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HomeMy WebLinkAbout03.06 Binder 2 - Appendix G• • • APPENDIX G SPRING VALLEY RANCH PROJECT GARFIELD COUNTY, COLORADO WEED INVENTORY AND CONTROL PLAN October 15, 2007 PREPARED FOR: Spring Valley Holding, LLC. 4000 County Road 115 Glenwood Springs, Colorado 81601 PREPARED BY: Gamba & Associates, Inc. Consulting Engineers and Land Surveyors 113 Ninth Street — Suite 214 Glenwood Springs, Colorado 81601 Phone: (970) 945-2550 Fax: (970) 945-1410 T. Carter Page, P.E. 35161 INTRODUCTION AND LOCATION This report was prepared to meet the requirements of the Garfield County Board of County Commissioners Preliminary Plan Resolution 2005-84, regarding the requirement that a noxious weed inventory and control plan be included with any final plat application. Spring Valley Ranch PUD is located at the intersection of Garfield County Roads 114 and 115. WEED INVENTORY The Spring Valley Ranch P.U.D., contracted with Outdoor Services of Rifle, Colorado, a licensed and insured weed control company to perform an on-site inspection of the entire Phase 1 site. Outdoor Services was provided with a color map of the areas that are part of Phase 1, which also showed the existing ranch roads on the site. Outdoor Services was taken on a tour of the site, and shown the limits on the ground. Outdoor Services made a detailed inspection of the entire site, using ATV's to cover the area, and collected GPS data of all weed infested areas that were found within Phase 1. Then they mapped all weed infested areas on the base maps provided based on the GPS data collected. In some cases, the shape and size of areas with major weed concentrations were mapped, and in other cases, individual weed plants were located. Outdoor Services also prepared a report listing the major areas of weed infestation, and the specific types of weeds found within Phase 1. A total of twelve separate species of noxious weeds were found and identified in Phase 1. For two of those species, only a single plant was found. A copy of that report, and Outdoor Services letter proposal and qualifications are attached. The weed inventory was provided to Gamba and Assoicates, Inc. from which we prepared an AutoCAD drawing showing all of the weed infested areas found by Outdoor Services. A color copy of the Weed Inventory Map is also attached to this report. WEED CONTROL PLAN Outdoor Services has also prepared a proposed weed control plan to be implemented this year, with additional sprayings next year. A copy of that proposal is also attached hereto. Spring Valley Ranch PUD — Weed Inventory and Control October 15, 2007 Page 2 of 3 EROSION CONTROL, STABILIZATION AND REVEGETATION Attached hereto are construction specifications for erosion control, stabilization and revegetation. All areas disturbed during the construction process are to be treated in accordance with the attached specifications. CONCLUSION The attached documents show the extent and types of weeds found within the area of Phase 1, Spring Valley Ranch P.U.D., and provide a systematic approach to their control. The erosion control, stabilization and revegetation specifications attached provide detailed procedures and specifications for insuring that all disturbed areas are properly stabilized and reclaimed. Spring Valley Ranch PUD — Weed Inventory and Control October 15, 2007 Page3of3 • a •d Weed Inventory and Mapping Proposal Spring Valley Ranch Outdoor Services will assist Gamba & Associates with the weed inventory and mapping at the Spring Valley Ranch Subdivision at a total cost of $5500 for phase one. Areas to be included in the mapping for this phase are shaded green on the existing conditions map with weed inventory areas dated March 9, 2007. Outdoor Services will prepare a report that will identify what noxious weeds are present and provide GPS points of infestations to Gamba. Large infestations will be drawn on to the maps provided with at least one GPS point in the center of the patch. Outdoor Services will recommend what herbicides to use for best control of the species of weeds found. We will also provide recommended timing and rates of herbicides to be used for herbicide treatments and how to control the weeds in areas that are revegetated. We will also provide Garfield County with records of our herbicide applications. This is done on developments to provide proof that the developer is controlling the weeds on the property. Outdoor Services is a licensed and insured weed control company that has extensive experience working with governments, non-profit agencies and developments for weed control. We have the time, equipment and manpower necessary to undertake an additional contract of this size. Outdoor Services staff consists of two full time people. This is a small company but through working together for several years we have developed very efficient methods and equipment for weed control. The herbicide application equipment we have includes a large truck mounted unit, with provisions for refilling the ATV's, two six wheel drive ATV's and backpack sprayers. The two six wheel ATV's are used for most of our work. These ATV's have a small bed and carry a spray rig very similar to those normally mounted on trucks. These spray rigs are powered by a separate gas engine and they carry fifty gallons of water. They also have an electric rewind hose reel with 175 feet of hose, and a boom setup to spray 35 feet wide swaths. We have delt with all of the commonly found noxious weeds on the western slope of Colorado as well as the less commonly found species. We have found and treated Absinth Wormwood, Purple Loosetrife, Cypress Spruge, Myrtle Spruge, Leafy Spruge, Teasel and Bouncingbet. We are also always on the look out for the entire list A species as well as the rest of the Colorado listed noxious weeds. Outdoor/Services can provide the herbicide application for Spring Valley Ranch on a time and materials schedule. Labor and equipment rates for 2007 are $120 per man hour. We will also provide an estimated cost or suggested annual budget for weed control for 2008. Please don't hesitate to call me if you have any questions. Thank you for your c. nsideration Ban -y Stahl 200T -S29 -0L6 saotnJag Joopl.n0 d6S:90 L0 06 2nd "Cape C • Outokmir cd°.SPil/tn/Ce& 970-625-1002 eed SfirY1YtiT 970-618-2800 Spring Valley Ranch Weed Inventory Spring Valley Ranch ranges in elevation from 6900 to 7900 feet with one parcel in this plat at 9300 feet in the inventoried area. The ranch is divided by County Road 115 with County Road 119 along part of the southwest boundary. The area between these two county roads is primarily irrigated and dry land hayfields with some wetlands areas and patches of oak brush. The dry land hay fields have been reseeded within the Last two years. The areas that have been reseeded are starting to get some grasses established. These reseeded areas have some patches of weeds that need to be controlled to prevent their further spread and allow the grasses to establish as good cover to prevent reinfestations of weeds. The area to the north of County Road 115 is primarily oak and sage brush with some open meadows. The open meadows and roadsides have infestations of weeds as mapped. The weeds are confined to these areas and have not spread into the brush in most areas. The exception to this would be along Landis Creek where the Plumeless Thistle is in the brush in the creek bottom. Outdoor Services has traveled all of the open meadows, hayfields and roads in the current project area at Spring Valley Ranch. We have found the following noxious weeds to be present; Canada Thistle, Plumeless Thistle, Musk Thistle, Scotch Thistle, Houndstounge, Burdock, Dalmatian Toadflax(one plant), Absinth Wormwood(one plant), Russian Knapweed, Diffuse Knapweed, Leafy Spurge, Yellow Toadflax The most abundant weed species found are Canada Thistle, Plumeless Thistle and Musk Thistle. Canada Thistle is found in most of the newly seeded hayfields, along the edges of the wetlands areas and some scattered along the roadsides. Infestations range from lightly infested small patches to lightly infested 10+ acre patches. There are also some 30-50 feet diameter patches that are heavily infested. The hayfields on the north side of County Road 115 have Canada Thistle wide spread throughout the fields although most of it is sparsely populated with plants spaced 2-3 feet apart. The hayfields on the south side of County Road 115 have smaller patches that are very dense with the plants touching each other. Plumeless Thistle is found throughout the ranch in scattered patches. Most patches are light to medium densities. The heaviest densities are found in patches along Landis Creek in the brush and grass close to the creek. Patches range in size from a few plants to about 5 acres. • 7950 County 10309 Qif1e CO 81650 BBB MEMBER MOUNTAIN STATES • • Musk Thistle is also found throughout the ranch in scattered patches. Most patches are less than 50 feet in diameter with moderate densities. The largest infestations are close to the old homestead with a couple patches up to about 3 acres. Scotch Thistle is found in less than 12 patches with patches ranging from 10 to 100 feet. The two largest patches are found in the dry land fields south of County Road 115 Houndstounge is found scattered throughout the ranch. There are single plants along the roadsides and patches found close to areas of oak brush along the edges of clearings. Most patches are less than 30 feet in diameter with 5-50 plants. Burdock is found most heavily along the edge of one field on the south side of county road 115. There is also a 50 feet long patch on the north side of county road 115 just east of the ranch house. Other than these patches it is found is small numbers in wet areas around the ranch. Absinth Wormwood was found as a single plant at 39 31.212' W, 107 14.996' N. Dalmatian Toadflax was found as a single plant at 39 29.561' W, 107 13.532' N. Russian Knapweed was found in one patch about 30' by 75' at 39 30.180W' 107 14.022' N. Diffuse Knapweed was found in one patch about a half acre in size. The patch has very heavy density in the center and scattered plants around the edges. The patch is found under the power line at the northwest end where it Y's into two lines. Leafy Spurge was found in the same patch as the diffuse knapweed. The Leafy Spurge is limited to a smaller area in the center of the patch of Knapweed. The estimated population is 30-50 plants. Yellow Toadflax was found in the upper parcel in one patch by the old corrals. Spring Valley Ranch has many species of noxious weeds present and it will be very important to manage all of the current infestations as well as monitor the newly developed and revegetated areas to prevent new infestations from establishing and let the new vegetation establish a competitive cover. Outdoor Services recommends two herbicide applications per year on an annual basis for the duration of the project. The first application would be in June and the second in September. Herbicides for the June application would be Milestone at 6 oz per acre and Vanquish at 1pt per acre. Herbicides used in the fall application may include combinations of Tordon, Telar, Escort, Milestone, Vanquish or 2-4D depending upon areas and weeds to be treated. • 7950 County Rd 309 Rif1 CO 81650 BBB 970-625-1002 970-618-2800 MEMBER MOUNTAIN STATES occape Cur' `r OttAcny-R-0 CoCoradoe \\ 7� 970-625-1002 � 5�'��1 970-618-2800 Spring Valley Ranch Weed Spraying Budget Outdoor Services recommends two herbicide applications per year. The first application would be in June and the second in September. Herbicides for the June application would be Milestone at 6 oz per acre and Vanquish at 1pt per acre. Herbicides used in the fall application may include combinations of Tordon, Telar, Escort, Milestone, Vanquish or 2-4D depending upon areas to be treated and results of the spring application. The biggest challenge in weed control in developments is to keep the existing weeds from invading and taking over all of the new disturbed areas. Spring Valley Ranch has many species of noxious weeds on site. These weeds are more prevalent in the areas that have already been disturbed than in the non disturbed areas. Spring Valley Ranch has had limited development to this point. Weed control for 2008 should concentrate on the areas that have been disturbed in the past few years. The reseeded areas south of County Road 115 will need spot sprayed. The hayfields on the north side of 115 road have larger areas infested and will need boom sprayed. The boom spray should be limited to the spring application. During the fall application they should just need to be spot sprayed. The roadside areas will need to be sprayed. This will prevent the weeds from invading the brush areas and stop the travel of weed seeds from the vehicle traffic on the roads. The weed control program should be started for the entire ranch to start diminishing the current infestations so that when the other areas are developed there will be fewer new infestations to deal with. Outdoor Services will work on a time and material basis for Spring Valley Ranch. I would recommend a budget of $30,000 for 2008. The weed control would start in the areas that will be developed first and then branch out to the other areas. Treatment in subsequent years may vary in cost depending upon how fast the development process proceeds. The spring application would be about $20,000 and the fall about $10,000. Rates for 2008 will be $120 per man hour for labor and equipment plus chemical. Outdoor Services recommends a small scale application this fall with a cost of about $1500-$2000. This would need to be completed in the first two weeks of October. The areas I would recommend treating this fall would be the wetlands south of County Road 115 and the Diffuse Knapweed and Leafy Spurge patch, the single Absinth Wormwood and the single Dalmatian Toadflax. • 7950 County Q[309 Qifle CO 81650 BBB MEMBER MOUNTAIN STATES cape Cu • Outdaar CoCorarl° , Serice& a 970-625-1002 eed Spra�i'V 970-618-2800 AW Absinth Wormwood B Burdock CT Canada Thistle DK Diffuse Knapweed DT Daimation Toadflax PT Plumeless Thistle HT Houndstongue LS Leafy Spurge • MT Musk Thistle RK Russian Knapweed ST Scotch Thistle YT Yellow Toadflax All Weed Codes 7950 County 54309 2Z,ifi CO 81650 BBB MEMD&R MOUNTAIN STATES • • EROSION CONTROL, STABILIZATION AND REVEGETATION 1. SCOPE The work consists of the construction of erosion control, stabilization and revegetation appurtenances and the performance of best management practices before, during and after construction of the development project to prevent damage to other resources by sediment from soil erosion and to return the constructed cut/fill slopes to an aesthetically pleasing, natural and native condition. The work includes the furnishing of all labor, equipment, materials, excavation, installation of materials and site clean-up. 2. MATERIALS The type and estimated quantities of materials to be used in the work shall be indicated on the design drawings and/or described within these specifications. The following specifications shall apply for planting materials proposed for the Project: The following plants and planting recommendations shall be used as a guideline for the restoration of disturbed lands or the revegetation of developed lands. If the specific plant materials are not available, the plant species may be substituted with currently available planting materials that resemble the unavailable or native species under the direction of the Engineer. DRYLAND - Non -irrigated Common name Western Wheatgrass Thickspike Wheatgrass Streambank Wheatgrass Slender Wheatgrass Pubescent Wheatgrass Canby Bluegrass Green Needlegrass Indian Ricegrass DRYLAND - Irrigated Common name Tall Fescue (Turf Type) Basin Wildrye Kentucky Bluegrass STREAMBANK Common name Muttongrass Bluejoint Reedgrass Western Wheatgrass Bunchgrass Rushes Genus/species Rate Agropyron smithii Agropyron dasystachym Agropyron riparium Agropyron trachycaulum Agropyron trichophorum Poa canbyi Stipa viridula Oryzopsis hymenoides Genus/species Festuca arundinacea Elymus cinereus Poa Pratensis Genus/species Poa fendleriana Calamagrostis canadensis Agropyron smithii Sporobolus airoides Juncus balticus 8 lbs./Acre 6 lbs./Acre 6 lbs./Acre 6 lbs./Acre 4 lbs./Acre 3 lbs./Acre 5 lbs./Acre 3 lbs./Acre Rate 3 lbs./1,000 SF 1 Ib./1,000 SF 1 Ib./1,000 SF Rate 3 lbs./Acre 2 lbs./Acre 2 lbs./Acre 2 lbs./Acre 1 Ib./Acre WETLANDS Rushes Juncus balticus 3 lbs./Acre Scirpus americanus 3 lbs./Acre Sedge Carex, spp 3 lbs./Acre Spikesedge Eleocharis macrostachya 2 lbs./Acre Cottongrass Eriophorum angustifolium 2 lbs./Acre Marsh Marigold Caltha leptosepala .5 lbs./Acre Lousewort Pedicularis groenlandica .5 Ib./Acre Rate refers to Pure Live Seed (PLS) and corresponds to USDA -SCS recommendations, Colorado Agronomy Note No. 61, March 16, 1981. 3. CERTIFICATION BY MANUFACTURER When requested by the Engineer, the Contractor shall furnish certification by the manufacturer(s) of the erosion control materials to be furnished on this project, certifying that they comply with the goals of the project and applicable specifications. All seed tags and containers shall be delivered to the Engineer upon request and planting material identification labels shall remain legible and attached to the individual plant until the Engineer authorizes removal. 4. TEMPORARY EROSION CONTROL During construction activities, efforts shall be made to minimize disturbed soil movement by both wind and water. Should wind erosion become an evident problem, a water truck shall be required to maintain a moist condition in the construction area. Existing natural vegetation shall be protected where possible. Straw bales or fabric silt fences shall be installed at critical points where potential water erosion with resultant soil movement off the site exists. The Engineer shall direct placement of temporary erosion control measures on a site specific basis as needed and as phase development of the project occurs. 5. PERMANENT EROSION CONTROL Slopes shall be constructed per project drawings and specifications. Erosion control and revegetation procedures shall be implemented according to the angle of repose of the finish grade slope. Existing natural vegetation shall be protected where possible. • • • • 6. TOPSOIL Pre -Construction; Prior to any excavation within the project, Contractor shall provide a composite soil sample for each major plant community to an appropriate testing facility for evaluation. The soil evaluation shall consist of the following parameters: 1. Soil Texture 2. Sodium Absorption Ratio (SAR) 3. Electroconductivity 4. pH 5. Organic Content 6. Nutrient content Nitrogen Phosphorous Potassium 7. Micronutrient needs During Construction; All available topsoil within the areas proposed for grading shall be stripped to a depth suitable for reuse (as determined from the pre -construction soil tests) and stockpiled for revegetation. Large, woody plant material shall be removed (grubbed) prior to topsoil stripping to minimize the amount of unsuitable materials in the topsoil, however a lesser amount of these materials is desirable since these materials contain native seed or plant parts (rhizomes, roots and sprigs) that will grow and aid in establishing plant cover. The woody plant material shall be either chipped and spread over the final surface as mulch, or removed from the site and properly disposed. Post -Construction, Revegetation; Prior to the use of the stockpiled topsoil, the Contractor shall collect and provide a composite topsoil sample to an appropriate testing facility for evaluation. The results of the evaluation shall indicate the required soil amendments to bring the topsoil to the acceptable chemical and organic quality desired for the successful establishment and optimum growing media standards for the specific revegetation treatments. The results of the soil evaluation shall be distributed to the Owner and Engineer upon completion of the evaluation. Additional topsoil required to complete the proposed erosion control and revegetation treatments shall be imported, stockpiled, tested and amended as needed to conform to the desired amounts and quality. 7. REVEGETATION PROCEDURE All proposed plantings (trees, shrubs and ornamental plants) shall be installed after topsoil placement and seedbed preparation and prior to seeding of the completed cut/fill slopes. Shrubs shall be spaced 3 to 4 feet apart in a random arrangement or grouping rather than in rows. Planting holes shall be dug perpendicular to the face of the slope and shall be large enough to accept the plant without bending or curling the roots. Remove containers before planting and pack firmly to eliminate air pockets. If soil moisture is deficient, water the plants immediately after transplanting. Protection of the plantings from wildlife foraging shall be accomplished by installing individual or group forage protection/exclusion devices or by the use of boundary electric (two -wire) fencing. Said protection appurtenances and methods shall be reviewed and approved by the Engineer prior to installation. For Repose Angle steeper than 2:1; Scarification shall be required on all slopes designated for topsoil application. Scarify hard surfaces to provide at least 6- inches of loosened material. Scarification operations shall be performed across the slope, not up and down. Where rock outcrops prevent scarification, additional rocks shall be worked into the slope and combined with cluster plantings of shrubs. Topsoil shall be applied at an average depth of six (6) inches (18.6 cubic yards per 1000 square feet). Surfaces shall be smoothed following topsoil application and all rocks (> 6 - inch diameter), debris and unsuitable materials shall be removed. Fertilizer (slow release nitrogen) and soil amendments should be applied in the final stages of seedbed preparation and worked into the soil surface prior to seeding. Application rates shall be determined by the site specific soil tests and/or as specified by the Engineer. Minimum application rates shall be approximately 40 to 80 lbs available Nitrogen and 50 to 100 lbs available P2O5 per acre. (Install Live Plantings) Seed mixtures shall be broadcast seeded by the use of hand held canister seeder or other approved mechanical means using the specified seed mixture and rate. Immediately following seeding, the area shall be raked to assure that the seed is buried to a depth of'/ inch. Seeded areas (Dryland Mix) shall be mulched with an application of Soil Guard, Bonded Fiber Matrix (Weyerhaeuser) by a certified applicator according to manufacturers instructions, utilizing standard hydraulic mulching equipment at a rate of 3,000 pounds per acre. The applicator shall not apply the product in advance of rainfall, such that the bonded fiber matrix has an opportunity to cure for a minimum of 24 hours after installation. For Repose Angle 2:1 or flatter; Scarification shall be required on all slopes designated for topsoil application. Scarify hard surfaces to provide at least 6- inches of loosened material. Scarification operations shall be performed across the slope, not up and down. Where rock outcrops prevent scarification, additional rocks shall be worked into the slope and combined with cluster plantings of shrubs. Surfaces shall be smoothed and topsoil shall be applied at an average depth of six (6) inches (18.6 cubic yards per 1000 square feet). Finished surface shall be smoothed following topsoil application and all rocks (> 6 -inch diameter), debris and unsuitable materials shall be removed. Fertilizer (slow release nitrogen) and soil amendments should be applied in the final stages of seedbed preparation and worked into the soil surface prior to seeding. Application rates shall be determined by the site specific soil tests and/or as specified by the Town of Gypsum. Minimum application rates shall be approximately 40 to 80 lbs available Nitrogen and 50 to 100 lbs available P2O5 per acre. • • • • • • (Install Live Plantings) Seed mixtures shall be broadcast seeded by the use of hand held canister seeder or other approved mechanical means using the specified seed mixture and rate. Immediately following seeding, the area shall be raked to assure that the seed is buried to a depth of'/ inch. Seeded areas (Dryland Mix) shall be Hydromulched with an application of Silva -Fiber Plus, wood fiber mulch and tackifier or Engineer approved equal, using only designated materials per manufacturers recommendations over the seeded area at a rate of 2000 lbs/acre. Some cut or fill areas may require an alternative treatment once the initial construction practices (Grading) are completed to assure success in erosion control and revegetation. 8. ALTERNATIVE PROTECTION Site excavation may produce slopes which shall not be conducive to the above erosion control and revegetation practices due to rock outcrops or other impervious subsurface materials. In this case, rock aggregate which is aesthetically pleasing to view, Crib Retaining Walls or stacked boulder walls may be substituted for topsoil and planting in limited areas. Revegetation of the rock slopes shall be performed by creating pockets of soil that provide adequate rooting depth. Treatment of bare root plantings with a polyacrylamide slurry to hold the moisture around the roots shall be performed at the direction of the Engineer. 9. MAINTENANCE Successful plant establishment is obtained by the following principles: a. Provide for adequate water control of the area; b. Prepare a seedbed or site that will provide soil stability during plant establishment; c. Use proper planting techniques at the proper season; d. Mulch to protect the soil and provide a better environment for plant growth; e. Fertilize and apply soil amendments as needed; and f. Protection from wildlife (Deer and Elk, etc.) foraging. Artificial irrigation shall be provided and encouraged during the first and subsequent growing seasons, indefinitely, to assure establishment and continued success of the revegetated and planted areas. Apply irrigation water in a fine spray and at a rate that does not cause runoff and erosion. Irrigation system design and details shall be provided within the applicable project drawings and specifications. 10. SUCCESS AND APPROVAL OF REVEGETATION WORK The results of the work of seeding and mulching and other revegetation and landscape work can only be evaluated after a sufficient period of time has elapsed for germination to occur or for live plants to root and become established in the new environment. This period of time is normally a minimum of one growing season and may be as long as two years. The Engineer will evaluate the work after, what is in their best judgement, a reasonable period of vegetation establishment and will approve the work if, in their best judgement, functional success has been achieved. Deficiencies in functional success shall be corrected. 11. MEASUREMENT AND PAYMENT Measurement shall be made by totaling the square yards of area revegetated according to the plans and specifications.. The accepted quantities of revegetated area will be paid for at the contract unit price per square yard. All work incidental to the Work of revegetation shall be included in the unit price. The term "accepted quantities" shall mean only those quantities necessary to revegetate the areas disturbed by the construction process as defined in the plans and specifications, and/or authorized and modified by the Engineer in the field. Any additional quantity used in the work which is not in any way authorized, and/or is the result of waste, or disturbing of greater areas than are designed, specified or authorized, shall not be paid for. • • EXISTING CONDITIONS MAP with WEED INVENTORY AREAS SPRING VALLEY RANCH P.U.D. 600 LAND PLANNER CIVIL ENGINEERING: GAM BA & ASSOCIATES, INC. CONSULTING ENGINEERS & LAND SURVEYORS 970/945-2550 WWW .GA MBAENGINEERING.COM 113 NINTH ST., STE. 214 P.O. SOX 1456 GLENWOOD SPRINGS, CO 81602 DATE: October 15, 2007 600 1200 GRAPHIC SCALE IN FEET 1 INCH = 600 FEET CONTOUR INTERVAL = 10FEET 1800 /1( f 1111111re It Wif 4 re. itt'r "111 IT"'" TrAr / C Ate a0 1 I # 4‘S143. rwr w fly" irc ks-n-i,‘10 -tit"; t 11'44 iist (4 ow,t1.1 '40t, d" LEGEND AW B CT DK DT PT HT LS MT RK ST YT EXISTING WETLANDS WEED INVENTORY AREA EXISTING OVERHEAD POWER EXISTING FENCING EXISTING UNPAVED ROADS EXISTING TRAILS SPOT ELEVATIONS WEED AREAS & TYPES: Absinth Wormwood Burdock Canada Thistle Diffuse Knapweed Dalmation Toadflax Plumeless thistle Houndstongue Leafy Spurge Musk thistle Russian Knapweed Scotch thistle Yellow Toadflax MT CT psi • • - /�%/'_•I\ • ��'. VantresawavatI Aar