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Home My WebLink About20031438.tiff •• 4311 Highway 66, Suite 4 • Longmont, CO 80504 Office (970) 535-9318 Denver (303) 485-7838 Fax: (970) 535-9854 Environmental Services, LLC Weld County Planning Department February 11,2003 GREELEY OFFICE Mr. Chris Gathman FEB 1 2 2003 Weld County Planning Department RECEIVED 1555 N. 17th Avenue Greeley, CO 80631 Dear Mr. Gathman, This letter is to identify gravel resources and potential restrictions to obtaining gravel resources on the Reynolds property associated with the proposed Aurora Dairy expansion. High Plains Engineering conducted a preliminary investigation of soils on the Reynolds property located at 6828 Highway 66. A report dated November 20, 2002 is included in the Special Use Permit application materials. Two four-inch diameter borings were advanced to a depth of twenty feet at the southern-most area of planned construction for the proposed Aurora Dairy expansion. Silty gravel was identified at 13 to 14 feet below ground surface. Due to the proximity to the Saint Vrain River and other gravel operations located in the area, if recoverable gravel resources exist it would be located on the southern most portion of the site and that the gravel deposit thins to the north as elevation increases due to a shale bedrock shelf. Planned construction will occur on the higher shale shelf. According to State Statute 34-1-305,Preservation of Commercial Mineral Deposits for Extraction Part(2)states, 'After adoption of a master plan for extraction for an area under its jurisdiction, no board of county commissioners, governing body of any city and county, city, town, or other governmental authority which has control over zoning shalt by zoning, rezoning,granting a variance or other official action or inaction,permit the use of any area containing a commercial mineral deposit in a manner which would interfere with the present offuture extraction of such deposit by an extractor." Part(3)states, "Nothing in this section shall be construed to prohibit a board of county commissioners, a governing body of any city and county, city, or town, or any other governmental authority which has control over zoning from zoning or rezoning land to permit a certain use, if said use does not permit erection of permanent structures upon, or otherwise permanently preclude the extraction of commercial mineral deposits by an extractor from land subject to said use." No construction is planned for the southern portion of the site. The southern-most planned construction will consist of stormwater retention structures and fences for livestock. Should gravel extraction be viable,economic or necessary,none of the planned construction is permanent and would not impede exploration according to State Statute 4-1-305,parts(2)and(3)as outlined above. Si ce ly Thomas Haren Environmental Consultant = EXHIBIT Your "Pro Ag"Environmental Professionals S Q. 2003-1438 FROM 1 RgPRO ENV SVCS FRX NO. : 9705359854 Apr. 04 2003 10:56RM P10 Stewart Environmental ( :cntstllnint•,, Inc. consulting enyineers and scientists r Corporate Office&Laboratory: 3801 Automation Way, Suite 200 Fort Collins, Colorado 80525 ph: (970)226-5500 fax: (970)226-4946 www stewartenv.com Branch Office: 20 Boulder Crescent April 2, 20()3 Colorado Springs, Colorado 60903 ph: (719)634-3793 fax: (719)442-6596 Thomas Hazen AgPro, Environmental Services, LLC 4311 Highway 66, Suite 4 Longmont, CO 80504 Subject: Reynolds Property,Proposed Aurora Dairy Expansion-Access to Gravel Resources Job No.: 2606-004 Dear Mr. Haren: With regard to the Reynolds property and the proposed Aurora Dairy expansion, I have reviewed your letter dated February 11,2003 and two reports from High Plains Engineering dated November 20,2002. The site is comprised of two topographic areas;a southern area of heterogeneous alluvial deposits associated with the river and a northern upland terrace area underlain by clay, sandy clay, and/or weathered shale. Based on information in the engineering reports and topography of the site, I concur with your assertion that recoverable gravel resources most likely occur within the alluvium on the southern portion of the property below the river terrace. It is my understanding that no permanent structures are planned for the southern portion of the property. Storm water retention ponds and fences may be built, but neither these features nor the proposed agricultural operations on the northern portion of the property should preclude exploration or extraction of sand and gravel from the southern portion if the owner should chose to engage in mining operations. Based on our discussions and the information provided, it is my opinion that the proposed use of the property does not contradict the limitations cited in Colorado Revised Statute 34-1-305 concerning interference with present or future extraction of sand and gravel from the southern portion of the property If you have any questions or comments relative to this report, please contact our office. Sincerely, STEW_A2 71eON NTAL CONSULTANTS, INC. ...-...--7 � Paul A. o eP.G. r- j + EXHIBIT Senior Geologist 5 6 2606-004kcynolds prop expansion 02apr03.1tr \ High Plains Engineering ''1b 735 Denver Avenue • Fort I_upion CO 8062 Phone 303-857-9280 • fax 303-857-9238 PRELIMINARY SUBSURFACE INVESTIGATION AND FOUNDATION RECOMMENDATIONS Prepared For: AG Pro Environmental Services Attention: Tom Haren — 4311 Highway 66, Suite 4 Longmont, CO 80504 _ Job Site Located At: "Reynolds Feed Lot" "Proposed Lagoon Site" — 6828 Highway 66 The East '/2 of the NE 'A and the NE 'A of the Southeast 'A — Of Section. 30, T3N, R67W, of the 6th P.M. Weld County, CO November 20, 2002 JOB # 02-2780 f • 9` Todd M. Schroeder, PE t 33548 jet o��sPONAI E�� PURPOSE: This report reflects a preliminary soils investigation from soil borings to determine the subsurface soil identification, and to determine the physical characteristics of the soil. The recommendations contained in this report are based upon the results of field and laboratory testing, engineering analysis, and experience with similar soil conditions. LOCATION AND SITE CONDITIONS: This report represents the results of the data obtained during the subsoil investigation at "Reynolds Feed Lot", for the proposed lagoon site at 6828 Highway 66, the East 1/2 of the NE '4 and the NE ' of the Southeast ' of Section. 30, T3N, R67W, of the 6`h P.M., Weld County, CO. The site is presently a large vacant parcel. This large parcel appears to have gently rolling topography, with approximately 1.0% to 1.5% slopes to the Southeast. — SUBSOIL CONDITIONS: Two, four-inch diameter holes were drilled to a depth of twenty feet at the building site on November 12, 2002, as shown on the attached site map. Samples of the soil were taken at two-foot intervals. These samples were analyzed in the field and laboratory to determine the characteristics of the • soil for identification and foundation design. In general, the soil profiles in the two test holes did not vary to a considerable degree, as the attached profile hole logs indicate. The Standard Penetration Test similar to ASTM D1586 showed a range of 10-11 blows for 12-inch penetration, at a depth of 4 feet and a range of 12-13 blows for a 12-inch penetration at a depth of 9 feet. Free water was encountered during the drilling operation at a depth of 19 feet. A secondary inspection indicated that the water remained at 19 feet two days after the initial drilling. SUBSURFACE ANALYSIS AND RECOMMENDATIONS: The clay layer from 4 to 14 feet may be excavated and possibly used as the lagoon liner. Additional testing would be required to determine if this material would meet the standard lagoon liner requirements. CONSTRUCTION DETAILS: In any soil investigation, it is necessary to assume that the subsurface soil _ conditions do not vary greatly from the conditions encountered in the field and laboratory testing. The accompanying report is presented using best professional judgment based on the limits of the extent of testing commissioned by the client. Our experience has been that at times, soil conditions do change and variations do occur. These may become first _ apparent at the time of excavation for the lagoons. If soils conditions are encountered which appear different from the test borings as presented in this report, it is recommended that this office be called to inspect the open excavation. This inspection is not part of the report. — -- DISCLAIMER: _ THE PARTIES SPECIFICALLY AGREE THAT HIGH PLAINS ENGINEERING, INC. HAS NOT BEEN RETAINED NOR WILL THEY RENDER AN OPINION CONCERNING ANY ENVIRONMENTAL ISSUES, HAZARDOUS WASTE OR ANY OTHER KNOWN OR UNKNOWN CONDITIONS THAT MAY BE PRESENT ON SITE. 0 1 2 SANDY CLAY(5C) 3 DIowcounts 11/12 4 5 6 7 _ 8 CLAY WITH LOW PLA511CITY(CL) Blowcounts 12/12 9 10 11 12 13 14 15 16 17 18 SILTY GRAVEL (GM) 19 20 50IL PROFILE HOLE #1 0 1 2 3 Slowcounts 10/12 4 5 SANDY CLAY(5C) 6 7 8 Slowcounts 13/12 9 10 11 CLAY WITH LOW PLASTICITY(CL) 12 13 14 15 16 17 SILTY GRAVEL (GM) 18 19 _^ 20 50IL PROFILE HOLE #2 I I I I I I I I I I I I I I I 1 I 1 I ) ) Location of Project:AG Pro/Reynolds Proposed Lagoons I Boring tio.j 1 I Sample lyo:d won ono& Clay with Low Plasticity(CL) Depth of Sample: 4 FEET I Tested BytIKK I Date 111/12/02 Moisture Content Wet Weight. 550.4 g. Blow Coverts.at Depth 11 /12 Dry Weight: 454.7 g. %Moisture: 17.4 g. Atterberg Limits Plastic Limit 17.24 Liquid Limit 29.08 Plasticity Index 11.84 Location of P AG Pro/Reynolds Proposed Lagoons I BorinaNarl1 I Sage No:l Description of Sot Clay with Low Plasticity(CL) Depth of Smolt 9 FEET I Testait8ir:JKK I Dat 111/12/02 Moisture Content Wet Weight: 542.1 9. Dry Weight: 454.0 9. f Blow Counts at Depth I 12 /12 %Moisture: 16.3 g. Atterberg Limits Plastic Limit 19.35 Liquid Limit 31.48 Plasticity Index 12.13 1 I I I I I I I I I I I I 1 I I I _ 1 1 AG Pro/Reynolds Proposed Lagoons tkip---1161110SigN 1 I.SONiliki)Ib SILTY GRAVEL(GM) .,.► __ 14 FEET ; ." _ i °. Z KK r Otlihrl11/12/02 x' ,,,_a,_n 597A Mil Approximate Minimum , 7 a 575.1 % 4S D1alccle[of Loges1 PaUS ; WeigM of Sample(g.) 3.7 ris $b.neve 200 14x.4 Sieve 500 310.2 attliehedf441290flr%%tut* 281.1 4+ 121.9 6070'' IS-ItA 38.4 " 11 43.97 140-2fit 43.4 13. 34.98 39.5. .74.,. 22.25 let30.1 9.7t;, 12..55 1�D ZUQ 9.2 2.1 Pan 29.7 : 957 0.01 3102 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I _ I 1 I I AG Pro/Reynolds Proposed Lagoons t t13~1642 ample-No:i . SANDY CLAY(SC) 9 FEET �, 41KK { Date:$11/12/02 551.4 rrill Approximate Minimum 486.1 Ncrxgkaed PJienitaeti i argest Particle tiVeicte of Sample(g.) I5Nltrll se. 11.8!IN ND,'t a e 200 Na 4Sieve 500 Drat Mitt 260.1 Wattled©9200 Dry 133.0 s LL 100 Ida 0.0 0.00_ 10000 fib. 0.5 , 0.19. 9921. I39 0.9 0.35p, 199A8 N0. 1.3 o. 96.96 24.5 4:42 89.54 fto. 97.2 37.87 52.17 I 135.7 I2.17: 0:60 290.1 I . a l t t t 1 t 1 ' i i I f i. w a ,. . . AG ProlReynolds Proposed Lagoons I i 4# 2 I 1e No:I ffk SANDY CLAY(SC) ; : m -9 FEET I ,- KK I Date_I11/12/02 t 551.4 Approximate Minimum 486.1 Mil Nortrinal erof Ltegest Particle Might of Sample(g.) 96 adtit1r'8: 11.8 la t+b.147iere 200 No.4 Sieve 500 ) DIY s 260.1 Washed©4200 Dry Weight 133.0 ink . 100 I No.4 0.0 QM 144600 tie, TO 0.5 0.79,. 99.81, No.20 0.9 0.35 99446 Now 0, 1.3 OS) 98:96 NO- 24.5 9.42,, 89.54 97.2 37.37 5217 Amt 135.7 52.17 0.00 280.1 I i I I I I I I I I I I I I I I I I I 1 ) AG Pro/Reynolds Proposed Lagoons [ 2 I Sample No:I r. , , SILTY GRAVEL(GM) .`4 13 FEET I T'rssieder[}(K I Dabs:I11/12/02 _«. ,ate„ \4`,nri 611.2 tin Approximate Minimum �`Ys' t�.,:'.a a 585.5 rin Nominal Diameter of Largest Particle Weight of Sample(g.) ""^ 4.2 rim No. 10 Sieve 200 No.4-Sieve 500 ) Dry Weight 297.5 Washed @4200 Dry Weight: 258.1 ` t, ;:: 100% 'asM 3 I `" .�.�-e,.-, .a o--- ate--d. y ... � No.4 168.1 38.52 43:48 Ito. 10 27.3 9.16 34.30 ft.'at 17.3 8)32 28A8 No.441 11.3 3.8E 24.68 Noy 10f? 14.1 4.74 19S4 No.290 18.8 6.32 13.82 Parr 40.5 13.82 0.00 297.4 ) S i ^+ n. "Reynolds Feed Lot" "Lagoons" 6828 Highway 66 The East 'A of the NE 'A and the NE 'A of the Southeast 'A Of Section. 30, T3N, R67W, of the 6th P.M. Weld County, CO — Er- o-1°t b r 5272-, 39 39`1` 3.7 38Li ' L1M313ND • - Percolation Holes X- Percolation Profile Hole A-Soil Profile Hole Hello