Georgiana Slough Erosion Control and Habitat Enhancement Project

The Georgiana Slough Erosion Control and Habitat Enhancement Project is a civil construction initiative led by the Brannan-Andrus Levee Maintenance District to address critical erosion and undercutting issues along the right bank of Georgiana Slough on Lower Andrus Island, California. The project involves the placement of quarry stone riprap at the levee toe to form a foundation for a berm bench extending along the entire length of the site, with additional work including material import and export, hauling operations, and phased construction activities such as mobilization and site preparation. Minor modifications made since the August 2024 approval of the Initial Study/Mitigated Negative Declaration now affect the sequencing of construction, the sourcing and handling of materials, and the compaction methodology for fill, which must achieve a minimum of 95% relative compaction in 4 to 6-inch layers using a sheepsfoot roller or equivalent, in accordance with ASTM D1557-91. The project is tied to air quality compliance under the Sacramento Metropolitan Air Quality Management District’s thresholds, with revised emissions modeling reflecting increased greenhouse gas emissions and diesel particulate matter due to additional hauling trips and equipment use, as documented in the attached Air Quality and Greenhouse Gas Technical Memorandum dated June 2025. Although the project is posted as a forecast with a solicitation number referencing an IS/MND addendum, no formal contract type, pricing structure, or procurement mechanism including CLINs or contract value is provided, and no bid solicitation details, evaluation factors, award basis, or contract administration data such as payment office, COR/COTR, or invoicing method are available. The performance location is identified as Isleton, California, with a posted date of August 22, 2025, and primary contact information is provided through the District Engineer, Emily Pappalardo, but no formal offeror certifications, size status, UEI/CAGE codes, or representation requirements are included. The effort is technically and environmentally focused, with contractual and procurement elements largely absent, suggesting this is a planning, reporting, and environmental compliance update rather than a formal solicitation or award document.