"East NPS Ops" has been removed, but for information... there wasn't any request (that I saw in the submissions page) asking for it to be deleted. Requesting it be deleted in a thread isn't the way to get it done.
I recall making a submission to eliminate the listing some years back. I was told the listing was accurate and that the source knew the listing to be accurate. It has been some years since I retired so it is possible they made some changes, but the association with Yosemite has not. The need to communicate with Yosemite and vice versa does not exist. They were a unit of Sequoia-Kings until recently and prior to 1994 the Sierra Crest sub-district ranger was stationed in Bishop year round. That ranger assisted DPP on a frequent basis.
There wasn't anything set up for radio contact with Sequoia Kings or Yosemite.Dispatching services are provided by the Owens Valley Interagency Communication Center ("Inyo"). DPP is not an exclusive jurisdiction as KNP and YNP are. DPP is a concurrent jurisdiction with Madera County, however, in this case Mono County, and due to distance, the Mammoth PD provided LE assistance, Mono County provided EMS, and Mono County provided SAR. DPP has no fire apparatus and very few minimally trained fire fighters so the park was in the direct protection area of the Inyo NF.
There is a long standing relationship with Death Valley NP because DPP's off season was winter and DVP's was summer. Some personnel worked at one park and then the other because of this. These two parks also appeared before the same federal magistrate in Bishop so DVP assisted DPP for some law enforcement cases.
The Supervisory Park Ranger (most recently changed to a full park superintendent) gave me the copies of the programs for their Kings and the Midland 80 Channel base station when I worked for the Forest Service. I used the base on some occasions. In the case of the latter I don't think they used more than 20 frequencies as DPP sits in a deep valley surrounded by high ridges. It is a cherry stem in the Ansel Adams Wilderness so their aren't any repeaters on those ridges except for the summit of Mammoth Mountain, located outside wilderness, with only a Forest Service and Mammoth PD repeater available on VHF. The ability to use a lot of frequencies does not exist there. The Midland base was a huge radio and fully met the definition of a "boat anchor."
We worked together a great deal, especially myself. We (their personnel and myself) worked on minor law enforcement incidents , where two officers were needed, the annual valley road closings/openings, shuttle bus management, parking control, entrance station operations, maintenance issues, avalanche evaluation, etc. Due to my job description I was the primary liaison between the park and the forest, at least on the face to face, field level. There wasn't any friction between the agencies at all and what was theirs was ours and vice versa. Working with DPP when I was on the Inyo and YNP when I was on the Toiyabe on the Bridgeport Ranger District were two of the highlights of my career. I was able to help them and they me.
When I hiked and horse backed on the Toiyabe NF some trips required looping into Yosemite and out again. My only radio contact was the park both on the forest and the park in many areas. I knew and still know the radio system of Yosemite. As far as I know Hoffman was the first repeater in the park with Wawona added next and Crane Flat later. Now they have Valley Ranger District repeaters on Sentinel and Turtleback Dome.