Lincoln Crossing

The Lincoln Crossing project consists of a 1070-acre multi-use development, in Placer County, CA. Construction of the development occurred by in three phases and included mass grading, onsite and offsite infrastructure installation, the realignment and creation of wetland features (including mitigation wetlands), the installation of 6 bridge crossings, creation of a floodway channel. The major constraints at the site were the high clay content of the soil, dust issues, and the sensitive water bodies.

 

During Phase I, ECORP provided assistance for compliance with the State Water Resources Control Board (SWRCB) National Pollution Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction Activities (CGP). ECORP staff designed the Storm Water Pollution Prevention Plan (SWPPP) and oversaw SWPPP implementation. They conducted the before, after and during rain event inspections, prepared SWPPP inspection reports and oversaw BMP installation to ensure proper installation. As part of the SWPPP Plan, and due to the specific soil chemistry and amount of exposed acreage, an Active Treatment System (ATS) was needed during the rainy season. Following coordination meetings with the Engineer, owner, and ATS purveyor, the location of ditches, filtration apparatus, and containment/pumping areas were determined. Initial Chitosan batch treatment in the containment basins, which were sized to contain at least the 10-year 6-hour rain event, followed by additional Chitosan injections and finally sand media filtration did not adequately flocculate and filter the sediment. It was soon determined that based on the soil chemistry at the Lincoln Crossing site, KlarAid was a better flocculating agent. By the second season, the Lincoln Crossing development employed three separate ATS units. ECORP collected effluent water quality samples and delivered to Environmental Protection Agency (EPA) approved laboratory to be analyzed for the presence of residual chemicals. ECORP was also responsible for collecting and recording pH and turbidity data that would be included in the Filtration Monitoring Report as required by the Regional Water Quality Control Board (RWQCB).

 

During Phase II, rough graded villages were sold to individual commercial and residential developers. ECORP prepared and submitted Change of Information (COI) forms to the SWRCB to remove the acreages from coverage under the Lincoln Crossing Waste Discharge Identification (WDID) number.

 

ECORP was also contracted by most of the new owners to prepare NOIs and site-specific SWPPPs for current site conditions of individual villages. ECORP attended pre-construction meetings and provided copies of SWPPPs to City Inspectors. A majority of the villages drained to the ATS operated by SunCal, and therefore this was incorporated into the individual SWPPPs along with additional BMP measures. ECORP also conducted regular SWPPP inspections for several of the new developers.

 

ECORP management attended weekly stormwater meetings with the overall property owner and representatives from each of the individual developers. At the meetings Best Management Practice (BMP) measures, weather forecasts, and subcontractor SWPPP awareness training were discussed. Following the meetings, inspections were conducted with the City of Lincoln SWPPP Inspector.

 

ECORP assisted the developers with recommendations for coming into compliance with the permit and provided responses or liaison with the Inspectors. ECORP has also prepared the Annual Compliance Reports and the Notice of Termination (NOT) for the Lincoln Crossing project, both of which were submitted to the RWQCB.

 

In addition to the above SWPPP services provided, ECORP also conducted all of the natural resource studies required by the six environmental agencies with jurisdiction over the project. Site investigations included wetland delineations, special status species surveys, arborist surveys, and water quality analysis. The project required permits from, and liaison with, U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, National Marine Fisheries Service, Regional Water Quality Control Board, California Department of Fish and Game, Department of Water Resources, and the City of Lincoln. Additional ECORP tasks for the project included:

 

  • Negotiation with resource agencies for placement of 6 miles of multi-use trails, public use structures, outfall structures and water quality basins in the preserve
  • Cooperation with project engineers, including Civil Solutions, Inc., to develop trail specifications and alignments
  • Design of waterways, slope/bank stabilization and construction oversight
  • Production of landscaping and irrigation plans for 4.1 miles of riparian corridor, including 4451 plantings of ten native tree species and five native shrub species, and plans for revegetation of wetlands, low-flow channels and upland zones with native plants
  • Environmental permitting for off-site components of the project
  • Development of mitigation and monitoring plans for on-site and off-site impacts
  • Production of reports on anticipated costs for perpetual maintenance and environmental compliance within the preserve
  • Continued monitoring of the Lincoln Crossing preserve to ensure ongoing compliance environmental permits and the Lincoln Crossing Preserve Area Operations and Management Plan
 

 

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