Total maximum daily loads and waste load allocations for Las Vegas Bay: Rationale and calulations

In September 1987 the Nevada Division of Environmental Protection revised Water Quality Standards for Las Vegas Wash (LVW) and Lake Mead. Standards were set for chlorophyll-a and unionized ammonia in Las Vegas Bay (LVB) (NDEP 1987). The 1986 and 1987 LVB data showed non-achievement of both the chlorophyll-a and unionized ammonia standard which triggered an analysis of total phosphorus and total ammonia Total Maximum Daily Loads and Waste Load Allocations which are presented in this report. This report is separated into three sections: 1. 1987 Las Vegas Bay Water Quality Conditions and Seasonal Periodicity. 2. Concentration Estimates at Northshore Road to Meet Water Quality Standards in Las Vegas Bay. 3. Total Maximum Daily Loads at North Shore Road and Waste Load Allocations. Blue-green algae were present in 1987 but did not build to bloom levels observed in 1986. Mean summer chlorophyll-a at station 3 was 53.2 ug/1 which is considerably higher than the standard of 30 ug/1 (4 year mean). From April 9 through August 3 unionized ammonia was never below the .04 mg/1 chronic toxicity standard at station 2. The acute unionized ammonia standard (.45 mg/1) was not exceeded. The standards were not achieved from April through September but were met from October through March. Over the period of record examined (1977-1987) the density of LVW has decreased significantly in comparison to LVB. At present, there are months when LVW enters LVB as a neutrally buoyant or buoyant jet

Las Vegas Wash and Lake Mead proposed water quality standards: Revisions and rationale

Rationale of review and for proposed changes to the Nevada Pollution Control Regulations (NAC 445.1354, 445.1355, 445.1356, 455.1367, 445.1352, 445.1353, 445.1350, 445.1351) before the State Environmental Commission on June 23 and 24, 1987

Appendices to analysis of the water-quality standards proposed by Nevada Division of Environmental Protection

The appendices include the following: Appendix A: Evaluation of proposed State of Nevada water quality standards for Ammonia, produced by CH2M Hill California for Clark County Appendix B: Responses to comments by the Nevada Division of Environmental Protection on the draft final report prepared by CH2M Hill Appendix C: Biases in the ammonia data and in the proposed ammonia TMDL Appendix D: Application of dilution-ratio analysis to assertions made by the Nevada Division of Environmental Protection Appendix E: Analysis of the dilution-ratio formula used by the Nevada Division of Environmental Protection in its TMDL calculations for phosphorus and ammonia in Las Vegas Bay, Lake Mead Appendix F: Monitoring stations in Lake Mead, Nevada: A Technical description Appendix G: Clark County water quality standards review preliminary scope of work—phase II Appendix A: Current measurement and much more: Advanced engineering for reliability at sea Appendix B: Wave climate dat

Findings from the Nevada Business Summit on Early Childhood Investment

On February 10, 2010, a partnership of the United Way of Southern Nevada, the UNLV Nevada Institute for Children’s Research and Policy, the Agassi Foundation for Education and the State of Nevada Head Start State Collaboration Office, with support from The Lincy Foundation, hosted the Nevada Business Summit on Early Childhood Investment. The summit met to discuss effective ways to invest in early childhood education and health, in hopes of creating solutions that would provide long term human capital development through early intervention. The summit tied issues of employment opportunities, job readiness and economic trends with the need to invest in early childhood programs to enhance Nevada\u27s growth and competitiveness in the United States and global economy. During the summit, members of the business and early childhood community heard from three guest speakers which highlighted the connection between business and early childhood development. First, Dr. Pat Levitt discussed toxic stress and its impact on learning and health, followed by Dr. Art Rolnick who presented on early childhood development and public return on investment, and ended with Dr. Robert Dugger who put forth the call to action

Limnological monitoring data for Lake Mead during 1988

Limnological monitoring was conducted in Las Vegas Bay and Boulder Basin from April to December of 1988. The purpose of the monitoring was to (i) document possible changes in water quality resulting from decreased phosphorus loading and increased ammonia in Las Vegas Wash, and (ii) establish a data base for evaluating the adequacy of water quality standards

An Energy-Harvesting Railroad Tie for Improving Track\ua0Condition Monitoring and Safety

Researchers at the Railway Technologies Laboratory (RTL) of the Center for Vehicle Systems and Safety (CVeSS) at Virginia Tech have designed and developed an energy harvesting railroad tie, shown in Figure 1, to power trackside electronics and sensors for improving track condition monitoring and safety. As a member of the Rail Transportation Engineering and Advance Maintenance (RailTEAM) consortium led by the University of Nevada Las Vegas (UNLV), RTL is funded by the U.S. Department of Transportation University Transportation Center program. RTL explores technologies that advance railroad sciences and enable the U.S. rail industry to become more efficient and globally competitive. The shortage of electrical power along railroad tracks significantly limits the railroads\u2019 ability to apply intelligent solutions for improving rail safety and connectivity. Much advanced wayside electrical equipment desired by the U.S. railroads cannot be employed readily on tracks due to the absence of electrical power. For example, some railroads use drones as a preferred means of physical inspection of track conditions, but the average maximum battery life for most commercial drones is only 22 to 27 minutes, significantly limit their operational range and length of flight

Validation of a multifactorial risk factor model used for predicting future caries risk with nevada adolescents

<p>Abstract</p> <p>Background</p> <p>The objective of this study was to measure the validity and reliability of a multifactorial Risk Factor Model developed for use in predicting future caries risk in Nevada adolescents in a public health setting.</p> <p>Methods</p> <p>This study examined retrospective data from an oral health surveillance initiative that screened over 51,000 students 13-18 years of age, attending public/private schools in Nevada across six academic years (2002/2003-2007/2008). The Risk Factor Model included ten demographic variables: exposure to fluoridation in the municipal water supply, environmental smoke exposure, race, age, locale (metropolitan vs. rural), tobacco use, Body Mass Index, insurance status, sex, and sealant application. Multiple regression was used in a previous study to establish which significantly contributed to caries risk. Follow-up logistic regression ascertained the weight of contribution and odds ratios of the ten variables. Researchers in this study computed sensitivity, specificity, positive predictive value (PVP), negative predictive value (PVN), and prevalence across all six years of screening to assess the validity of the Risk Factor Model.</p> <p>Results</p> <p>Subjects' overall mean caries prevalence across all six years was 66%. Average sensitivity across all six years was 79%; average specificity was 81%; average PVP was 89% and average PVN was 67%.</p> <p>Conclusions</p> <p>Overall, the Risk Factor Model provided a relatively constant, valid measure of caries that could be used in conjunction with a comprehensive risk assessment in population-based screenings by school nurses/nurse practitioners, health educators, and physicians to guide them in assessing potential future caries risk for use in prevention and referral practices.</p

Performance of Transportation Infrastructure During Kumamoto Earthquakes of April 14 and 16, 2016\u2014 A Reconnaissance Report

DTFH61-07-00031This report described a reconnaissance effort to document bridge performance during the Kumamoto earthquakes in Japan in April 2016. More than 180 bridges were damaged by these earthquakes. Of particular interest is the performance of bridges that were relatively new (15\u201320 yr old) or recently retrofitted. Damage sustained was significant and included bearing and shear key failures, distortion and local buckling of the steel superstructures, and foundation movement. Most of the damage could be attributed to extensive slope failures and intense shaking close to the causative fault. Recommendations for improving bridge performance in future earthquakes are given

Banking laws.

At head of title: State of Nevada.Title varies slightly.Mode of access: Internet.Volume for 1909 issued by the State Banking Board; 1927, by the State Board of Finance.Latest issue consulted: 1933.Description based on: 1909; title from cover