Specifications include, but are not limited to: The Wisconsin Department of Natural Resources (hereinafter “DNR”) is soliciting bids to apply herbicide by helicopter or unmanned aerial vehicle (i.e. drone) to plots of invasive cattail, phragmites and aspen across 9 DNR-managed properties across Wisconsin during time periods that overlap August and September of 2022. The intent of this project is to suppress the spread and dominance of these species within wetlands for the purpose of revitalizing native plant communities, improving habitat for waterfowl and other species of wildlife, creating open water and improving access for people that recreate in and manage these wetlands. DNR has contracted such work in the past in Wisconsin and have seen positive results. The job contains a total of 70 polygons to be sprayed across these 9 property complexes, totaling approximately 605 acres. Expenses for these polygons will be covered under sources of state seg and federal funding.; The aircraft will be required to have a GPS system on board to record spray swaths, position, and boom on and off times and location.; If local wind patterns are known they should be taken into account.; Avoid spray drift impacting non-target sites by taking the following steps:; When treating next to sensitive areas, spray in the morning if possible. The specific time will need to be determined by real-time weather monitoring.; Maintain boom pressure at less than 40psi., or per label instruction.; Monitor spray pressure during flight, since changes in pressure can change the application rates and may change the drop size.; Use nozzles designed for medium to coarse droplet size (240 to 400 microns), or as specified per label instruction.; Use Imazapyr and methylated seed oil as a surfactant to help maintain large droplet size.; Check nozzles frequently for malfunctions.; If possible, begin the first swath at least 300 feet from any sensitive area (e.g. roads, facilities). The polygons targeted should avoid most sensitive areas.; Monitor and record weather in the area. The weather should be monitored in real time for operational control and to help with the post-spray analysis.; Strive for winds from 3 to 6 miles per hour or per label instruction.; Do not treat if rain is predicted within one hour or if winds are over 12 miles per hour.; The property manager will be present when aerial spraying is occurring. The property manager has the right to halt spraying due to weather.