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Home My WebLink AboutC2006-252 - 6/27/2006 - Approved AGREEMENT fHIS AGREEMENT (the "Agreement") is made and entered this -z, ~day of , :2006 (the "Effective Date"), by and between CITY OF CORPUS CD TI ("CITY") and COASTAL BEND BAYS & ESTUARIES PROGRAM, INC. ("CBBEP"), a non-protit corporation organized and existing under the laws of the State of Texas (individually "P<!!!y" and together ("Parties"). WITNESSETH: WHEREAS, as part of CITY's commitment to the U.S. Army Corps of Engineers for the Nueces River Basin Feasibility Study, CITY desires to have developed a Digital Elevation Model of the Nueces River Delta, and; WHEREAS, CITY's Agreed Order with the Texas Commission on Environmental Quality (TCEQ) commits CIT'{ to construct a water diversion pipeline from above the salt water barrier directly to Rincon Bayou for, among other things, the restoration and enhancement of freshwater and brackish wetlands in the Nueces River Delta, and; WHEREAS, CBBEP has acquired more than 5,343 acres of wetlands and associated wildlife habitat in the Nueces River Delta for protection and restoration, and; WHEREAS, CBBEP has received and shared with CITY a proposal submitted by the University of Texas - Bureau of Economic Geology (UTBEG) dated December 20, 2005 (Attachment A) for the development of a Digital Elevation Model utilizing LIDAR technology and a bathymetric survey of areas not covered by LIDAR for a total cost of One Hundred Forty-Three Thousand Seven Hundred and Eighteen Dollars ($143,718), and; WHEREAS, CBBEP and CITY desire to set out a definitive understanding concerning the development of a Digital Elevation Model of the Nueces River Delta. NOW THEREFORE. for and in consideration ofTen and No/lOO Dollars ($10.00) and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged and confessed, CBBEP and CITY, intending to be and being legally bound, do herehy agree as follows: 1. CITY Fundim!. The sum One Hundred Twenty Thousand Seven Hundred and Thirty- Three Dollars and Zero Cents ($120.733.00) is the total fee to be paid by CITY to CBBEP as full consideration ofCITY's obligation under the terms of the Agreement. 2. CITY Payment. The CITY shall pay to CBBEP the agreed upon amount within 30 days of the date of execution of this agreement. 2006-252 06/27/06 M2006-184 CBBEP ~,.'''' 3. CBBEP Fundine:. The sum of Twenty- Two Thousand Nine Hundred and Eighty-Five Dollars and Zero Cents ($22,985.00) is the total amount to be contributed by CBBEP as full consideration of CBBEP's funding obligation under the terms of the Agreement. 4. CBBEP Oblie:ations. CBBEP shall be obligated to contract with and make payments to UTBEG for the completion of a Digital Elevation Model in accordance with the funding provided. The CBBEP will provide copies of all reports and digital information to CITY delivered by UTBEG in compliance with the terms of the contract between CBBEP and UTBEG.. The CBBEP is not obligated to perform any other actions. 5. Indemnification. CBBEP HEREBY BINDS ITSELF, ITS SUCCESSORS, ASSIGNS, AGENTS, AND LICENSEES TO INDEMNIFY AND HOLD HARMLESS CITY FROM AND AGAINST ANY AND ALL CLAIMS, ACTIONS, CAUSES OF ACTION, DEMANDS, LIABILITIES, COSTS, LOSSES, EXPENSES, AND DAMAGES, IN CONTRACT, STRICT LIABILITY, OR IN TORT, FOR INJURY TO ANY PERSON (INCLUDING DEATH) OR DAMAGE TO ANY PROPERTY ARISING OUT OF OR IN ANY WAY CONNECTED WITH IMPLEMENT A nON OF THIS AGREEMENT, WHERE SUCH INJURY OR DAMAGE IS CAUSED BY THE SOLE, JOINT, CONCURRENT, CONTRIBUTING OR COMPARATIVE NEGLIGENCE OR F AUL T OF CBBEP, ITS AGENTS OR EMPLOYEES. 6. Governine: Law. f'his Agreement is declared to be a Texas contract, and all of the terms hereof shall be constmed according to the laws of the State of Texas. 7. Notices. All notices, demands, requests and other communications required or permitted to be given or made upon either Party shall be in writing, shall be deemed to be given for purposes of this Agreement on the date such writing is received by the intended recipient thereof. and shall be delivered personally, by registered or certified mail (postage prepaid), reliable overnight delivery service (fees prepaid), facsimile. or other electronic means, acceptable to the Party receiving same. addressed to the Party to whom such notice is directed: [1' to Cay: City of C;)orpus Christi " Attn: t)f!OI-1.t Ie. tvo--e. P.O. Box 927 Corpus Christi. Texas 78469-9277 Telephone: (36]) ~L~ 3~o Facsimile: (36]) fl{, - '1 Y31 E-Mail: '1~r~.....) &0.( ~'(~1l ......""""""' If to CBBEP' Coastal Bend Bays & Estuaries Program Attn: Ray Allen 1305 North Shoreline Boulevard, Suite 205 Corpus Christi, TX 78401 Telephone: (361) 885-6204 Facsimile: (361) 880-6198 E-Mail: rallen(a)cbbep.org 8. Entire Ae:reement. This Agreement constitutes the entire agreement between the parties hereto and no further modification of the Agreement shall be binding unless evidenced by an agreement in writing signed by CITY and CBBEP. In the event the parties agree that additional tasks and/or funds are required for the completion of the development of the Digital Elevation Model, the parties shall execute a written amendment to this Agreement. EXECUTED as of the Effective Date set forth above. City of Corpus Christi A~r' '~~ d.~ilOO 0<t<P, . ~.1 r' :';:::;lETi\;iY -- By: illJ.-a l~~.:J.~Y--T AU1~Ot(~LL. If CA1ur.CH .__~/.l:J~P..L /tl .............--.............. SEctn Atv ()1...- Title: -~ Name: Coastal Bend Bays & Estuaries Program, Inc., a non-profit co . on under t s of the State of Texas ;7itq~ ~ A ~~1!' /,'. '. .) l(4y /YtJ.-,?tJu\ ri~ /ltiJt{J~ By: 1 S~ 1J//eAJ &€'cvh~ ~,fe~ Name: Title: (Remainder of page intentionally left blank) Digital Elevation Model of the Nueces Delta Proposal prepared by the Bureau of Economic Geology: December 20, 2005 Overview The Bureau of Economic Geology (BEG) at the University of Texas at Austin (UT) proposes to use airborne lidar (light detection and ranging) and shallow-water echo sounding to provide terrain elevation data of approximately 1000 ha of wetlands, ponds, and adjacent uplands on the Nueces River Delta, Texas (fig. 1). The objective of this collaborative research effort between UT's Marine Science Institute (MSI) and the BEG will be to develop a research-quality digital elevation model that will be used to (1) better understand how vegetation assemblages are correlated with elevation, (2) map habitats in conjunction with aerial photography, and (3) design freshwater diversion projects. In addition to acquisition of conventional first and last return lidar data, which will be used to create the OEM's, we will acquire experimental wave-form data. The acquisition of wave form data will not add additional cost to this project and the BEG will seek other funding to process and analyze these data on an experimental basis. . .,~~~.~\.;~;f. j.:: _~>.~~;;;;. i' r' , / " j i , f .- . -; .--.1 ! ) i i ; ,/ -~.. / / H'-i . : I --,;....1-,.. . Figure 1. Proposed approximate survey area. Methodology This section describes the work necessary to acquire digital terrain data and to produce research-quality OEM's.. The lidar instrument is optimized for terrain, but it will not penetrate water, therefore. we will use an echosounder and geodetic GPS to '~'-+"!IlII" acquire elevations of the major ponds and tidal channels interior to the delta. The lidar survey will take place during February, which is typically a period of low water level on the delta and in the bay. The bathymetric survey will take place in Mayor June, which is when high water levels tend to occur. Airborne Lidar Survey Lidar equipment and data collection. The BEG will conduct the lidar survey using their Optech Inc. Airborne Laser Terrain Mapping (AL TM) 1225 system. We propose to fly parallel northwest-southeast flightlines with nominal 60% overlap to provide complete coverage of the area shown in fig. 1. The AL TM 1225 will be operated using the following parameters: . Survey altitude no greater than 2,500 feet above ground level (AGL) . Aircraft ground speed of 95-105 knots to ensure close scan line spacing . 25kHz lidar pulse repetition rate . 26Hz scanning frequency . J:20 0 scan angle for a maximum lidar swath width of 2, OOOft at 2, 500ft AGL. During each flight, lidar data will be acquired over a calibration target. This target will be a hard surface. such as a road, that we have surveyed on the ground using a kinematic GPS technique. The aeriallidar survey portion of the project area will require approximately three days using the parameters described above. Aircrafi The AL TM will be installed in a single-engine Cessna Stationaire 206 fixed- wing aircraft owned and operated by the Texas Department of Transportation. Global Positioning System (GPS) equipment and data collection. The aircraft will be equipped with two GPS systems. A real-time differential GPS (DGPS) system will provide navigation information along pre-planned flightlines. A dual frequency, geodetic- quality Ashtech Z-12 GPS receiver will also be mounted in the aircraft. Two additional Ashtech Z-12 receivers will function as ground GPS base stations for post-processing differentially corrected GPS aircraft trajectories. The air and ground Ashtech GPS receivers will record at a I-Hz data rate. The GPS base stations will be located so that the GPS baseline lengths to the survey aircraft will not exceed approximately 15.5 mi (25 km). The GPS base stations will have a clear view of the sky 1 O-degrees above the horizon and be free of electromagnetic interference. GPS ground control data reconnaissance will be performed by BEG with the assistance of MSI personnel. Data Processing. Lidar and GPS data will be downloaded, checked for completeness, and archived on a daily basis. Prior to generation of aerially extensive point data files, sample areas will be processed to estimate lidar calibration parameters. The GPS aircraft trajectories, IMU, and lidar-range information will then be merged to create X, ~ Z point files for the entire area. We will calibrate the data by analyzing lidar measurements of the calibration target. This calibration will include estimation of roll and pitch biases, scanner scale error, and biases in the two Timing Interval Meters (TIM1 and TIM2) used to measure the ranges of the first and last lidar returns. We will compute GPS phase solutions for the aircraft trajectories and for any temporary geodetic ground control in the International Terrestrial Reference Frame 2000 (ITRFOO). GPS positions will then be transformed into North American Datum of 1983 (NAD83) using National Geodetic Survey HTDP (Horizontal Time-Dependent Positioning) software. The ground-truth assessment of the lidar data will be accomplished by comparing the lidar data to unambiguous surfaces and features (e.g., roads) surveyed on the ground using kinematic and rapid-static GPS techniques. In addition, BEG, with the assistance of MSI personnel, will measure the elevations of select points in a variety of delta environments and compare them to the lidar OEM. If necessary, we will install and survey temporary monuments on the delta from which we will measure topographic transects for comparison with the lidar. Echosounder Survey A 200 kHz Knudsen Series 320M precision surveying echo sounder will be used for the bathymetric survey. This echosounder is single beam and optimized for shallow water which is what we will encounter on the delta. The system will be mounted on an airboat operated by UT-MSI. The x, y, z position of the echosounder's transducer will be determined for each sounding using geodetic GPS receivers on the boat and at a reference point and kinematic GPS processing techniques similar to what is described for the aircraft trajectory. Processing of the data will involve determining the trajectory of the transducer from the GPS data and combining this information with ranges (depth data) from the echosounder to yield the x, y, z location of the bottom. Survey lines will be spaced to adequately characterize the pond and creek bottoms in consultation with UT- MSI researchers. We may also conduct wading profiles to ensure lidar/echosounder overlap in select areas. We expect it will take 5 to 10 days to acquire the necessary bathymetric data. but the survey will not be designed until the results of the lidar survey are known. Digital Elevation Model and Transformation to orthometric heights A digital elevation model that combines lidar and echosounder data will be constructed, DEM node spacing wi 11 be 1 m. The survey is designed so that there will be areas of overlap with the lidar and echo sounder data. This will facilitate combining the data sets into a common OEM. The DEM will be transformed so that heights are relative to the North American Vertical Datum of 1988 (NA VD88). Lidar elevations are GPS-derived heights above the reference ellipsoid (HAE). Orthometric heights (H) are referenced to the geoid, an equipotential reference surface. At the same point on the surface of the earth, the difference between an ellipsoid height and an orthometric height is defined as the geoid height (N). We will transform the lidar HAE into orthometric heights using a high-resolution Corpus Christi geoid model developed by UT-Dallas, Texas A&M Corpus Christi, and BEG and then correct the geoid-adjusted lidar data set to conform to the NA VD88 datum. This correction to NA VD88 requires comparing the GPS-derived orthometric heights to NA VD88 benchmarks and estimating tilts or scale errors. Accuracy and Detail The lidar survey is designed to yield an average of 2 data points per square meter with a horizontal accuracy of 0.5 m. Vertical accuracy on unambiguous, barren surfaces will be within 0.15 m (RMS) and likely within 0.10 m. Our experience acquiring and analyzing lidar data in Texas coastal wetland environments has shown us the importance of flying with a large amount of overlap (60%) so that each location is acquired twice. This improves coverage of the surfaces of extremely smooth water and low flats and increases the probability that a laser shot will reach the substrate below vegetation. Wetland vegetation will, however, decrease the vertical accuracy of the substrate elevations. In a survey of estuarine wetlands on Matagorda Island, we measured a lidar data bias of 0.1 to 0.2 m above the substrate in a low marsh with 0.3-m high Balis maritime, which formed a dense ground cover (fig. 2). We can also expect wetland vegetation to increase the vertical scatter of the lidar data by as much as 0.1 m. Even with these accuracy limitations, however, we have shown the usefulness of using lidar to correlate wetland types and elevation across broad areas on the upper Texas coast. We are using these relationships to develop inundation models showing the effects of relative sea-level rise on wetlands. Scatter in the Iidar point data and information contained in the wave forms can be exploited for characterizing vegetation and detecting the substrate, and we will seek other funding to do this. The echosounder data will have high detail along survey lines (<1 m spacing), but survey lines will be spaced 10's of meters apart depending on the bathymetry. Spacing and orientation of survey lines will be designed to capture the major variation of the bottom. The accuracy of individual soundings will be within 0.10 m, but there will be less certainty in the DEM because of the interpolation required between survey lines. .......'.."...... MAI01 Matagorda Island June 4 2002 o Lidar Last Return G ro und-based Profile Vegetation He ight c o .~ > Cl) w -0 4 subtidal pond I ,fertical exaggeration 501 -0 8 i ' I ,. I ~ -50 I o I 50 I 100 San A ntonio Bay I I I 150 200 250 .200 -150 100 Distanc e from M 0 nu ment (m) Figure 2. Ground-surveyed substrate and vegetation height compared with lidar points relative to mean sea level. Oeliverables The deliverables from this project will include: . Results of lidar instrument calibration and verification using ground-truth GPS survey data. These will provide an assessment of the limits of lidar data accuracy. . Results of comparisons of the lidar DEM with elevations measured on the ground in various environments. Ground survey data and information on the environments from which it is collected will be provided. . The all-points lidar x,y,z points will be provided in an ASCII file format and parsed into "tiles" covering USGS 7-1/2-minute quarter quadrangles. . x, y. z echosounder point file. . Combined lidar/echosounder (DEM) with metadata in a format compatible with ArcView/ ArcInfo or other. specified GIS-software. . Sample experimental wave-form data. Data will be delivered In UTM zone 14, meters relative to the NAD83 horizontal datum and the NGVD88 vertical datum. The lidar data will meet the accuracy requirements in the Geospatial Positioning Accuracy Standards. Part 3. Schedule 2006 January/February: ground reconnaissance for GPS base stations and calibration sites February: Acquire lidar data March: Preliminary lidar data processing. March: Ground survey of select locations in various environments April/May/June: Process lidar data and evaluate quality May/June: Conduct echosounder survey July/August: Construct combined lidar/echosounder DEM ~.....,.... August 31: Deliverables due. .......'..,~""", Echosounder Lidar Survey Survey TOTAL Sa_Ies and Wages Effort Months Echosounder Lidar James C Gibeaut 1 50 0.50 10,305 3,435 13,740 Research Associate Roberto Gutierrez ) 50 1.50 3,092 9,276 12,368 Research Associate Ian Duncan ) 05 0.05 420 420 840 Assoc Director Rebecca Smyth ) 00 0.30 0 1,677 1,677 Research Associate Tiffany Hepner 100 1.20 4,240 5,088 9,328 Research Associate John Andrews :) 50 0.25 2,408 1,204 3,612 Computer Technician Unnamed 100 000 3,586 0 3,586 GRA Unnamec :) 00 050 0 898 898 Field Technician Unnamed ) 13 0.25 456 877 1,333 Graphics Illustrator Unnamea 013 013 452 452 904 Editor Subtotal Salaries and Wages 24,959 23,327 48,286 Fringe Benefits 7,987 7,465 15,452 Administrative Costs 7,357 8,373 15,730 Tuition 500 0 500 Maetrials and Services Expendable Supplies 100 50 150 Report production, photocopying, reproduction costs 300 0 300 Survey Equip, Support 1,000 100 1,100 cell phones, long distance 100 100 200 Aircraft services 0 11,945 11,945 Aircraft hanger/supplies @ $30/day 0 150 150 Airboat usage@ $110/day 1,100 0 1,100 Airboat fuei @ $50/day 500 0 500 Subtotal Materials and Services 3,100 12,345 15,445 L1DAR Instrument Usage (@ $8000/day) 0 16,000 16,000 Computer Time Charges 2,850 2,580 5,430 Windows NT workstation @ $300imo Unix Workstation @ $1500/mo T nwel Austin - Port Aransas, 2 trips. 3 people, 6 days Per diem @ $1251day 4,500 0 4,500 BEG vehicle mileage @ $A05/mile 689 0 689 L1DAR Reconnaissance Per diem 0 726 726 BEG vehicle 0 182 182 L1DAR survey Per diem 0 2,420 2,420 BEG vehicle 0 608 608 GPS survey Per diem 0 726 726 BEG vehicle 0 365 365 Subtotal Travel 5,189 5,027 10,216 Total Direct Cost 51,942 75,117 127,059 Indirect Cost (15% of MTDC) 7,791 8,868 16,659 TOTAL $59,733 $83,985 $143,718 ....'...,'~