development shall receiving waters, be transported by minimize vegetated concentrated conveyances to the stormwater flow, maximum extent maximize the use of practicable; sheet flow through (B) High Density Option: vegetated areas, and if new development maximize the flow exceeds the low length through density option vegetated areas; requirements as stated (IV) areas of in SubItem (3)(b)(i)(A) concentrated of this Rule, then development are engineered stormwater located in upland controls must be used areas and away, to control runoff from to the maximum the first inch of extent rainfall; new practicable, from residential and surface waters nonresidential and development shall not drainageways; exceed 30 percent (V) remainder of tract builtupon area; to remain in (C) Land within the vegetated or watershed shall be natural state; deemed compliant with (VI) area in the the density vegetated or requirements if the natural state may following condition is be conveyed to a met: the density of all property owners existing development association, a at the time of local government reclassification does for preservation not exceed the density as a park or requirement when greenway, a densities are averaged conservation throughout the entire organization, or watershed area at the placed in a time of classification; permanent (D) Cluster development is conservation or allowed on a farmland projectbyproject basis preservation as follows: easement; (I) overall density of the (VII) a maintenance project meets agreement for the associated density or vegetated or stormwater control natural area shall requirements of this be filed with the Rule; Register of (II) buffers meet the Deeds; and minimum statewide (VIII) cluster water supply development that watershed protection meets the requirements; applicable low (III) builtupon areas are density option designed and located requirements to minimize shall transport stormwater runoff stormwater impact to the runoff from the
development shall be transported by vegetated conveyances to the maximum extent practicable; (B) High Density Option: if new development exceeds the low density option requirements as stated in SubItem (3)(b)(i)(A) of this Rule, then engineered stormwater controls must be used to control runoff from the first inch of rainfall; new residential and nonresidential development shall not exceed 30 percent builtupon area; (C) Land within the watershed shall be deemed compliant with the density requirements if the following condition is met: the density of all existing development at the time of reclassification does not exceed the density requirement when densities are averaged throughout the entire watershed area at the time of classification; (D) Cluster development is allowed on a projectbyproject basis as follows: (I) overall density of the project meets associated density or stormwater control requirements of this Rule; (II) buffers meet the minimum statewide water supply watershed protection requirements; (III) builtupon areas are designed and located to minimize stormwater runoff impact to the receiving waters, minimize concentrated stormwater flow, maximize the use of sheet flow through vegetated areas, and maximize the flow length through vegetated areas; (IV) areas of concentrated development are located in upland areas and away, to the maximum extent practicable, from surface waters and drainageways; (V) remainder of tract to remain in vegetated or natural state; (VI) area in the vegetated or natural state may be conveyed to a property owners association, a local government for preservation as a park or greenway, a conservation organization, or placed in a permanent conservation or farmland preservation easement; (VII) a maintenance agreement for the vegetated or natural area shall be filed with the Register of Deeds; and (VIII) cluster development that meets the applicable low density option requirements shall transport stormwater runoff from the