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Home My WebLink AboutMLA16-00029 - FPA16-00002 Jablonski Stormwater Calculation Worksheet7�'' w�sox coo DEPARTMENT OF COMMUNITY DEVELOP , 4 621 Sheridan Sneer, Poo Townsend, WA 98368 �� '� Tet. 360979.4450 i Fax; 360}79.4451 K MAR 2 4 2n t��au cLI�Effer<nn �s/�nm„nog�a�,-eln� { � �� $ e -,nae; ardQc..,,ff nQE ;J L 9,pNI x Gq� DEFT frf rn"r�'l r! _ STORMWATER CALCULATION WORKSHEET MIA, MIN -COO L- —ER/APPLICANT NAME: tV_AB _Pii,)W 4V -U -333019 - DETERMINING STORMWATER MANAGEMENT REQUIREMENTS: This stormwater calculation worksheet should be completed first to classify the proposal as "small," "medium," or "large." The size determines whether a Stormwater Site Plan is required in conjunction with a stand-alone stormwater management permit application, building permit application, or other land use approval application that involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan, if reauired. PARCEL SIZE (I.E., SITEI Size of parcel 5'0 acres An acre contains 43,560 square feel. Multiply the acreage by this figure. Size of parcel in square feet 217800 sq/ft Land -disturbing activity is any activity that results in movement of earth, or a change in the existing soil cover (both vegetative and non -vegetative)and/or the existing soil topography. Land disturbing activities include, but are not limited to clearing, grading, filling, excavation, and compaction associated with stabilization of structures and road construction. Native vegetation is vegetation comprised on plant species, other than noxious weeds, that are indigenous to the coastal region of the Pacific Northwest and which reasonably could have been expected to naturally occur on the site. Examples include species such as Douglas fir, western hemlock, western red cedar, alder, big -leaf maple, and vine maple; shrubs such as willow, elderberry, salmonberry, and salal; herbaceous plants such as sword fern, foam flower, and fireweed. LAND DISTURBING ACTIVITY CONVERSION OF NATIVE VEGETATION. AND VOLUME OF CUT/FILL Calculate the total area to be cleared, graded, filled, excavated, and/or compacted for proposed development project Include in this calculation the area to be cleared for: Construction site for structures 4100 sq/ft Drainfield, septic tank, etc. 200 sq/ft Well, utilities, etc. sq/ft Driveway, parking, roads, etc. 24550 sq/ft Lawn, landscaping, etc. �( sq/ft dr Other compacted surface, etc. P ft Oma, Total Land Disturbance 6 O N�r 0110 sq/ft Answer the following two questions related to conversion of native vegetation: Does the project convert % acres or more of native vegetation to lawn or landscaped areas? Cirde'. Yes No /a'� Does the project convert 2 % acres or more of native vegetation to pasture? {� Circle: Yes Indicate Total Volumes of Proposed: Cut 0 Fill 0 (cu/yd) Impervious surJoce is a hard surface that either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development. A hard surface area which causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to rooftops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. Wog Wrcacwwu -rev. iorznrmra The following questions will help determine whether the proposed project is considered development or redevelopment. DEVELOPMENTv.REDEVELOPMENT Divide the total existing impervious surface above by the size of the parcel and convert to a percentage: 3 Does the site have 35% or more of existing impervious surface? Circle: yes D No Z FURTHER INSTRUCTIONS: If the answer is yes, the proposal is considered redevelopment and the attached Figure 2 should be used to determine the applicable Minimum Requirements. If the answer is no, the proposal is considered new development and the attached Figure 1 should be used. At this juncture, the applicant should refer to the applicable Flow Chart to determine the Minimum Requirements for stormwater management. DCD staffwill help verify the classification of the project and the application requirements. For proponents of "small" projects who must comply only with Minimum Requirement 412—Construction Stormwater Pollution Prevention—an additional submittal is not required. The proponent is responsible for employing the 12 Elements to control erosion and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet. Proponents of "medium' projects—those that must meet only Minimum Requirements #1 through 115—and for "large" projects—those that must meet all 10 Minimum Requirements—are required to submit a Stormwater Site Plan. DCD has prepared a submittal template of a Stormwater Site Plan, principally for rural residential projects. Complete the template in the Stormwater Site Plan Instructions and Submittal Template or prepare a Stormwater Site Plan using the step-by-step guidance in the Stormwater Management Manual. APPLICANT SIGNATURE -- -- ,\ L�% By signing the Stormwater Calculation worksheet, l as the applicant/owner attest that the information provided herein is tmeand correct to the li best of my knowledge. I also certify that t is application is being made with the full knowledge and consent of all owners of the affected property. MAR ! Q ISI 3/19/2016 �_J IusoowxER OR Aura Or ,c RerafRservTA.rcesw ma 0"o "T .m,n w icma rhea-aav usavata STORMWATER CALULATIONS — IMPERVIOUS SURFACE NEW EXISTING Structures (all roof area)3600 sq/ft Structures (all roof area) 0 sq/ft Sidewalks 0 sq/ft Sidewalks 0 sq/ft Patios 300 sq/ft Patios 0 sq/ft Solid Decks 0 sq/ft Solid Decks 0 sq/ft (without infiltration below) (without infiltration below) 1600 650 Driveway, packing, roads, etc cleft Driveway, packing, roads, etc sq/ft Other 0 sq/ft Other 0 sq/ft Total New 5900 sqf t Total Existing 650 sgHt 6550 TOTAL NEW+ TOTAL EXISTING' sgHt 'This amount will be used to check total lot coverage. The following questions will help determine whether the proposed project is considered development or redevelopment. DEVELOPMENTv.REDEVELOPMENT Divide the total existing impervious surface above by the size of the parcel and convert to a percentage: 3 Does the site have 35% or more of existing impervious surface? Circle: yes D No Z FURTHER INSTRUCTIONS: If the answer is yes, the proposal is considered redevelopment and the attached Figure 2 should be used to determine the applicable Minimum Requirements. If the answer is no, the proposal is considered new development and the attached Figure 1 should be used. At this juncture, the applicant should refer to the applicable Flow Chart to determine the Minimum Requirements for stormwater management. DCD staffwill help verify the classification of the project and the application requirements. For proponents of "small" projects who must comply only with Minimum Requirement 412—Construction Stormwater Pollution Prevention—an additional submittal is not required. The proponent is responsible for employing the 12 Elements to control erosion and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the Construction Stormwater Pollution Prevention (SWPP) Best Management Practices (BMPs) Packet. Proponents of "medium' projects—those that must meet only Minimum Requirements #1 through 115—and for "large" projects—those that must meet all 10 Minimum Requirements—are required to submit a Stormwater Site Plan. DCD has prepared a submittal template of a Stormwater Site Plan, principally for rural residential projects. Complete the template in the Stormwater Site Plan Instructions and Submittal Template or prepare a Stormwater Site Plan using the step-by-step guidance in the Stormwater Management Manual. APPLICANT SIGNATURE -- -- ,\ L�% By signing the Stormwater Calculation worksheet, l as the applicant/owner attest that the information provided herein is tmeand correct to the li best of my knowledge. I also certify that t is application is being made with the full knowledge and consent of all owners of the affected property. MAR ! Q ISI 3/19/2016 �_J IusoowxER OR Aura Or ,c RerafRservTA.rcesw ma 0"o "T .m,n w icma rhea-aav usavata