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Home My WebLink About1.04 Water reportri Water Report for: Mahan Subdivision Black Diamond Mine Road, GARFIELD COUNTY, CO Prepared for: James & Roberta Mahan 0648 County Road 126 Glenwood Springs, CO 81601 Prepared by: oMOl1NTPlIN CROSS ENGINEERING, INC. Date: May, 2005 Civil and Environmental Consulting and Design 826 Grand Avenue Glenwood Springs, CO1fi01 Civil and Environmental Consulting and Design 1/2 Avenue Glenwood Springs, CO 81601 ph 970.9455544 fx 970.945.5558 www.mountaincross.eng.corn MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826'1// Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.Inountaincross-eng.cont 1 Water Report Water Plan Supporting Information TABLE OF CONTENTS Page 1-4 Figure 1 Appendix Water Report Mahan Subdivision May, 2005 Purpose and Scope of Report It is the purpose of this report to evaluate the existing water system of the Mahan property; and from the data and evidence gathered, make a determination as to whether or not the system is adequate to supply water to the proposed subdivision. This report will provide a project overview, a description of the existing water system, a summary of the legal supply, an estimation of the anticipated water use, an analysis of the components of the system, a brief mention of the fire protection, and conclusions. Project Overview The Mahan Subdivision project is located to the south of the City of Glenwood Springs, in Garfield County, Colorado. It is located at 0648 Black Diamond Mine Road (County Road 126) off of Four Mile Road. The project is at an approximate elevation of 6,800 feet, is at approximately latitude N 39°27'20", longitude W 107°19'55", and is in Section 9, of Township 7 South, Range 89 West, in the 6th Principal Meridian. It is a project involving an area of approximately 20.8 acres. The proposed project will divided the property into 2 lots. Lot 1 will contain approximately 5.7 acres on the northeastern portion of the project. Lot 2 will contain approximately 15.1 acres and the remainder of the project. Black Diamond Mine Road creates a natural division between the two proposed lots and each lot currently contains an existing residence with assorted out buildings. No new construction is proposed. Existing System The existing system source is the Davies Well, decreed by the Division 5 Water Court in case no. W-2572. The well is an artesian source, from which a pipe conveys water to a gravel infiltration gallery with a screened inlet. From the inlet a 1" PVC pipe conveys water by gravity to two 5,000 gallon storage tanks for a total of 10,000 gallons of storage. Water is piped to each lot where individual booster pumps and pressure tanks deliver the water. In addition to the gravel and screen at the gallery, the water passes through a canister filter cartridge containing a spun fiber filter serving as the treatment for the existing water system. An on -stream pond, separate from the water system (except that the overflow from the storage tanks daylights there), provides storage for fire protection. Legal Supply The well is permitted under number 239415 issued on April 05, 2002. This well is also known as the Davies Well and was decreed by the Division 5 Water Court in case no. W-2572. The well is permitted for 15 gpm of production. The well was put to beneficial use on December 31, 1941 with historic uses congruent with the proposed subdivision. A West Divide Water MOUNTAIN CROSS ENGINEERING, INC. Civil•and Environmental Consulting and Design 826 '/2 Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970.945.5558 www.rnountaincross-eng.com Water Report Mahan Subdivision May, 2005 Conservancy District was obtained for augmentation of any out of priority use that may occur in critically dry periods. The existing well decreed along with the West Divide contract for augmentation apparently addressees the legal supply of water. This is more technically a legal issue and legal counsel should be relied upon to verify that this is the case. Estimated Water Requirements The anticipated demands on the system are for the two lots of the Mahan Subdivision. The average in house use is estimated to be 100 gallons per day per person with a household average of 3.5 people per household. The peak in house use is estimated to be triple the average day. The landscaped area for the Mahan Subdivision is estimated as 10,000 square feet of irrigated area per lot. The maximum irrigated use is estimated to be 0.25" per day. • Average In -House Use = (2 lots) * (3.5 people/lot) * (100 gal/person per day) = 700 gal per day (gpd) • Peak In -House Use = 3 * Average day = 3*700 = 2,100 gpd • Peak Outdoor Use = (2 lots * 10,000 sq ftllot) * (0.25"/day) * (1 ft/12") * (7.48 gal/cu ft) = 3,117 gpd • Total Peak day Use = (2,100 gpd + 3,117 gpd) / 1440 minlday =163 gpm The Peak Day Use to be used for the subdivision is 3.63 gpm. Analysis Source -Quantity Since the source is an artesian well, a spring, it can not be tested as a typical well with pump tests showing drawdown and recharge. In lieu of this, J&M Pump, Inc. of Glenwood Springs conducted a spring flow test. The results showed a flow equivalent to 15 gpm. In their letter dated January 22, 2005 they stated that the water supply and storage is adequate for three single family dwellings using 350 gpd each. The peak day Use to be used for the subdivision is 3.63 gpm. This is about 25% of the decreed amount. The spring and decree have a capacity of four times the anticipated use. Treatment -Quality The existing water treatment consists of filtration with cartridges containing a spun fiber filter. The apparent opening size was undetermined but estimated to be 5 micron or 10 micron. Water bacteriology tests performed on June 12, 2000 results were absent of the presence. However protozoan cysts can be smaller than one micron. Bacteria can be even smaller. It is recommended that the treatment of the water system be upgraded. A one micron filter should be installed downstream and in series with the existing filters. It is also recommended that UV disinfection be incorporated for treatment smaller than one micron. MOUNTAIN.CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design • 826'/ Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970,945.5558 www.mountaincross-eng.com 2 Water Report Mahan Subdivision May, 2005 Distribution System - Dependability The existing water distribution piping for the Mahan Subdivision was evaluated against anticipated flow conditions. Pipe capacity and velocities were calculated to verify that the anticipated flowrates are congruent with the existing. The peak hour flowrate was used to estimate the flows through the pipes for both indoor and outdoor use. The peak hour rate is estimated as twice the peak day rate: • Peak Hour Indoor = (2 lots) * (3.5 people/lot) * (100 gal/person per day) * (3 Average day/Peak Day) * (2 Peak Day/Peak Hour) / 1440 - 2.92 gpm • Peak Hour Outdoor = (2 lots * 10,000 sq ft/lot) * (0.25"/day) * (1 ft/12") * (7.48 gallcu ft) * 2 / 1440 = 4.33 gpm • Peak Hour = 2.92 gpm + 4.33 gpm = 7.25 gpm The existing line is a one inch PVC water main. Velocities calculated for a flowrate of 7.25 gpm is approximately three feet per second. This is well within the range of acceptable velocities. The capacity of the existing line is adequate for the calculated flows. Storage - Dependability The existing 10,000 gallon water storage system is in two buried, 5,000 gallon tanks. The existing storage volume was evaluated against calculated volumes. Recommended storage for indoor use is equivalent to the average day flows, or 700 gallons. Recommended storage for outdoor use is also equivalent to the average day, half of the Peak Day, or I,559 gallons (3,117 gal. /2): • In House Average day = 700 gallons • Outdoor Average day = 1,559 gallons • Recommended Storage = 2,260 gallons < 10,000 gallons actual storage The existing storage exceeds the recommended and is adequate for the calculated flows. Often water storage is provided higher than the location of intended use to take advantage of gravity to pressurize the system. The existing water tank elevations are not high enough to adequately provide optimum pressures to the lots. To compensate for this, booster pumps with pressure tanks supply additional pressure to the lots. Fire Flow Requirements Water for fire protection is available in the existing on -stream pond, separate from the water system. Evaluation of the adequacy of the storage was determined to be out of the scope of this report. A Fire protection plan was anticipated to be obtained by the Owners and to be addressed with correspondence from the Glenwood Springs Rural Fire District. MOUNTAIN CROSS.ENGINEERING, INC.. Civil and En'vironmentai'Consulting and Design 826 'h Grand Avenue,,Glenwood"Springs, CO $1601 P: 970.945.5544 E. 970.945.5558 www.mountaincross-eng.com 3 Water Report Mahan Subdivision May, 2005 Conclusion The existing well decreed along with the West Divide contract for augmentation apparently addressees the legal supply of water; the existing water source capacity is greater than the anticipated use; the existing storage is larger than recommended; and the existing distribution system is adequate to handle the anticipated flows. Although the system has been used for drinking water historically, with no known related illnesses, modifications to the existing treatment system are recommended: 1. Installation of a 1 micron filter on the downstream side of the existing canister filters, and 2. Installation of a UV disinfection system downstream of the 1 micron. These would generally be the easiest to install, operate, and maintain. They are likely the least expensive as well. Based on the information provided, gathered, and evaluated during this report, along with the incorporation of the recommendation described above, it is our opinion that the existing water system is sufficient to supply an adequate supply of water for the proposed subdivision. Thank you for the opportunity to provide this report. Feel free to call if you have any questions, concerns, or comments. Sincerely, Mount • in Cross Engirjeering, Inc. is Hale, PE MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826 % Grand Avenue, Glenwood Springs, CO 81601 P: 970.945.5544 F: 970945.5558 www.rnountaincross-eng.com (C z 0 FU ,L18.70' I R=88.06' A 77613'45"/` C LEN=109.92' \BRNjfi`58'59"w 0, 4j>ATS�MN Pgct L T 1 AC LS / / L=124.41 R=989.34' A=07'12'18" C LEN -124.33' BRG= N 38'04'27" / 24' ROAD EASEMENT BOOK 483 AT PAGE 421 SHED ❑ FRAMED DUGOUT STORAGE BUILDING CENTERLINE 10' UTILITY EASEMENT BOOK 483 AT PAGE 421 CABIN WATER STORAGE SHED L / L=107.93' R=122.27' \A= 50'34'39" C.G 1:30 B E 2 RG- 4'099''29" i / POND FOR FIRE PROTECTION WATER /LINE (TYP) 2 — 5,000 GALLON / STORAGE TANKS R=109.69 A=41'33'1 C LEN -77 82'1 BRG=N83 7',4"W D POWER 5,06 ACRES +/ PROPOSED 201 YN PVC PIPE MAINTEINANCE EASEMENT SPRING .' .. // // // // X INFILTRATION GALLERY AND SCREENED INLET DAVIES WELL: 15 GPM 1'■ 100' O 101116101 Chris HL OW IRS xm 501-001 FIGURE 1 Water Plan Mahan Subdivision MOUNTAIN CROSS ENGINEERING, INC. Civil and Environmental Consulting and Design 826112 Grand Avenue Glenwood Springs, CO 81601 ph 970.945.5544 fx 970.945.5558 www.mountaincrass-ng.com Appendix Supporting information Form No. OFFICE OF THE STATE ENGINEER GWS.25 COLORADO DIVISION OF WATER RESOURCES OWNER( 818 Centennial BkiQ„ 1313 Sherman St.. Denver, Colorado 80203 @03) 888-3581 APPLICANT WELL PERMIT NUMBER 239415 _ - DIV. 5 WD38 DES_ BASIN MO JAMES P MAHAN JR 0648 COUNTY ROAD 126 GLENWOOD SPRINGS, CO 81601- (970) 945-0319 ,PERMIT TO CONSTRUCT A WELL APPROVED WELL LQCAi:LQ GARFIELD COUNTY SW 1/4 NE 114 Section 9 Township 7 S Range 89 W Sixth P.M. SIS�A_NCES FROM SECTION LINES 3115 Ft. from South Section Line 2873 Ft. from West Section Line LAV COORDINATES Northing: Lasting: ISSUANCE OF THIS PERMIT DOES NOT CONFER A WATER RIGHT GOND TIONS OF APPJ QUAL 1) This well shall be used in such a way as to cause no material injury to existing water rights. The issuance of this permit does not assure the applicant that no injury will occur to another vested water right or preclude another owner of a vested water right from seeking relief in a civil court action. 2) The construction of this well shall be in compliance with the Water Well Construction Rules 2 CCR 402-2, unless approval of a variance has been granted by the State Board of Examiners of Water Welt Construction and Pump Installation Contractors in accordance with Rule 18. 14 The well shall be constructed and maintained in accordance with variance no. 2902-22A, REVISED 2002-220, granted by the Board of Examiners of Water Well Construction and Pump Installation Contractors on March 25, 2002. 4) his well is recorded and permit approved in accordance with CRS 37-92-602(5) for historic use es indicated herein and described in CRS 37-92-602(1)(b), being a well producing 15 GPM and used for ordinary household purposes Inside 2 (two) single family dwelling(s), fire protection, the watering of domestic animals and poultry, and the irrigation of not more than 1 (one) acre cif home gardens and lawns. Additionally this well is located on a residential site of 20 acre(s) described as the W 1!2 of the SW 114 of the NE 1/4, Sec. 9, Twp. 7 South, Rng. 89 West, 8th P.M., Garfield County. Further identified as 0648 County Road 126, Glenwood Springs, CO 81601. This wall is Identified as the Davies Well decreed by the Division 5 Water Court in case no. W-2572. 5) Water from the well was first used beneficially for the above described purpose on December 31, 1941. NOTICE: This permit has been approved for the location and historic use as noted above. You are hereby notified that you have the right to appeal the issuance of this permit, by filing a written request with this office within sixty (60) days of the date of issuance, pursuant to the State Administrative Procedures Act. (See Section 24-4-104 through 106, C.R.S.) x2 tre.1/ gyp APPROVED BMW State Engineer By rfe s Noo, 9500977 �„� _ DATI` APR V -_ JCPIRATION DATE #� rt FRoh9 J&P1 PUMP COMPANY Y FAX NO. : 970 945 5:59 Feb. 01 2005 07:57AM P1 s, Amp gfil?&utastAsa 717 graiwood. *age eet mei 97C_m41 9 &ft 97c► 97C -945-57S9 Well Test DATE: January 22, 2005 TO: Jim Mahan 0648 Co Rd 126 Glenwood Springs, Co $1601 RE; Spring Water Test Attn: Jim, A four hour spring flew teat was performed on your domestic water supply. The tbllowing results were obtained: Water Flow IS GPM Storage: 10.000 Gallons (2) 5000 Gal Storage Tanks Clarity: Clear This water supply and storage is adequate for thee single family dwellings with a usage of 350 gallons per day per household. If you have any questions, please call Pia, 945-6159. Thank You. 11;7"-/7LA441 Richard A !Holub Lie. No. 1196 . _. - _ ..cti - — . - P.y3 Ju l200003►i38 4.,07.-?: aOLLEvr.iJ Q'J.v�. +� c) UAV TEhlO `OG SAMPC'E . L__ .,✓).x.a e .r ‘X.,-.11.1' a,:x r I 1 P POi,r,ke 0 Mar C .5Pa:.cQ ti= von 14 of r Pw3rD r.-1 AN. 50',20 i � 1 _i_C SC-CC-A:-cLaV7sE PiAm_ SLS ff C r?r a jRs55 CTf Ov ECT o. /12Z1.171.1... ry 1.171.11.171.1... 0--11 ■Y MCvL AzC'cc/ O J L_. 0 a. :MLDR:N. pfeLD RESULTS: SEERE:EAS cr.,.4 COI:,-! + r i �—r TOPL C�;lFCRL7 :'FE51f' :/y .izc'NT 0 R CE REO 8Y .E:,w;Li may r:CT 6E rESTED IC ALL;,tiFOPts1.4Or. 13 p r rry o[ 117° - 63.I5 FF_: gY..A.V 1A3 ID5 ;07/9T. .mac; -.555 (12,�1r �r!bol Yfi�T ag.CGAaLG kq� �FS.1FpRlJJl,j('.!L w-=;rP • ru DENvEA ;cr. 'Ear CP.CE+''EC tItse-4C' D"xEZ STATE OF COLORADO Colorado Department oL Pticric H a•h and Env;rcroenr C P. & Grard,Jurct!o Bracch L J r� ox I CCO+C l�gnd Ju:1cigcn, 00 8 t, .) z RUP)5 81831 AtnCY$T 7'J -Jf' / \ • �r7 ! ▪ :*1--') /? ca 86-20-99 11:19 TO: THE. PRINT ;;ORi{S FRCM . vroS-.._ rl n Pel Roberta K Mahan 0648 CR U6 Glenwood Springs, CO 81801 H ago Dor Tel Res eerch, Inc. Street Co 40403 USA i 279.4501 3) 278-1528 REPORT OF ANALYSIS DA HR! JECT HRt FRIES NO. DA RECO DEIN P.O./ November 17 2004 002•JK4 J202/04 10/13/2004 Nona Recd SAMPLE NO. J202/04-1 SAMPLE IDENTIFICATION; Otto Sample - cot}ected on 10/11/2004 ia 1700 by Surer Mahan PARAMETER Cross Alpha (+-Precision•), pGI/I Gross Alpha (4.-Preciaian"), pC1/I ( Rechurn-226 (+-Precisian`). PGI/1 Radium-228 (+.p'.dsian"). p011( Uranium, pCI/1 (T)" Uranium. ug/( ('1') 'Variability of the radioactive dada Cnrtrfica ori IC's• CO/EPA - 0000 NY 1r4AP - 11417, PA DEP 68661 "Uranium leaults reported assurni ...Lass Radon and Uranium CODES - (T : Total (0) z Dissoivri (S) • Suspended (R) s Tota (PLS) oatantially Dissolved s Less than RESULT DETECTION LIMIT METHOO 6.1(4.1.7) 1.3 4.5(+-1.7) 1 3 0.1 0 0(+-0 5) 0 5 2.2 0.5 33 07 fl EPA 900,0 EPA >.0 SM 7500-R4 8 EPA Rs -05 ASTM 02947-91 ASTM D29 7.91 COMM (onuntinp error) at the 95% confitlence level, 1196 ¢rgrna 8; CT - PH -0152: KY - 90076. KS - E-10265' NH • 232144-A; VI - 99837$610 the activity of natural IJ = 6 77 x 10.7 Cr/gm. acoverable Page of 1 By' Robarl ' algid Labca'atManager ANALYSIS BATF_ ANALYST 10/27/2004 ,IMG a 0642 10/27/2004 ..LMC; IS 0822 10/28/2004 JMC a 1214 11/09/2004 JS 1134 10/1512004 LH a 2325 1006/2004 LH g 2325 An Etnployee-Owned Cornparry — MEM HA2EN RESEARCH, INC. 1-1"ZEN 4601 wvtANA R E ET MEI GOLDEN co Phone - (303) 241 4501 Fax - (303) 278 1528 C 'LAIN OF CUSTODY RECORD Mani Customer informationBir llInQ'Mormition (tf erent) Client Name' Roberta Mahan II Nems J Contact. isfllirep Co►'1ta•ct: 0646 CR 126 Blilin. atom"_ Glenwood Syne a4 Cd 61601 Phone: 970 818 5738 F P011: -__ Pro at ir. a{a) (Print) ... San -leers Mrt+r aK vita (go 1Si• Curs) L / f I j Sample Identification Sample Date and Time G0 A -es Re wired /0/1//if°Mdd X a .>>:s AJ.ha Ra 228, Pa 228. U ' MIZE D4' Y MIS 111111111111111111111111111111 !PIIIITiiiiimmilia IIIIIIIIIIIIIIIIIIIIMIIIII (1) p (4),(n+ckp w*e•, WW=WaslSWatrr =9unaci Warr 60•$0ii GWGround Wa sr SLI.Studpr (2( PrP1n9t G,.,Giaes O=Other 1 (3) N' Nrsric ,1/441 U=Unptsswrwd C=Qoo+e* SaSuiluvr. Acrtl B.Sodrum FIyrWb. T$odAnn Thigi JIale HIZI Z=Z1 rdoua Od(liher Acetate O.Ottla• Rellirtquishsd by ! • Datei Time Eo /i ,'jb, RIOsivsd by Dein Time / Date/ Time / 14beivsd by +- Received by ' Dais/ Time / DAN/ Time / ISNnq iahed by } Cate Time Shipped by r Data/ Time-3/411or /• Lab . 1 ,fit • , •I .Qa 1� 1 f Tinto D- j iiiiiii Rsqusatad Turnaround Time Standen Fluah Must . • • roved, apditIonsl a . • es ;,;o l.ab Allis ontyt+ shipped on : 09/30/1, shipping charge : $10,044 to` 0648 CR 125 • oidify the sample with Glenwood Springs, CO 81601 h C acid upon receipt at Hazen. I'D' Asa.). 91226 Ra{/5 y+H 11111111 HAZEN RESE • 4601 INDIANA F EN GOLDEN, CO /NMPhone - (303) 2 # CH, INC, CAIN MET 1 • 13 i t 4501 Fax - (303) 2781528 OF CUSTODY RECORD Customer Information 1 Rillin. Information If • Efferent Client Name: Roberta Mahan 1 $1111 • Name: Contact: 1 31111 . Contact: Atl et& 0648 CR 126 I Glenwood • ri I", CO 81601 1 Phone: 970 618 5736 :I PO #: Project #: Sampler's Narne(a) (Print) 11111146 ` &dlID (Signature) — falt ggj / i i Sam .le Identification Sample Date andlTime - a N ` r? a A :1 ses ..uired R 11 to al /40cJ X Ill 4 P II G • ss Al . ha, Ra 226, Ra 228, U ....1.1 Allikillillillill Ir i°r',�/ ° 1111111 11111111.111111111111.1 1i1r 11.1111111011111111111111111111111111111111 1111111111110.101.11111111111111.111111111111� (1 OW=Drinking Wale! WWAWaelewaW -1 (2) P=PIas1iC GAlass OxOther (3) N=Nitric Acid U,FLIPpreserved G=Conled I III =Surface Witter S0■;3011 GW=4round Wa er SL=61udEte “0civa 0=0thei SrSuifuric Acid 9=Seckorn Hydroxide T=Sodiurn ThioauRete Z■ZI c Acetate O=Other Relinquished by Date/ Time IO /i Reoelved by Date/ Time / 1 1. Relinquished by Date/ Time / Received by Date/ Time / Relinquished by 1 Ddte/ The / Received by Date/ Tirne I Shipped by l Date/ Tins / ed ' .1 of Lib • At ► d ..0 Ai q / Time d / /i iC6 Method of Shipment Requested Turnaround Time Standard Rush (Must t approved, additional charges &pply) Lab Lite only I shipped on : 09/30/1 shipping charge : Si.001 I Shipped 10: 0648 CR 126 ` Glenwood Springs, CO 81601 nitric . Acidify the sample with acid upon receipt at Hazen. COC Allard, sie226 na228 t:.AS • HAZEN Mew*rCb. htic. 01 Indiana St. .Iden. CO 80403 USA (303) 279-4501 x: (303) 278.1529 DRINKING WATER IMPURITY LIMITATI N$ The following a list of the mandatory radiological paramettls for Public Water Supplies, together vvtth their it s. as established by the Colorado Departmeet of Health. Maxirnur* Contaminant Lev i Gross 1pha note 1 Adjus ► Gross Alpha 15 pCi/ii note 2 Gross - - to 50 pCi/I Total • lids note 3 1 Hadi Y 228 note 4 Rediu 228 note 5 ! Urani 30 µg/i Redo mote 6 1 Triti 20,000 Stront m GO 8 pCill Notes 1. The limit for rose Alpha Is 15 pCi/1 after subtracting Uranium.; 2. Adjusted Grs Alpha is calculated by subtracting the result for Uranium from the result for Gross Atphl. 3. There is no Maximum Contaminant Level for Total Solids. Thie is a "Monitoring Requirement Only. I i 4, The Maxim Contaminant Level for Radium 226 gjo l #itin11228 Is 5 pCifl. 5. The Maximu f Contaminant Level for Radium 226 RUA Radiuml228 is 5 pCill. 6. The Maxim Contaminant Level for Radon is in the process of being set by EPA. The proposed ii for Radon is 300 pC1/l or 4000 pCi/1 depending oil whether or not there is a state devel program for the control of radon In house air. Robert Roslad Manager, General Analiiiical Hazen Research, Inc. ; I 303 279 4501 ex 217 ; I` is ramodLwpe Mw 1 eXV200111 JAMES P. MAHAN, JR. 901 BOYLSTON DRIVE LEESBURG, FL 34748 63 63512809 114 2 1478567 Sot) 1) 0O5 -5U!G $ -a 7,c. /...._. _. tea: USB UNITED SOUTHERN LEB�IACa $ L34749' i:06 3 L0 5 28 Si: L4 856?n L L4 2