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• 1. [Article] The Siuslaw pioneer ; 1975

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1975 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1975 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 2. [Article] The Siuslaw pioneer ; 1959

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1959 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1959 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 3. [Article] The Siuslaw pioneer ; 1961

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1961 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1961 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 4. [Article] Ecology and Management of Coastal Cutthroat Trout in Oregon

  Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. ...

  Citation × Citation Citation Abstract Copy Title: Ecology and Management of Coastal Cutthroat Trout in Oregon Author: Giger, Richard D., Oregon State Game Commission Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. Seawater tolerance, growth and age, survival, population size, migrations, estuarine distribution, and catch were examined through laboratory studies, fishery monitoring, netting and tagging and other methods. Title: Ecology and Management of Coastal Cutthroat Trout in Oregon Author: Giger, Richard D., Oregon State Game Commission Project F-72-R Final Report Hatchery and wild stocks of coastal cutthroat trout were studied from 1965 to 1972 on the Alsea, Siuslaw, and Nestucca rivers to provide information for improved fishery management. Seawater tolerance, growth and age, survival, population size, migrations, estuarine distribution, and catch were examined through laboratory studies, fishery monitoring, netting and tagging and other methods. Close

• 5. [Article] Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon

  Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well ...

  Citation × Citation Citation Abstract Copy Title: Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon Author: Bulkley, Ross V., Oregon State Game Commission Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well as the contribution of hatchery fish to the catch. Title: Catch of the 1965 Tidewater Cutthroat Sport Fishery and Notes on the Life History of the Coastal Cutthroat Trout in the Siuslaw River, Oregon Author: Bulkley, Ross V., Oregon State Game Commission Coastal cutthroat ecology: F-72-R-2 This document contains the initial results of a study initiated in 1965 to determine the magnitude of the cutthroat trout fishery on the Siuslaw River estuary, as well as the contribution of hatchery fish to the catch. Close

• 6. [Article] Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon

  At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and ...

  Citation × Citation Citation Abstract Copy Title: Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon Author: Bayer, Range D., 1947-, Lowe, Roy W., 1953- At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and Range Bayer completed 429 censuses. Unfortunately, these censuses do not give a complete picture of the seasonality, abundance, and distribution for all waterbirds or mammals at Siuslaw Estuary because USFWS biologists mainly censused waterfowl, Bayer pooled all gulls and "peeps," only Bayer censused mammals, no one censused the entire Siuslaw Channel for all birds, and no one made many censuses in summer. Further, only Woolington sometimes censused nonwaterfowl in intertidal salt marshes. Nevertheless, there are sufficient censuses to greatly elucidate the status and distribution of many species. Highlights are given in the rest of this paragraph. Humans, especially those with hunting dogs, sometimes disrupted bird activity. Harbor seals regularly rested in the water or hauled out at two embayments in the lower Siuslaw Estuary during high tide. Brown Pelicans were uncommon. The Siuslaw region is a very important area along the Oregon Coast for wintering Tundra Swans, but their abundance sometimes changes from year to year. Great Basin Canada Geese (which were released here in 1983) now nest at the Siuslaw and appear to be permanent residents with some migrants sometimes swelling the population. Dabbling ducks and diving ducks were most abundant in January-March. Osprey and Bald Eagles were occasionally present in low numbers, but no Peregrine Falcons or Snowy Plovers were reported. American Coot numbers averaged less than 10/census. Yellowlegs and Whimbrels were only recorded during spring and fall migrations. Sanderlings were the most common "peep" in winter with as many as 260 recorded. Western Gull nesting was not apparent in the Estuary. Crows were abundant in intertidal areas in November-March, and Common Ravens were not numerous but were seen surprisingly often. Several birds normally considered as "terrestrial" were occasionally found on intertidal rocks, mudflats, or sandflats. It is also clear from these censuses that there can often be significant within-day (i.e., tidal), within-month, seasonal, and yearly variation in bird numbers. If possible, there should be several censuses each month under similar tidal conditions, so that the range in monthly variation can be determined. Unless monthly variation is measured each year, apparent differences in animal numbers between years may not represent real yearly variation in animal populations but may simply be artifacts of inadequate censusing. Unfortunately, it may not be feasible to do more than one census each month. But if the results are cautiously interpreted, one census/month is valuable and is certainly better than none. Because of the different censusing methods of Woolington, Bayer, and USFWS Biologists; it isn't possible to robustly compare their different study areas at the Siuslaw. However, a few comments about specific areas are in order. Many waterbird taxa (especially waterfowl) were more abundant east of the Highway 101 bridge at Florence than west of the bridge. The South Jetty Deflation Plain was the most important area at the Siuslaw for Tundra Swans. Site 8 (which is proposed to become a boat marina) was used by a greater variety of birds and usually more birds than the two adjacent, potential mitigation sites. Finally, Wendson Pasture received the heaviest use by Canada Geese and dabbling ducks of any area that was censused at the Siuslaw. Title: Waterbird and mammal censuses at Siuslaw Estuary, Lane County, Oregon Author: Bayer, Range D., 1947-, Lowe, Roy W., 1953- At the Siuslaw Estuary or some adjacent areas, U. S. Fish and Wildlife Service (USFWS) Biologists John Annear, John Cornely, and Roy Lowe conducted 67 censuses; Maureen Woolington made 90 censuses, and Range Bayer completed 429 censuses. Unfortunately, these censuses do not give a complete picture of the seasonality, abundance, and distribution for all waterbirds or mammals at Siuslaw Estuary because USFWS biologists mainly censused waterfowl, Bayer pooled all gulls and "peeps," only Bayer censused mammals, no one censused the entire Siuslaw Channel for all birds, and no one made many censuses in summer. Further, only Woolington sometimes censused nonwaterfowl in intertidal salt marshes. Nevertheless, there are sufficient censuses to greatly elucidate the status and distribution of many species. Highlights are given in the rest of this paragraph. Humans, especially those with hunting dogs, sometimes disrupted bird activity. Harbor seals regularly rested in the water or hauled out at two embayments in the lower Siuslaw Estuary during high tide. Brown Pelicans were uncommon. The Siuslaw region is a very important area along the Oregon Coast for wintering Tundra Swans, but their abundance sometimes changes from year to year. Great Basin Canada Geese (which were released here in 1983) now nest at the Siuslaw and appear to be permanent residents with some migrants sometimes swelling the population. Dabbling ducks and diving ducks were most abundant in January-March. Osprey and Bald Eagles were occasionally present in low numbers, but no Peregrine Falcons or Snowy Plovers were reported. American Coot numbers averaged less than 10/census. Yellowlegs and Whimbrels were only recorded during spring and fall migrations. Sanderlings were the most common "peep" in winter with as many as 260 recorded. Western Gull nesting was not apparent in the Estuary. Crows were abundant in intertidal areas in November-March, and Common Ravens were not numerous but were seen surprisingly often. Several birds normally considered as "terrestrial" were occasionally found on intertidal rocks, mudflats, or sandflats. It is also clear from these censuses that there can often be significant within-day (i.e., tidal), within-month, seasonal, and yearly variation in bird numbers. If possible, there should be several censuses each month under similar tidal conditions, so that the range in monthly variation can be determined. Unless monthly variation is measured each year, apparent differences in animal numbers between years may not represent real yearly variation in animal populations but may simply be artifacts of inadequate censusing. Unfortunately, it may not be feasible to do more than one census each month. But if the results are cautiously interpreted, one census/month is valuable and is certainly better than none. Because of the different censusing methods of Woolington, Bayer, and USFWS Biologists; it isn't possible to robustly compare their different study areas at the Siuslaw. However, a few comments about specific areas are in order. Many waterbird taxa (especially waterfowl) were more abundant east of the Highway 101 bridge at Florence than west of the bridge. The South Jetty Deflation Plain was the most important area at the Siuslaw for Tundra Swans. Site 8 (which is proposed to become a boat marina) was used by a greater variety of birds and usually more birds than the two adjacent, potential mitigation sites. Finally, Wendson Pasture received the heaviest use by Canada Geese and dabbling ducks of any area that was censused at the Siuslaw. Close

• 7. [Article] The Siuslaw pioneer ; 1948

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1948 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1948 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 8. [Article] The Siuslaw pioneer ; 1950

  Gerald W. Williams Collection

  Citation × Citation Citation Abstract Copy Title: The Siuslaw pioneer ; 1950 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Title: The Siuslaw pioneer ; 1950 Author: Siuslaw Pioneer Association (Or.) Gerald W. Williams Collection Close

• 9. [Article] Shoreline changes due to jetty construction on the Oregon Coast

  Patterns of beach erosion and accretion due to jetty construction are examined for the coast of Oregon. All jetty systems are included with the exception of those on the Columbia River, making a total ...

  Citation × Citation Citation Abstract Copy Title: Shoreline changes due to jetty construction on the Oregon Coast Author: Lizarraga Arciniega, Jose Roman Patterns of beach erosion and accretion due to jetty construction are examined for the coast of Oregon. All jetty systems are included with the exception of those on the Columbia River, making a total of nine systems. All evidence indicates that these areas of the Oregon coast are experiencing a seasonal reversal in the sand drift, but with a zero or near zero net drift over a several years time span. Thus, shoreline changes resulting from jetty construction are not the usual examples of jetties blocking a net drift as found in southern California and elsewhere. In general, accretion of the shoreline took place adjacent to the jetties following their construction, both to the north and south. This accretion resulted mainly from the embayment formed between the jetty and the pre-jetty shoreline, the embayment becoming filled until the shoreline is straight and again in equilibrium with the waves such that there is a zero net sand drift. In some cases, as at the entrance to Yaquina Bay, the jetties are oblique to the trend of the shoreline and so produced a protected zone from the waves where accretion could occur. Sand for the accretion adjacent to the jetties was derived from beach erosion at greater distances from the jetties. The severity of the erosion depended on the total amount of sand required for the beach accretion to a new equilibrium, and the length of beach that was undergoing erosion. When only a short stretch of beach occurs to one side of the jetties, as at Bayocean Spit, then the resulting erosion was particularly severe, in that case leading to the breaching of the spit. A computer model is developed to simulate the shoreline changes that occurred following construction of the jetties on the Siuslaw River mouth. The model demonstrates deposition next to the jetty to fill the embayment created by the jetty, and erosion at greater distances from the jetty. The shoreline advances of the model agreed closely with the actual shoreline changes found in surveys following jetty construction. Title: Shoreline changes due to jetty construction on the Oregon Coast Author: Lizarraga Arciniega, Jose Roman Patterns of beach erosion and accretion due to jetty construction are examined for the coast of Oregon. All jetty systems are included with the exception of those on the Columbia River, making a total of nine systems. All evidence indicates that these areas of the Oregon coast are experiencing a seasonal reversal in the sand drift, but with a zero or near zero net drift over a several years time span. Thus, shoreline changes resulting from jetty construction are not the usual examples of jetties blocking a net drift as found in southern California and elsewhere. In general, accretion of the shoreline took place adjacent to the jetties following their construction, both to the north and south. This accretion resulted mainly from the embayment formed between the jetty and the pre-jetty shoreline, the embayment becoming filled until the shoreline is straight and again in equilibrium with the waves such that there is a zero net sand drift. In some cases, as at the entrance to Yaquina Bay, the jetties are oblique to the trend of the shoreline and so produced a protected zone from the waves where accretion could occur. Sand for the accretion adjacent to the jetties was derived from beach erosion at greater distances from the jetties. The severity of the erosion depended on the total amount of sand required for the beach accretion to a new equilibrium, and the length of beach that was undergoing erosion. When only a short stretch of beach occurs to one side of the jetties, as at Bayocean Spit, then the resulting erosion was particularly severe, in that case leading to the breaching of the spit. A computer model is developed to simulate the shoreline changes that occurred following construction of the jetties on the Siuslaw River mouth. The model demonstrates deposition next to the jetty to fill the embayment created by the jetty, and erosion at greater distances from the jetty. The shoreline advances of the model agreed closely with the actual shoreline changes found in surveys following jetty construction. Close

• 10. [Article] Precipitation characteristics for landslide hazard assessment for the central Oregon Coast Range

  Precipitation data from 1988-1995 for 13 rain gauges of the Department of Forest Engineering rain gauge network, and a longer precipitation record, 1976-1995, at Mapleton were analyzed. The objectives ...

  Citation × Citation Citation Abstract Copy Title: Precipitation characteristics for landslide hazard assessment for the central Oregon Coast Range Author: Surfleet, Christopher G. Precipitation data from 1988-1995 for 13 rain gauges of the Department of Forest Engineering rain gauge network, and a longer precipitation record, 1976-1995, at Mapleton were analyzed. The objectives were to assess the spatial and temporal distribution of precipitation intensity and antecedent precipitation, and understand the role of these characteristics for triggering debris slides from headwalls in the central Oregon Coast Range. Frequency distribution curves and recurrence intervals using a partial-duration series were calculated for the maximum 5-minute, 30 minute, 1 hour, 2 hour, 6 hour precipitation durations and antecedent precipitation index (API) for the rain gauge network and the maximum 1 hour and 2 hour precipitation durations for Mapleton. Isohyet lines showing selected 2-year precipitation intensities and API were used to characterize the spatial distribution of precipitation intensity and API across the central Oregon Coast Range. The effect of elevation on this spatial distribution was investigated. An attempt to quantify the occurrence of high intensity precipitation occurring with high antecedent precipitation, which is hypothesized to trigger debris slides, was done by testing if the highest precipitation intensities (greater than a 1 -year recurrence interval) occurred during the storms with the highest API. API and precipitation intensity were tested for correlation to discern if a particular precipitation duration could be used to predict API, thus make it possible to use a precipitation intensity based threshold to assess the general hazard of landslides. Precipitation intensities associated with selected recurrence intervals vary considerably over the study area. Precipitation values for selected durations and recurrence intervals could vary as much as 50% or larger for selected rain gauge locations. Precipitation intensities are higher in the central portion of the study area, centered around the ridges of the Siuslaw River watershed, with decreasing intensity toward the northern and southern boundaries possibly due to topographic influences. Higher API values are found more frequent where the high precipitation intensity spatial trends exists. Relationships between short duration precipitation intensities with elevation, and API with elevation, within the rain gauge network could not be determined. No single precipitation intensity, including total storm precipitation, showed a strong positive correlation with high API for the entire rain gauge network. It appears that any attempts to predict the precipitation characteristics which trigger headwall failure by a precipitation intensity threshold in the central Oregon Coast Range is not possible. Attempts to assess the risk of headwall failure by high API may be possible. High precipitation intensities occurred with high antecedent precipitation conditions and they occur at the highest antecedent precipitation conditions. Title: Precipitation characteristics for landslide hazard assessment for the central Oregon Coast Range Author: Surfleet, Christopher G. Precipitation data from 1988-1995 for 13 rain gauges of the Department of Forest Engineering rain gauge network, and a longer precipitation record, 1976-1995, at Mapleton were analyzed. The objectives were to assess the spatial and temporal distribution of precipitation intensity and antecedent precipitation, and understand the role of these characteristics for triggering debris slides from headwalls in the central Oregon Coast Range. Frequency distribution curves and recurrence intervals using a partial-duration series were calculated for the maximum 5-minute, 30 minute, 1 hour, 2 hour, 6 hour precipitation durations and antecedent precipitation index (API) for the rain gauge network and the maximum 1 hour and 2 hour precipitation durations for Mapleton. Isohyet lines showing selected 2-year precipitation intensities and API were used to characterize the spatial distribution of precipitation intensity and API across the central Oregon Coast Range. The effect of elevation on this spatial distribution was investigated. An attempt to quantify the occurrence of high intensity precipitation occurring with high antecedent precipitation, which is hypothesized to trigger debris slides, was done by testing if the highest precipitation intensities (greater than a 1 -year recurrence interval) occurred during the storms with the highest API. API and precipitation intensity were tested for correlation to discern if a particular precipitation duration could be used to predict API, thus make it possible to use a precipitation intensity based threshold to assess the general hazard of landslides. Precipitation intensities associated with selected recurrence intervals vary considerably over the study area. Precipitation values for selected durations and recurrence intervals could vary as much as 50% or larger for selected rain gauge locations. Precipitation intensities are higher in the central portion of the study area, centered around the ridges of the Siuslaw River watershed, with decreasing intensity toward the northern and southern boundaries possibly due to topographic influences. Higher API values are found more frequent where the high precipitation intensity spatial trends exists. Relationships between short duration precipitation intensities with elevation, and API with elevation, within the rain gauge network could not be determined. No single precipitation intensity, including total storm precipitation, showed a strong positive correlation with high API for the entire rain gauge network. It appears that any attempts to predict the precipitation characteristics which trigger headwall failure by a precipitation intensity threshold in the central Oregon Coast Range is not possible. Attempts to assess the risk of headwall failure by high API may be possible. High precipitation intensities occurred with high antecedent precipitation conditions and they occur at the highest antecedent precipitation conditions. Close