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502 , <br /> 503 , <br /> 504 that structure design and placement minimize interference with public river corridor views. <br /> 505 <br /> 506 conditional use according to Section 6.23. <br /> 507 (6) UC District: Height is determined by underlying zoning,provided tiering of structures away <br /> 508 , <br /> 509 to the river and blufflincs,and structure design and placement minimize interference with <br /> 510 <br /> 511 b. Height is measured on the side of the structure facing the Mississippi River. <br /> 512 c. In addition to the,conditional use permit requirements of Section 117-148(c)4,(Conditional and <br /> 513 interim use permits)criteria for considering whether to grant a conditional use permit for <br /> 514 structures exceeding the height limits must include: <br /> 515 (1) Assessment of the visual impact of the proposed structure on public river corridor views, <br /> 516 including views from other communities; <br /> 517 (2) Determination that the proposed structure meets the required bluff and OHWL setbacks; <br /> 518 (3) Identification and application of techniques to minimize the perceived bulk of the proposed <br /> 519 structure,such as: <br /> 520 (i) Placing the long axis of the building perpendicular to the river; <br /> 521 (ii) Stepping back of portions of the facade; <br /> 522 (iii) Lowering the roof pitch or use of a flat roof; <br /> 523 (iv) Using building materials or mitigation techniques that will blend in with the natural <br /> 524 surroundings such as green roofs,green walls,or other green and brown building <br /> 525 materials; <br /> 526 (v) Narrowing the profile of upper floors of the building;or <br /> 527 (vi) Increasing the setbacks of the building from the Mississippi River or blufflines; <br /> 528 (vii) Identification of techniques for preservation of those view corridors identified in the <br /> 529 MRCCA Plan;and <br /> 530 (viii) Opportunities for creation or enhancement of public river corridor views. <br /> 531 3. Structure and impervious surface placement. <br /> 532 a. Structures and impervious surface must not be placed in the shore or bluff impact zones unless <br /> 533 identified as an exemption in Section 117-148(I)(Exemptions). <br /> 534 b. Structures and facilities must comply with the following OHWL setback provisions unless <br /> 535 identified as exempt in Section 117-148(I)(Exemptions). <br /> 536 (1) ROS District:200 feet from the Mississippi River and 150 feet from the Minnesota and <br /> 537 Vermillion Rivers. <br /> 538 (2) RN District: 100 feet from the Mississippi River and 75 feet from the Rum River. <br /> 15 <br />