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HomeMy WebLinkAboutSEPA E98-0010 - HIGHLINE SCHOOL DISTRICT - CRESTVIEW RESERVOIR, SCHOOL DEMOLITION AND METER STATIONCRESTVIEW RESERVOIR - HIGHLINE SCHOOL DISTRICT 401 CONSTRUCT WATER STORAGE RESERVOIR, SCHOOL DEMOLITION & METERING STATION 16200 42ND AVE S. E98-0010 Mayor Ms. Terry Anderson Deputy Mayor Shirley Thompson Councilmembers Steve Stevenson, Sr. Frank Hansen Kathy Gehring Joe Brennan Don DeHan 17900 International Blvd., Suite 401 • SeaTac, Washington 98188-4236 City Hall: (206) 241-9100 • Fax: (206) 241-3999 • TDD: (206) 241-0091 City Manager Calvin P. Hoggard Assistant City Manager Jay Holman City Attorney Robert L. McAdams City Clerk Judith L. Cary May 1, 1998 Peggy Bosley, General Manger Highline Water District P.O. Box 3867 Kent, WA 98032 Re: Crestview Reservoir Project/Project 96.3 Dear Ms. Bosley, Thank you for the opportunity to comment on the Crestview Reservoir Project, at the present time we do not have any SEPA comments. However, we would like to inquire on the proposed haul route for the truck trips that will be generated as a result of this project. If there are more then six (6) loaded trucks an hour and City of SeaTac roads are used (i.e. Military Road South) we will need to issue a haul permit. If a haul permit is required, the haul route plan, will need to include the time frame of hauling activities and proposed traffic controls. If we need to issue a haul permit, we would like to be included in any pre -construction meeting with Highline Water District and Tukwila to ensure proper coordination on our part. If you have any questions regarding this please contact Dale Schroeder, SeaTac Engineering. Supervisor, at (206) 241-1996. S' rely //(1c4 Michael Booth Senior Planner cc: Dale Schroeder, Public Works Department Dixie Hallenberger, Engineering Division t Jack Pace, City of Tukwila \\seatac\voI l\group\planning\michael\crestviewsep.ltr.doc • City of Tukwila John W. Rants, Mayor Department of Community Development Steve Lancaster, Director April 30, 1998 Peggy Bosley, General Manager Highline Water District 23828 - 30 Ave S. Kent, WA 98032 Re: SEPA Checklist comments concerning Crestview Park Reservoir Revision Dear Ms. Bosley: Thank you for providing Tukwila with the opportunity of reviewing the SEPA checklist on the referenced action. Most of the comments pertaining to this action involve direct impact to Tukwila's Parks and Recreation Department. Don Williams, the Director of the Parks and Recreation Department, has provided comments to Highline and Parametrix staff. The following is a summary of the potential recreation impacts (Item 12) raised in his April 3, 1998 letter: 1. Tukwila has exclusive use of the proposed tank site for park purposes. There is no current legal right for the water district to build in the park area. 2. If construction occurs, a plan needs to be developed that anticipates continued use of the non -affected park areas during the construction period. 3. No plan for relocating and/or reusing the shelter is mentioned in the checklist, which will occur as a result of the new reservoir. 4. Any new parking must comply with City of Tukwila parking requirements, including the development of parking stalls that meet the Washington State Barrier Free code. 5. The site of the proposed reservoir should be re-established as park with similar conditions. 6. Disruption of the play equipment adjacent to the construction site should be avoided. 7. The portable restroom facility must be maintained during the construction period. 8. The present school site, after demolition, could be used for additional park area. In addition to the preceding comments, an approved permit from PSAPCA is required to apply for a City of Tukwila Demolition Permit. Again, thank you for the opportunity to comment on this project. Sincerely, Michael Jenkins Assistant Planner cc: Reviewing city departments 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 April 3, 1998 City of Tukwila 6200 Southcenter Boulevard • Tukwila, Washington 98188 Mr. Michael Jenkins Assistant Planner Department of Community Development 6300 Southcenter Boulevard Tukwila WA 98188 Subject: Crestview Park Revision - Environmental Review Dear Michael: John W Rants, Mayor After receiving the Highline Water District's Environmental Checklist for this proposed water reservoir project, I would like to enter several written comments for the record. I have met several times with Highline School District, Highline WaterDistrict, and the Water District's consulting engineering staff to discuss problems and concerns. As of today, no official action has occurred related to those concerns. I did note under Section 12 of the E.C. that some of my concerns are recognized. It is my hope that the school district, water district, and my department can resolve in writing the concerns before this project is started. Concerns Comment/Action Needed A. Tukwila has exclusive use of the proposed tank site for park purposes. Presently the water district has no legal right to build in the park area. B. If and when construc- tion occurs, a plan needs to be developed to accommodate continued use of the non- affected park areas. C. The existing shelter is proposed to be removed and then relocated after the tank is built. Nothing is mentioned of what will be done in the E.C. about the shelter. The school district and City must modify the existing long- term lease to allow this project to be completed. It is also our understanding both districts desire the city to operate the existing building site as a public park area. If this is the case, the existing lease agreement must be modified. Our Parks and Recreation Department will require the new and old park areas be established to our park design standards. The baseball diamond in the southeast corner of the property must be accessible for youth games April 1 through July 1. Parking for 25 cards must be provided with a safe access - route between the parking and diamond, play equipment, and play court areas. The reservoir contractor or water district must obtain city approval to remove the shelter and then to reconstruct it. It is our wish it be re-established in the same location. A building permit must be obtained, inspections completed, and approval to occupy must be obtained. Phone: (206) 433-1800 • City Hall Fax: (206) 433-1833 • D. The current park's parking area could be greatly impacted. E. The present school building site could be used as additional park area. F. The site of the reservoir is presently park area and should be re-established as park area rebuilt to previous conditions. Exceptions to this would be for tree removal and turf quality. (Comments about the picnic shelter, see C above.) G. The construction area abuts the existing play equip- ment and should be avoided. H. Presently the city provides a year-round portable restroom on site. • The city and both districts need to decide if the old school parking area will be used for park parking, or will both be used, or only the present park parking area? Improvements will be needed if the old parking area is to be used. It will need to be repaved and striped to match the new paved parking area we just completed, including ADA stalls. If this area is cleared, the school district must maintain it. If the school district desires the city to maintain it as a public park area, then our department must be allowed to determine how the park area is to be built. If the area does not become a public park area, it should be fenced off and maintained by the school district for the public's safety. The city will require all disturbed and new park areas to be irrigated. Such a system should be built to city specifications. Water to irrigate these areas shall be provided at no charge to the city who will maintain the system and the grounds over and around the tank and all other park areas. If trees are removed for reservoir construction, a tree replacement plan shall be developed to meet city codes. Our department shall assist with such a plan for park usage and maintenance considerations. The city recently invested $15,000 for new ADA approved equipment. It is requested this area remain accessible and not disturbed. Fencing will be needed to protect park visitors. The ability to continue this service must be maintained during construction; however, the contractor must provide their workers a separate facility. In conclusion, it is apparent this project will affect the public's safety and ability to use this existing park. Conditions should be set forth to ensure the city park is appropriately rebuilt and usage agreements are established. Please contact me after April 13, if you have any questions. Sincerely, Don Williams, Director Parks and Recreation Department cc: John McFarland, City Administrator Keith Harris, P.E., Highline Water District Alan Schmidt, Director of Maintenance, Highline School District Michael 011ivant, P.E., Parametric, Inc. Park/cvwater - 4-3-98 • DETERMINATION OF NON -SIGNIFICANCE Description of Proposal: The purpose of the project is to construct a water storage reservoir at the Crestview Elementary School site to increase the water storage capacity in the Highline Water District and serve future peak demand requirements. The project may also provide additional capacity to help serve the demand in neighboring water districts. The project consists of several components including demolition of the Crestview Elementary School, construction of a 7.6 to 8.1 million gallon reservoir, installation of a new metering station and hookup to the Cedar River Pipeline #4, and construction of potable water pipelines and drain/overflow lines. Proponent: Highline Water District Location of proposal: The reservoir site is located east of 42nd Avenue S. between S. 160th and S. 164th Streets at 16200 42nd Avenue South in the City of Tukwila. The site is located in Section 27, Township 23 North, Range 5 East of the Willamette Meridian. Lead Agency: Highline Water District The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21 C. 030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. There is no comment period for this DNS. This DNS is issued under 197-11-340(2); the lead agency will not act on this proposal for 15 days from the date below. Comments must be submitted by 4/30/98 . Responsible Official: Peggy Bosley Position/Title: General Manager Address: Highline Water District 23828 30th Avenue S. Kent, WA 98032 Date: 3/;? 4/ 9* Signature: Phone: (206) 824-0375 • • ENVIRONMENTAL CHECKLIST TO BE COMPLETED BY APPLICANT A. BACKGROUND 1. Name of proposed project, if applicable: Crestview Reservoir 2. Name of applicant: Highline Water District (District) 3. Address and phone number of applicant and contact person: Applicant Keith Harris, P.E. Manager, Planning/Construction Highline Water District 23828 30th Avenue S Kent, WA 98032 Phone: (206) 824-0375, ext. 142 Contact Tom de Laat, P.E. Design/Environmental Project Manager Parametrix, Inc. 1231 Fryar Avenue Sumner, WA 98390 Phone: (253) 863-5128 4. Date checklist prepared: March 24, 1998 5. Agency requesting checklist: Highline Water District 6. Proposed timing or schedule (including phasing, if applicable): It is estimated that demolition of the school would start in the summer of 1998. Construction of the reservoir, metering station, and piping would commence in the fall of 1998, provided all permits are secured. It is planned for all construction and restoration of the site to be completed by January 1, 2000. RECEIVED Highline Water District 1 Crestview Reservoir MAR 31 1998 COMMUNITY DEVELOPMENT 21-2714-01 March 25, 1998 • • 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. The Highline School District has indicated that at some time in the future a new elementary school may be constructed on the site. A pump station may be needed in the future and it is likely that the pump station would be located near the reservoir site. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A preliminary geotechnical reconnaissance was performed that included soil borings and soil samples (Landau Associates, Inc. 1997) and a technical memorandum was produced. A Phase I Environmental Site Assessment was performed for the Crestview Elementary School (Geo Group, 1997). 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. There are no known applications pending for approvals of other proposals that would directly affect the project. 10. List any government approvals or permits that will be needed for your proposal, if known. City of Tukwila • Unclassified Use permit • Demolition permit • Tree Cutting permit • Load Hauling permit • Mechanical permit • Sewer permit • Land Altering/Grading/Preloads permit • Building permit • Franchise Utility permit • Storm Drainage permit • Street Use permit Other Agency Approvals Puget Sound Air Pollution Control Agency • Notice of Intent to Perform Asbestos Removal and Demolition Washington Department of Labor and Industries • Electrical permit Highline Water District 2 21-2714-01 Crestview Reservoir March 25, 1998 • • 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) Purpose The purpose of the project is to construct a water storage reservoir at the Crestview Elementary School site (Figure 1) to increase the water storage capacity in the Highline Water District and serve future peak demand requirements. The project may also provide additional capacity to help serve the demand in neighboring water districts. The project consists of several' components including demolition of the existing Crestview Elementary School buildings, construction of a 7.6 to 8.1 million gallon reservoir, installation of a new metering station and hookup to the Cedar River Pipeline #4 (CRPL #4), and construction of potable water fill and draw pipelines to the reservoir and drain/overflow lines (Figure 2). Elementary School Demolition The existing Crestview Elementary School buildings would be demolished as part of this project. Demolition of the school is a requirement of the Highline School District as partial compensation for an easement to construct the reservoir. Demolition of the school would also provide an area for the contractor to stockpile excavated earth and store construction supplies and equipment. Demolition of the school would meet all regulatory requirements for asbestos removal, fuel tank removal, structure demolition, and utility abandonment. The parking lot on the west side of the school would not be removed as a result of this project. It is anticipated that restoration of the school site would consist of grading the area, covering it with native sand taken from the reservoir excavation site, and hydroseeding. The City of Tukwila Fire Department has indicated a desire to burn the school in a controlled manner as a training exercise. It has not been determined if this request would be allowed. Water Storage Reservoir The proposed reservoir would have a water holding capacity of 7.6 million gallons. The District is considering a possible enlargement of the reservoir to provide a water holding capacity of 8.1 million gallons to joint use by other interested water districts. The reservoir would be constructed on the northwest corner of the project site. This area is currently leased from the Highline School District by the City of Tukwila and used by the Tukwila Parks Department as a city park, play ground, and little league baseball field. A 200 -foot (or smaller) diameter tank would be constructed with a new metering station and rely on CRPL #4 water pressure (instead of a pump station) to fill the reservoir. A larger diameter reservoir was initially considered to lessen the depth of excavation. It was concluded, however, that the 200 -foot diameter tank with a greater liquid depth (32 feet) than the larger diameter tank would be easier to fill using the pressure available from the CRPL #4. The actual tank diameter would be determined during final design. Highline Water District 3 21-2714-01 Crestview Reservoir March 25, 1998 Er. S 164th St Parametrix, Inc. S 152nd St 59th St _10 5161st SIN B:ik Ino Reservoir Site at Crestview Elementary School FILE: liftittlane DATE: 03/25/98 4 Figure 1 Vicinity Map Tie to Existing Highline Water System New Metering Station Tie to CRPL #4 Crestview School (to be demolished) Highline 21-2714-01-130 5 Figure 2 Highline Water District Reservoir Component Pian • • Should the District proceed with the additional 0.5 million gallons to provide storage capacity for other districts, the reservoir diameter would be 200 feet and the tank water depth would increase by 2.1 feet. Assuming the reservoir at 200 feet in diameter, the total depth of excavation would be approximately 40 feet with temporary side slopes at 1:1. The bottom of the excavation would be 220 feet in diameter to allow 10 feet of working space around the base slab of the tank for concrete form work and access. The bottom of the excavation would be shored a minimum of 10 feet in height to provide worker safety and slope stability of the excavation. The contractor may elect to over excavate the south side of the site to develop a ramp access to facilitate removal of excavated earth and provide better access to the bottom work area. The reservoir would be concrete and it is anticipated it would be constructed of precast, prestressed, and post tensioned panels to eliminate cracking and possible reservoir leaking. Precast panels would be constructed at a manufacturing plant and assembled at the reservoir site, thereby minimizing the amount of construction and time of disturbance on-site. The roof system is anticipated to be precast T -beams or cordslab construction which would also minimize the amount of onsite construction and disturbance to the surrounding neighborhood. Alternative methods of construction such as a cast -in-place concrete may also be feasible. The reservoir would be covered with approximately 2 feet of earth and/or top soil. On the south side of the tank, the earth cover may be deeper to blend the soil cover into the existing ground surface. Surface water would be directed away from and/or off of the top of the reservoir. It may also be appropriate to incorporate a sand layer over the reservoir top with an underdrain system to direct surface water to the outside edge of the reservoir. Based upon the absorption rate of the native sandy soil, it is anticipated that surface water would rapidly infiltrate into the ground and remain on site. Metering Station Based upon historic operational statistics and projected demand on CRPL #4, the District's existing metering station on CRPL #4 for its Crestview Pump Station is about 1,100 feet downstream (west) of the proposed reservoir. System head loss in CRPL #4 to the downstream location reduces available pressure at that location insufficient to fill the reservoir at the Crestview Elementary site without pumping. By placing a new metering station at the elementary school access to S 160th Street, pumping can be eliminated. It is likely that the pipeline would fill the reservoir without the assistance of a pump station. The new metering station would simplify construction of the conveyance pipelines along S 160th Street, because only a single line would be needed (a double line would be required if a new pump station was constructed). It may still be necessary to construct a pump station in the future depending upon system demand changes in both the District and the CRPL #4. Highline Water District 6 21-2714-01 Crestview Reservoir March 25, 1998 • • Potable Water Line and Drain/Overflow Line The potable water pipeline connection of the new reservoir to the existing District distribution system would be 30 inches in diameter. The single water line would be constructed west along S 160th Street and connect to an existing 24 -inch line near the existing Crestview Pump Station. The reservoir will be provided with a drain line to allow drainage of the tank, and flushing if needed for maintenance. The overflow is needed as an emergency backup measure to safely dispose of water in case of a failure in an "open" position of the inlet control valve. The existing downstream public storm or sanitary sewer lines do not have sufficient capacity to accommodate all of the potential water volume that could be generated from the reservoir overflow line. The District is currently evaluating several alternatives for the overflow/drain line including (1) use of the return line for pressurized overflow into Gilliam Creek, (2) use of a dedicated gravity feed line for overflow into Gilliam Creek and (3) discharge to the street section at the northwest corner of S 160th Street and 42nd Avenue S. Under the first alternative, a solenoid valve located adjacent to Gilliam Creek would operate the overflow line. The valve would operate on a signal from the reservoir and open the valve discharging water to the creek. Under the second alternative, a dedicated overflow would be constructed from the reservoir to the creek. If the reservoir became too full it would spill into the line and water would discharge to the creek. The third alternative would be to discharge to the street. It has not yet been determined what method of conveyance would be used to direct the water to Gilliam Creek. Possible methods of conveyance include the street section itself, use of the existing or a future storm sewer system with partial flow within the street section or conveyance within a pipeline sized to handle the overflow event. Regardless of the overflow/drain option, the District would install second order or greater redundancy on the incoming supply line to eliminate or reduce the risk of an overflow. Inlet control redundancy would be provided through a series of valves which would close upon receiving a high water level signal from the reservoir. Other Design Features Inlet control devices would be provided to stop the flow of water into the reservoir when it has filled to its normal operating level. Redundant control device(s) would be installed to assure that water supply into the reservoir would be stopped even if the first control device should fail. A vent is required from the top of the reservoir to allow the exhaust and intake of air as the water level in the reservoir fluctuates. Venting may be accomplished using single or multiple vents. Vent(s) may consist of goose neck piping at the highpoint, a goose neck along the side of the reservoir connected to the highpoint by underground piping, or possibly a vent incorporated into a park structure or reservoir accessway. Highline Water District 7 21-2714-01 Crestview Reservoir March 25. 1998 • • Access into the reservoir can be provided through a number of different methods. Accessways can be flush with the surrounding ground if provided with watertight and self draining hatches to prevent surface water from entering the reservoir. Accessways and possibly the vent apparatus, could also be incorporated into a small building built into the reservoir roof. Should a small building within the park open area be pumped, it would have to be approved by the school district and the parks department. A manway ladder would be provided for access to the floor of the reservoir. The manway would be located under the access hatch and would be attached to one of the roof cobimns or on the side of the reservoir. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The reservoir site is located east of 42nd Avenue S between S 160th and S 164th Streets at 16200 42nd Avenue S in the City of Tukwila. The site is located in Section 27, Township 23 North, Range 5 East of the Willamette Meridian. TO BE COMPLETED BY APPLICANT B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other: Most of the site if fairly level except for the northwest corner of the site where the slope becomes steeper (see 1.b below). b. What is the steepest slope on the site (approximate percent slope)? The steepest slope on the reservoir site is approximately 25 percent. However, most of the site is fairly flat (under 5 percent slope). The steepest slope along the overflow line is approximately 20 percent. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The subsurface conditions on the reservoir site were found to consist of glacial advance outwash material to depths of 60 to 80 feet below ground surface. The glacial advance outwash material mainly consists of medium dense sand that becomes very dense with depth. Some fine to medium sand with traces of silt and occasional fine gravel also makes up the outwash material. Highline Water District 8 21-2714-01 Crestview Reservoir March 25, 1998 • • d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. There are no surface indications or history of unstable soils in the immediate vicinity. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. Excavation is needed so that the reservoir can be buried underground. Total excavation for a 7.6 million gallon reservoir would be approximately 66,000 cubic yards. Approximately 46,000 cubic yards of material would be excess and removed from the site. Approximately 20,000 cubic yards of material would be stockpiled and later used as backfill around the reservoir. Material used for backfill would be stockpiled where the existing school is now located. The total excavation for a 8.1 million gallon reservoir would be approximately 70,000 cubic yards. Of this amount, 48,000 cubic yards would be excess material and 22,000 cubic yards of material would be stockpiled and later used as backfill. Fill material would be required to backfill the excavated area not filled by the water reservoir tank, to provide cover material over the tank and to provide suitable surface soil to reestablish vegetation. Approximately 3,000 yards of fill associated with modifying the existing topography would be required. The source of the fill would be the native material taken from the reservoir excavation. New topographic contours would be blended into the existing park features. Grading would be needed to achieve final topographic grades to blend the reservoir into the park and restore the school site. Native material from the excavation would be used to grade over the reservoir as well as the school site. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Erosion could occur as a result of excavation and ground clearing for on-site and off-site improvements. However, construction best management practices (BMPs) would be used to control erosion. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? The project would result in a loss of impervious surface at the reservoir site. The reservoir would be completely buried and covered with soil leaving no impervious surface. The demolition of the school will remove approximately 25,625 square feet of impervious surface. Highline Water District 9 21-2714-01 Crestview Reservoir March 25, 1998 • • h. Proposed measures to reduce or control erosion, or other impacts to the earth if any: A temporary erosion and sediment control plan (TESCP) would be developed for use during construction. The TESCP would utilize recognized construction best management practices. BMPs may include some or all of the following: preservation of the existing vegetation where possible, temporary seeding, mulching, graveling, fabric fencing, dikes, swales, subsurface drains, gradient terraces, etc. The actual measures would be included in the TESCP in accordance with permit requirements. 2. Air a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. Construction Emissions - Construction related vehicles and machinery will cause hydrocarbon emissions in varying quantities. Emissions would be produced by automobiles, trucks, backhoes, bulldozers, cranes, etc. Dust is also expected to occur as a result of grading and general excavation of the soil. There would be no exhaust of fumes or chlorine gas (chlorine gas would not be used or stored on the site). There would be air periodically exhausted from the reservoir vent. There could be a slight chlorine odor in the immediate vicinity of the vent. However, there would be no health risk from this odor. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. There are no off-site emissions or odors that would affect the project. c. Proposed measures to reduce or control emissions or other impacts to air, if any: Excessive dust would be reduced by spraying water over disturbed soil areas. 3. Water a. Surface 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. There are no surface water bodies in close proximity to the reservoir site. The nearest surface water body is Gilliam Creek which is located approximately 2,500 feet north of the reservoir site. Bow Lake and Lake Reba are located approximately 8,000 and 9,000 feet away, respectively. Highline Water District 10 21-2714-01 Crestview Reservoir March 25, 1998 • • 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Most of the project is not within 200 feet of any described waters. The construction of the overflow/drain line may result in work adjacent to Gilliam Creek depending upon the overflow/drain line alternative chosen. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill materiaL There would be no fill or dredge material placed in surface water or wetlands. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No surface water withdrawals or diversions would be necessary. 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. The proposed project does not lie within a 100 -year floodplain. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. The proposal could involve a discharge of chlorinated water to Gilliam Creek. The volume of water that could be discharged through the overflow assuming failure of both inlet control systems would be approximately 10,000 gallons per minute. In the event of an overflow, there may be chlorine residual remaining in the water. However, the first line of defense for an overflow are redundant inlet control valves that would discontinue the flow of supply water into the reservoir in the event of a high water occurrence. The redundant valves would provide a second order level of safety to guard against an overflow occurrence. The overflow itself is a third order safety measure. If the reservoir must be drained, the majority of the water in the reservoir would be conveyed into the Highline Water District's distribution system. Any residual amount of water remaining in the reservoir may be drained into Gilliam Creek through the overflow/drain line (or into the street section). b. Ground: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. No ground water would be withdrawn and no water would be discharged to ground water. Highline Water District 11 21-2714-01 Crestview Reservoir March 25, 1998 • • 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals ...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. No waste material would be discharged into the ground from other sources. c. Water Runoff (including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. The only source of runoff would be storm water. Based on an evaluation of the infiltration rate of the native soil, storm water on the site would infiltrate rapidly into the ground (infiltration rates of 2.4 inches/hour in the upper 5 feet of soil and 8 inches/hour below a depth of 5 feet). With the tank buried underground, minimal new impervious surfaces and the sandy site soils, no significant amounts of storm water would collect on site or necessitate the need for storm water controls. 2) Could waste materials enter ground or surface waters? If so, generally describe. In the event of the reservoir overflowing through the overflow line, chlorinated water would be discharged to Gilliam Creek. Some of the chlorine in the water would dissipate as it moves along the overflow line. d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: The reservoir is designed to have redundant safety systems to prevent an accidental overflow. 4. Plants • a. Check or circle types of vegetation found on the site: deciduous tree: alder, maple, aspen, other X evergreen tree: fir, cedar, pine, other X shrubs X grass pasture crop or grain wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other water plants: water lily, eelgrass, milfoil, other other types of vegetation Highline Water District 12 21-2714-01 Crestview Reservoir March 25, 1998 • • b. What kind and amount of vegetation will be removed or altered? The site includes both natural and landscape vegetation including grass, fir trees, and various shrubs and bushes such as rhododendrons, Oregon grape, salal, and ornamentals. Excavation and backfill of the reservoir and inlet and outlet piping would disturb the surrounding trees, vegetation, and park improvements. c. List threatened or endangered species known to be on or near the site. The Washington Department of Natural Resources was contacted for information on threatened or endangered plant species (January 1998). It was determined that there are no listed or endangered plant species or high quality ecosystems known to be on or near the site. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: Vegetation would be restored so that the landscape was similar to the original park condition. The area where the school is demolished would be seeded with grass after grading. An irrigation system would be constructed for the area disturbed by the reservoir construction. Trees removed from slopes that are 20 percent or greater would be replaced per City of Tukwila ordinance. 5. Animals a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: birds: hawk, heron, eagle, songbirds, other mammals: deer, bear, elk, beaver, other fish: bass, salmon, trout, herring, shellfish, other: b. List any threatened or endangered species known to be on or near the site. The Washington Department of Fish and Wildlife was contacted for information on threatened and endangered species (February 1998). It was determined that there are no threatened or endangered species on or near the site. c. Is the site part of a migration route? If so, explain. Generally, all of the river basins, lakes, and marsh areas of the Puget Sound region are part of the Pacific Flyway. The Pacific Flyway is used by waterfowl and other birds for shelter and food gathering during the annual migration. The project is not located within any of the areas described above. d. Proposed measures to preserve or enhance wildlife, if any: None proposed. Highline Water District 13 21-2714-01 Crestview Reservoir March 25, 1998 • • 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. There would be minimal electrical requirements necessary to operate the reservoir signals, metering station, and inlet valves. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. The project would not affect the potential use of solar energy by adjacent properties. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: No energy conservation features are proposed. 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. There are two underground storage tanks located on the west side of the southern -most school building (a heavy oil tank and a light oil tank). Fill ports for the two tanks are located in the gravel parking area next to this building. It was undetermined whether either of these tanks has any contents. Soil testing next to the tanks indicated that there had likely been no leakage of petroleum materials from the two tanks. These tanks would be removed as part of the elementary school demolition. All of the elementary school buildings contain asbestos. Generally, the asbestos is either thermal system insulation or miscellaneous materials. The thermal system insulation asbestos was found in the hard lagging and mud on pipe runs, pipe fittings, elbows, and hangers. The thermal system insulation asbestos was determined to be friable (when dry, the asbestos can be crumbled, disintegrated, or reduced to powder by hand pressure or by the forces exerted against the material during demolition or disposal). Friable asbestos is a health hazard. The miscellaneous asbestos materials are found in the kick panels on exterior doors, flexible duct connectors on the heat exchangers in the mechanical rooms, floor tiles, undercoating on steel sinks, window putty, vinyl sheet flooring and/or mastic, the panels and atop the covered walkways and the sunshade panels. The miscellaneous asbestos material was found to be non -friable. 1) Describe special emergency services that might be required. It is not anticipated that any special emergency services would be needed. Highline Water District 14 21-2714-01 Crestview Reservoir March 25, 1998 1 • 2) Proposed measures to reduce or control environmental health hazards, if any: Removal of the underground storage tanks would be performed in accordance with local and state regulations. Removal of the asbestos material in the school would be performed in accordance with the Puget Sound Air Pollution Control Agency regulations and by a person trained in accordance with the Washington Department of Labor and Industry Standards. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic equipment, operation, other)? There would be noise associated with heavy equipment and construction activities during the school demolition and while the reservoir is being built. There would be no noticeable operational noises once the project is completed. 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Construction would generate short-term noise. The maximum noise levels generated by construction equipment and vehicles ranges from 70 to 110 decibels (dBA) at 25 feet. While noise from construction only occurs during construction, it does raise the ambient noise levels and is often accompanied by shorter intense bursts of noise. Increased daytime construction noise typically results in annoyance to sensitive receptors such as hospitals and schools. However, there are no sensitive receptors in the vicinity of the project. Residences may also be disturbed by construction noise, but this annoyance typically occurs in early morning or evening hours. 3) Proposed measures to reduce or control noise impacts, if any: Mitigation for construction noise should include the following measures: • Construction operations should be scheduled or timed to keep average sound levels low. Those activities producing the highest noise levels should be scheduled to coincide with the highest ambient noise levels such as peak traffic periods. Similarly, activities should be curtailed during periods when noise impacts on residential areas would be most severe, such as during evening hours. • Construction hours should be limited to specific times. • Equipment should not be left idling when not in use. • Mufflers and sound attenuation devices should be installed and maintained on all equipment. • Small portable acoustic screens should be placed around particularly noisy equipment. Highline Water District 15 21-2714-01 Crestview Reservoir March 25, 1998 • • 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site is mainly used for recreation. Facilities on the site include a park (the City of Tukwila has a 40 -year lease for the park area) and the Crestview Elementary School. The park consists of open and wooded areas and includes a parking area, picnic shelter, playground equipment, basketball court, asphalt play area, and a baseball field. The baseball field is used extensively by the Little League starting in April and running through the summer. The Crestview Elementary School is in a deteriorating condition and is no longer used for teaching. The school is used by the Highline School District to store desks, chairs, tables, and lamps. The majority of the properties adjacent to the project site are single-family residences. The exceptions are a dental office located west of the site and a daycare center located to the south. b. Has the site been used for agriculture? If so, describe. The site has not been used for agriculture in the recent past. The area was farmed in the 1930's and 40's, but by the 1950's, the project site was unused and property in the vicinity had been converted into single-family residences. c. Describe any structures on the site. The site where the reservoir would be located has a picnic shelter. The Crestview Elementary School buildings are adjacent to the reservoir site. The school consists of three buildings including a gym/cafeteria and office building, and north and south buildings. d. Will any structures be demolished? If so, what? The existing elementary school would be demolished. Some of the park structures such as the picnic shelter would be taken down and replaced following construction. e. What is the current zoning classification of the site? The reservoir site is zoned low density residential. f. What is the current comprehensive plan designation of the site? The current comprehensive plan designation for the reservoir site is low density residential. There is also a public recreation overlay designation for the site. g. If applicable, what is the current shoreline master program designation of the site? Not applicable. Highline Water District 16 21-2714-01 Crestview Reservoir March 25, 1998 • • h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. There are no environmentally sensitive areas on the reservoir site. Gilliam Creek is considered an environmentally sensitive area. i. Approximately how many people would reside or work in the completed project? No people would reside at the completed project. There would also be no full-time people employed at the project. However, water district staff would periodically visit the site to monitor equipment and perform routine maintenance. j. Approximately how many people would .the completed project displace? No people would be displaced. k. Proposed measures to avoid or reduce displacement impacts, if any: Not applicable. 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: The project would replace existing park structures and vegetation removed during construction. 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. Not applicable. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. Not applicable. c. Proposed measures to reduce or control housing impacts, if any: Not applicable. Highline Water District 17 21-2714-01 Crestview Reservoir March 25, 1998 • • 10. Aesthetics a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The tallest structure would be either the vent or accessway depending on the final design. If the vent was incorporated into one of the park structures or a separate building, it would be approximately 10 feet tall. Otherwise, it would be 3-5 feet in height. The proposed reservoir would be buried underground and constructed of concrete. b. What views in the immediate vicinity would be altered or obstructed? No views would be obstructed. The view of the site would be improved by removing the existing elementary school. The elementary school is boarded up and is in a deteriorating condition. c. Proposed measures to reduce or control aesthetic impacts, if any: The reservoir would be buried underground. 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? The project would not produce light or glare. b. Could light or glare from the finished project be a safety hazard or interfere with views? Not applicable. c. What existing off-site sources of light or glare may affect your proposal? No off-site sources of light or glare would affect the proposal. d. Proposed measures to reduce or control light and glare impacts, if any: Not applicable. 12. Recreation a. What designated and informal recreational opportunities are in the immediate vicinity? The site itself provides recreational opportunities. The area where the reservoir would be sited is a park. The project property also includes trails, a baseball field, and basketball court. Highline Water District 18 21-2714-01 Crestview Reservoir March 25, 1998 • • b. Would the proposed project displace any existing recreational uses? If so, describe. The project would displace park users during the construction period. c. Proposed measures to reduce or control impacts, if any: The contractor will need to install temporary fencing around the construction area to separate construction operations from citizens using the park and the baseball field. It is anticipated that the Highline Water District would need to work with the Highline School District and City of Tukwila Parks to provide temporary parking during construction. The temporary parking would be ideally located on the existing school parking lot that is currently not available to the public. Additional pedestrian facilities may also have to be constructed to allow access to the baseball field and park facilities. 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. There are no places or objects listed on, or proposed for, national, state, or local historic registers known to be on or next to the site. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. There are no landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or near the site. c. Proposed measures to reduce or control impacts, if any: Not applicable. 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The site is accessed via 42nd Avenue S and S 162nd Street. b. Is site currently served by public transit? If not, what is the approximate distance to ' the nearest transit stop? Metro route 170 runs from S 188th Street along Military Road S to S 160th Street and then to Pacific Highway S. This route connects McMicken Heights with downtown Seattle. The nearest transit stop is located near the corner of Military Road S and S 164th Street. Highline Water District 19 21-2714-01 Crestview Reservoir March 25, 1998 • • c. How many parking spaces would the completed project have? How many would the project eliminate? The project would not have any completed parking spaces. The project may result in an increase in parking at the park by utilizing existing elementary school parking spaces that were off-limits to vehicles in the past. d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). There may be a need to reconstruct part of the access road to the park. e. Will the project use (or occur in immediate vicinity of) water, rail, or air transporta- tion? If so, generally describe. The project does not occur in the immediate vicinity of water, rail, or air transportation. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. During construction, the project would generate approximately 2,100 (22 yd3 round trips) truck trips to haul away the excess excavation material. Approximately 100 (22 yd3 round trips) truck trips would be needed to haul away construction debris. There would also be numerous truck trips for the construction of the reservoir. The number of trips would be contingent on the final type of construction. It is estimated that there would be approximately 400 truck trips for precast and probably double that amount if it were cast -in-place. These truck trips would exclude daily service truck traffic. Periodic maintenance would be the only vehicular trips associated with the completed project. g. Proposed measures to reduce or control transportation impacts, if any: Construction of the piping will require closure of one lane of traffic during construction. A traffic control plan would need to be developed to assist local vehicular flow. During construction, it may be necessary to restrict traffic to one way. One way traffic on S 160th Street would allow the contractor to expedite construction and resume normal traffic as soon as possible. 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. The project would likely reduce the need for public services such as police, because demolition of the school would remove an attractive nuisance. Highline Water District 20 21-2714-01 Crestview Reservoir March 25, 1998 • • b. Proposed measures to reduce or control direct impacts on public services, if any. No measures are proposed. 16. Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Utilities needed would include power and possibly a dedicated phone line for the telemetry system. C. SIGNATURE The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Date Submitted: Highline Water District 21 21-2714-01 Crestview Reservoir March 25, 1998 • • Parametrix, Inc. Consultants in Engineering and Environmental Sciences 5808 Lake Washington Blvd. N.E. Kirkland, WA 98033-7350 425-822-8880 • Fax: 425-889-8808 Michael Jenkins City of Tukwila 6300 Southcenter Boulevard Tukwila, WA 98188 RE: Highline Water District Open House Dear Mr. Jenkins: l-‘ iv 2 i iG'3 3 • 21-2714-01 January 16, 1998 There wasn't too big of a turnout at the open house on January 14 for the reservoir project. We had six people show up plus Don Williams from Tukwila Parks Department. Most of the people who showed really didn't have too many concerns, but were mostly interested in seeing what was planned. There were some questions raised regarding noise, the partial closure of 160th Street (during construction of the piping), and seismic safety of the reservoir. Unfortunately, we did not have anyone who lived in the northwest corner of the site show up, since this is where most of the large impacts such as the removal of trees and proximity of the work will occur. Because of the lack of turnout, the next step that the water district is going to pursue is to contact all the adjacent property owners and try to set up meetings with them to discuss the project and any concerns they have. I will keep you posted on any significant issues. I have also enclosed a copy of the public handout for your files. Let me know if there is anything else you need. Sincerely, 6.) ti,, Gary ynard, CP Printed on Recycled Paper Higtine Water DisAct Open House Information Presented by the Highline Water District Introduction The Highline Water District is beginning the preliminary design of a 7.6 -million -gallon water reservoir. The reservoir will provide needed water storage to Highline customers and meet peak demand requirements as early as the year 2000. As part of the predesign, the District is holding this Open House to ensure that the surrounding property owners, District customers, and the affected agencies are aware of the details of the proposed improvements. It is also important to the success of this project that the District understand the concerns of the property owners, customers, and the affected agencies. The conceptual design as presented today for the proposed improvements is based upon the information known at this time. As the project progresses and additional information becomes available, details of the project will change to some extent for the final design. Proposed Improvements Reservoir As shown on figure 1 the District anticipates locating the 7.6 -million -gallon reservoir in the northwest corner of the Crestview Elementary School property. The owner of the property is the Highline School District. The Tukwila Parks Department has leased portions of the school site for beneficial park use by residents of the City of Tukwila. The location of the reservoir is based on preferences expressed by the Tukwila Parks Department. As other comments are received, there is potential that the reservoir's location may be shifted somewhat to the east. The reservoir shown is 200 feet in diameter and is anticipated to be 40 feet in depth. The diameter of the reservoir could be enlarged to approximately 250 feet, allowing a reduction in the depth of 13 feet to a total of about 27 feet. The excavation area required to construct the reservoir will require removal of most of the trees in the northwest portion of the property, except for the buffer shown. After construction, the reservoir would be covered with approximately 2 feet of earth and topsoil and then revegetated/landscaped to meet both Tukwila Parks and School District requirements. As part of the reservoir project the existing Crestview School building will be demolished. The school area will be graded for appropriate drainage and replanted in grass. Pipelines Water supply pipelines for the reservoir will be constructed from a new pump station. The pipeline will be located in the South 160th Street right-of-way. A traffic control plan will be implemented to minimize impacts to local property owners along this pipeline route. The District will also provide a drainline and overflow for the reservoir. The details for these lines have not yet been developed. Your input to this project is very much appreciated. Please contact Mr. Keith Harris at the District if you have comments or questions that are not resolved at the Open House today. • Highline Water Dis tria Reservoir Restoration Plan J'!� ' Names. 8 astitili 4O Ae Proposed Legend Asphalt Rsphicersal Ave.Arse Ftspleouswa Grass Proposed Rephermatl T.. // • Highline Water Distri Reservoir Constructi n Area Plan • • -`� J•••• n- - tet' �__�:,-•---'c,`—__--_'. .to------ \Ursa - 1 r/ _ � O _` %' /"STT ////./.,///,v7/.,',/,/,',/ ///, / f% �/ t ` -. 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L 7 / ,•1r /// ././-3,7/././y ,, � „,.-./7-,/ / / '/ /' j /'' r / !r/, / /�///' ///// - /f / ` l/' if;,`; //// , / ' • -/, Fame Property 1 -Use t \\ ISL ms` F, azo-..-- -, _ RPolit• �t-T�.C:"----C--•d„l�•w.'iY�aly` Legend Approximate EreawRon Unite - contour, Highline Water District Reservoir and Pump Station Flow Schematics New Overflow 4® Alternative 1 System as Proposed in Siting Study Seattle CRPL #4 ® Altitude Valve ExistingLam° WOO Flow Meter OMB MOB EL S60 Existing Bow Lake Reservoir EL 470 New Reservoir EL 440 New Pipelines (241 • New ValVes (normally open) New Pump Station f 10,000 GPM 1 Existing Crestview Pump Station Currently being Upgraded Alternative 2 Locate New Pump Station at New Reservoir New Seattle Intertle and Flow Meter New Overflow New Valv r Ani New Control Valve #1 (normally open. dose periodically for reservoir circulation) — New Existing EL 560 Existing Bow Lake - Reservoir (narmalyopen) EL 470 New Reservoir New Pump Station 10,000 GPM Seattle CRPL #4 Existing Flow Meter New Valve (normdyclosed) New Pipeline (241 Existing Crestview Pump Station Currently being Upgraded Control Valve #1, (no moiyclosed) Compaison to Alternative 1 (+) Lower Capital Cost Less Pipe Lower Power Cost (—) Requires Second Seattle Intertle - New — Existing Highthie Aster District Pope one Corridor Pipeline Corridor from Pump Station Looking East 21-2714-01 ighiine Water District ypica8 Pump Station Typical Local Pump Station Parametrix Inc. Highline Water District Job. No. 21-2714-01 Reservoir, Pump Station, and Pipeline Project Schedule 1998 1999 ID Task Name Duration Qtr 4 Qtr 1 I Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 I Qtr 3 Qtr 4 1 Preliminary Design 45d 2 SEPA Process 50d 3 Final Design 180d 4 Construction Permitting 85d 5 Bid and Award School Demolition 50d 6 Bid and Award Reservoir, Pump Sta., & Pipe 50d 7 Construction 370d 8 School Demolition 30dill 9 Reservoir, Pump Station, and Pipeline 250d Project: Highline Reservoir Date: Wed 1/14/98 Task Summary Rolled Up Progress Progress Rolled Up Task Milestone • Rolled Up Milestone O Page 1