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HomeMy WebLinkAboutpitkin.eh.264514300014 (2001)Permit # 01057 Pitkin County Environmental Health Department Permit for an Individual Sewage Disposal System 130 S. Galena St., Aspen, Colorado 81611 Phone 970-920-5070 / FAX 970-920-5074 Parcel ID # 2645-143-00-014 Type of permit New( x ) Repair( ) Addition to House( ) Name of Owner Kelly H Street Address Rabbit Property legal description Size of lot 1 acre Water source Private well # of bedrooms in house Caretaker unit N/a Shield -O -Mesa Lot 14, Shield -O -Mesa Total square footage of the house 3500 sq ft # of offices, lofts & similar sized rooms in house Total square footage of the caretaker unit # of bedrooms in caretaker unit # of offices, lofts & similar sized rooms in caretaker unit Designed for what # rooms (list) 3 bedrooms Permit information Designed by Church and Associates Mailing Address 4501 Wadsworth Boulevard Wheat Ridge CO 80033 Perc rate 31 Profile hole depth 8 ft Depth to groundwater or bedrock Greater than 8 ft Minimum Septic tank capacity 1312 gallons Minimum Absorption area 584 sq ft w/ 50% reduction Cnmments Septic permit approved per compliance with the engineer design and specifications dated August 16, 2001. Any changes must be approved by this department and the design engineer prior to them being made. Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County ISDS regulations. There must be a 104 foot setback from the well to the absorption field. The irrigation ditch must be lined where the distance to the absorption field is less than 54 feet. This system will consist of one 1500 gallon two compartment tank with an effluent filter on the outlet. There will be a flow splitter basin with 3 outlets. The absorption field will consist of 3 trenches, each having one row of 13 chambers for a total of 39 chambers. There must be at least 6 feet of undisturbed soil between each trench. Any angles in the trenches will use 15 degree Infiltrator Contour wedges. This department does not endorse any brand of products. This permit must be kept on-site during installation. The engineer must do a final inspection of the installation and submit an as -built letter to this department. This department must also be called for an inspection with a minimum of 48 hours advanced notice. Permit approved by: Date: Plans and specifications of the proposed individual sewage disposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was issued unless system construction has commenced or an extension has been approved in writing by the Department. As -built drawings must be included with this permit before the final approval will be issued. oy Installer: �Y Fimal inspectio approval: Date: 1-6 �— phone 970-920-5438 fax 970-920-5077 0405 Castle Creek Rd, Aspen CO 81611 e-mail carlab@ci.aspen.co.us Fmc To: Jeff Mann From: Carla Block Fax: 927-2537 Pages: 2 Phone: Date: 8/28/01 Re: septic permit CC: Tim Petr ❑ Urgent 0 For Review ❑ Please Comment ❑ Please Reply ❑ Please Recycle If you have any questions regarding this permit, please give me a call. Thank you, Carla Pitkin County Environmental Health Department Permit for an Individual Sewage Disposal System 130 S. Galena St. Aspen, Colorado 81611 Phone 970-920-5070 / FAX 970-920-5074 Permit # 00035 Parcel ID # 2645-143-00-014 Type of permit New( x ) Repair( ) Addition to House( ) Name of Owner Kelly Hayes Street Address Rabbit Way, Shield -O -Mesa Property legal description Lot 14, Shield -O -Mesa Size of lot 1 acre Total square footage of the house 2720 sq ft Water source Private well # of bedrooms in house Caretaker unit N/a 3 # of offices, lofts & similar sized rooms in house Total square footage of the caretaker unit # of bedrooms in caretaker unit Designed for what # rooms (list) 3 Designed by Church and Associates # of offices, lofts & similar sized rooms in caretaker unit Permit information Mailing Address 4501 Wadsworth Blvd, Wheat Perc rate 39 mpi Profile hole depth 8 ft Septic tank capacity 1500 gallons e, CO 80033 Depth to groundwater or bedrock Absorption area 930 sq ft Comments Greater than 8 ft Septic permit approved per compliance with the engineer design and specifications dated June 1, 2000. Any changes must be approved by this department and the design engineer prior to them being made. Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County ISDS regulations. Setback from the absorption field to the property line must me a min of 10 feet. Setback from the absorption field to the well must be a minimum of 104 feet. The system will consist of one 1500 gallon two-compartment tank. The absorption field will have three gravelless beds, each bed having 2 rows of 13 Infiltrator chamber units. There must be a six foot separation between each bed. This department does not endorse any brand of products. The engineer must do a final inspection of the installation and submit an as -built letter to this department. This department must also be called for an inspection with a minimum of 48 hours advanced notice. Permit approved by: `�k l C l�U� Date: i Plans and specifications of the proposed individual sewage disposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was issued unless system construction has commenced or an extension has been approved in writing by the Department. As -built drawings must be included with this permit before the final approval will be issued. Installer: Final inspection approval Date: ASPE*KIN ENVIRONMENTAL HEALTH C ARTMENT APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM 130 S. Galena St., Aspen Colorado 81611 Phone 970-920-5070/Fax 970-920-5074 Name of OWNER Kc- 1- z -S Owner's Mailing Address ak ��-S y io��� Business Phone: rl 0 - a\7-5 -?z �,K Home Phone: CA 10 -- C,, Z l Primary Contact Person (all communication regarding this permit will go through this person) Name Company o V)vl Contact Mailing Address to Business Phone: ��63. -ttIA SITell Phone: "1`\ opl— -493-1 ro,-A Parcel ID # (available from assessor's office at 920-5160 or at www.aspen.com/assessor/) �- — Street address of property Legal Description: Lot Block Filing V L Size of lot: �_ acres. Type of proposed structure: n a` }- S Total square feet of house (?_ v # of bedn # of offices, lofts & similar sized rooms in house _ Caretaker Unit: Attached ( ) Detached ( ) Total ai # of bedrooms in caretaker unit # of offices, lofts and similar size rooms of caretaker unit Permit is for: New Home (�) Repair due to failure ( ) Remodel/Addition ( ) Emergency use ( ) Water: Private well (x ) Spring ( ) Stream ( ) Community/Public Water System ( ) If community system: Name of system The fee for a ISDS application is $330 for a permit that takes 6 hours or less for the department to approve. If approval takes longer than 6 hours, a rate of $55 per hour will be charged. The maximum fee is $1000. The basic fee of $330 is due at the time of application. The remainder, if any, will be due in two stages: first, at the time of issuance of the ISDS permit; second, before final approval of the ISDS permit. Application for an individual sewage disposal system is hereby submitted. I hereby certify that the above information is true and accurate and that I have provided true and accurate information on locations of all existing and proposed wells, contour intervals, buildings, property lines, ditches, slopes, waterlines, springs, suction or irrigation lines, drinking water cisterns, drain tiles, irrigation ditches, lakes, water courses, streams, floodplains, dry gulches, and existing septic systems. I hereby certify that any such features not shown on attached site map are not present. Issuance of the permit does not imply the approval of any other permit required for construction pursuant to Pitkin County codes. No construction may be undertaken until all approvals and permits have been obtained. The Aspen/Pitkin Environmental Health Department, Pitkin County and employees of these agencies will be held harmless should the individual sewage disposal system fail or malfunction. The permit to construct is issued on information submitted by the applicant or his/her representatives. The owner assumes full responsibility in case of failure of the system. 1 11 Signature of applicant AV - Date E =5' U v Received by Receipt # !� Date I, G:\eh\isds\isdsapp.do . � NNW < CHURCH & Associates, Inc. ENGINEERS & GEOLOGISTS June 18, 2002 Kelly Hayes 7274 Upper River Road Woody Creek, Colorado 81656 Subject: Installation Observation, Proposed Hayes Residence Lot 14, Shield -O -Mesa Pitkin County, Colorado Job No. 12475W Mr. Hayes, As requested, we observed the installation of the onsite wastewater system (OWS) for the subject site on November 6, 2001. The system was designed under our Job No. 12475W, dated June 1, 2000, and revised August 16, 2001. The system includes the installation of a 1500 -gallon, two-compartment, precast concrete septic tank with an effluent filter on the outlet, and three chamber -trenches. Each trench has one row of thirteen chambers for a total infiltrative area of 605.5 square feet. An as -built drawing is included as Figure 1. There is a non-active ditch existing 10 feet from the drain field. The source of water to the ditch has been eliminated. Surface runoff to the ditch has been effectively diverted upgradient from drain field by backfilling the ditch and compacting with onsite material. From information provided, it appears the ditch will not transport water and will not impact the drain field performance. Our office must be contacted in any water is observed in the ditch. The components of the OWS were installed in conformance with our plans and specifications. Our installation observations do not imply a guarantee or warranty of materials or workmanship. If there are questions or if we may be of further service, please call. CHURCH and Kp.Q••.�•p® 29994 Joseph C. Kordziel, P.E, -c , JCK/trp 2 copies sent copy to PCEHD, Attn: Norm Marrah, FED EX DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4358 303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455 LOVELAND 970.663.2124 WESTERN SLOPE 970.948.5803 0 ACRE )T 14, SHIELD -0 -MESA TKIN COUNTY, COLORADO 3B NO. 12475 m WELL. ` `9 19 10' SETBACK FROM NON-ACTIVE DITCH 604.5 SF OF INFILTRATIVE AREA IN 3 GRAVELLESS `TRENCHES. EACH TRENCH HAS 1 ROW OF 13 Al CHAMBERS FOR A TOTAL OF 39 CHAMBERS. BACKFILLED WITH ONSITE MATERIAL AND COMPACTED ONE 1600 -GALLON, TWO-COMPARTMENT, PRECAST CONCRETE SEPTIC TANK WITH AN EFFLUENT FITLER ON THE OUTLET SCALE V 30' FIGURE 1 May 24 00 03:07a CHURCH a Rssocaties 303-463-9321 r i iF Qv �©�tS cAQ-. M� �F oTz No�t�owuE� C-�M)5�tg sgo3 9 �ib . Z5, CobCfl3 SNvt-u 3NiELrD-o - tgEsA �� 9 .Ci2S,`zsis W A�- � W og roj f� .l P.2 T J j Y w cJ p N Q � o � v VI) A 4l O P.2 J j w 3 3 � v VI) A 4l O Qx Q a Q � � w V3 O P.2 Tim Petz, 11:23 AM 08/24/200*elly Hayes Test Pit From: Tim Petz <tpetz@geo-church.com> To: "'carlab@ci.aspen. co. us"' <carlab@ci.aspen.co.us>, "'nancym@ci.aspen.co.us"' <nancym@ci.aspen.co.us> Subject: Kelly Hayes Test Pit Date: Fri, 24 Aug 2001 11:23:14 -0600 X -Mailer: Internet Mail Service (5.5.2448.0) We are relocating the OWS for the Hayes Residence. We have new test pits and percolation holes ready for inspection. This is a residence that has been permitted. I am faxing you a map (carla) just like old times! See me with Questions. Lot 14, Shield O mesa. Printed for Carla Block <carlab@ci.aspen.co.us> Page 1 of 1 08/24/2001 y ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPARTMENT ISDS DESIGN CALCULATIONS Owner's Name 'Hayes, Parcel ID # a " House Size (sq. ft.) (75 gpd, 100 gpd, or 130 gpd) 100 Number of Bedrooms in Main House'' Number of Offices, Libraries, Studies, Similar -sized Rooms in Main House Number of Bedrooms in Detached Caretaker unit Number of Offices, Studies, Similar -sized Rooms in Caretaker Unit (If the caretaker unit is ATTACHED, treat as if part of main house.) Average Daily Waste Flow 600 State Review Required? no Perc Rate 31 (T) Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.75 Q= 1050 Absorption Area (=Q/ 5 X SQRT perc rate) A = 1169.2305 sq. ft. of absorption area required 75 graveness chamber units without reduction # of Perc Holes Required: 3 1 in every soil type? Spaced uniformly over proposed area? A maximum 30% reduction is allowed for use of deep gravel or gravelless chambered system, only if the lot size and soil conditions are optimal. If a reduction is being proposed, describe why lot size and soil conditions are optimal: A = 818.46136 sq.ft. w/30% bed reduction 584.615258 sq.ft. w/ 50% trench reduction 53 graveness chamber units 38 graveness chamber units Type of system: []Absorption trenches []Absorption bed [] Graveness chambers []Dry well []Seepage Pit []Other (type) Minimum tank capacity 1312.5 gallons SETBACK FROM WELL # of feet = 104 SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 54 SETBACK FROM DRY GULCH # of feet = 29 Printed on Recycled Paper CHURCH & Associates, Inc. ENGINEERS & GEOLOGISTS August 16, 2001 Kelly Hayes 7274 Upper River Road Woody Creek, Colorado 81656 Flo„ �31o�..k Subject: SubFdrf. ,e i7 ZlLlgativii and ReVISed ON'E'S Deslgi<, Proposed J aye Iesidence Lot 14, Shield -O -Mesa Pitkin County, Colorado Job No. 12475 Mr. Hayes, As requested, we have investigated subsurface conditions and &esigned a revised onsite wastewater system (OWS) for the proposed residence. The revision is based on a new location of the drain field, from our original design dated June 1, 2000. All previous designs should be discarded to avoid confusion. Our firm investigated subsurface conditions on May 24, 2000 and August 15, 2001. SITE CONDITIONS The property is located in a rural residential area in Pitkin County, where OWS are required. The proposed drain field area has a 20% slope to the northeast and has a thick cover of native grass with a few scattered trees. The residence is served water by an onsite well, located 104+ feet from the proposed OWS. PROPOSED CONSTRUCTION The proposed residence will have tree bedrooms;within a living area of 3500 SF. We have sized the OWS based on 3 bedrooms and 600 Gallons Per Day (GPD) using Aspen/ Pitkin Environmental Health Depart- ment (APEHD) loading of 100 gallons per day per person. The sewage loading with a peaking factor of 1.75 is 1050 GPD. This loading includes washing machines and a garbage grinder. SUBSURFACE CONDITIONS A second subsurface investigation was performed with one profile pit and 3 percolation holes (P-4, P-5, and P-6), 30 to 37 inches deep, at the locations indicated on Figure 1. Subsurface conditions encountered in the profile pit consisted of 2 feet of topsoil, underlain by silty, sandy, clay to 6 feet, underlain by very fractured Mancos "e to 7 feet, underlain by Mancos shale bedrock to the maximum depth explored of 8 feet. Ground water was not observed. Percolation tests indicate percolation rates of 20 to 53 minutes per inch (MPI). The average percolation rate is 31 MPI. Percolation data is presented in Table 1. RECOMMENDATIONS The installation of a septic tank, a flow splitter basin, and three chamber -beds is proposed at the locations presented on Figure 1. The OWS design is based on an average sewage load of 600 GPD and a percolation rate of 31 MPL The installation must include one 1500 -gallon, two-compartment, pre -cast concrete septic tank with an effluent filter on the outlet, and three chamber -beds. Each bed must have 1 row of 13 chambers DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4358 303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455 LOVELAND 970.663.2124 Subsurface InN _ igation and Revised OWS Design Job No. 12475 Page 2 for a total of 39 chambers. The trenches are angled using a 15 -degree Infiltrator® ContourTM Wedge. A flow splitter basin is required to distribute effluent throughout the fields. Vehicle movement over the drain field trench area during construction should be kept at a minimum to prevent compaction of the receiving soils. The bottom of the bed should be scarified with a pick, shovel, or backhoe bucket teeth prior to the addition of dispersal gravel. The surface of the field should be seeded after installation of the fields. We recommend using a native seed mixavailableat seed stores. These mixes do not require irrigation and develop a growth 10 to 15 inches high INV QiitV111at1\i AJpruuder Sy LeM J11Vuld be 1t1J ailed V Ver Llle 1�1e1dJ. OPERATION AND IVIAIN'ITEN_ANCE The owner must realize an OWS is different from public sewer service. The owner must be aware of and assume responsibility for maintenance of the system. In the absence of a monitoring program, we recommend the septic tank be pumped every two years. Effluent filter and screened vaults, as applicable, are to be cleaned during pumping. There are daily considerations such as not putting plastic or other nonbiodegradable materials into the septic system. Garbage disposal use should be minimized. The backwash of a water softener may be harmful to the OWS. A separate drywell should be constructed for the backwash waste, if a softener is installed. Chemically treated water from a swimming pool or spas should not be introduced to the OWS. LIlVIITATIONS An OWS design should be installed by a contractor who is experienced in its installation. Our investigation, layout, design and recommendations are based on data submitted. If subsurface conditions considerably different from those described in this report are encountered, we should be notified to evaluate the effect on the proposed OWS. If the health department makes modifications to this design, we should be contacted to evaluate the impact on the performance of the OWS. The county and our firm must be contacted for construction observation of the OWS All construction is to be in accordance with the ISDS regulations. Pipe type and size, burial requirements, septic tank construction, and other specifications, which are not depicted in our report, are to conform to the requirements of the ISDS regulations. The installer of the system is to have demonstrated knowledge of the APEHD ISDS regulations and requirements. If there are questions or if we can be of further service, please call. The project engineer is Tim Petz. CHI Ed,A EOC/trp/erb 3 copies sent, via Fed Ex, to arrive on Monday 20t'' August. 1.0 ACRE LOT 14, SHIELD -O -MESA PITKIN COUNTY, COLORADO ONE 1500 -GALLON, TWO-COMPARTMENT, PF CONCRETE SEPTIC TAN EFFLUENT FITLER ON 1 4" SC MUST DRIVE JOB NO. 12475 SCALE 1 " = 30' E LINED J FIELD .5 SF OF INFILTRATIVE AREA IN 3 GRAVELLESS LACHES. EACH TRENCH MUST HAVE I ROW OF :HAMBERS FOR A TOTAL OF 39 CHAMBERS. NCHES ARE ANGLED USING 1 150 INFILTRATOR® TOUR- WEDGE. 8/16/01 FIGURE 1 1c TYPICAL PLAN VIEW - N.T.S. 4" PVC LINE 4" PVC EFFLUENT INLET (1/8" PER FOOT DROP) FLOW SPLITTER TYPICAL CROSS-SECTION - N.T.S. ACKFI LL 4' EXTENT OF EXCAVATION GRAVELLESS CHAMBER 3' BY 6.25' TOTAL - THREE TRENCHES 4" SDR 35 PVC OBSERVATION/VENT PIPE WITH CAP ' MiN. SLOPE FOR MIN.— Rq/ NgGE �-�. 1.5IN GRAVELLESS CHAMBER 3' BY 6.25' CALCULATIONS AND SPECIFICATIONS DESIGN CRITERIA RESIDENCE - 3 BEDROOMS, 2000 - 6000 SF LOADING - 100 GAL/DAY/PERSON TOTAL LOADING - 600 GPD PERCOLATION RATE = 31 MPI AREA = ((1.75 X 600) X sqrt 31)/5 =1169 SF 50% REDUCTION FOR TRENCHES = 584.5 SF JOB NO. " ," CONTOUR- WEDGE FLOW SPLrrrER BASIIV FOR GRAVITY FLOW EFFLUENT TOP VIEW 4" SDR 35 PVC OBSERVATION/VENT PIPE 6.25'. M#2 ELD #3 0 3t SIDE VIEW FIBEFOLA88 LID VIITFH AWLM STEEL BOLTS 6 UPETHME GASKET. FINAL OFIAD 18' 1 FUSSED PVC BASIN 4" • PNC DISCHARGE PIPE 4'PVC MFLUENTFROM 4 008M0 TANK EFFLUENT DISCHARGE, Ot MSTALL'SPEED LEVELER TRENCH SPECIFICATIONS TREATMENT UNIT SPECIFICATIONS NUMBER OF TRENCHES - 3 TOTAL MINIMUM CAPACITY - 1.75 X q X (30 HOURS/24 HOURS) LENGTH OF EACH TRENCH - 81.25 FEET, 13 CHAMBERS = 1312.5 GALLONS WIDTH OF EACH TRENCH - 3 FEET, 1 CHAMBER RECOMMENDATION - ONE 1500 -GALLON, TWO-COMPARTMENT, TOTAL NUMBER OF CHAMBERS - 39 CHAMBERS PRE -CAST CONCRETE SEPTIC TANK WITH AN EFFLUENT FILTER TOTAL AREA - 604.5 SF ON THE OUTLET. DRAIN FIELD DETAILS o tb/ul T M Lu W Z Wcr- E = COA p CD N Z N v Z l c u , LL - J� g m a Ua8 a coin W _ CO N 01 C p O W W u Cr w 0 J N.7 ai -0-0p �+ cn O Y vv y x O m rn p p C7 C 3 0-00 O+ U C o Ul O f] v7 �- C If Q oy �o-'E Uv ¢ o o U w cn �w � nv =v E v0u c o v Ez > w a LLU m Z LL- � LL U- J C (/ `• V Q r iTLa� ui_ _..... �..�.__....._ .............. �. . Cd •�= o f o o cv w Z V W w N a a' N �� 0� w 1— a7, 03 v E 00 o II �FCD w �r V/ W N Q U Q UN v N Z J Z W }+ O Z O_ 06 in N QNLU NW Q ir 2 cdofcn Lu � � D U o __ U Z f W � =3 LO N S Z cn �C3_�_ O LU ♦ ♦ U � ~ a� � � h E V w u N c CL -0 C - O N w W Lo LU ZO � <S ~ v Mrn~ N Lco ■ J Q �� v H� C �� ���C) U LU O Q O J O Z O aCi a� O) CO ��- vo�'o oo� PRO - 2: TABLE 1 - PERCOLATION TEST RESULTS Lot 14, Shield -O -Mesa DATE OF TEST: 8/15/01 Pitkin County, Colorado •r- 0 - 2 Topsoil, root zone, dark brown 2 - 6 Clay, sandy, silty, stiff, moist, grey/brown, fragments of Mancos 6 - 7 Very fractured Mancos shale, hard, moist, grey 7 - 8 Mancos shale bedrock, hard, moist, grey NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION 4 30 20 2.50 AVG. DEPTH TIME INTERVAL DEPTH DEPTH HOLE HOLE OF INTERVAL, CHANGE, PERC. START, END, pERC. NUMBER HOLE, (MINUTES) (INCHES) RATE (INCHES) (INCHES) RATE, (INCHES) (MPI) (MPI) 4 30 20 2.50 4.25 1.75 11 20 4.25 6.00 1.75 11 20 6.00 7.25 1.25 16 20 3.00 4.75 1.75 11 20 4.75 7.00 2.25 9 20 2.00 3.00 1.00 20 20 5 37 20 3.25 4.25 1.00 20 20 4.25 5.00 0.75 27 20 5.00 5.50 0.50 40 20 5.50 6.25 0.75 27 20 6.25 6.75 0.50 40 20 6.75 7.13 0.38 53 53 . . ........................... ........ .._.:.:.-::.:.:.-:_ JOB NO. 12475 'SAMUELSON PUMP CO. INC. P.O. BOX 297 GLENWOOD SPRINGS COLORADO 81602 Kelly Hayes Box 12255 Aspen, Co. 81 61 2 Atten; Kelly WATER SYSTEMS SALES, SERVICE & INSTALLATION 945-6309 January 17, 1994 On December 16, 1993 a well test was conducted on a new well on Sheild-O-Mesa. The following information was obtained; Well Depth ------------------500'-0" Casing size (top) ---------- 7"(steel) Standing water level --------- 431.9' Max drawdown @ 12 gpm-------- 432.2' Production is greater than ---12 gpm Hardness 22 grains/gal Iron 0 pH 7.5 This test was conducted with a 2 hp. submersible test pump. The drawdown would indicate a total production greater than the pumping rate of the test. If you have any questions please call me Raun Samuelson at 945-6309. Sincerely; Raun Samuelson MEMORANDUX TO: Suzanne Konchan, County Planning Director FROM: Mary Lackner, Planner RE: Hayes Minor 1041 Hazard Review DATE: June 17, 1992 Issue: The applicants, Linda and Kelly Hayes, have submitted a request for a 1041 Minor Hazard review to construct a new single family residence on a lot approximately one acre in size, zoned RS - 30 PUD. The property is a metes and bounds tract located in the Shield -O -Mesa area, in Section 14 and 15, Township 9 South, Range E6 West of the 6th PM. Access to the property is from the County Snowmass Creek Road to private roads Shield -O -Mesa and Rabbit Way. After reviewing the 1041 Hazard Maps, staff finds mapped 1041 Hazards as severe wildfire and mancos shale on the parcel and the proposed development is in the vicinity of a mule deer and elk migration corridor. Division of Wildlife Officer, Randy Cote was consulted on June 17, 1992 for comments, but submitted no written comments. To lessen potential impacts to wildlife the following conditions shall be placed on the property: 1. All dogs shall be leashed or kenneled. 2. Fences shall be limited to 42" in height or less, and four strand or less. 3. Vegetation shall be maintained outside of the building envelope. In a phone conversation with Fire Chief Ron Thiering of the Basalt and Rural Fire Protection District on June 26, 1992, Mr. Thiering stated that the applicant will need to provide a 2,000 gallon water storage tank for fire protection, roadways need to conform to County standards, the roof shall be constructed of a non- combustible material and it is recommended that the applicant install a residential sprinkler system. In a letter dated June 24, 1992, Kelly Rogers of the Colorado State Forest Service recommended that the following mitigation measures be placed on the parcel: o Removal of all vegetation within 10 feet of the structure. o Vegetation thinning and landscaping to a minimum of 30 feet around the structure with a minimum of 10 feet crown separation between clumps of oak/serviceberry. Remaining clumps should not have a crown diameter in excess of 10 feet. o Vegetation density should be reduced by thinning out to a distance of at least 100 feet and possibly more on the downhill side of the structure if the actual footprint is on the steeper ground of the parcel. The Sheriff's Office submitted comments in a memo dated June 25, 1992and has recommended conditions of approval regarding wildfire, access and water supply. These recommendations are consistent with the State Forest Service comments and are included as conditions of approval for this review. The applicant retained consulting geologist Nicholas Lampiris to address geologic conditions on the parcel. In Mr. Lampiris's October 5, 1991 report he makes the following recommendations for development of the parcel: o A site specific soils engineering study needs to be preformed to insure proper foundation design. o Design positive drainage to insure that water flows away from the foundation. o Landscaping should be incorporated into the western edge of the homesite to control some existing erosion problems. o House design should avoid the accumulation of radon gas. The Environmental Health Department submitted comments indicating that an engineered designed septic system may be necessary to meet County requirements. A soils percolation test should be done to obtain information as to the design of the wastewater disposal system. The Environmental Health Department raises concern that if the proposed shared els not adequate, the possibility of developing a new well may not be possible. The approval of this 1041 should be reevaluated if the shared well is not the water source for this house. The County Attorneys office is satisfied that this is a legally created lot, and that no merger has occurred. They have also determined that there is legal access to the parcel. If the applicant locates the addition within the proposed building envelope, development will be outside of known hazard areas. Findings: 1. The building envelope and driveway access are located in an area which will not directly effect elk or mule deer migration. 2. The building envelope is located in a wildfire hazard area. The applicant will need to abide by the Sheriff's Department and State Forest Service recommendations to minimize impacts of such hazard. 3. The County Attorney is satisfied that the lot is legally created and has not merged with any adjacent parcels. Recommendations Sections 5-400.3(b) and 5-400.5(b) of the Land Use Code provide that the Planning Director is authorized to approve a site plan and application for a Minor 1041 Hazard Review. Based on the findings, Planning staff recommends approval of the Hayes Minor 1041 Hazard Review and recommends that the Planning Director sign the site plan with the conditions of approval noted on the site plan. CONDITIONS OF APPROVAL: 1. The following conditions are for the mitigation of nearby wildlife habitat: a. All dogs shall be kenneled or leashed. b. Fences shall be limited to 42" in height or less, and four strand or less. C. Vegetation shall be maintained outside of the building envelope. 2. The following conditions are for compliance with Environmental Health Department regulations: a. A soils percolation test should be done to obtain information as to the design of the wastewater disposal system. b. Prior to submission of a building permit, the applicant shall have the proposed water source(s) evaluated by the Environmental Health Department to insure compliance with County regulation. If the water source is found to be unsatisfactory, this Minor 1041 Hazard Review is no longer valid. 3. The following ✓conditions are to mitigate potential wildfire hazards on the parcel: a. The areas around proposed structures should incorporate landscaping with wildfire defensible space considerations as follows: 1. Brush, debris and non -ornamental vegetation should be removed a minimum 10' perimeter around the structure(s). 2. Vegetation should be reduced where necessary to break up the vertical and horizontal continuity of the fuels a minimum of 30' perimeter around the structure built on flat ground. (for increased slopes ref. CSFS Safety Zone chart pg. 13 Wildfire Safety Guidelines For Rural Homeowners) 3. Crown spacing between clumps of brush or stand separation within the 30' perimeter should be a minimum of two times the height of the fuel. 4. Pruning all branches from trees and brush within the 30' perimeter to a height of 10' above the ground and removal of ladder fuels from around trees and brush. 5. Trim all branches which extend over the roof eaves and remove branches within 15' of the chimney. 6. Reduce the density of fuels within a 100' perimeter of the structure(s) where natural reduction has not already occurred. b. Any additional proposed buildings within the building envelopes should incorporate wildfire hazard mitigation measures. C. The applicant shall provide a 2,000 gallon water storage tank for fire protection purposes. d. All utility extensions shall be buried under existing or proposed roadways and driveways. e. Addressed shall be clearly marked and visible with minimum 2" letters. f. The access roads and driveways shall meet County Road and Driveway standards. g. 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