The U.S. Coast Guard Station, Port Huron, Michigan, is located at the southern end of Lake Huron near the lake's transition to the St. Clair River. A co-located small boat basin used for berthing search and rescue vessels has experienced chronic shoaling since its construction 1931. Multiple basin configuration changes have been made with the intention of reducing shoaling and/or annual dredging requirements to an acceptable level and to reduce wave energy, which causes mooring problems in the harbor. The location of the basin at this dynamic lake-to-river transition site is particularly problematic because of the strong unidirectional currents that influence sediment transport and navigation into and out of the basin. A field study and sediment-transport analysis examined the bathymetry and hydrodynamics of lower Lake Huron as they relate to the shoaling and resonance problems inside the basin. In addition, a physical model study identified a modified basin configuration that reduces both entrance shoaling and undesirable wave energy in the basin.

Diluted bitumen has been transported by pipeline in the United States for more than 40 years, with the amount increasing recently as a result of improved extraction technologies and resulting increases in production and exportation of Canadian diluted bitumen. The increased importation of Canadian diluted bitumen to the United States has strained the existing pipeline capacity and contributed to the expansion of pipeline mileage over the past 5 years. Although rising North American crude oil production has resulted in greater transport of crude oil by rail or tanker, oil pipelines continue to deliver the vast majority of crude oil supplies to U.S. refineries. Spills of Diluted Bitumen from Pipelines examines the current state of knowledge and identifies the relevant properties and characteristics of the transport, fate, and effects of diluted bitumen and commonly transported crude oils when spilled in the environment. This report assesses whether the differences between properties of diluted bitumen and those of other commonly transported crude oils warrant modifications to the regulations governing spill response plans and cleanup. Given the nature of pipeline operations, response planning, and the oil industry, the recommendations outlined in this study are broadly applicable to other modes of transportation as well.

Richtlijnen voor de werker in het veld om problemen te ondervangen ten aanzien van de waterkwaliteit voor irrigatie-doeleinden. Tenslotte worden praktijkervaringen uit diverse gebieden vermeld