The project involved the design and construction of fourteen complex logjams within a 0.5-mile segment of the lower South Fork Nooksack River (RM0.9-RM1.4) near the mouths of Tawes and Caron Creeks. The goal of the project was to address the habitat factors most limiting the South Fork Nooksack early chinook population in the reach: low habitat diversity, lack of deep holding pools with cover, and high summer water temperatures. According to the Puget Sound TRT, the South Fork population has the highest risk of near-term extinction among the 22 populations that comprise the Puget Sound Chinook ESU, and its recovery is considered critical to recovery of the ESU as a whole. The highest near-term priority for WRIA 1 salmon recovery is to conserve the South Fork early chinook population by initiating a native stock-rebuilding program and implementing projects that deliver immediate improvement in capacity and productivity downstream from the hatchery program site (RM14.3). The project, the third in a series of logjam projects below the Acme Bridge (RM8.5), was designed and constructed to increase the frequency and depth of holding pools, availability of instream cover, and availability of temperature refugia by encouraging formation of complex pools in a zone of groundwater and tributary influence to the river. Life stages affected include upstream migration, holding, spawning, and rearing for early chinook; bull trout and steelhead that spawn higher in the basin will also be affected.