A06_Detailed_Specifications.docx

DETAILED SPECIFICATIONS

HERBICIDE APPLICATION

2025 Owyhee Desert Herbicide Weed Treatment

1. Target Species: Russian thistle, Scotch thistle, hoary cress Additional noxious weed species found within the designated contract boundary, and susceptible to chemical intended for use, will also be treated.

2. Treatment Area: A total of 4247 acres including: 4220 acres of upland where no water will be present and therefore will require the terrestrial tank mix, and 27 acres that have the potential for water to be present and will require the use of the water’s edge tank mix. Treatment areas vary in the density of noxious weeds that are within the polygon. Actual weed treatments will be less than that of the treatment area itself.

3. Location of Work Site: Project area is located approximately 18 miles Northwest of Tuscarora. The Legal Description for the treatment area is: T43N R50E and T42N R50E. See Attached Location Maps.

Access to Work Site: Public or private access roads damaged by the Contractor shall be restored, at the Contractor’s expense, to the same condition they were in at the commencement of work.

4. Approximate Performance Period: Period of performance is estimated, and timing of treatments will need to be flexible to maximize the effects on target weed species. The anticipated treatment window for this project is June 2nd to July 18th. The Contractor must be available during that period.

5. Requirements of Equipment to be supplied by the Contractor: Sufficient to meet specifications of the contract.

6. Loading Facilities: Use of any loading area on federal or private land, shall be arranged by and at the discretion and risk of the contractor.

7. Work Crew Requirements: Work crew for handling and mixing of chemical and loading equipment shall be furnished by the Contractor.

8. Requirements of Chemical to be supplied by the Contractor: Herbicide, surfactant, and dye shall be used and selected from the attached lists of Approved Herbicide Formulations and Approved Adjuvants for use on BLM land. Colorant/dye must be visible for 3 days after application.

9. Kind of Chemical: 2,4-D + Chlorsulfuron + non-ionic surfactant + dye AND up to water’s edge approved 2,4-D + up to water’s edge approved non-ionic surfactant+ dye

Contractor must provide a list of chemicals intended for use with their bid package.

10. Rate of Application:

· Terrestrial Tank Mix: 2,4-D at 32 ounces/acre (0.95 lb. ae/acre) + Chlorsulfuron at 1 ounces/acre (0.0375lb AI/acre) + non-ionic surfactant (Rate as specified on label and compatible with herbicide) + dye.

· Water’s Edge Tank Mix: Up to water’s edge approved 2,4-D (Alligare 2,4-D or equivalent) at 64 ounces/acre (1.9 lb. ae/acre) + up to water’s edge approved non-ionic surfactant (Rate as specified on label and compatible with herbicide) + dye.

11. Remarks and Other Requirements: Apply the spray solution in properly maintained and calibrated equipment capable of delivering the desired volume. Controlling drift is the responsibility of the Applicator. If there is potential for harm to non-target native species due to broadcast spraying certain areas the contractor MUST spot spray the target species in those given areas.

The Owyhee Desert herbicide weed treatment terrain varies from relatively flat 2-5% slope to rolling hills ranging from 10-20% slope. Soils are a shallow loam. Elevation ranges from 5300 to 5600 feet. Vegetation consists of dense patches of Wyoming big sagebrush, Thurber’s needlegrass, bluebunch wheatgrass, Sandberg’s bluegrass, Indian paintbrush, globemallow, and phlox. Other alkaline tolerant shrubs like rubber rabbitbrush, fourwing saltbush, and spiny hopsage can also be found in the plant community in small, isolated patches.

For areas where water is present during the time of application, the buffers for non-aquatically formulated herbicides will be maintained at 10 feet for application by handgun and 25 feet for application with boom equipment. Spraying up to the water’s edge (within the buffer) will require use of aquatic formulated herbicide and surfactant.