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HomeMy WebLinkAbout3.0 CorrespondenceGARFIELD COUNTY BUILDING AND PLANNING August 17, 1994 Ms. Rosemarie Glas 2518 County Road 137 Glenwood Springs, CO 81601 RE: GLAS SUBDIVISION EXEMPTION Dear Ms. Glas: On April 15, 1994, the Garfield County Board of County Commissioners denied your application for a subdivision exemption, located off of County Road 137, approximately 1.5 miles up East Cattle Creek, northwest of Glenwood Springs due to access and topographic constraints. If you have any questions, please feel free to contact this office. Svhc:e David H. Michaelson Planner DHM/sa 109 8TH STREET, SUITE 303 • 945-8212/625-5571/285-7972 • GLENWOOD SPRINGS, COLORADO 81601 MEMORANDUM TO: BOARD OF COUNTY CO ISSIONERS FROM: Dave Michaelson, Plannin-� RE: Glas Exemption Plat, Continued Public Meeting DATE: 4-5-94 Attached for your reference are the following: 1. April 4, 1994 letter from Terry Wood, District Ranger from the Rifle Ranger District, describing agreements reached concerning the Keyser Creek Trail. The Forest Service is amenable to relocating the trail, based on compliance with several conditions; 2. March 24, 1994 letter from Dr. Nick Lampiris, addressing the geological constraints on the site. Nick has identified an area of approximately 12 to 20 acres with less than 40 percent slopes, although concrete building sites have not been established. 3. Proposed conditions of approval presented at first hearing. USFS_RIFLE United States pertinent of 1 TEL No .3036252371 Hpr 4,94 13:3c1 Ni:I .001 P.01 Forest White River Rifle Ranger District Service National 0094 County Rd 244 Mr. Mark Bean Garfield County Planning Department 109 8th Street - Suite 303 Glenwood Springs, CO 81601-3303 Dear Mr. Bean: 1 Reply to: 5460/1600 Date; April 4, 1994 We will be unable to attend the continuation hearing on the Ciao subdivision April 5th. Therefore, we are forwarding the following comments for your consideration. On Tuesday, March 29, 1994 the Forest Service met with Mr. Rudy Steele and Ms. Glee at the Keyser Creek Trail. We looked at re-routing approximately 150 feet of the trail. The section of trail to be re-routed would be from the trailhead on. The Forest Service does not have any objection to this reroute provided the following conditions, discussed with Mr. Steele and Ms. G1as are met. The new portion of trail should be surveyed after it is built, Ms. Glee will arrange for the conatruction of the new trail, however the Forest Service will be happy to come and and meet with her to flag in the exact location. A new deed will be prepared and signed giving the United States Government a 10 foot right-of-way. At that point, the Forest Service will terminate the old deed. If there are any questions please do nothesitate to contact myself or Cindy Hockelberg at 625-2371. Sincerely, TERRY K. 40D District Ranger ccs Mr. Rudy Steele Ms. G1as Mr. Mike Mottice, BLM OPTIONAL FORM 99 (7-90) (4a4 Devi 1') _ 1-19)1 00 FAX TRANSMITTAL N of Degos r To D Oe ckAetsmn Dep104pm0y C,p,el,0 p Fox*qqc- �1l NSN 7640-01-317. 7388 From is phone N �Z -123 Fax* Caring for the Land and Serving People 5099-101 GENERAL SERVICES ADMINISTRATION F$-6200-2$ (7-$2) 1 Nicholas Lampiris, Ph.[]. CONSULTING GEOLOGIST P.O.BOX 2 SILT, COLORADO 81652 (303) 876-5400 (24 HOURS) March 23, 1994 Rudy Steele Springs Center, Suite 213 118 W. 6th St. Glenwood Springs CO 81601 RE: Rosemary 8las, 80 Acres Dear Mr. Steele: I have completed my geologic investigation of the developable portion of the 80 acres in the N 1/2, Na 1/4, Section 18, T 5 S, R 89 W, 6th FM, within the Storm King Mountain 7 1/2 minute quadrangle, Garfield County, Colorado. This is about 1 1/2 mile~ up East Canyon Creek (Keyser Creek), northwest of Glenwood Springs. The developable portion of the property is in the western half in the valley areas of the creek. The topography of the areas where five cabin sites are desired is that of the physiographic flood plain of the main creek and one of its tributaries from the east. There are numerous cottonwood trees, some conifers, ferns, and other riparian shrubs and grasses. This area, which has been delineated on the accompanying map and ki-iked yesterday, includes between 12 and 20 acres of land with less than 40% slopes. There are some steep stream banks that will subtract marginally from these estimates. Within this developable area are an access road to an adjoining property, a trail leading into Federal land, and an irrigation ditch with weir and spillway. These have been sketched in at an earlier date and are only approximately located. The northwest valley wall is quite high and steep with extensive rock outcroppings forming the ridge line. Talus slopes lie beneath the cliffs down toward the valley floor. The other side of the valley is much more benign with outcroppings L,Apable of shedding rocks appearing only above where the trail begins to steepen siinificantly at the northeast end of the developable portion of the property. The surficial geology of the valley area consists of silts sands, cobbles and boulders in the form of glacial drift and ' reworked all` rial deposits associated with the creeks. These are of Quaternary age. In addition, there are Some debris fa'' deposits out of the tributary drnage that inter -finger with the alluvial deposits. The bedrock geology under this part of the valley is Prohably a series of gneisses of Precambrian age overlainb sandstones and carbonates. The rock unit formithy Paleozoic of the northern valley wall is ng e ridgecrest Leadville Limestone, These beds a carbonate' probably the are down - valley fs rom this property an ea nearly flat lying, but east -west trending fault brings the Permian age Belden Formation' a shale and mudstone, into a vertical position in the valley walls. Because of the severe rock fall hazards on thel north side of the valley, I recommend only s opes on the of the stream. That would be at the one site on this side between the irrigation ditch and theeast �nd of the tract Creek. The bank overlooking the bank down to East Canyon creek is the most distant location and therefore the safest for a site. A setback of twenty feet from this steep bank is recommended. No mitigation will be necessary for rock fall at distance from the base of the l this site because of the generated. However, it will be slope where the rock falls are 100 feet above the ' prudent to culvert the ditch for breaching and t e cabin site to protect it from leaking or even this it, o provide access over the ditch Upstream f site on this side of the valley should b ^ from sites because of the rock fall hazards, e avoided for home Rocks cannot reach the other side of the st sites can be located between the base of th ream so that four banks with safety. On this side of thee s�ope and the creek selected, at the next step in this project, sites should be in case it should overflow its banks. ' away from the stream an however. More likely is the possibility This is not likely, tributary stream which could b dry of mudflows out of the e between the stream and the hill=idezrected toward homes located are safest from mudflows but ^ Homes nearer the hillside this slope, may be subject to smuw slides from Therefore, for this side of the valley I recommend bermi homes ro either direct mudflows around the sites ng around closer to the hillside, to direct snow slid ' or, for those es Neither type of hazard has a high likelihoodofarou»d the sites` occurring but the specific design should be required after the fi selected for each of these four units, na1 site has been In each case I recommend soils testing for proper foundation design, especially due to the potential for high ground water at some sites. Water through the development of wells should be available within 100 feet at all sites. Waste disposal systems should be designed by a civil engineer due to the proximity of the stream and possible high ground water table. Near surface bedrock will not be a problem. Each home should be designed to preclude the accumulation of radon gas as that is standard practice in this State. Access to the westernmost three sites will be readily available off the existing road, while the other two sites All need driveways constructed to them along gentle grades, but with possible culverting necessary. Slopes greater than 30% should be avoided for the actual building sites, and the hillsides should not be cut into unless retaining walls are designed. The several gullies within the flood plain should also be avoided and the highest ground chosen for the site. This project should be a geologically sound one if the previous recommendations are followed, including further work at the site specific stage for proper drainage and berm designs.If there are other questions please contact me. Sincerely, .Jh 1144,1 - Nicholas Lampiris Consulting Geologist '`� • 4563/!! NW 290 (ADAMS LAKE) 6247 292 , 293 ,\7112:7;akiraffiralri 41,11 .-. _ ,/,'' 1 , , i ( , ',.., -.7 4 -,'. t''f 7/ /,' '7 j,) i • .'-:-/--/ 'Yj.-- -X**' / • il 6 '(// -:.:-. ..o.... -.... /,' / '-v.,/ • /•'• , ; 1/2 ...,......_ .:. .-_,..-- 799-'r7-,-,- _...„- ..„-- .J. . . / s 294 8 00 . I ' 7600 ( ( (,‘ • ).,Z or) y.// ,4 Mount - • 29 GLAS EXEMPTION - CONDITIONS OF APPROVAL 1. That all representations of the applicant, either within the application or stated at the meeting before the Board of County Commissioners, shall be considered conditions of approval. 2. Prior to the presentation of a final exemption plat, the applicant shall submit evidence, signed and stamped by a registered Engineer, that each proposed lot can accommodate a single family residence and a leach field. Building envelopes, consist with the finding of the applicant's engineer, shall be shown on the plat. Any specific mitigation measures shall be included as plat notes. 3. A Final Exemption Plat will be submitted, indicating the legal description of the property, dimension and area of all proposed lots or separate interests to be created, access to a public right-of-way, building envelopes approved by a licensed engineer, and any proposed easements for drainage, irrigation, access or utilities. The Keyser Ditch, including wasteways, spillways and proposed culverts/bridges, shall be shown on the plat. The relocation of the Keyser Creek Trail, consistent with conditions in a 4-4-94 letter from Terry Wood (District Manager, Rifle Ranger District), shall be shown on the plat. 4. That the applicant shall have 120 days to present a plat to the Commissioners for signature. Extensions of time may be granted if requested prior to the expiration date. 5. That the applicant submit $200 in School Impact Fees for the creation of each new lot. 6. Driveway permits, if necessary, shall be obtained from the Road and Bridge Department prior to the issuance of a building permit. 7. The following plat notes, in addition to any mitigation suggested by a licensed engineer, shall appear on the final exemption plat: 1. The recommendations of the Colorado State Forester, wildfire prevention guidelines, specified by the pamphlet entitled "Wildfire Protection in the Wildland Urban Interface" prepared by the Colorado State Forest Service (C.S.F.S. #143-691) shall be followed in the construction of all structures. No combustible roofing materials will be allowed. 2. Well permits for the exemption parcels are limited to use inside one single family dwelling only. Outside use for lawn and garden irrigation or livestock are prohibited. 3. Adjacent public land is subject to existing and future grazing leases. 4. A USFS trail traverses the property. Future owners must be aware that public access must be maintained as platted. 8. Control of noxious weeds is the responsibility of the property owner 9. The deed for the relocation of the Keyser Creek Trail shall be recorded prior to the signing of the Exemption Plat.