Planning Board minutes 050119 - Laserfiche WebLink

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Approved 7/5/19 affordable housing project viable but this project does focus more on the preservation and protection of the 440 environmental components related to the property, which current policy mandates.441 442 David Blankfard: In the packet on-pages 40 and 41, you have a memo from Mr. Fleming, the stormwater supervisor. 443 Can you explain what his conclusions were? 444 445 Michael Harvey: I can try. I’ll remind you about what I told you last month when the concept plan was reviewed. This446 project will have to go through a stormwater permitting process. The process will have to demonstrate that proposed 447 stormwater facilities will not only comply with our code, but also address nutrient reduction requirements. I think that 448 what Mr. Fleming is attempting to identify is that he would like to see the SCM, stormwater control measure, to 449 accommodate more of the potential development on the housing side not just the roadways and overall land 450 disturbance activity for the project. Mr. Smith has indicated this evening that they are going to be looking at each 451 individual lot in terms of some disconnected stormwater flow feature to address actual on lot development activities,452 so you don’t have to over design the stormwater feature which actually incorporates some of the low impact design 453 elements. This is an attempt to try to address some of the duality of the ordinance with respect to how do we comply 454 with the stormwater standard, and at the same time, how do we achieve reasonable development of property. 455 456 David Blankfard: What I’m understanding is you are going to take care of some of the runoff on the individual pieces 457 of property.458 459 Tim Smith: The ones we can, yes. 460 461 David Blankfard: If you can’t take care of it on the property you’re going to pipe it over to the SCM. 462 463 Tim Smith: Since this letter, we’ve done more in regard to what his concerns were, and we’re headed in the direction 464 that we need to be for the overall project. We’re increasing the size of our primary device areas, so they have more 465 capacity and we’re also incorporating a tiered approach to stormwater to obtain the treatment required for the entire 466 property. 467 468 Michael Harvey: Just to reiterate, Mr. Smith has gone through a rather detailed recitation of the various techniques 469 they’re looking at. As part of your recommendation, you can ask the Board to consider that if they choose to adopt 470 this project, that those suggestions be incorporated in the resolution of approval and that these are the steps that the 471 applicant will take in terms of addressing and incorporation of low impact design elements. This project cannot be a 472 process of low impact design development because it exceeds thresholds. I think it’s perfectly reasonable for this 473 Board to recommend to the County’s Commissioners to consider making that a requirement as part of the resolution 474 of approval if it gets approved. 475 476 Kim Piracci: Even if they build in three, four, different ways to control flooding, it’s still only stormwater 477 measurements of one inch of rainfall in 24 hours. They don’t have to accommodate three inches of rainfall. 478 479 Michael Harvey: No, that’s the minimum base standard as currently contained within the UDO.480 481 Hunter Spitzer: Is that standard set by the state or can we change that? 482 483 Michael Harvey: The State establishes minimum guidelines and requirements. If we choose to be more restrictive we 484 can do that, but the State would have to give us the authorization to do that. If this Board is interested, it could 485 request the County Commissioners to study whether or not there’s an opportunity to implement a higher stormwater 486 management standard that should be adopted recognizing that there are impacts. Of course with more restrictive 487 standards comes higher development costs, which can translate to more expensive homes.488 489 David Blankfard: Tim, if you did treat it more than one inch, what would that impact be on your SCMs?490 491 Tim Smith: It would be bigger SCMs, more disturbance area. We’re trying to do low impact, minimize our 492 disturbance, minimize our impervious areas. We would have to cut more trees and make a bigger space to provide 493 that control. 494