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232 ■ Opening Year Traffic Analysis: Update Mn /DOT 2008 CORSIM model with trip 233 generation from Twin Lakes Development. Conduct a No -Build (no 234 improvements) analysis and a Build (with improvements) analysis. 235 236 3.2 Interstate Access Modification Request 237 WSB contacted Kevin Sommers at Mn /DOT to gather more information regarding the 238 extent of freeway modeling and documentation that will be necessary to complete the 239 recommended improvements at the access ramps. He indicated that an IAR may not be 240 required to receive Mn /DOT and FHWA approvals, as long as the CORSIM modeling 241 indicates that improvements are not necessary on I -35W outside the intersection 242 improvements at the ramp terminal. WSB believes that this can be substantiated 243 through the traffic analysis, which will significantly decrease the time and effort needed 244 to secure approvals for ramp improvements. 245 WSB will prepare an IAR to document the impact of proposed changes to the 246 Cleveland Avenue and I -35W Interchange and obtain FHWA approval. The IAR will 247 document the CORSIM freeway modeling analysis, crash analysis, and other key 248 policy points in accordance to the FHWA guidelines for interstate access approvals. 249 This task will coincide with the CORSIM freeway modeling efforts in terms of 250 coordination and delivery. 251 3.3 Project Memorandum 252 WSB will streamline the environmental documentation by preparing a Project 253 Memorandum (PM) using information gathered by the recently completed AUAR and 254 adhering to Mn /DOT's Highway Project Development Process (HPDP). The PM will 255 serve as the federal environmental analysis and will focus on the impacts and design 256 criteria related to affected areas of I -35W and its access ramps to Cleveland Avenue. 257 WSB will to meet with Mn /DOT early in the process to confirm the documentation 258 requirements and the appropriate approval authorities such as Mn /DOT State Aid 259 and/or Mn /DOT's Office of Environmental Services. WSB has a strong understanding 260 of the state and federal procedural requirements and will use this expertise to expedite 261 federal and state environmental clearances for the proposed improvements. 262 3.4 Staff Approved Layout (30% Design) and Estimate 263 WSB will begin the staff approved layout process by initially meeting with Mn /DOT to 264 establish the appropriate Staff Approved Layout Level for the type of improvements 265 that impact I -35W. It is anticipated that the improvements will be contained to the 266 ramp terminal intersections with Cleveland Avenue, necessitating only Level 2 layout 267 development and approval. A second coordination meeting is anticipated after the 268 improvements are identified from the CORSIM modeling effort. The layout 269 development will occur on a parallel track with other efforts such as other preliminary 270 engineering activities, Project Memorandum, and freeway modeling to minimize 271 schedule impact. 272 3.5 Final Design — 60 % Submittal 273 WSB will prepare 60% drawings for the interchange improvements. As discussed in 274 the approach, these documents will be a portion of the overall project set, but will be 275 submitted independently for Mn /DOT review. 60% shall include all primary design 276 sheets, with the concepts and principles indicated or detailed. Fully developed removal 5