Loading...
R-83-555 - 11/10/1983WHEREAS, 'the City Council deems it desirable to evaluate and study the various watersheds within the City, and WHEREAS, Larry W. Mays has presented the City with a proposal to undertake the study of the watersheds and to provide the City with written reports, and WHEREAS, the City Council wishes to accept Mr. Mays' proposal, Now Therefore BE IT RESOLVED BY THE COUNCIL OF THE CITY OF ROUND ROCK, TEXAS That the City Council hereby accepts the proposal of Larry W. Mays dated November 2, 1983, and hereby agrees to retain Mr. Mays pursuant to said proposal to provide the services outlined therein. RESOLVED this 10th day of Nove ATTEST: RESOLUTION NO LAND, i y Secretary LA"' L. TONN, Mayor City of Round Rock 5/55 LARRY W. MAYS Associate Professor of Civil Engineering College of Engineering The University of Texas at Austin HOME ADDRESS OFFICE ADDRESS 4111 Columbine Drive Austin, Texas 78759 Phone (512) 255 -4763 VITAL STATISTICS Born — Pittsfield, Illinois, February 7, 1948 Health -- Excellent Height -5'9" Weight - -165 lbs. EDUCATION B.S. - University of Missouri at Rolla, 1970. M.S. - University of Missouri at Rolla, 1971. Ph.D. - Civil Engineering, University of Illinois, 1976. REGISTRATION (Registered Professional Engineering) California (No. 23103) Illinois (No. 62- 33714) Texas (No. 42533) Arkansas (No. 5736) Louisiana (No. 20838) Department of Civil Engineering University of Texas at Austin Austin, Texas 78712 Phone (512) 471 -5602 Center for Research in Water Resources Bureau of Engineering Research 10100 Burnet Road Austin, Texas 78758 Phone (512) 835 -3112 MAJOR AREAS OF INTEREST Application of Operations Research to Water Resource Systems Analysis Probability and Statistical Analysis Water Reuse Planning, Optimal Reservoir Operation Optimization and Risk Based Techniques for Design of Hydraulic Flow Systems Water Resources Economics, Open - channel Flow and Urban Hydrology Two Dimensional Models for Backwater Analysis PROFESSIONAL EXPERIENCE Associate Professor, Department of Civil Engineering, The University of Texas, September 1981 - present. Assistant Professor, Department of Civil Engineering, The University of Texas, September 1976 - August 1981. 1 PROFESSIONAL EXPERIENCE (Con't) Visiting Research Assistant Professor, Department of Civil Engineering, University of Illinois, January 1976 - August 1976. Graduate Research Assistant, Department of Civil Engineering, Univer- sity of Illinois, June 1973 - January 1976. Civil Engineer, U.S. Army Engineer (WES) Explosive Excavation Research Lab., Lawrence Livermore Lab., Livermore, California, November 1971 -June 1973. Hydraulics Engineer, Water Resources Division, U.S. Geological Survey, Creve Coeur, Missouri, June 1970 - August 1970. PROFESSIONAL AFFILIATIONS American Geophysical Union American Society of Civil Engineers American Water Resources Association TIMS - The Institute for Management Sciences PROFESSIONAL ACTIVITIES ASCE - Texas Section (Secretary, Vice Chairman, and Chairman of Hydraulics Group), 1977 -1980 Referee for numerous technical journals Committees a) Publications - Water Resource Planning and Management Division, ASCE (1982- present) b) Water Resource Systems - Water Resource Planning and Management Division, ASCE (1982 - present) c) Technical Committee on Probabilistic Approach to Hydraulics, Hydraulics Division, ASCE (1982 - present) HONORS AND BIOGRAPHIES Chi Epsilon Chi Gamma Iota Outstanding Young Men of America Who's Who in the South and Southwest Sigma Xi American Men and Women of Science Dictionary of International Biography Personalities of America Men and Women of Distinction University of Texas Engineering Foundation Award Cockrell Centenial Teaching Fellowship, 1983 RESEARCH GRANTS AND CONTRACTS 1. State Variable Modeling for Urban Water Resource Systems, sponsor- ed by Bureau of Engineering Research, The University of Texas, 9/76 - 5/77. 2. Methodology for Analyzing Effects of Urbanization on Water Resource Systems, sponsored by the Texas Water Resources Institute and OWRT, 1/77 - 9/77. 2 RESEARCH GRANTS AND CONTRACTS (Con't) 3. Development of a Model for Analyzing Storm Sewer Systems on Military Installations, sponsored by the U.S. Army Corps of Engineers, Construction Engineering Research Laboratory, 10/76 - 8/77. 4. Optimal Risk Based Design of Highway Drainage Culverts, sponsored by the Bureau of Engineering Research, The University of Texas, 9/77 - 8/78. 5. Development of a Model for Water and Energy Systems, sponsored by the University Research Institute, The University of Texas, 3/78 - 8/78. 6. OTEC /Mariculture System, Mariculture System Cost Analysis, sponsored by Exxon Enterprises, Inc. with N. Armstrong, R. W. Miksad, and the Port Aransas Marine Science Institute, 3/78 - 12/78. 7. Hydrologic Model Development for Tulsa, Oklahoma, sponsored by the U.S. Army Corps of Engineers, with L. R. Beard, 5/77 -5/78. 8. Optimal Risk Based Design of Water Resources Engineering Projects, sponsored by the National Science Foundation, 4/78 - 9/79. 9. Development of a Model for Planning Optimal Water Reuse, sponsored by the Texas Department of Water Resources, 1/79 - 8/80. 10. Hydraulic Performance of Culverts with Safety Grates, sponsored by the Texas Department of Highways and Public Transportation, 9/79 - 8/81. 11. Development of a Model for Planning Regional Water- Energy Systems, sponsored by Office of Water Research and Technology, 1/80 -6/82. 12. Development of a Model for Planning Optimal Water Reuse, Sponsored by Office of Water Research and Technology, 11/79 - 12/82. 13. Modification of a hydrodynamic Finite Element Model to a User Oriented Program for Two - Dimensional Analysis of Backwater at Bridges, 9/82 -8/83. 14. Development of a Model for the Real -Time Optimal Operation of the Highland Lakes System for Flood Control, Hydroelectric Power Generation, and Water Conservation, sponsored by the Lower Colorado River Authority, 9/83 - 8/85. 3 DATE: November 8, 1983 SUBJECT: Council Agenda, November 10, 1983 ITEM: 3H - Drainage Study Proposal. Resolution 10D on this evening's regular agenda would accept.a.consultant's proposal for services outlined in Phase I below. Attached are copies of the consultant's proposal and partial,resume. OBJECTIVE ROUND ROCK DRAINAGE STUDY Documentation of the most accurate data currently available on stormwater character- istics in the four (4) major drainage basins in the Round Rock area. Utilization of this information to establish regional and local stormwater management policy. PHASE I A) City staff will gather pertinent existing data from governmental and private sectors. B) The City will hire a qualified consultant to evaluate the data gathered in (A) above. The consultant will provide whatever additional data is required in order to create the best possible NEC I and HEC II models. These models will be used in conjunction with the aerial topographical mapping program to evaluate and continually update the regional stormwater situation and its impact on local flood control. This phase could be completed by January 31, 1984. C) The consultant will provide an input deck and sample runs of various stages of build out in each basin. First basin to be completed by December 31, 1983. Authorization and completion of remaining basins contingent upon results of first. PHASE II This phase will consist of policy determination and procedure development based upon conclusions reached in Phase I. The need for engagement of consultant services is anticipated. Since this work is dependent upon Phase I results, no anticipated schedule has been set; however, completion could be expected by fall of 1984. Mr. Jack A. Harzke, P.E. Director of Public Works City of Round Rock 214 E. Main St. Round Rock, Texas 78664 Dear Mr. Harzke: LARRY / MAYS, � P + H.D., P.E. Water Kraourcae Engineer 4111 COLUMBINE DR. AUSTIN, TEXAS 78759 512-255-4763 November 2, 1983 I am writing this letter at your request as a proposal for studies of Lake Creek, Brushy Creek, Chandler Creek and Onion Creek. From discussions with you and Mr. Nuse and after a review of the material you finished at our October 31, 1983 meeting, I now have a general overview of the situation of the watersheds and of what the past studies have done. My understanding is that your greatest need at this time is to have rainfall- runoff models of each of the watersheds so that you can evaluate runoffs for the present condition and for any level of developed or urbanized condition in the future for various storms on the watersheds. In addition you also need backwater analysis models of each of the creeks' portions that drain through Round Rock so that water surface elevations can be determined using various peak discharges for the various watershed conditions. The following is my recommended work task that should be completed for each of the watersheds. 1) Collect all information from the SCS concerning their structures and other sources. Also collect plans for each of the bridge crossings of the creeks from the Texas Department of Highways and Public Transportation. These are usually maintained at the District Office. Obtain soil survey for Williamson County from the County Agricultural Extension. This collection of data has already started by Mr. Nuse and should require little if any of my time. 2) Make a field reconnaissance survey of each watershed to look at each of the major control points such as the SCS reservoir, bridges, confluence of creeks and any other location that may constitute a hydraulic control point. This is required in order to properly divide the watershed down into subareas and determine various runoff and infiltration parameters for the models. LARRY W. MAYS, PH.D., P.E. W ater Kefourcef engineer 4111 COLUMBINE DR. AUSTIN, TEXAS 78759 512 -255 -4763 page 2 3) Divide the watershed into subareas ranging from 0.5 to 1.0 square mile and determine the various runoff, unit hydrograph, and in- filtration parameters for each watershed. This task will also require specifying various engineering parameters to describe each of the existing reservoirs. This task should be performed in conjunction with Mr. Harzke and Mr. Nuse, who are familiar with many of the future changes that are planned for the watersheds. 4) Once the basic engineering data described in Task 3 has been determined, it will be used to develop the input model for the HEC -1 rainfall- runoff model. Once the basic input model of the watershed has been developed, then various rainfall patterns, levels of urbanization, channelization, proposed detention reservoirs, and other watershed modifications can be modeled by making changes to the basic model. The model will be run for several test cases to illustrate the effect of detention reservoirs, various development levels, and other situations as requested by Mr. Harzke and Mr. Nuse. 5) The next task is to develop the input model for the HEC -2 backwater analysis code. A preliminary model can be developed using the cross - section data developed in 1978 by Technic Associates. These cross - sections can be supplemented using data for street crossings and from plan sheets of bridges that should be available from the Texas Department of Highways and Public Transportation. Also the U.S.G.S. topography maps can be used to supplement the cross - section data. The HEC -2 can be updated once the City of Round Rock starts receiving information from their proposed mapping project. A survey could also be con- ducted for creek locations where no data is available. 6) A report will be written for each watershed explaining in detail the models that have been developed. Included will be the models with examples of the output and an explanation of the various parts of the model. A summary of resulting discharge hydrographs for various return periods and various levels of development will be included. Also selected detention reservoirs (chosen with Mr. Harzke and Mr. Nuse's approval) will be modeled to show their effects on the peak discharges that would flow through the City of Round Rock. 7) If requested I can teach Mr. Harzke and /or Mr. Nuse how to use and modify the models, so that in the future they can use the models to analyze various proposed watershed modifications. LARRY W. MAYS, PH.D., P.E. W eiler Keaonrcea engineer 4111 COLUMBINE DR. AUSTIN, TEXAS 78759 512-255-4763 8) I would want to have periodic meetings, probably once every two weeks, to discuss the work with Mr. Harzke and Mr. Muse. This would result in a better work product and would enable both of us to accomplish the final results. As far as budgetary matters are concerned, there are several ways in which this could be accomplished. My preference would be to set up a maximum amount for each watershed of which I would charge an hourly rate of $50.00 plus computer costs. I would bill you on a monthly basis for the time and expenses for the previous month. My estimates for each of the watersheds are: Lake Creek Estimated time (130 hrs at $50.00 /hr) _ $6500.00 Estimated computer costs and supplies = 1000,00 Estimated maximum cost: $7500,00 Brushy Creek Estimated time (130 hrs at $50.00 /hr) _ $6500,00 Estimated computer costs and supplies $1000.00 Estimated maximum cost: $7500,00 Chandler Creek Estimated time (100 hrs at $50.00 /hr) _ $5000,00 Estimated computer costs and supplies = 900.00 Estimated maximum cost: $5900,00 Onion Creek Estimated time ( 80hrs at $50.00 /hr) = $4000.00 Estimated computer costs and supplies = 500,00 Estimated maximum cost: $4500.00 page 3 LARRY / C. MAYS, � P + H.D., P.E. UVaier Keaourcei nSineer 4111 COLUMBINE DR. AUSTIN, TEXAS 78759 512-255-4763 page 4 I would be very interested in developing the models for all the watersheds. You may, however, want me to only model one or two of the watersheds first, so that you can see the type of results an my work product, As far as a time frame to complete t e work, I can most likely complete the first watershed by the latter part of December depending upon when you would approve the work. I have enclosed a copy of my resume for your review. I look forward to working for the City of Round Rock. If there are any clarifications or modifications to this proposed work, please let me know. I look forward to hearing from you. LWM:bb Enclosure Since � Larry Tn�Mays