City of Houston : TXDOT : Intercontinental Airport : Hardy Toll Road : White Oak
Grounds Anderson, LLC has prepared Construction Documents for public utilities including water lines, storm sewer lines and outfalls, open channels, sanitary sewer lines and street improvements such as left-turn lanes and traffic control plans for improvements in the public ROW. We have prepared detailed plans including Plan and Profile Drawings, Specifications, and Permit Applications.
We have prepared impact analysis for City of Houston water line crossings of HCFCD channels; Harris County street improvements; Drainage Impact Analysis for HCTRA; a Benchmark Control Network for the City of Sugar Land; and participated in the Master Drainage Plan at Bush-Intercontinental Airport.
Hydraulic Impact Analyses for Waterline Crossings, City of Houston, Texas
The City of Houston Department of Public Works and Engineering proposed Water Line Replacements and Pipe Support Structures at seven (7) locations around the City including W140-06-00 at Long Point (Location B), P125-00-00 at Little York (Location D), and D115-00-00 at Beechnut (Location G). These three locations cross Harris County Flood Control District Rights-of Way. Grounds Anderson developed HEC-RAS Hydraulic (HEC-RAS) models to determine the impact of the proposed replacements of the existing waterlines on the 1% (100-year) water surface elevations of the streams. These models compared the existing and proposed waterlines and support structures for the Effective Flood Insurance Study and the Preliminary (TSARP) study 1% discharges.
Texas Department of Transportation Outfall Tracking System (OTS) Implementation – State of Texas
As a subcontractor to PBS&J, Grounds Anderson prepared the OTS End User’s Manual, Volume I – End User Documentation which contained documentation for the entire OTS software application including detailed sections for each functional component. We documented the following components of the Data Manager functionality including searching for outfalls and crossing points, reporting, OFDC upload, Laboratory data upload, Desktop mapping data upload, Hydrology data upload, Geodatabase domain update and Data manager change tracking. We also detailed how to use the Map Viewer tool including GIS functions to generate maps and ways to find outfall data graphically. Grounds Anderson was also responsible for testing for Quality Assurance/Quality Control (QA/QC) for various applications of the OTS website. The Desktop Mapping Application allows users the ability to upload and append Geodatabase records which will be automatically symbolized in the Map Viewer and uploads data collected during desktop mapping to the master OTS Geodatabase. The Hydrology Upload Function was also tested. This web-based function allows users to upload non-spatial files of hydrology flow data by outfall, crossing point and specific peak flow estimates associated with defined rain event sizes to the OTS website. Once the data is uploaded users can also append the hydrologic data. The Laboratory Upload Function was tested to ensure that non-spatial laboratory data associated with field data collection could be properly uploaded into the master OTS Geodatabase and appended by the user. The Geodatabase Domain Update Application was tested in an ArcSDE environment. This application allows authorized users an automated method for updating the Master OTS Geodatabase domain tables and the OTS “D” tables simultaneously during update and maintenance operations. The Data Manager Change Tracking Function was tested to ensure that all changes to the OTS Geodatabase and properly recorded. This function will assist with regulatory compliance and provide security against unauthorized data modifications. Modifications were made to the OTS Geodatabase records and the change tracking logs and notifications were carefully examined to ensure that everything was recording properly.
Drainage Master Plan and Storm Water Quality Master Plan Update, George Bush Intercontinental Airport
As a subcontractor to S&B Infrastructure, Inc. John served as the Deputy Project Manager for the development of the master plans at Bush Intercontinental Airport. The master plan recommended proposed improvements, alternatives to the drainage system, and Best Management Practices to improve water quality for phased development through 2025. Runoff conditions from the existing 10,000 acres of development were determined so that mitigation of runoff from the proposed 14,000 acre airport could be implemented. The master plan included on and off-site improvements to channels, structures, detention ponds, and water quality features. Unique tasks performed by Grounds Anderson, LLC include a FEMA Letter of Map Revision of the entire Garners Bayou Watershed to update Flood Insurance Rate Maps for improvements within the airport and an offsite diversion to Kenswick Ditch; development of a datum adjustment to correct channel and structure geometries for subsidence; creation of a wildlife buffer map to identify areas of potentially increased bird strikes from existing and proposed detention ponds; and coordination with the Harris County Flood Control District.
Hardy Toll Road Drainage Study
Grounds Anderson analyzed the Hardy Toll Road impacts on Melrose Park and Hawthorne Place subdivisions and the tributaries that ultimately outfall into Halls Bayou (P118-00-00). We prepared hydrologic and hydraulic models to determine the impacts of the construction of the Hardy Toll Road on the existing unstudied channels within Melrose Park and Hawthorne Place subdivisions. We presented updated existing condition hydrologic run-off analysis and hydraulic analysis.
E101-14-00 – Tributary to White Oak Bayou HCFCD Maintenance Project
Grounds Anderson prepared a hydrologic, hydraulic, and detention analysis in support of the Preliminary Engineering Report (PER) for the Harris County Flood Control District, Maintenance Engineering Department. We updated existing condition hydrologic run-off analysis and hydraulic analysis, proposed channel improvement hydrologic and hydraulic analysis, and detention basin sizing for increase runoff. This analysis also includes the sizing of a detention basin at the confluence with Little White Oak Bayou to mitigate increased runoff from increased conveyance and loss of channel storage from proposed improvements to the channel reach.