Hansen Dam 15-Acre Recreational Lake, Los Angeles, CA.

The Corps of Engineers was directed to plan, design and construct a recreational lake and associated recreational facilities at Hansen Dam. To initiate the planning and design process, NCI prepared the Feature Design Memorandum that presented all engineering design criteria for final design and construction of a 2-acre swimming area for swimming, sunbathing and child's wading activities; a 13-acre recreational water area for non-powered boating, sailing and fishing uses; and associated recreational facilities for parking, turf/picnic areas, restrooms, lifeguard buildings and stands, launching ramp, footpath and service road. This included engineering criteria for all civil design, hydraulic design, landscape design, and design of associated recreational facilities. Design elements consisted of the lake's physical layout; lake liner and shoreline treatments; drainage features; and water quality control for the swimming area, filtration pond and recreational area. Water quality control consisted of chlorination, circulation/filtration, aeration and ozonation systems. A comprehensive construction cost estimate and operations/maintenance cost estimates were developed for this project using the Corps' M-CACES program.

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Laguna Coast Wilderness Park-Laguna Lakes Restoration, Laguna Beach, CA.

NCI was responsible for the design, preparation of plans and specifications, and construction monitoring for the restoration of three lakes and adjacent foliage in the Laguna Canyon Greenbelt area. The purpose of the project was to improve water quality in the lake, eliminate flood related influx of upland sediment, and encourage the growth of native plant species. The components of the project included removal of accumulated sediment, construction of a sedimentation basin and overflow structure, removal of sediment from a box culvert between two of the lakes, construction of berms to encourage wetland plant growth in upland areas, removal of eucalyptus trees and other exotic plants, and planting of native species. The project was completed prior to the heavy rains in 1998. The sediment basin functioned as designed to eliminate influx of unwanted sediment into the lakes.

Scottsdale Pond Park Improvement, Novato, CA.

Scottsdale Pond is a 10-acre pond located in the City of Novato that is a flood control and recreational park facility. It is a non-contact water area that is used by birds and enjoyed by the public. The purpose of this improvement was to improve water quality to the pond, construct an island, improve the aesthetics around the perimeter of the pond, and improve public access. Noble Consultants was the prime consultant responsible for the surveying, investigations, planning, permitting, design and preparation of contract documents for the project. Design services involved civil, electrical, and mechanical engineering, and landscape architecture. Project components included excavation of the pond; construction of an island; installation of aerators; contour of upland area to provide scenic berms; provide ADA access; planting around the pond and on the island; improve aesthetics of existing hardscape features; and provide mitigation for reduction of flood storage capacity.

Three alternatives were developed during the planning phase that varied the size and shape of the island, the quantity of material to be excavated from the pond and landside improvements. Variations in the size and shape of the island were proposed to alter the potential impacts on flood flows around the island and to alter the variety of plants that could be used. Also, the island layout and pond bank excavation were designed to minimize the chance for invasive plants to grow.

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