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Home My WebLink AboutRequest for Variance, Stormwater Facility Inspect and Prop Spot Reality Expansion for BLD95-00861 - VAR Letters / Memos - 12/19/1983 MASON COUNTY DEPARTMENT of GENERAL SERVICES Courthouse Annex 2 N. Fourth & W. Cedar P.O. Box 186 Shelton, Washington 98584 (206) 426-SS93 Director - Ken Stevens building environmental health maintenance parks&recreation planning sewer&water December 19, 1983 Board of County Commissioners Mason County Courthouse P. 0. Box 400 Shelton, Washington 98584 Commissioners: Mr. Robert A. Soltis has requested a variance from Mason County's Parking Ordinance No. 815 in regard to a new office building complex he wishes to build in Belfair, Washington, Mason County. This office building will house a real estate business and including Mr . Soltis , five persons will work in and out of this building dealing in the -field of real estate., The structure is designed including fifteen parking spaces , but our ordinance requires twenty two (22) . If this building were a retail store our parking ordinance would only require nine (9) parking spaces. Our parking ordinance should be re-written. I recommend the commission grant this variance. Respectfully, Ken Stevens Director KS/bc MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 August 16, 1995 INTER-DEPARTMENTAL COMMUNICATIONS DATE TO: ALLAN BORDEN, DCD - Planner FROM: ALAN A. TAHJA, P/W - Hydraulic Engineer SUBJ: BLD 95-0861 Proposed Spot Realty Expansion James Zimney has submitted a small parcel detention system design for the proposed expansion of Bob Dick's Belfair Spot Realty office. Without disputing the ability of the site to infiltrate the runoff from the parking area of the expansion as required in Mason County's Parking Ordinance, Public Works considers the runoff rate proposed from the detention facility sized in the submitted plan to be acceptable, and the proposed plan acceptable under Mason County Parking Ordinance requirements. I briefly discussed the submitted plan with Mr. Dick this morning, and suggested the plan could be improved if the upper catch basin in the detention mechanism were fitted with a grate and a portion of the parking area graded to drain towards it. Enclosed please find two copies of the site plan indicating the location of the detention facility and two copies of the worksheet indicating the design components. The materials for construction are not specified, and either plastic or metal pipes and catch basins would normally be acceptable for construction of the detention pipe and catch basin structures, but because the catch basins appear to be sited in areas subject to traffic, corrugated metal pipes should be required, or the basins should be sited in locations not susceptible to traffic. During construction, flow delivery paths should be intercepted with either silt fences, hay bales, sand bags, or other temporary erosion control features to ensure that neighboring properties are not adversely impacted. The PSWQA guidance requires these be implemented prior to commencement of construction. I am also enclosing the small parcel drainage system standards if you are curious how the pipe diameter, length and orifice size were determined. Si rely r Ya ALAN A. TAHJA File: H:\WP\STRMWTR\REVIEWS.IDC\SPOT-2.IDC MASON COUNTY ' PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton. Washington 98584 August 16, 1995 INTER-DEPARTMENTAL COMMUNICATIONS DATE TO: ALLAN BORDEN, DCD - Planner FROM: ALAN A. TAHJA, P/W - Hydraulic Engineer SUBJ: BLD 95-0861 Stormwater Facility Inspection for Spot Realty Expansion Allan, On Monday March 25th, 1996 I received a call from Butch of Butch's Excavating requesting an inspection of the stormwater detention facilities constructed to accommodate the expansion of the Spot Realty building in Belfair, Washington. I met with Butch onsite, and found the constructed facilities to be in conformance with the approved design. The Puget Sound Water Quality Authority requires Mason County to develop an operation and maintenance program to cover all stormwater facilities (private and public) constructed within their jurisdiction. To meet this requirement, Public Works is requiring the execution of an Operation and Maintenance Covenant covering stormwater facilities approved by it. Attached please find a copy of an operation and maintenance covenant that has been reviewed and approved by the County's Prosecuting Attorney's office to meet this requirement. The proponent should complete the form, notarize the instrument, record the completed form with the County Auditor's office, and deliver a copy of the recorded covenant to Public Works prior to final approval by the County building permit. Si cerely, D A AN A. TAHJA cc: Mike Byrne - General Services/Building Department File: H:\WP\STRMWTR\REVIEWS\SPOT-INS.IDC MASON COUNTY PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER Shelton, Washington 98584 July 26, 1995 INTER-DEPARTMENTAL COMMUNICATIONS DATE TO: ALLAN BORDEN, DCD - Planner FROM: ALAN A. TAHJA, P/W - Hydraulic Engineer SU BJ: _ BLD 95-0861 Proposed Spot Realty Expansion Allan, I visited the Spot Realty office this morning to inspect for existing stormwater facilities and to get a better idea of what the proposed grading entails. Presently approximately 1/3 of the parking area runoff is directed to an existing catch basin located near the westerly point of the property. The catch basin contains no oil water separating features and is relieved by way of a 6" plastic pipe that drains out of the catch basin to the southwest. I couldn't find where the 6" pipe discharges to. The remainder of the parking areas apparently sheet flow to the North and Northwest to be delivered to State Highway 3 by sheeting down the access driveway. The roof downspouts appear to deliver their runoff to the parking area surfaces. The existing facilities appear to violate Mason County Parking Ordinance 815 which requires parking area runoff to be retained on site. The plan delivered to me contains no provisions for meeting the parking ordinance retention requirement, and delivering additional runoff to the existing catch basin is not a satisfactory solution. A permanent stormwater plan should be required for this proposal providing for retention of the parking area runoffs. If the proponent's engineer finds that retention is not feasible, discharge from the site should conform to the Puget Sound Water Quality Downstream Erosion Control Standard. At other sites in the Belfair area, this is the same standard the State Highway Department has allowed for runoff to be delivered to their ditches. As the apparent recipient of the runoff from this site if infiltration cannot be accomplished, the State DOT should be consulted for their approval of discharges to their ditches. A creek is shown on the submitted sketch, and was found in the field. Though it has been fairly dry recently, the creek was flowing and appears to be a year round creek. The creek runs under the state highway and ultimately to Hood Canal . The presence of this creek less than 200 feet from the property may warrant further review. I've crudely estimated the amount of material required to accommodate the � � proposed building and parking area expansion as. . ((70'xl25')/2)x4'deep = 648 cubic yards. File: H AWP\LETTERS\SPOT-R.IDC r I would recommend against approving this proposal without a stormwater plan that addresses temporary construction erosion and sediment control and permanent stormwater impact mitigation. Additional features that may need attention are that the driveway (extension of the existing access) connected to the northeast corner of the property delivers runoff onto the realty parking area/driveway and creates a hazard during freezing conditions. Also, this paved portion of the driveway may cover a portion of the facility's drainfield. I hope my comments are helpful in deciding what actions to take concerning this proposal . SZc74JA Si ALAO A. TAHJA File: H:\WP\LETTERS\SPOT-R.IDC 3 _ +� , � _ r� I � I f �� -_� -� - __ ,� - _ �-�..- w.. � �. , �. _ _ �R-- 4 1� �T.� �