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07/74/2007 15:22 FAX *9085393923 Hatn Hoae Lands-L00 ® )n'-'))3 21ie Honorable Pete goffmnn, Chair And Members o£ the Hawaii County Council J~i].y 24, 2007 Page 2 Clint the development Vill contain its own runoff and lurwcing impermeable surfaces on these areas to no more than forty percent o! the total land area o! any lot or propc~ed new subdivision will increase both the design cost and construction coat for new subdivisions. Ne defer the specific needs and resultant iaipacta of these requirements to tY.e design professionals, but wa are concerned with the addaiona= cost iapacta that will result from this. As written, this section iatplies that a subdivision proposed on terrain axCOOding tea percent will need to contain all of the runoff from the site. we ere concerned that Cris language does not differentiate between the pre-development discharge amount and post-development discharge amount as stated ir. Section 27-4, Item (j). In any event, the enlarged collectior. and con:ninment facilities Co retain a one-hour, 25-year storm event will increase Cris coot of subdivision developtasnt beyond what ie currently required. This will result in less lots per dollars expended, end drastically diminish the rate of affordable housing development. Limiting the ia~ermeebl• surfaces, in subdivisions Dropraed oh terrain exceeding teri percent, to no more than forty percent of the total lend area will impose Iower subdivision QtnSltiea. The forced lower deacitieC will result in tigher per-lot inlYastructure costs. Again, this will reduce the numbor of lore yielded per dollars expended wad decrsaae the amount of affordable homes built each year. Section 27-20, Standards far subdivisions wad other developments: Item {e): Tha requirements of having the lowest 11 oos elevated at least two last above the highest adjacent grade for Zone % Ishaded) and one foot above the highest adjacent grade for Zone % (unshaded) could negatively impact the 8welopment of a subdivision with a significant i:~creaee in the sitework construction cost- On sloping lands whr,ze aria roadway runs perpendicular to the slope and pad-graded ]ota o~_ both sides of the road, the lots on the uphill aide of the road are eypically is cut while the lots on the downhill side of the road are typically in fill- The requirements of having the lowest floor elevated either two or one feet above the highest adjacent grade (dofiaed as the highest r:atura:.