Laserfiche WebLink
Project Approach, Page 13 <br />Project Approach - Section 3 <br />Highway 10 turn lanes. Develop recommendations including subgrade corrections, embankment <br />construction, subsurface drainage, use of on-site materials as base, and other pertinent factors. <br />Phase 12 – Drainage Design <br />Task 1 - Identification and Mapping of Existing Flow Patterns <br />Utilizing topographic data within the project limits and LIDAR data outside of the project limits, perform <br />a desktop analysis of the existing flow patterns and drainage ways. <br />Task 2—Determine Necessary Drainage Features, Stormwater Conveyances <br />Based on the existing flow patterns and roadway design, determine necessary drainage features and <br />stormwater conveyances to maintain drainage characteristics and avoid adverse project impacts. <br />Task 3 - Water Quality and Storm Water Ponding <br />Determine proposed locations of storm water ponding areas and water quality areas (i.e. infiltration <br />basins). Prepare hydraulic and hydrologic models for the pre-project and post-project conditions. Size <br />the storm water treatment areas to prevent adverse impacts to adjacent properties. <br />Task 4 - Water Resources Technical Report <br />Prepare a Stormwater Management Plan for the project complete with a narrative, hydrologic model <br />output, summaries, and water quality data. <br />Phase 13 – Final Design and Construction Plans <br />Task 1 – Existing Utilities Review <br />We will investigate and review the existing data on the storm sewer, water, and sanitary sewer systems. <br />In cooperation with City staff, a final report will be developed to summarize which systems are proposed <br />to be replaced, repaired or protected. This task will include site visits to visually review the existing <br />infrastructure. <br />Task 2 – Stormwater Model <br />The storm water system will be modeled with XP-SWMM, HydroCAD or Autodesk Storm and Sanitary <br />Analysis. The model will define existing and future flow rates, anticipated problem areas, recommended <br />pipe sizes, recommended ponding areas or rain gardens, and recommended future system improvements if <br />applicable. The model will include areas outside the project area that currently drain to the proposed <br />system. <br />Task 3 – Small Utility Notification <br />We will notify and coordinate the project improvements with the utility companies. <br />Task 4 – Value Engineering <br />Review the project to determine possible cost savings such as recycle of bituminous as base material. <br />Task 5 – Confirm Easements <br />Confirm all work is within the easements.