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HomeMy WebLinkAboutpitkin.eh.264916102001 (1999)Aspen/Pitkin 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 Z Permit # 99050 Parcel ID # 2649-161-0 Type of permit New( ) Repair( ) Addition to Ho Name of Owner Lawrence Clay & Constance Knuth Street Address 0358 Crystal Country Estates, Carbondale, Property legal description Lot 2, Block 1, Crystal River Size of lot 2.89+ acres Total square ota Water source private well # of bedrooms in house 4 # of offices, Caretaker unit no Total square footage # of bedrooms in caretaker unit # of Designed for what # rooms (list) 81623 states subdivision of t house 2842 jq ft ls'& similar sized r sin the caretaker unit _ ;s, lofts & similar sized Y t it inirmatiorl/ Designed by Dean Derosier, MWE Mailing Address 111 P AABC, Aspen O 816 1 Perc rate 11 Profile hole deptl I Depth Septic tank capacity 2000 gal \1 Abso ments in caretaker unit F r or bedrock 30+ ft adding 650 sq ft S Septic permit approvermpliance ith the engineer des' n and specifications dated July 16, 1999. Any changes must be appment and the desig engineer prior to them being made. Minimum horizontal diomponents of the system and physical features shall conform to the Pitkin County ISDS regulatio The a sting syste aaaea gal t k. 650 sq ft and 42 1 so additional 28 will need be lit approv by: 1000 gal tartwill be added in a series downstream of the existing 1000 E) necessa for the absorption field. Currently there are 14 infiltrators, Mhe syst Date: Plans a e fications o the pr4sed individual ewage disposal system have been reviewed and are considered satisfactory. rmission i hereby granted to the ner or the agent to perform the work indicated in accordance with the Pitkin County ISDS lation i effect at the time of is e. This permit becomes invalid 6 months from the date that the permit was issued unless syst co truction has commentled or an extension has been approved in writing by the Department. As -built drawings mu cluded with this permit before the final approval will be issued. Installer: lokl Final inspection approval Date: V � Q .spen / Pitkin Environmental Health Depa. ;nt Contact Log Sheet Name: L Iq Parcel ID#: Address: 3 L Date Person Spoken To Comments / Action to be Taken I Initials !Time .—,el _ in e — ! '3 XJ ,I A cit Pitkin Count Environmental Health October 12, 2001 To: Mr. Dean Derosier McLaughlin Water Engineers 11.1P AABC Aspen, CO 81611 RE: Clay & Knuth residence, Lot 2, Block 1, Crystal River Country Estates subdivision CC: Lawrence Clay & Constance Knuth Dear Mr. Derosier, This letter is to advise you that the Individual Sewage Disposal System (ISDS) permit for the above stated residence/property has expired and cannot be renewed. The permit applied for became invalid 6 months from the date that the permit was issued. Projects that are continuing to be constructed must submit a new application. This, application must be in compliance with the April 15, 2001 (revised) ISDS Regulations. If this project has been abandoned, please notify this office. Thank you, in advance for your help and co-operation in this matter. Sincerely, Madelyn B. Sigley Pitkin County Environmental Health G:/ISDS/exp'd permit ltr.doc 0405 Castle Creek Road, Suite 10 Aspen, Colorado 81611 (970) 920-5070 fax 920-5077 www.pitkingov.com Ai January 1�8, 2�0�0�0 To: ..�� .-. 107M ASPEN • PITKIN ENVIRONMENTAL HEALTH DEPARTMENT The Pitkin County Environmental Health Department had issued a permit to install an individual sewage disposal system (I505) for the above referenced property on --1111 1 Lo i ",E' . As stated on the permit, the permit expires within six (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. We have had no contact regarding this permit since either the issue date or last extension date: hence the permit is considered expired. Please contact this department either by phone or mail to let us know the intentions for this property. We should be notified whenever work on a system begins.(whether a system will be installed in full or in part and to be completed at a later date) so that we can do our inspection(s). The engineer who designed the system must also be contacted so that he/she can inspect the -installation. If there is no intention to install a system on this property, please contact us to let us know that. If there are still plans to install a system on this property, please contact us so that we can determine what must be done to issue a new permit. In some cases, it may just be that a new application and fee be submitted, in others the permit process may need to be started from scratch; still others will fall somewhere in-between. If there are plans to obtain a new ISD5 permit, please keep in mind the six- month period in which work must commence or the necessity to request an extension. Thank you for your time in getting back to us regarding this issue. We'd like to help avoid any delays in the event that there are plans to begin installation of the system this spring or summer. We also have to plan for the onslaught of new permits that we will soon be getting and must make room in our files for them ... hence the importance that we be contacted if there are no longer plans an installing a system. Sincerely, }A — mV Nancy MaLKenzie ntal Health Officer �— — Ci ��`/06 130 SOUTH GALENA STREET - ASPEN, COLORADO 81611-1975 • PHONE 970.920.5070 • FAX 970.920.5197 Printed on Recvded Paper Pitkin County Environme CC: e_0 ASPEN/PITV-IN ENVIRONMENTAL HEALTH DEPARTMENT APPLICATK =0R INDIVIDUAL SEWAGE DISPOF SYSTEM 130 S. Galena St., Aspen Colorado 8161 Phone 970-920-5070/Fax 970-920-5039 Name of OWNER G 4- G4QN Owner's Mailing Address 0C—py,5L-AiQFQA Business Phone: Home Phone: 4 Primary Contact Person (all communication regarding this permit will .. through this person) Name Company -VAdff Contact Mailing Address Business • - 4&2 Phone Fax - Parcel ID # (available from assessor's office at 920-5160 or at www.aspen.com/assessor/) 2 6 4 -�2 O - D Street address of property 0338 CP-Y,97� GOUNT9Y tA06 GA,9'PA't-Z:; •-C-0- crN "_ ry � Legal Description: Lot _�_ ,Block �_ ,Filing Subdivision COI.rt.91t E 5 Size of lot: 2. 59 (acres. Type of proposed structure: Size of bldg. envelope: Total square feet of house 'ZQ,} 2 # of bedrooms in house # of offices, lofts & similar sized rooms in house NA Caretaker Unit: Attached ( ) Detached ( ) Total area(sq. ft.) of caretaker unit r4 It of harlrnnmS in rnretnker unit # of offices, lofts and similar size rooms of caretaker unit Permit is for: New Home ( ) Repair due to failure ( ) Remodel/Addition (X) Emergency use ( ) Water: Private well ( ) Spring ( ) Stream ( ) Community/Public Water System ( ) If community system: Name of system Z3 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. Signature of applicant IZow2E—J Date JUL- ( )51,1170t° Received by j $ L _ Receipt # 3 Date - MWEMCLAUGHLIN WATER ENGINEERS, ltd. 111 P AABC ASPEN, COLORADO 81611 970-925-1920 970-925-1974 fax mweaspen@rof.net MEMORANDUM Date: June 22, 1999 To: Pitkin County Environmental Health, Steve Wagner From: Dean Derosier; McLAUGHLIN Water Engineers, Ltd. RE: Clay Residence - Septic System Design Notes The following are my design notes for the Clay Residence Septic System design.. The new system will add additional units to the old system now in place. Exact Size and location of the existing system are approximate. Existing 2 bedrooms, 1,000 Sq Ft, 1 - 1,000 gallon tank, 14 infiltrators in two trenches of 7 units each. 1996 pert rate 11 mpi - 4 - Bedrooms - Approx. 2,500 Square Feet of living area - 100 gallons per day per person - 11 minutes per inch perc rates - Perc Test by Bob Nelson 1996 - Ground water 30.0+\- feet from surface Flow = Q = 4 bed rooms x 2 peo/br x 100 gal/day/per x 1.75 = 1,400 gallons per day Tank sizing - 4 - Bed Rooms requires a minimum of 1,750 gallons of septic tanks; Q X 1.25. The existing 1,000 gallon tank condition is unknown, but is only 3 years old and assumed to be useable. If the existing tank is pumped and determined to be in good condition, it may be used in the new system. An additional 1,000 gallon tank is to be installed in series with the existing tank on the downstream side of the existing tank. (2,000 GALLONS TOTAL VOLUME) Area of Se tic field re fired = A A = (Q\5) x square roots of the perc rate (AVG) = 1,400/5 X SR(11) A 928 square feet = 60 Infiltrators Infiltrators 30% reduction = 650 SF infiltrators = 15.5 square feet = 42 infiltrators Existing system is 14 infiltrators in two trenches of 7 in each. Additional infiltrators needed are 42 - 14 = 28 additional infiltrators. System Design is a total of 42 units in a trench system 44 -feet long ( 6 rows or trenches, 7 units in each trench). Add two trenches on each side of the existing two trenches, 10 apart center to center. For even flow distribution, the splitter box will need to be replaced to allow 3 distribution lines out of the box. The three distribution lines will then be split into a set of two trenches each. All piping to be 4" SDR 35 PVC and bedded in a minimum of 2" under and 6" over of 3/4" screened rock. The area under the splitter box will be compacted to 95% Std. Proctor Bed. New 1,000 gallon tank will be installed in the general area of the existing tank. Tees will be installed on both the inffluent and effluent lines of the tank, set on the inside of the tank. Set top of line from tee within 1" 'of the roof of the tank end extend line downward 12" below center line of tee.- Fill tank with water prior to backfill to check for leaks and leave water in tank for placing the system in service. Septic tanks will be a two -chambered tanks. The new system will be installed in the approximately the same area as the existing system. Piping from the home to the tank and from the tank to the bed system will be 4" SDR 35 PVC laid at a minimum of 1%. Insulate lines with less than 5 -foot of cover or in uninsulated crawl spaces. Install the 42 unit bed system as shown on drawing Total System size is - 44" X 501. Bed system to be install to within 1" of level. Adjustments to fit site contours and conditions may be made per approval of the engineer. Elevations of the tank and trenches shall be finalized in the field by the engineer. Installation and operation shall be approved by the engi`b!' to final acceptance. System must meet all PCEH and MWE s tz .,;cS e a D. �7Fmu t; Dean D & E. X* V. w Jun -15-99 09 - 42A steve Wagner c f.,:' :E:h c .�,;.�; .£ice• `' ASPENIPrMN ENWRONMEN kf FJI�TH DEf'AR7M NT APPLrAitON FOR INDMOUAIL 8EWAGU DOPOSAL ^ D Iso s. Gwm Sl_, Aso" Cdera stat (` J� penttit s O d 3 Parol iu sI,-/(, ppm* For: N.w lnatatlsll(m t ) f� o O F""'°ei1`�' �+ ( ) Name of ov*wR - Owrnfs MWM Addnaa t/alrle of A900 /lpont's meov Address COPY of POM* to of Mont W. owner Nf Apt (-/) Both V Slovet s 6 AL _,.�..:...:.._ Clt L_..,Rty� W 1R �. of let ^-�.wsa �o•dpaaa•a shoo al tsar_ wwolow 2�LQ..-- -- Total anam*v spew (sq• it): i= LL` " �, oo d d Badroons. afllaa d at+riar ads aeons: i lAnortrA l IDeiadNd 4 of wawtPlNlttg ww M" ( )strosra t ) ConsntalitldPt tPisnla of 8p'"'1� is Prod of Adoqura Wader Medved 7 ( ) YM t 1 NO fw va Fro od bw *wmved My P1lt1n Govt 7 (*79 Yes ( ) Ns � _� . r...`....r ► M Yas ( IN* la ■ow or the fww oull"-- . adrew/ses Saida Msra Mral�an Y Wle an0lirY pin YMrnrtl'ab v AM�ypn /rr M Y1aliAtrrt a""" or � don pueo �s�i�e! � M aM��MM/rKY 1� �b N emits s vwYrri��l� � kwddW May Wall a1IIiP M�_�, l e.�worY�s1 gtrw�s.srirs w� a MJ" No usurnow ayww� 8fpnwsw d mppkwd �h� ft as a 7 O tlrarra A°'aosrn arse: eOPIC UK* rapackr- Sco tt � An inspeotlon is r+auinmi vrter 10 bests 'W any e0""Perwvt of ow 6MIblAfoa copra At ON* and evaeJie+tlens d >M engtnsar out b• torsrred. Any donf)es � be �O1"b p Design try EnoMar f � 7 y vow Mwliation !a 1M Emkars�M� t Inwaft o wftlrlo turd tt+a «ror�•« � r _ Osb rl,..wv�rawe.rers w�a.er.pid w- t�t M�pe�1t�ee r"'n's'Irea e�� °"'�'m�a eee �w.�orp a en aerww N.e Mee awraea w.Ahf ar w oesa�� tnsuftrw �y A: draillrt114e rIMMI tea t11eiY fi Mltif 1 so pwo ftk tow Daft 1 3S Dew M*-Mlad' F" UNPOCrOn APP4* M/ornrallert aonstaMl�Y, o. ' 7 1921,1 ROO*4w Oats Pd.: _ evh^� 7- lfv -d i ; CA v Nelson Enuiron»:entaz & Wastewater Soludo!m UA E W S December 1, 1995 Mr. Doug Boyles c/o Braeburn Builders, Ltd. P. 0. Box 1247 Carbondale, Colorado 81623 00, D E C X 71995 EN lKONMENTAL HEALTH ASPEN / PITKEN 14E. . The Casebeer Residence located on Lot 2, Block 1, Crystal River Country Estates Subdivision, 0358 Crystal Lane, Pitkin County, Colorado, _ _., �2...�WLl.li�4.-hear 1�V��.^.•�L•m,..: s.:u.Js�.l�.�ar.:.,._._1.::Y:;;..ito�..r.�.w�u..s+�a�d+NS::;.�.f. iLSi:isa�.,.,ct..isi.�a.�...a.�....:+i:..'ai...�.1...6�iM>5tw�.:[ti �.,t.ssc .].. sJ.+v.... ..._ ._. _.. .. . 7 This company has conducted an inspection of the referenced property for the purpose of evaluating the on-site wastewater disposal system serving the existing dwelling. It was apparent that some septic tank effluent was surfacing over the old seepage pit, particularly when laundry was done. As a result of this condition and as requested, Nelson Environmental and Wastewater Solutions, Ltd., performed a soils study and percolation tests for a replacement septic system for the house. We conducted this study in accordance with Article 5 of the Pitkin County Individual Sewage Disposal &stem Reculation.We have based our recommendations on the subsurface conditions encountered. We will furnish this letter to the Aspen/Pitkin Environmental Health Department at our earliest convenience in order for you to obtain a permit to construct this individual sewage system. Existing Construction and Building Site: The house was originally constructed in the late 1960'.4. The residence is on a tract of abproximately 2.6 acres. , . The existing residence is a house with two bedrooms and 1two and one-half bathrooms and Q� approximately 1000 square feet of finished living area. The house site is located in a meadowwith a gently rolling topography, sloping at less than iv m ical of this ost of me property. area, the vegetation pattern of a 15% grade toward the Crystal sagebrush and native grasses covered Water to the residence is supplied from a w+eil drilled on the East side of the house'. The well is located a sufficient distance from obvious sources of contamination, such as the proposed septic system location. Existing On-site Wastewater Dispersal_ System We were not able to locate a permit for the septic system by reviewing the Pitkin County Environmental Health Department records. The size and construction of the septic system P.O.Box b96lSnowmaellL0�OZ6i O�-�Xyd 5 Offi�H�� I�ZId/I�- 3280 �dSye(303) NIN Z�titi766 Q M 66-91-1�flf I IDyd k1l ^. 10� Casebeer Septic System Investigation and Percolation Tests 0358 Crystal Lane December 1, 1995 Page 2 is unknown, although it is obvious from pumping records and the owners recollection that the existing septic tank is minimum 750 gallons in volume and that the absorption area consisted of a seepage pit Subsurface Conditions: A soil profile, 10 feet West of the proposed absorption area and just downhill, was excavated to a depth of ten feet. - The excavation revealed that there -was no groundwater - apparent or bedrock present within ten feet below the surface of the ground. The soils consisted of about 10 to 12 inches of dark organic clay loam topsoil. The subsoil was a red, loamy sand\of uniform consistency. The subsurface soil conditions were evaluated with the standard percolation test procedures at the approximate location shown on Figure 1. The test holes were excavated at the bottom of shallow, four -foot backhoe pits by hand. Before the test, the sidewalls were scrapped, however no gravel was placed in the test holes to prevent scouring when water was added. Percolation Testina: Percolation testing was performed in the proposed holeson trench area West Of the excavated to a total depth of residence. This testing was performed in threeshallow between fifty four and sixty inches. An initial filling of the percolation test holes was done by adding approximately 10 gallons of water to each hole the aftemoon of the day before the percolation test was conducted. The percolation holes were then further pre-soaked by adding water to refill the test holes to a depth of fourteen inches twice fof the eight hour perm before beginning the percolation test. The results of the percolation testing are presented in Table I. These results indicate the loamy sands have an average percolation rate of 11 minutes per inch, a satisfactory percolation rate under Pitkin County criteria. Minimum Pitkin County Requirements: The percolation rates of the soils were measured at an average of 11 minutes per inch. The minimum Pitkin County requirements for this septic system installation, are based on an estimated average daily sewage flow to the absorption area of 300 gallons per day for I HDVd CLOS ON OL6: XVd HiWaH ANH N111Id/NaM Kv SS ; i l QOM 66-9 ti-Nnf 0 �-N Casebeer Septic System Investigation and Percolation Tests 0358 Crystal lane December 1, 1995 Page 3 111110 /* the residence. This flow would require a septic tank of 750 or 1000 gallons in volume, and a minimum of 350 square feet of standard, gravel seepage area for the two bedroom house, We recommend that you retain the existing septic tank and add another two -chamber 1000 - gallon concrete tank, in series, at the location of the existing seepage pit. You have indicated a preference for the use of the "Infiltrator'"" graveless leaching chamber absorption trench for the replacement absorption system on this property. The use of -- -� "InflltratorTm" leaching chamberscurrentlyallows a 30% reduction in absorption area under County regulations. This reduction is based on manufacturer's claims and on an approval of such a reduction by the Colorado Department of Health, Water Quality Control Division. Therefore, the suggested septic system absorption area layout incorporates the alternative listed above. Based upon the percolation rate, minimum County requirements, and the reduction mentioned, a total of 248 square feet of trench bottom area is necessary. We recommend that the septic system consist of two terraced trenches, each 44 feet long and containing seven leaching chamber sections. The completed installation will require a total of 14 sections of leaching chamber. It is advisable to equalize the flow to the two trenches with a distribution box, placed between the septic tank and the trench excavation. Limitations: This report has been prepared according to generally accepted practices in this area for use for sewage disposal design purposes. The conclusions and recommendations submitted in this report are based upon data obtained from our site visits at the location indicated. There is some possibility that the nature and extent of variations in the subsurface soils across the site may not have been evident at the time of this investigation, and may need additional evaluation, if further excavation reveals conditions different from those described This office should be advised -of any unusual situations as soon as possible so that we may reevaluate our recommendations. We hope that this investigation is sufficient for you. If you have any further questions regarding this letter or if we may provide additional assistance, please call. Sinoerely, Robert F. Nelson, R.E.H.S. President , ti HOV6 Reviewed By. MS Ol6 OG6:XVA Gordon, Meyer NIUId 66 -91 -Of Nelson Envlronmenw & Wastewater SOLM9 ns, RA E TABLE I W S URCOI.ATION TEST RESULT MUM Hole Length Depth at Depth at Drop in Average Hole Depth of Interval Start of Interval End of Interval Water Level Percolation No. (in.) (Minutes) (inches) (Inches) (Inches) RatWn,Anch) I 56 6 39/16 23/4 13116 6 23/4 23116 9/16 6 _ -2 3/16-.._. 1 1/2 11/16 (rem) 6 41/8 31/2 5/8 6 31/2 213/16 11/16 9 2 54 6 67/16 57/8 9/16 6 5718 57/16 7/16 6 57/16 5 7/16 6 5 49/16 7/16 6 49/16 41/16 1/2 12 3 60 6 43/4 41/8 6� 41/8 3 11/16 7/16 6 311/16 3118 9/16 6 3 1/8 25/8 1/2 6 2 5/8 21/16 9/16 I I .. .. a. ,.y... ....n ..:. .f..a. :.. .ter'..• — .. .. .. .. .. ' r .. .. ' Carolyn Casebeer Residence 0358 Crystal Lane Lot, 2, Block 1, Crystal River Country Estates Date of Percolation Test: 11/28/95 P.Q. Box 6861 SnowmassVillage, o. 5 �NX,3289 �de(3) 7 66 1 HVd MS OU aM IiZH IN3 1 d/MX �d90ZtiQ M 66-9 �-Nlr !r. ,Nelson Environmoud & wastewater Solu9ltd: E President Schmeuser, Gordon, Meyer Enginger5 W Property Address: 4358 Crystal Lane S Legal Description: l,ot 2 Block 1 Clystal River Country Estates Subdivision Property Owner: Name Mrs. Carolyn Casebeer Address 0366 Crystal Circle_- Carbondale, CO 81623 Phone (970) 963,2174 Contractor: Excavating Contractor. Name Not Applicable Name Braeburn Builders. Ltd Address - _ Address: P. 0, Box 1247 Carbondale CO 81623 Phone Phone 963-0074 Saturation and Swelling o Smeared surfaces removed X Yes o . Gravel Added Yes 7t No o Date and Time presoak water added 11/27/95 0_, 4.20 pm, and 11/28/95 (i0 9;45 a.m. o Amount of presoak water added 55 gallons per test hole o Water remaining in holes after overnight presoak? Hole 1: Yes _& No Hoke 2: —Yes JL -No Hole 3 Yes X No Pircolaion trate Measurement Hole 1: 9 minutes/inch We 2 12 minutes/inch Hole 3 11 minutes/inch AVERAGE 11 minutes/inch Groundwater: o Not Encountered at 10 R o 'Estimated depth to high seasonal water if not encountered *30 feet o Is area believed to be sul*ct to seasonal ituctuations which could result in a seasonal water table? _ Yes X No Slope in absorptkm area 14% to the SW Bedrock o Not Ettooumrered o Estimated depth it not encountered -80 feet o Type of bedrock: ,XSandstonoClaystone Siltston '_ outer X Fractured Weathered o is bedrock believed to be permeable? X Yes No I certify that the above information is correct and complete to the best of my knowledge and that all tests were performed in accordance with the provisions of Pitkin County Individual Sewa a Dis osai tem Re ulation Section 5-1 through 5-7. Reviewed by: Robert F. Nelson YS;ch mmond, P.E. President Buser, Gordon, Meyer .Lz''4-a F.O. Box 6961 Snowmass ViUag6 COO. 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CIRAVs- 4- GRAVM /0 c,R.ov� EXISTING LINE TO TANK LOCATION IS APPROX IM TE NEW 1,000 GALLON SEPTIC TANK IN SER IES WITH EX IST INGc 1,000 GALLON TANK, IE OF INLET AT \ NEW TANK 0.25' BELOW OUTLET F EX IST ING TANK, LOCATE NEW TANK 5' DOWNH ILL OF EX IST IN TANK, (2,000 GALLON& TOT IN TANKS) REPL E ISTINCx SPLITTER BOX W 11TH EW IT, 1 INLET LINE AN 3 LET PIPES, 1 TO EACH SE OF 0 INFILTRATOR TRENCHES 0 O PROFILE HOLE 4 PERCOLATION HOLES a 3A,CLAY ,: CLAY RESIDENCE\WAGNER SEPTIC SYSTEM SITE PLAN AND DETAILS PROJECT NUMBER 99-028.02 McLaughlin Water Engineers, Ltd. 2420 Alcott Street DenverCo. 80211 DESIGN: GDD CHECK: GOD DATE: 7/99 err NUMBER SS SS