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GREEN ROADWAY Team 07189 Competition Submittal


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Electronic submittal from the team of Klotz Associates and Clark Condon Associates

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GREEN ROADWAY Team 07189 Competition Submittal

  2. 2. <ul><li>Widen One Mile of </li></ul><ul><li>Independence Parkway to </li></ul><ul><li>a Boulevard Section </li></ul><ul><li>Incorporate Sustainable Design Elements to: </li></ul><ul><ul><li>Reduce Impervious Cover </li></ul></ul><ul><ul><li>Promote Infiltration </li></ul></ul><ul><ul><li>Reduce Storm Water Pollution through Biofiltration </li></ul></ul><ul><ul><li>Reduce Long Term Maintenance Costs </li></ul></ul>DESIGN CHALLENGE
  3. 3. <ul><li>Incorporate LID Techniques to Reduce Carbon Footprint and Lower Costs </li></ul><ul><li>Meet Local Design Criteria </li></ul><ul><li>Post Development Hydrographs Must Indicate Peak Flows Below the Pre-Development Hydrographs for 5-, 10- and 100-year Storm Events </li></ul><ul><li>Remove at Least 80% Total Suspended Solids (TSS) </li></ul><ul><li>Treat the 1-inch Storm Water Quality Volume from the Site </li></ul>DESIGN CRITERIA
  4. 4. OVERVIEW OF DESIGN CONCEPT <ul><li>Maintain Harris County Boulevard Dimensions </li></ul><ul><li>Use Recycled Subgrade and Base </li></ul><ul><li>Use Double Crown to Split Drainage </li></ul><ul><li>Use Curb Cuts to Drain Runoff </li></ul><ul><li>Landscaped Median to Serve as a Bioswale to Remove TSS </li></ul><ul><li>Preserve and Enhance Historical Elements </li></ul>Click HERE for Summary of Design Concept
  5. 5. EXISTING ROADWAY Open Ditch Two 12-foot lanes with 12 foot Shoulders 120-foot ROW
  6. 6. <ul><ul><li>1 ½ inch Asphalt Surface </li></ul></ul><ul><ul><li>6-12 inches of Asphalt Stabilized Base </li></ul></ul><ul><ul><li>6-12 inches of Cement Stabilized Subgrade </li></ul></ul>EXISTING ROADWAY SECTION Click HERE for TxDOT Record Drawings Open Ditch Two 12-foot lanes with 12 foot Shoulders 120-foot ROW
  7. 7. <ul><li>Heavy Industrial Area </li></ul><ul><li>Pipelines and Power Lines Along Roadway </li></ul>Click HERE for Utility Survey ADJACENT PIPELINES/UTILITIES <ul><li>CWA Water Line Adjacent to Project </li></ul><ul><li>Pipeline Crossing Near U-Wood Intersection </li></ul>“ NO UTILITY CONFLICTS IDENTIFIED”
  8. 8. <ul><li>Independence Parkway Leads to San Jacinto Battleground State Park </li></ul><ul><li>The World’s Tallest Monument Tower Honors All Who Fought for Texas’ Independence and Commemorates the Battle of San Jacinto </li></ul>HISTORICAL SIGNIFICANCE
  9. 9. <ul><li>The San Jacinto Monument and the Battleship Texas are in the State Park </li></ul><ul><li>Honoring the History of the Area is a Marketable Priority of the Project </li></ul>HISTORICAL FEATURES
  10. 10. PROJECT STARS <ul><li>Project Stars Emphasizes Historic Significance of the Region </li></ul><ul><li>Project Stars Elements on Independence Parkway Include the Banner Poles and Tank Mural </li></ul><ul><li>Project Stars Elements are Included in the Proposed Design </li></ul><ul><li>Banner Poles Placed at 200-foot Intervals in Median </li></ul><ul><li>Trees Not Planted Near Tank Mural to Allow Clear Viewing </li></ul>
  11. 11. PROPOSED ROADWAY SECTION <ul><li>Four 12-foot Lanes </li></ul><ul><li>20-foot Vegetated Exterior Swales </li></ul><ul><li>32-foot Median Bioswale </li></ul>Click HERE for Harris County Standard Boulevard Detail Vegetated Swale 120-foot ROW Median BioSwale
  12. 12. <ul><ul><li>10-inch Concrete Pavement </li></ul></ul><ul><ul><li>8-inch Recycled Black Base </li></ul></ul><ul><ul><ul><li>30% Recycled Material Allowed per Industry Practices </li></ul></ul></ul><ul><ul><li>8-inch Recycled Cement Stabilized Base </li></ul></ul><ul><ul><ul><li>Existing Subgrade Remixed On-site with 4% Cement </li></ul></ul></ul><ul><ul><ul><li>No New Subgrade Material Required </li></ul></ul></ul>PROPOSED ROADWAY DETAILS
  13. 13. <ul><li>Balances Drainage Between Median and Exterior Swales </li></ul><ul><li>Reduces the Need for Elevation Differences in Flat ROW </li></ul><ul><li>Less Grading and Fill Compared to Standard Section </li></ul>DOUBLE CROWNED PAVEMENT
  14. 14. Independence Parkway PROPOSED PLAN VIEW Inlets 20’ Pervious Pavers Meandering Bioswale Vegetated Exterior Swale Native Trees & Grasses Proposed Pavement Curb Cuts Every 50’ Click HERE for Site & Drainage Plan
  15. 15. <ul><li>6-Foot Curb Cut Section Placed Every 50 Feet </li></ul><ul><li>Curb Cuts Drain to Median Bioswale and Exterior Swales </li></ul><ul><li>Curb Cut Spacing Slows Runoff Velocity </li></ul><ul><li>Pervious Grass Pavers Placed Behind Openings to Prevent Erosion </li></ul>ROADWAY CURB CUTS
  16. 16. <ul><li>Project Drains to Channel 1,400 feet South of Park Road 1836 </li></ul><ul><li>Roadside Swales Will Have Sufficient Capacity to Carry Flow from Adjacent Properties </li></ul>DRAINAGE
  17. 17. <ul><li>Project Modeled Using XP-SWMM </li></ul><ul><ul><li>Used for Accuracy and Dynamic Modeling Capabilities </li></ul></ul><ul><li>Proposed Project’s Hydrograph Beats Existing Hydrographs for the 5-year 10-year and 100-year Events </li></ul><ul><li>Reduced Storm Water Runoff Volume in Peak Flow </li></ul><ul><ul><li>20.5% for 5-year Event </li></ul></ul><ul><ul><li>12.9% for 10-year Event </li></ul></ul><ul><ul><li>12.2% for 100-year Event </li></ul></ul>Click HERE for Existing Hydrograph Click HERE for Proposed Hydrograph Click HERE for XP-SWMM Output DRAINAGE MODELING
  18. 18. <ul><li>Exterior Vegetated Swales Reduce Runoff Velocity and Heat Gain </li></ul><ul><li>Earthen Berm in Exterior Swales Provides Detention for Minor Storm Events </li></ul><ul><li>Bioswales in Median Treat and Convey Runoff from the Inside Two Lanes and Median into Outer Vegetated Swales </li></ul>DRAINAGE PATTERN
  19. 19. <ul><li>Vegetation Reduces TSS </li></ul><ul><li>Meandering Bioswale Improves Aesthetics and Reduces Flow </li></ul><ul><li>Median Bioswale Reduces Required Fill </li></ul>Click HERE for Bioretention Applications BIOSWALES
  20. 20. <ul><li>Raised Grate Inlets in Median Bioswale Allow Infiltration through Soil </li></ul><ul><li>Specialty Grates on Inlets Catch Debris </li></ul><ul><li>Median Inlets Drain to Exterior Vegetated Swales </li></ul>Click HERE for Inlet Detail LID – BIOSWALE INLETS
  21. 21. <ul><li>Existing Clay Soils on Independence Parkway Site are Not Conducive to Infiltration </li></ul><ul><li>Engineered Soils will be Placed Over Filtration Pipe in Bioswale </li></ul><ul><li>In Other Geographic Areas with Different Soils, Infiltration may be used for Water Volume Mitigation </li></ul>LID – SOIL CONDITIONS
  22. 22. <ul><li>Native Plant and Tree Species </li></ul><ul><ul><li>Preserves Historical Accuracy and Aesthetic Appeal of Area </li></ul></ul><ul><ul><li>Reduces Maintenance </li></ul></ul><ul><ul><ul><li>Reduces Mowing </li></ul></ul></ul><ul><ul><ul><li>Reduces Fertilizer/Pesticide </li></ul></ul></ul><ul><ul><li>Promotes Evapotranspiration </li></ul></ul><ul><ul><li>Absorbs Ponding Water </li></ul></ul><ul><ul><li>Provides Erosion Control </li></ul></ul><ul><ul><li>Increases Time of Concentration </li></ul></ul><ul><li>Landscaping to Meet Local Ordinances from Harris County and the Cities of La Porte and Deer Park </li></ul>LID – LANDSCAPE APPROACH
  23. 23. <ul><li>Plantings in Median Meet Harris County Sight Distance and Clear Zone Criteria </li></ul><ul><li>Grass and Flowers Planted from Seed for Ease of Construction and for Cost Effectiveness </li></ul><ul><li>Improved Aesthetics Increase Acceptance by the Public </li></ul><ul><li>Trees Will Not be Planted over Storm Sewer Laterals or over Pipelines </li></ul><ul><li>Ornamental Trees Under 15 feet Tall to be Placed Near Power Lines </li></ul>Click HERE for CenterPoint Planting Guidelines LID – LANDSCAPE APPROACH
  24. 24. LID – LANDSCAPE PLAN <ul><ul><li>Trees and Shrubs </li></ul></ul><ul><ul><ul><li>Bald Cypress </li></ul></ul></ul><ul><ul><ul><li>Dahoon Holly </li></ul></ul></ul><ul><ul><ul><li>Dwarf Palmetto </li></ul></ul></ul><ul><ul><ul><li>Sweet Bay Magnolia </li></ul></ul></ul><ul><ul><ul><li>Water Oak </li></ul></ul></ul><ul><ul><ul><li>Yaupon Holly </li></ul></ul></ul>Trees and Shrubs Wildflowers Tall Grasses Mix 1 Mix 2 <ul><ul><li>Low Grasses Mix 1 </li></ul></ul><ul><ul><ul><li>Knotroot Bristlegrass </li></ul></ul></ul><ul><ul><ul><li>Little Bluestem </li></ul></ul></ul><ul><ul><ul><li>Red Lovegrass </li></ul></ul></ul>Click HERE for Complete Plant List Click HERE for Landscape Plans <ul><ul><li>Tall Grasses </li></ul></ul><ul><ul><ul><li>Big Bluestem </li></ul></ul></ul><ul><ul><ul><li>Brownseed Paspalum </li></ul></ul></ul><ul><ul><ul><li>Bushy Bluestem </li></ul></ul></ul><ul><ul><ul><li>Swamp Milkweed </li></ul></ul></ul><ul><ul><ul><li>Switchgrass </li></ul></ul></ul><ul><ul><li>Low Grasses / Perennial Mix 2 </li></ul></ul><ul><ul><ul><li>Inland Sea Oats </li></ul></ul></ul><ul><ul><ul><li>Spiderwort </li></ul></ul></ul><ul><ul><ul><li>Swamp Sunflower </li></ul></ul></ul><ul><ul><li>Wildflowers </li></ul></ul><ul><ul><ul><li>Blackeyed Susan </li></ul></ul></ul><ul><ul><ul><li>Blanketflower </li></ul></ul></ul><ul><ul><ul><li>Bluebonnet </li></ul></ul></ul>
  25. 25. LID – BEST MANAGEMENT PRACTICES Click HERE for Portions of Pennsylvania BMP Manual Click HERE for EPA BMP for Vegetated Swales <ul><li>46.6% of runoff treated @ 85% by BioSwale & Infiltration Trench </li></ul><ul><li>53.3% of runoff treated @ 81% by Vegetated Swale </li></ul>Best Management Practices % Removal TSS   TP NO 3 Bioswale (PA BMP) 85   85 30 Infiltration Trench (PA BMP) 85   85   30 Vegetated Swale (EPA) 81   9   38 Calculated % Removed for Independence Parkway 84   44   34
  26. 26. HISTORICAL ACCESS <ul><li>Provide Safe Public Access to Historical Marker with a Viewing Area </li></ul><ul><li>Opportunity to Enhance Existing Historical Features </li></ul><ul><li>Increases Marketability of Independence Parkway </li></ul>
  27. 27. <ul><li>LID Elements Include Construction Procedures and Materials </li></ul><ul><li>Reduction of Truck Trips/Hauling </li></ul><ul><ul><li>Recycling Existing Subgrade On-site </li></ul></ul><ul><ul><li>Providing Staging Area for Contractor </li></ul></ul><ul><li>Construction Phased to Minimize Impact to Plant Life and Soil </li></ul><ul><ul><li>Minimize Disturbed </li></ul></ul><ul><ul><li>Area </li></ul></ul><ul><ul><li>Minimize Compaction On-site </li></ul></ul>LID – CONSTRUCTION Click HERE for Portions of Maryland BMP Manual
  28. 28. LID – ROADWAY MAINTENANCE <ul><li>Plant Life Chosen to Minimize Mowing and Fertilization </li></ul><ul><li>Inlet Designed for Debris Removal and Infiltration </li></ul><ul><li>Irrigation Not Required </li></ul><ul><li>Hand Water Trees First Year for Establishment </li></ul><ul><li>Educate the County Staff on Maintenance Requirements to Ensure that the System will Function and Thrive </li></ul>
  29. 29. <ul><li>Conventional Roadway Development Averages Approximately $5 Million per Mile. </li></ul>COST COMPARISON Click HERE for Complete Cost Estimate <ul><li>Proposed Roadway Cost </li></ul>Roadway Costs $3,134,081 Drainage Costs $551,888 LID Costs $550,720 Historical Items $47,000 Total $4,283,689
  30. 30. SUMMARY <ul><li>Cost Effective, Clean, Marketable, Aesthetically Pleasing and Sustainable Team 07189 </li></ul>