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Home My WebLink AboutWell Water Adequacy AnalysisJohn Plano From: Sent: To: Cc: Subiect: Eric Mangeot <eric.mangeot@lrewater.com> Monday, March 24,2025 9:03 AM Kara Byrne; Brett Smith John Plano Tiny Homes fi to, don't often get email from eric.mangeot@lrewater.com. Learn why this is important Kara and Brett, I just got off the phone with John Ptano with the Garfiel,d County ptanning department who is currentty reviewing your BWCD water attotment contract for the issuance of buitding permits for the two tiny homes. John woutd tike to see a copy of LRE Water's water adequacy report that inctuded the resutts of the pump test and water quatity. lwoutd send this report to him mysetf, but because I am wearing muttipte hats for this project (al,so as BWCD's Engineer), it woutd be better for you to send him this report directl,y. I woutd send him the version dated 03-19-2025 that was revised for up to 10 tiny homes that I sent to you [ast Wednesday. Ptease feel free to contact me if you have any questions. Best Regards, Eric F. Mangeot, P.E. Senior Project Manager Office: 970-945-6777 E ric. Ma ngeot@LREwate r. com CONHECTINC WA1EN TO LIFE LREWATER.COM 909 Cotorado Avenue, Gtenwood Springs, CO 81601 o **CONFIDENTIALITY NOTICE: This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclos ure or distribution is prohibited. lf you are not the intended recipient, please contactthe sender by reply email and destroy all copies of the original message. Thankyou. WATER 1 WATER CONNECTINC WATER TO LIFE KBBS Holdings, LLC c/o Kara Byrne 248 Skipper Drive Carbondale, CO 81623 kara@vou ra I ohawed d i nq. com March 19,2025 Via Email RE: Well Water Adequacy Analysis Dear Kara, At your request, LRE Water analyzed the water quantity and water quality associated with the newly constructed well, Well Permit No. 334958 ("Well"), located on the KBBS Holdings, LLC property located in the Lookout Mountain Ranches subdivision near Glenwood Springs, Colorado (Garfield County Parcel No. 218512402034). A location map is included as Figure 1. LRE Water conducted a24-hour constant-discharge pumping test on the Well. The pumping test was performed to evaluate the well yield under current aquifer conditions. The test was performed during the time of the year when groundwater is seasonally lower due to minimal recharge. The well water is produced from an unconfined aquifer, which largely recharges from snowmelt run- off and precipitation. ln addition to the pump test, water quality samples were collected and analyzed. This letter report summarizes the opinion and findings of LRE Water regarding the adequacy of the physical water supply for the proposed development on the property. WATER DEMAND LRE Water recently applied for a Basalt Water Conservancy District (BWCD) water allotment contract which is the legal water supply for the proposed domestic water uses. The contract covers ten tiny homes and up to 3,500 square feet of irrigation on the property. Proposed annual demands are 2.94 acre-feet (AF) for indoor use and 0.146 AF for irrigation for a total of 3.086 AF. WATER SUPPLY WELL CONSTRUCTION The Well was constructed on October 28,2024, by Shelton Drilling Company. The total depth of the well is 555 feet and it was constructed with 7-inch diameter steel surface casing with perforated steel casing installed in the water producing zone from 507 feet to 547 feet. At the time of the well construction, static water level was 470 feet from the top of casing ("TOC") and the well produced 8+ gallons per minute ("gpm") during a 2-hour test. 909 Colorado Averrue Glenwood Sprinus, CO 81601 | Ofl'ice: 970-945-6777 | LREWATER.COM ROCKY MOUNTATN I MTDWEST I SOUTHWEST I TEXAS Page 2 of 3 PUMPING TEST ANALYSIS On December 12,2024, LRE Water met Samuelson Pump Company (Well pump installer) at the well site, The test pump was installed near the bottom of the Well at 520 feet. A vented pressure transducer was deployed in the Well and was set to record pressure and temperature readings every minute during the test. The static water level prior to the test was measured tobe 262.2 feet below the TOC. An average pumping rate of approximately 8,7 gpm was calculated over the Z4-hour pumping period, with a maximum pumping rate of 10.0 gpm and a minimum pumping rate of 7.85 gpm. Throughout the pumping test, manual data was also collected in the field to determine if changes to the flow rate were necessary. The test began with an initial rate of approximately 8.0 gpm and was increased to 10.0 gpm after 19 hours of pumping. The 10.0 gpm pumping rate was maintained throughout the remainder of the pumping test. The 1.0.0 gpm pumping rate was the maximum rate the test pump was able to produce. The water level reached a maximum drawdown depth of 463.09 feet below TOC (0.89 feet of drawdown compared to static water levels) at the end of the test. Figure 2 graphically shows the manual water depth measurements that were recorded during the test and Figure 3 shows the drawdown in greater detail. The Well experienced minimal drawdown (-0.6 ft) in the first 19 hours of pumping; therefore, the pumping rate was increased to 10 gpm. After approximately 1.5 hours of pumping at 10 gpm the aquifer reached a steady state. ln a pumping test, reaching a steady state means that the drawdown in the aquifer has stabilized and the water level and cone of l^^-^^^i^^ ^-^ ^r^Ll^ TL:- ---,.-- ...L-- rL- -L--.,- :- l..^.,.1-.-.^ :- ---- -- ----t. --l :-ut,Pre5sluil dre sri1ulc. rilrs uuuurs wlrglr t1lc ul tdllge iltulawuuwll t5 zelu ul lrudlty zelu dlru l:' indicative of a healthy aquifer. Over the 24-hour pumping period, approximately 12,535 gallons of water were pumped from the Well. ln addition to monitoring the water level during the pumping test, it is equally important to monitor the recovery process. Therefore, the pump and pressure transducer were kept in place at the conclusion of the test. The water level in the Well experienced 100% recovery within the first minute. Figure 4 depicts the water level recovery in the Well. ln Figure 5, T represents the totaltime since the pumping test started and T' represents the time since pumping stopped. The Well reaches complete recovery at Tff' greater than 2 (48 hours / 24 hours), which means the Well recovered faster than the rate at which the Well was pumped. This indicates that, at the time of the test, the Well completely recharged at a rate equal to or more than the 8.7 gpm average pumping rate. ln other words, the recovery data indicates that the \A/pll r.nrld ha nrrmnod el a rata hinhar fhan R 7 nnrrt' Yr"" WATER QUALITY The Well was sampled for a standard suite of parameters in accordance with CDPHE Regulation l\ln 4 4 - Calnradn Drimanr ['lrinlzinn \A/afar Panr rlafianc Qamnlac rerara analrrzad hrr Nlatinnalr rrrrrurt "tt, rr\rtrv vrqLvr r\vvvrqLrvrru. vqrrryrvu rrvrv srrqrJ4vv v)l rrurrvrrqr Page 3 of 3 Testing Laboratories, Ltd. The water quality results are tabulatedin Table 1 and a copy of the lab results are also attached. Overall, results indicate that the Well has good water quality for potable consumption and use. The water quality results indicated the presence of coliform, but E. coli was not present. The lab results only indicate that coliform was present and did not detail the type. While most coliform bacteria are not harmful, some strains can cause gastrointestinal illness. The presence of coliform could have been a result of field contamination from equipment used for testing or during construction. To address this, LRE Water recommends using shock chlorination to disinfect the Well prior to using the well as a potable water source. Water quality results also indicated hard water at a value of 190 mg CaCOs/L, which is typical for wells in the area. While there is no CDPHE standard for elevated hardness and no treatment is required, LRE Water recommends that you consider utilizing a water softener as hard water can lead to considerable scale buildup and staining. CONCL USION The results from the pumping tests indicate that the Well has more than sufficient yield to serve the proposed domestic water uses. The aquifer drawdown during the pumping test was minimal compared to the available drawdown, and the aquifer recharged by 100% within one minute after pumping ceased indicating a healthy aquifer capable of producing at a rate of at least 10 gpm. The water quality results indicated good water quality for potable consumption. However, LRE Water does recommend using shock chlorination to disinfect the well prior to use. ln addition, LRE Water also recommends that you also consider the use of a water softener. Should you have any questions, or require additional information, please do not hesitate to contact me by email at anqela.schenk@lrewater.com or by phone at (970) 945-6777. Sincerely, LRE WATER Proj Manager Hydrogeologist Project Number 217 21KBBS01 (1 ) WATER Test Well Permit No. 334958 KBBS PROPERTIES LLC BOUNDARY SE114 SE1/4 Section 12, Township 6 South, Range 89 West, 6th P.M I '1,000 Scale:1"=2,000' Figure 1: KBBS Holdings Test Well Location Map Job No.21KBBS Holdings, tte 460,0 460.5 461.0 461".5 462.O 462.5 463.0 463.5 464.CI 464.5 455.0 L Note: Exponential smoothing was used on the depth of water dataset. Figure 2: Depth from Top of Gasing (TOC) Monitoring Well Permit No. 334942 Notes 1.) lnitial Water Level = 2.) FinalWater Level = 3.) Pump lntake Depth = 100 Pumping Time (minutes) .A. Static Water Level (ft) Depth of Water from TOC Manual Measurements Flow Rate (gpm) 462.2ft. 463.09 ft. 520 ft. below Top of Well Casing below Top of Well Casing from Top of Well Casing :3o € 7cl o EqT' 3 oo (Jo Eo ! CLoo 10.0 8.0 6.0 4.0 2.O 0.0 .....:" l ,A i i -i - - - q - - --a = L j 'i^'[-" A A n- L 1* .--l Static Water Level = 462.2fL Average Pumping Rate = 8.7 gpm I WATER 10 1000 ozt03t2025 L Note: Exponential smoothing was used on the drawdown dataset. Figure 3: Drawdown Analysis Monitoring Well Permit No. 334942 Drawdown (ft) Flow Rate (gpm) 6- €voao &T' 3 oo g 3oTI 3l! a 0.0 0.1 0.2 0.3 o.4 0.5 0.6 o.7 0.8 0.9 1-.0 11.0 9.0 7.O 5.0 3.0 1.0 -1.0 ./-. Average Drawdown Minute 100 to 1000 = 0.79 ft. wil I \\ftrr ) h tr J 10 Pumping Time (minutes) 100 1000 02n312025 ^4. Static Water Level (ft) Residual Drawdown (ft) Manual Measurements Figure 4: Recovery Analysis Monitoring Well Permit No. 334942 456 RecoveryTime (minutes) 462.O oo uo Eo.! 463.0 -g o.o6 460.0 461.0 464.4 \ 10987321 I WATER 465.0 0 02t03t2025 oo o o(,o cE, 0,0 0.L 0.2 0.3 o.4 0.5 0.5 0.7 0.8 + ResidualDrawdown (ft) T = TotalTime (Pumping & Recover) T'= RecoveryTime Figure 5: Recovery Analysis Monitoring Well Permit No.334942 Notes:1.) The recharge rate of the well is equal to or greater than the average pumping rate ( gpm), when recovery occurs at or before T lT' = 2 (48 hrs I 24 hrs) 2.)Tn'= - lMl mins (1441 minutes / 1 minute), Aquifer had recovered 100%. 1 l I l l 10 T/T'(minutes) 100 1000 02!03t2025 Table 1 Regulated Water Quality Parameters Well Permit No. 334958 ND = Not Detected * National Standard, which is not an EPA enforcable MCL Units 1211112024 PresentTotal Coliform Parameter MCL MPN/100mL mg/L Absent 0.007 E.coli Arsenic 0.01 0.74Barium2mg/L NDCadmium0.005 mg/L Chromium 0.1 mg/L ND Fluoride 4 mg/L ND Mercury 0.002 mg/L ND Nickel N/A mg/L ND 0.05 mg/L NDSelenium 10 mg/L NDNitrate - N 0.05 - 0.2 1 mg/L mg/L ND ND Nitrite - N Aluminum 250 mg/L NDChloride 1.3 mg/L NDCopper 2 mg/L NDFluoride mg/L 0.024lron0.3 mg/L NDLead0.015 mg/L NDManganese0.05 7.7pH6.5 - 8.5 mg/L NDSilver0.1 NDSulfate250mg/L 230TDS500mg/L ND ND No detected VOCs or SOCs mg/L as CaCO3Total Alkalinity 5Zinc mg/L Uranium 0.03 mg/L 200 mg/L as CaCO3 190Total Hardness*100 mS/L 71.5Calcium mg/L NTU 3.77 0.2 Magnesium Turbidity mg/L NDOrtho Phosphate VOCs & SOCs (only noting detected compounds) Radlonucllcles Total Coliform Primary MCLs Secondary MCLs Corrosivity and Hardness Additiolral WQ Pararrrters W@ 0210312025