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1999

Chenoweth Run Drainage Biological and Water Quality Investigation (Technical Report 54, January 1999)

NOTE:Title page indicates this as Technical Report 53, but cover was manually revised to 54. It is not entirely clear which is correct.

The Kentucky Division of Water, Ecological Support Section conducted this study to assess the relationship between nutrient concentrations and algal biomass and to determine whether nutrient controls, in the form of phosphorus reduction, may decrease nuisance Cladophora growth in Chenoweth Run.Chlorophyll a concentrations greater than 100 to 150 milligrams/square meter represent a "critical level" for aesthetic nuisance. Water quality problems related to excessive filamentous algal growth include diel fluctuations in pH and dissolved oxygen, clogging of water intakes, and interference with recreational uses (swimming and fishing). Non-point sources of nutrients include urban runoff in the upper portion of Chenoweth Run and pastures in the lower portions of the watershed. This study was conducted with the USGS to determine the most significant sources of nutrient pollution affecting Chenoweth Run. Five sites were sampled from March 3 through July 9, 1995.Samples (field data, water samples, and biomass samples) were collected at approximately three-week intervals. DO, pH, conductivity, temperature, current velocity, and depth were measured at sites with similar velocity and depth in areas with full sunlight in order to minimize effects of shading on algal growth. Three algal biomass samples were collected along a transect across each stream site. StatMat for Windows was used to calculate Pearson correlation coefficients for these data. Biomass parameters were significantly correlated with one another, but none of the biomass parameters correlated with any of the nutrient parameters. The nuisance levels of chlorophyll a (over 1,000 milligrams per square meter at some locations) decreased sharply after a heavy rainfall event in May and did not return to pre-spate levels for the remainder of the study even though nutrient concentrations remained high. Chlorophyll a concentrations decreased drastically at all sites after the May storm and did not exceed a mean of 150 mg/square meter in any later samples. It may be that increased temperature (greater than 20 C) inhibited growth once the substrate had been scoured. Further studies were suggested to determine nutrient limits that would help maintain benthic algal biomass at sub-nuisance levels. Controls that limit concentrations of nutrients in Chenoweth Run may help to prevent export of nutrients and control nuisance algal biomass further downstream in Floyds Fork and the Salt River.

[1999 Chenoweth Run Drainage Biological and Water Quality Investigation]

Cedar Creek Action Plan (1999)

The Cedar Creek Action Plan Update provides a detailed study of existing infrastructure, population projections, flow projections, and recommended alternatives to provide service to the Cedar Creek Service Area. The population projections estimated a 1999 population of 22,700 people and estimated 75,000 for the 20-year projection based on the Cornerstone 2020 data. The recommended conveyance alternative was compiled for 2-year, 10-year, and 20-year timeframes. In the first two years, it was recommended to eliminate the Birchwood WQTC and conduct an inflow and infiltration (I/I) investigation. In the 3- to 10-year timeframe, the Cedar Creek Road Pumping Station, Billtown Road Pumping Station, Rehl Road Pumping Station, and interceptors were recommended for construction.

From 11 to 20 years, South Bardstown Road Pumping Station and various interceptors were proposed to be constructed. The wastewater treatment plant was recommended to expand to 7.5 million gallons per day (mgd) by construction of a Vertical Loop Reactor. Additional recommendations included conducting additional conveyance system investigation including smoke testing and identification of rehabilitation work.

DIGITAL COPY OF THE REPORT CURRENTLY NOT AVAILABLE

Please contact Louisville MSD for copy

MSD Waters of Jefferson County-- Floyds Fork

In 1999, Louisville MSD published a report entitled Waters of Jefferson County -- Year Zero. This link provides an excerpt from the report dealing with the Floyds Fork watershed.

 

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