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Home My WebLink AboutTract A, B (2) MUNICIPALITY OF ANCHORAGI~ DEPT. OF HEALTH & ENVI~,UFJMENTAL PROTECTION , 6 1989 :JU [ ,ECEIVED CASE NO. 89-042 RETURN COMMENTS TO: DEPARTMENT OF ECONOMIC DEVELOPMENT AND PLANNING Zoning and Platting Division P.O. Box 196650 Anchorage, Alaska 99519-6650 343-4215 XXXXXX A request to rezone approximately 68 acres from R-5, I-1SL, and PC to R-10 (Residential Alpine/Slope District) and PC (Planned Community District). ...... A request to amend Title 21 to ................... . ...... A request for concept/final approval of a conditional use to permit a .................................. · in the ............... zone. ...... A request for an amendment to a conditional use ...... A site plan review for ........................... · COMMENTS: Planning & Zoning Commission Public Hearing Date: August 21, 1989 Comments Due: July 24, 1989 DISTRIBUTION: STANDARD DISTRIBUTION (Public Projects) Urban Design Commission (Ordinance Amendments) Municipal Attorney's Office XXXXXX Chugiak Community Council ....................... Federation of Community Councils ON-SITE SERVICES MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION Environmental Health Division CASE REVIEW WORKSHEET SECTION CASE NUMBER: DATE RECEIVED: COMMENTS DUE BY: 89-042 July 6, 1989 ' July 24, 1989 SUBDIVISION OR PROJECT TITLE: A request to rezone approximately 68 acres from R-5, I-1SL, and PC to R-10 and PC. ( ) PUBLIC WATER AVAILABLE ( ) PUBLIC SEWER AVAILABLE ( ) COMMUNITY WATER AVAILABLE COMMENTS: 71-014 (Rev. 5/83) ZONING MAP AMENDMENT APPLICATION OFFICE USE. Municipality of Anchorage DEPARTMENT OF COMMUNITY PLANNING REC'D P,O. BOX (~0 VERIFY OWN: Anchorage, Alaska 99502-0650 Zoning Map Amendments require at a minimum 1.75 acres of land or a boundary common to the requested zoning district, i~ The application must also be signed by 51% of the property owners in the area to be rezoned. Please fill in the information requested betow. Print one letter or number per block. Do not write in the shaded blocks. 1. Case Number (IF KNOWN) 2. Petitioning for 3. Abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34-45) full legal on back page. 4. Petitioner's Name (Last- First) 5. Petitioner's Representative Address P~ '~:>C~';/~ 5~.~'~ Address I~-~1 ',.,J~,~ ~-~ City r'~-tJr~J ~'~,t ~'"~- State ,~.~'~ City ~,n~.;.le~-~ ~_ State ,G,~; Phone No. (~,~3~. ~l~ I Bill Me Phone No. 'Z-~--'~,. '?.."7~5 ~, Bill Me 6. Current Zoning 9. Traffic Analysis Zone 7. Petition Area Acreage 10. Hearing Date 11. Principal Tax Number YYMMDD 8. Grid Number 12. No. Tax Parcels 13. Fee $ I~::)(~:) ' (~ O 14. Community Council rezone it in conformance with Chapter 21 of the Anchorage Municipal Code of Ordinances. ~ understand that payment of the basic rezoning fee is nonrefundable and is to cover the costs associated with processing this application, that it does not assure approval of the rezoning. I also understand that additional fees may be assessed if the Municipality's costs to process this application exceed the basic fee. I further understand that assigned hearing dates are tentative and may have to be postponed by Planning Staff, Planning Commission, or the Assembly due to administrative reasons. Signature 'Agents must provide written proof or authorization. (Rev, 3/85) PO _ 3 R-7 41 ~ SL(~) --'65 SL(2) 05-65 / ,/'_ . (~) /3SL R-7 R-lO C. Please check or fill in the following: 1. Comprehensive Plan -- Land Use Classification ~ ~ Residential Commercial Parks/Open Space Transportation Related 2. Comprehensive Plan -- Land Use intensity Special Study 3. Environmental Factors (if any): a. Wetland 1. Developable 2. Conservation 3. Preservation Marginal Land Commercial/Industrial Public Lands/Institutions Dwelling Units per Acre Alpine/Slope Affected Please list any attachments: 1. Location Map (Required) 2. E. Proposed Special Limitations: (Use separate sheet if necessary.) 1. Alpine/Slope Affected Industrial Special Study b. Avalanche c. Floodplain _ d. Seismic Zone (Harding/Lawson} 1¢ Explai~ public ne/e~ and ustificadd'R~or the rezoniod~ ~ Explain\ihe pos~iv~ effect of thc/rezon'~g on the,¢/r~pert~ and the sz~un~ing property. ''"~""~ ,/4. Q~amoun~ev¢oped lan"~id"the general arraying the s'~a'~:~ng a~ G. Please indicate below if any of these events have occurred in the last three years on the property. Rezoning Subdivision Conditional Use Zoning Variance Case Number Case Number Case Number Case Number Enforcement Action For Building/Land Use Permit For H. The full legal description for legal advertisement (use separate sheet if necessary). T'~']--I-'*:~ ~' "-., . .-- ' .... ~ ;-- .' -- · .i · -~'..) ;,.-' .~ ~'~ ... , ~ ., ,' ¥.. . ~ · I. SUMMARY II. EXISTING CONDITIONS A. Area 1 B. Area 2 C. Area 3 D. General INDEX Skookum Knoll Industrial Highway Frontage Quarry III~ PROPOSED PLATTING A. Required Vacations B. Soils Studies IV. PROPOSED ZONING V. PROPOSED LAND USE A. B. C. D. VIo and Waivers Knight Industrial District Wallace Industrial District Quarry Industrial District Tracts C-1 and D-l, Skookum Knoll and McKinley Heights TRACT A-t QUARRY DEVELOPMENT Ao Demand B. Present Supply C. Tract A-1 Attributes D. Quarry Operation E. Economic Impact F. Reclamation- G. '^Summary 1 2 2 5 6 8 9 9 10 11 11 12 12 13 14 15 15 15 16 17 23 23 24 CHUGIAK INDUSTRIAL PARK MASTER PLAN Prepared for: M-B Contracting Co. Thillman Wallace William Knight Estate By: Alaska Land Development Services, 1401 West Thirty Fourth Avenue Anchorage, Alaska 99503 Phone (907) 258-2788 generally of platted but undeveloped lots of residential character, whose previous platting may not lend itself to future development. II. EXISTING CONDITIONS The parcels encompassed by this master I, with present zoning and topograph~ in Map No. 1. Thillman and Ella Wallace, including William Jernigan, Knight. Topography distinct areas. plan are listed in Table acreage; they are depicted, with The property is generally owned by though portions are owned by others, Steve Lund, and the estate of William and usage divide this site into three Ao Area 1 - Skookum Knoll The northeasterly 40 acres contains the bulk of Skookum Knoll Subdivision and also the three adjacent lots in McKinley Heights Subdivision which nominally rely on Skookum ILo. oil for access° These properties lie on the northwesterly facing shoulder of a ridge, southeast of which is a narrow valley and fault line separating this area from the Chugach Mountains. The lots are 200 to 400 feet higher in elevation than the Old Glenn Highway, from which they are also separated by 800' to 1000' horizontally. One parcel in this district, Tract B of Skookum Knoll, is the site of the Wallace home, accessed by a driveway in approximate m I. S UFRMARY The Chugiak Industrial Park Master Plan provides for the future development and land use of 100 acres located in the northeast quarter of North, Range 1 West, Seward Meridian. of real estate generally Section 20, Township 15 The property is found on the easterly side of the Old Glenn Highway, one mile north of its intersection with South Birchwood Loop. Map No. 1 (attached) depicts the existing site. The Plan includes 39 parcels of land held by several owners. Some of the parcels are presently used for manufacturing concrete, storing and servicing heavy equipment, manufacture and stockpile of winter road maintenance materials, and natural resource extraction. One of the tracts contains a single family residence, and 27 of the parcels are presently held without anticipated development. The owners propose to consolidate the 12 tracts presently involved in various industrial activities into three new tracts. In conjunction with this platting, they propose to redefine the allowed land use for these tracts from the present mix of undefined PC, R-5, and I-3SL(2) into modified I-1 and 1-3 usage through application of the Planned Community zone. The owners also propose to retain a major portion of the property as an undefined PC district. This particular area consists conforman'ce Knoll. This to the right-of-way dedicated by the plat of Skookum drive does not meet Municipal road standards and is not Municipally maintained. Lot 8, Block 1, Skookum Knoll, contains a remnant structure owned by William Jernigan, an ownership which preceded Wallace's thirty year involvement.with these properties. Lot 2 Block 1, owned by Wallace, contains a foundation only. Neither of these structures is habitable. Access to these two lots, and ten other adjacent lots and tracts, is by an overgrown trail which terminates approximately 300 feet short of the McKinley Heights Subdivision lots. The remaining lots in Skookum Knoll can be accessed via the Wallace driveway. The lotting in Skookum Knoll ~rovided for 22 lots and tracts sized between 0.3 and 0.9 acres. Several large tracts were also created for buffering and other uses. These parcels are zoned PC and, with no master plan ordinance at present in place to provide for land use, are technically not usable except for grandfathered purposes. Lots 4, 5 and 6 of McKinley Heights Subdivision were purchased by Wallace, and are incorporated in this masterplan because their potential access is through Skookum Knoll Subdivision. The remainder of the McKinley Heights lots, which are owned by others and not a part of this plan, are accessed from Amondson Road to the north, and can not physically be served through Skookum Knoll. McKinley Heights lots are zoned R-10. - 4 m Parcel: TABLE I Aria US Survey 3067: Lot 3 Lot 4 Lot 5A Lot 5B Lot 6 Lot 35 Lot 36 Lot 37 4 44 4 98 1 86 2 78 4 76 1 25 0 74 1 18 Ruben Wyatt Subdivision: Tract A 0 Tract B 0 .75 .84 Skookum Knolls Subdivision: Block 1-Lot 1 0 Lot 2 0 Lot 3 0 Lot 4 0 Lot 5 0 Lot 6 0 Lot 7 0 Lot 8 0 Tract F 0 Block 2-Lot 1 0 Lot 2 0 Lot 3 0 Lot 4 0 Lot 5 0 Lot 6 0 Block 3-Tract B 4 Lot 6 Lot 7 0 Lot 8 0 Lot 9 0 Lot 12 0 Lot 15 0 No Block - Tract A 30 Tract C 5 Tract D 9 Tract E 0 ac ~tc ac ac &c ac ac ac ac 59 ac 76 ac 48 ac 39 ac 36 ac 33 ac 39 ac 62 ac 29 ac 66 ac 66 ac 60 ac 65 ac 45 ac 65 ac 98 ac 50 ac 54 ac 51 ac 92 ac 70 ac 69 ac 90 ac 16 ac 46 ac 42 ac Present Zoning: 1-3 SL (2) I-3 SL (2) PC PC R-5/]?C R-5 I-3 SL (2) 1-3 SL (2) PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC PC McKinley Heights Subdivision Add #2 Block 2 - Lot 4 1.64 ac R-10 Lot 5 1.43 ac R-10 Lot 6 1.78 ac R-10 - 3 Klondike-Alaska, on behalf of the Wallaces and Knight Estate has undertaken gravel extraction a~Iprocessing activities throughout these eleven parcels, beginning in the 1960s. An additional parcel, Lot 2, USS 3067, is also involved in these activities but is not included in this master plan because the existing lot boundaries and zoning are appropriate to the present and anticipated usage. The usable aggregate from these parcels has been generally excavated, with an eye both to use of the rock products and to lessening of the elevation differential between the Old Glenn Highway and the properties, the work in will provide the site to Most of this regard has been completed. This master plan the basis for final excavation and regrading of prepare the area for future usage° Government Lots 3, 4, 36 and 37 are zoned I-3SL(2), which appears to permit any use listed among the permitted, accessory or condi- tional uses in the I-1 zone,, and also allows concrete manufacture. Government Lot 6 (Knight Estate), as mentioned previously, is split zoned R-5 and PCo The other parcels in this district are now zoned PC. C. Area 3 - Quarry The third distinct area of the property is the 30 acres presently identified as Tract A of Skookum Knoll, zoned PCo A canyon runs through the northerly third of this area, separating the majority of the tract from the Skookum Knoll lots to the north. The north B. Area 2 Industrial Highway Frontage Between the Old Glenn Highway and the lots in Skookum Knoll lie eleven parcels of industrial character which comprise the second area of the plan. These parcels represent some of the first patented entries in Chugiak and at one time contained many of the early business and residential activities in this community. Beginning by 1959, rock products have been extracted from this area, and concrete batching and manufacturing have been undertaken. Ail but two of the parcels in this 30 acre area have been a part of the Wallace business endeavors since their acquisition. The two parcels not directly involved by ownership in Wallace activity are Government Lots 6 and 35, fronting the Old Glenn Highway and running along the northwesterly portion of the master plan. These parcels are owned by the estate of William Knight and were used by Mr. Knight for natural resource extraction and other business enterprises. Approximately two acres of Knight's Lot 6 appear to have been inadvertently incorporated into Wallace's plat of Skookum Knoll, providing portions of tract D and lot 7 of Block 1, and bisecting the Canyon Drive right-of-way. This has also produced a split zone situation, the easterly portion of Lot 6 being PC and the westerly R-5. As a part of this master plan and replatting process these platting and zoning inconsistencies will be resolved. filling the canyon floor has covered the original creek bed, returning the stream flow to a subsurface condition through the remainder of Tract A. A small impoundment downstream on Lot 5A provides allocated water for gravel processing operations. The certificate of appropriation, ADL 44232L, cites continued use from 1968~ The stream leaves the property through a culvert under the Old Glenn Highway which has a gradient of approximately 15%, thereby eliminating any potential fish migration onto e-fZthe property. D. Genera% In 1979 a natural extraction permit was obtained for portions of the site on behalf of Wallace in conformance with Municipal ordinance changes requiring amortization of gravel pits. Perfor- mance of extraction operations appears to have departed from the original approved plan. In 1985, zoning districts were assigned to the various parcels across the site to perpetuate existing usages at the time of the area-wide rezoning program. The ordi- nance as finally approved may not have provided for all existing uses and appears to contain some ambiguity regarding permitted industrial uses. An agreement was reached with the Municipality in 1987 to provide for regrading of the area and extracting quarried rock from Tract A in anticipation of a Wallace plan submittal to bring permits into conformance with usage for the area° The Chugach Industrial Park Master Plan is that submittal. - 8 - wall of the canyon below Skookum Knoll is forested and extends upward 200' to 300' at a 1~1 sl6pe. The lots on the top of this slope actually face away from the canyon, to the northwest. An exposed rock face, forming the south wall of the canyon, reaches 200 feet in height at a slope of 1:2. The uplands south of the canyon form a knob with a thin overburden cover over bedrock. The Wallaces began mining talus gravels from this canyon in 1959 for their concrete products business. Initial quarrying operations, beginning in 1983, have removed portions of the southerly stone face of the canyon. Rubble from the quarry operation covers the canyon floor over approximately half its length. A spring rising in the easterly portion of the canyon marks the headwater of Parks Creek, the course of which lies through the canyon and then along the southerly boundary of the industrial portions of this master plan, crossing the old Glenn Highway in front of Lot 3 of USS 3067. The stream flow is insufficient to warrant Corps of Engineers permitting review. A previous owner of this property constructed several impoundment structures in the vicinity of the spring approximately forty years ago, reportedly in the interest of commercially rearing fish. The structures are now in disrepair but continue to provide physical barriers to fish passage at several locations over the first 300 feet of the stream flow. Quarry rubble highway easements on federal lands in Alaska resultad in an easement 150' in width from centerline of the existing road. We are requesting a vacation of all easement beyond the proposed rl=ht-oz-way dedication, a proposal recommended to us by the Alaska Department of Transportation and Public Facilities. We are also proposing vacation of portions of Bonanza Drive, Canyon Drive and Canyon Way adjacent to Tracts C and D of Skook~m Knolls and Government Lot 5, US Survey 3067, as well as a vacation of the utility easement adjacent to Bonanza Drive on the north side of Lot 5. Future access to Skookum Knoll will be along a more functional alignment along the south line of proposed Tract Ho Because there is no need or demand for public access into this area at this time, we propose the new alignment to be Secured to the owners of Skookum Knoll by private access easement, made by recording an easement document concurrently with filing of the plat. This will provide a controlled access situation both for Skookum Knoll and Jot proposed Tract A-l, the quarry site. To allow this, we are requesting a variance from the ordinance requirement for public right-of-way extension and the fronting of parcels on publicly dedicated rights-of-way. B. Soils Studies No new water consumption demand or need for wastewater disposal beyond existing systems is proposed as a function of this platting process. Therefore it is appropriate to defer detailed - 10 III. PROPOSED PLATTING Map No. 2 provides the proposed plat for those portions of the site which are presently in use and which can be expected to continue to evolve in the immediate future. This plat addresses only the non-residential property, providing for a reduction of thirteen existing lots and tracts, with associated right-of-way, into five tracts, two of which will function primarily as buffers. The proposed plat shown on Map ~2 will produce two parcels adjacent to the Old Glenn Highway, two parcels'buffering SkookuTM Knoll, and one parcel to the south of the project anticipated for quarry usage. Proposed Tract G, adjacent to the Old Glenn Highway, will be in Knight Estate ownership. Proposed Tract H, also along the highway, will remain the site of the Klondike/Wallace concrete and road maintenance operations. Proposed Tract A-1 is the existing quarry site, to be operated by M-B Contracting Company. Tract C-1 and D-1 will be warehoused with the Skookum Knoll and McKinley Heights lots. A. Required Vacations and Waivers As right-of-way along the existing road. easements, and other areas the Government Lot part of the replatting process, we propose to dedicate 50' of the Old Glenn Highway from the centerline of In places this exceeds the present highway will thereby provide additional right-of-way. In existing easements go beyond 50', particularly on 6, where a 1949 Public Land Order providing Knight Industrial District The first is the Knight Industrial District, to apply to Tract G. This classification shall include all uses as they are set forth in the I-1 district and shall also include natural resource extraction to the limits defined in Map No. 3 of this submittal entitled "Grading, Drainage, and Landscape Plan", or to alternative limits approved by the Department of Community Planning. This will provide for the final grading and reclamation of the to be light industrial in character. site for future use and allow that future use This grading plan calls for the upper limit ~cr .rcm~l-.--of approximately 200,000 additional yards of materia% f~.~{~ct Go Upon completion of extraction, all drainage channels and slopes over 6% will be reseeded with appropriate ground cover and maintained. Existing vegetation screening the site from the Old Glenn Highway will be retained wherever possible. Fencing will not be constructed until a site plan for redevelopment determines need and location. A thirty foot wide screening buffer with berming will be provided along the noth property line in Tract G. Bo Wallace Industrial District The second classification, Wallace Industrial District will apply to Tract H. This district shall provide for all uses as they are permitted in the I-3 district, and additionally shall provide for - 12 - soil studies. The site planning process necessary for. future redevelopment of these parcels, after grading is complete, will be the appropriate occasion for geotechnical analyses, rather than this platting action. IV. PROPOSED ZONING We propose to rezone all parcels in this plan to the Planned Community District. This rezoning will change the classification of approximately 30 percent of the property within the master plan, the other 70 percent was zoned PC in 1985. Use of the PC district will allow tailoring of land use definitions appropriate to the existing long term uses presently found within the industrial areas of the project, and provide for the amortization of the natural resource extraction occurring along the highway. It will also allow us to structure rules for proposed quarrying activities on a portion of the site and provide for the warehousing of the residentially oriented portions of the site. V. PROPOSED LAND USE Under the PC district, we are proposing three ][and use classifications to apply to those areas anticipated for present development. A fourth area will remain undifferentiated at this time. 11 D. Tracts C-1 and D-l, Skookum Knoll and McKinley Heights These properties will probably find future use as residential real estate. However, no immediate demand appears. Future development strategies will probably be a function of available services, and may call for a reassessment of the present small lot configuration. Because of the many independent security interests presently affecting title to these lots, reassessment and replatting is not an option now. Because .of the the northwesterly ground slope of this area it is naturally screened from the quarry site in Tract A-lo By retaining these lots in a holding zone, we have eliminated need for public assess. Title holders will have access through Tract H (see Map No. 2) over a route which can be developed at the time Tract H has reached a final grade or public access to a developing Skookum Knoll is warranted. ~Both vertical and horizontal separation, as well as natural tree cover, also mitigate impact. (See Figure A) The area is similarly shielded from Tracts G and H, with buffering areas in Tracts C-1 and D-1 established to retain tree screens where they now =cmain (see Figure B). natural resource extraction to the limits shown on Map No. 3 of this submittal or to alternative limits approved by the Department of Community Planning. This will allow continued operation of the Klondike/Alaska Concrete plant in its historic manner, including open stock piles, and the equipment storage, maintenance and sand stockpiling necessary for Klondike's R~ad maintenance work. This grading plan calls for the upper approximately 240,000 additional yards of material from Tract H. Upon completion of extraction, all drainage channels and slopes over 6% will be reseeded with appropriate ground cover and maintained. Existing vegetation screening the site from the Old Glenn Highway will be retained wherever possible. Fencing for security and screening will be constructed at the finished grade. C. Quarry Industrial District limit for removal of The third land use classification proposed by this masterplan is the Quarry Industrial District, designed to apply to Tract A-1. This district shall provide for all uses as they are permitted in the I-3 district and additionally shall provide for natural resource extraction by quarrying under the conditions set forth in this submittal and to the limits shown on Map No. 3 or in conformance with alternative conditions and limits approved by the Department of Community Planning. Conditions for quarry operation are set forth in VI. TRACT A-l: QUARRY DEVLOPMENT. 13 Tract A-1 Attributes The Chugiak quarry is 17 miles from Anchorage. The location is not only relatively close but the haul route is safe and only minimally disruptive to area neighborhoods and traffic patterns° Trucks will enter directly onto the Old Glenn Highway, then to Birchwood Road, .travelling 1.8 miles to the New Glenn Highway. This is the arterial route which has been used by Klondike/Alaska mixer and gravel trucks over the last twenty years. The total truck volume will be relatively low. Annual demand for quarry stone i~ the Anchorage'area has been less than 50,000 tons per year° The site may be competitive in the fill and crushed material market on the north side of Anchorage and the Eagle River/Chugiak area° However, in many applications rock fill is not suitable because ~of workability and cost. These factors combine to limit'the estimate of demand for material mined from the source to approximately 150,000 tons a year, without special projects. This annual volume is very small compared to the millions of tons per year handled through roads adjacent to terminals in the Anchorage bowl. Tract A-1 is a nearly ideal site for a quarry for the Anchorage Municipality. The area consists of a hidden, natural rock face nearly 200' high with steeply sloping ground above, culminating in a relatively flat area at the high point° Five million tons - 16 - VI. TRACT A-1 QUARRY DEVELOPMENT A. Demand Development of the Anchorage waterfront, coastal trail, and rehabilitation of area creeks required over 200,000 tons of quarry stone as .riprap in the last five years. The continuing development of the waterfront for port expansions, military facilities, and community improvements will always be the Anchorage scene. Plans for additional coastal creek rehabilitations are in place. a part of trail and B. Present Supply At present, there is no permitted source of Municipality of Anchorage. The only sources erosion protection projects are in Anchorage. The long hauls make quarry the Anchorage market, with half of the distance the material must be hauled. trucks is required to haul material delivery rate when the haul is significant amount of traffic and already congested. quarry stone in the of quarry stone for Palmer, 48 miles from stone very expensive in cost attributable to the Also, a large number of to a project at an acceptable long. The trucks add a wear to highways which are - 15 ~ Approximately 15,000 tons of stone would be shot at once, requiring ten shots per season° A 50 foot naturally vegetated buffer will be retained around the property. Work areas will be cleared and stripped to bedrock in phases depending on anticipated demand for product° Tree trunks will be disposed of as firewood. There is little or no stripping material on top of the bedrock in most' of the quarry area. Stripping debris generated will be stored in the sout~¢est corner of the property for later use in rehabilitation. Once stripped, blasthole drilling will begin on the bare bedrock surface. D.rilling and blasting will be planned and executed to develop the bench elevations on the typical quarry development section (see Figure A). Effective controlled blasting uses a face to control vibration and benches to control rockfall and provide access. Holes are drilled in the rock to allow placement of explosive. These holes are sized and placed to distribute the explosives through the volume of rock to be shot~ The hole size determines the quantity of explosive used in the blast, controlling the breakage produced by the blast. The blast cracks the stone into workable pieces. Very little a'flyrock"'~is thrown in a quarry blast. The desired breakage into large rock sizes requires minimal explosive energy° 18 - of stone are estimated to be in place within the proposed development limits. The site is not seen from roadways in the zmmedza_e area. While the present face is visible and was visible in its natural state from some locations in the Birchwood Loop area, the amount of face visible will diminish as the quarry is worked to below the ridgeline at the west side of the property. The noise and dust produced by past work in the quarry ~s comparable to that expected in the future, and have not been noticed outside of the Wallace properties because of the valley's narrow mouth and high walls. D. Quarry Operation Quarry stone is produced by blasting bedrock, then sorting and processing the resulting loosened pile. The production of quarry material consists of five steps: a. drilling; b. blasting, c. sidecast, d. sorting/blasting, and e. load out. The plan of operations for Chugiak quarry calls for the annual production of approximately 50,000 tons of riprap, stones weighing between 200 and 3000 lbs. Production of this annual volume of riprap will require drilling and blasting approximately 150,000 tons (70,000 CY) of bedrock. 17 Average powder factor for production of riprap at Chugi~k quarry is .600 lbs. of explosive per ton of bedrock. Approximately 10,000 lbs of explosives would be used per shot. No commercial explosive storage facilities are presently located in the Municipality of Anchorage. However, no/,~xplosives will be stored on-site -during periods of inactivity. Ail explosives needed for single shot will be delivered after drilling is complete, on the day of the shot. Magazines for storage of small quantities of carryover powder and caps from one shot will be built on-site at a sheltered, inaccessible location (see Map No. 2) in conformance with Explosives for quarry operation will be handled according to A.T.F. (Federal Alcohol, Tobacco, Firearms) regulations on the quarry property. Ail personnel handling explosives will hold a State of Alaska blaster's license. Explosive handling will be limited to a small crew with changes in personnel limited as much as possible. Intrusive overland access to the quarry is limited by the nature of the terrain. Also, a security fence will surround all working areas. Visibility from the high portions of the property mak~e · it difficult for an lntruderAenter the property undetected. ~m~.~r, the upper and lower areas of the quarry site throughout 20 - Certain uses of quarry stone require certain sizes of rock. If the use is riprap and 1500j rock is desired, sorting is by a bar grizzly or slotted loader bucket. If the use is driveway surfacing the material is screened to remove all pieces larger than 12" ~ then run through a crusher. crushed to meet t-~es~.~requirements. Material is sorted or After a shot, the material produced will be sorted size ranges. These size ranges would generally be: over 1500 lbs. 200 lbs. to 1500 lbs. under 200 lbs. into three Material riprap or ornamental boulders. either be processed directly into stockpiled. If stockpiled, this be sold as product. in the first two classifications is intended for sale as The last classification will a crushed aggregate product or small gradation material would rock fill or processed for sale as a crushed aggregate Stockpiles and material processing within the existing quarry floor or removal of material from the quarry° bel~tockpiled separately in open piles. equipment will be located on new area created by The various products will - 22 ~ its perimiter will also be patrolled on foot prior for unauthorized persons on the quarry property. to every shot Standard blasting warning signals will be used at the quarry. These are signals sounded with a loud air-horn, as follows: Warning five minutes before shot: one minute series of long blasts Warning one minute before shot: series of short blasts Ail clear: One long blast after inspection of the blast area. Signs describing the blasting signals will be posted at the upper and lower access points and along the upper edge of the property for persons entering the area. Once broken, the rock is sidecast blasted. The material rolls to the pushed off by a backhoe or bulldozer. is ready 'for sorting or processing. off the ledge upon which it was quarry floor after being At this point the material The production of riprap involves sorting specification size stone from the material loosened by a shot. A yield of 30% specification size stone from the total amount of bedrock loosened is a typical outcome. 21 - work .area. The existing arrangement is stable and clean. Leaving the existing fill in place as long as the quarry is in operation appears to be the least disruptive option available. When the quarry ceases operation the creek channel can be restored. Present regulations call for a 50 foot buffer around Parks Creek. A channel will be excavated and stabilized. Banks adjoining the creek will be topsoiled and seeded. Trees will be established to restore the 50 foot buffer area. Restoration of the quarry area will involve cleaning and trimming the quarry slopes to present a neat, safe, and natural area° The quarrM flo~r will be topsoiled and seeded with a wild grass and flower mix leaving a smooth, well-drained area. G. It is difficult to imagine a more ideal location for a quarry within the Anchorage bowl. The quarry site is not visible from any existing roadways in the area. There are no neighbors immediately adjacent. Noise and dust from operations is contained in the tight confines of the narrow valley and quarry amphitheater. The shot sizes, powder factors, and storage plan proposed are identical to those used to date in development of the quarry° Blasting involved to date has gone on virtually unnoticed° 24 Haul routes in and out of the quarry will be watered when dusty occur 'r-e~.~ " All blasting operations will be limited to the hours from 6:00 a.m. to 6:00 p.m. E. Economic Impact The equipment fleet used end loaders, a dozer, a backhoe, equipment, drill and compressor. men on a full time basis in the hauliqg work for truckers and will the adjacent concrete and road employ - 2'O\pe'o~ le. at Chugiak Quarry ~ill consist of front sorting, screening and crushing The operation will employ __ quarry. It will also provide provide a material source to maintenance businesses which F. Reclamation Past operations have filled a section of the valley floor immediately adjacent to the quarry face. Creek flows presently run through the quarry area entirely underground. The clean course rock from the quarry easily passes creek flows at all times of the year. Work required to re-establish the Parks Creek channel in the existing work area would create high turbidity and an unstable channel. If opened, the creek channel would severely confine the 23 Safety and security are integral parts of the blasting Operation. Modern safe explosive materials stored in secure magazines and used according to manufacturers recommendations have an excellent track record. Present sources of quarried stone operate intermittently, have no taxable permanent facilities and produce, stone with relatively poor aesthetic and physical properties. Providing for land use allowing continued operation of the Tract A-1 quarry will allow development of permanent facilities providing employment to area residents, a small but significant addition to Anchorage's tax base and Chugiak's economy. Continued use of this quarry will also- provide an economical source of high quality quarry stone for the Anchorage area. 25 - ANCHORAGE AREA Department of Environmental Quality 3330 C Street Anchorage, Alaska 99503 INSPECTION REPORT ON-SITE SEWAGE DISPOSAL SYSTEM LOCATION MAILING ADDRESS '~7~()~' ~)"~n~/~ (~?J~//-~' PHONE LEGAL DESCRIPTION ~-~f~gT/~/;~ SEPTIC TANK: DISTANCE FROM WELL INSIDE LENGTH MANUFACTURER /~C//.~//~(-'~' MATERIAL NUMBER OF COMPARTMENTS INSIDE WIDTH LIQUID DEPTH LIQUID CAPACITY //-~(~' GALLONS. SEEPAGE Pit: / '2///////2(~/~ NUMBER Of PITS / DIAMETER __OR WIDTH LENGTH DEPTH LINING MATERIAL ~/'~t~ ~ CRIB SIZE: DIAMETER,¢~,~ DEPTH ~/~ DISTANCE FROM: WELL /~')/~ BUILDING FOUNDATION¢/~, ) TOTAL EFFECTIVE NEAREST LOT LINE /~ ABSORPTION AREA (WALL AREA) ~)~2~'~- SQ. FT. ADDITIONAL ABSORPTION WELL: TYPE P~//~'~ CONSTRUCTION DEPTH DISTANCE FROM: BUILDING NEAREST NEAREST SEPTIC SEEPAGE FOUNDATION LOT LINE SEWER LINE TANK SYSTEM CESSPOOL OTHER SOURCES APPROVED__ DISAPPROVED REMARKS DISTANCES: INSTALLED BY: PIPE MATERIAL: DIAGRAM OF SYSTEM LOT SLOPE: REMARKS: Form NO. EQ-031 DATE GReATEr ANCHORAGE Area BorOUGH DEPARTMENT OF ENVIRONMENTAL QUALITY 3330 "C" STREET ANCHORAGE, ALASKA 99503 TELEPHONE 274-4561 SEWAGE DISPOSAL SYSTEM -- APPLICATION AND PERMIT PERMIT NO. PHONE SOiL TEST RESULTS /~__5~'~2~ /~-~7~ .~~J~2 NOTE: THIS PERMIT IS NOT VALID WITHOUT SOIL TEST COMPLETION DATE ANTICIPATED /J,~J ~ FINAL INSPECTION: 24 HOUR NOTICE REQUIRED. BACKFILLING OF ANY SYSTEM WITHOUT FINAL INSPECTION bY TI DEPARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL BE SUBJECT TO PROSECUTION, SEPTIC TANK SIZE,J~'~ TYPe ~~/~Z~J~j/~- SEEPAGE AREA SIZE ~J ~ TYPE FOUNDATION TO SEPTIC TANK TO NEAREST LOT LINE. WELL TO SEPTIC TANK WATER MAIN TO SePTiC TANK DRAIN FIELD TO RIVER. LAKE, STREAM. SEEPAGE Pit .~- d ~' SEEPAGE ALSO CONSIDER A~EA WELLS. SEEPAGE Pit ? ~/ DRAIN FIELD CAST IRON INTO AND OUT OF SEPTIC TANK AND INTO CRIB CROSSING GAP OF EXCAVATION 5 Feet INTO UNDISTURBED SOIL. 4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE PIT FITTED WITH AIRTIGHT REMOVABLE CAPS, GRAVEL BACKFILL CONFORM TO BOROUGH REGULATIONS REGARDING INSTALLATION. OR DIAGRAM OF SYSTEM I CERTIFY THAT [ AM FAMILIAR WITH THE REQUIREMENTS OF GREATER ANCHORAGE AREA BOROUGH ORDINANCE NO. 28-68 AND THAT THE ABOVE /4h?q}~l~x~A GREATER ANCUORIk(X AREA BOROUGll I~l!~!~!,td~*'?l',H 3330 "C" Street ~/ Anchorage, Alaska 99503 SOII,S I,O(l - PEROI,ATION TEST ~ -- Da te Performed for ~/D ~ ~ ~ ~ .... ~-~ ~/Performed This form reports:- Soils~og .~ · _ ~ercolatiOn' l~st 5- 6- 7- 8- 9- lO- ll-' 12- Was ground water en¢oun~ere _=,4~(_~0___.__ If yes. at what depth? Reading Da te Gross Time P-e-~-O-~-a t i on r ate ..... ?,{i~-~-e-.- --- Net Time Dep_t~n to W~atev .... __ , 1. ---____i----ii--_L__ Net Urop -Proposed installa~-T~-n-:' Seepage Pit Drain Field .......... :--.. ~ of Inlet '. Deptl]--t~'-b-6~t~--o:f-'Pit or tre~c~ __~__ ..... ~ ...... COMMENTS: /~6 ~.~f. ~1, - ~Y-~-'~-~ ........... //