Moonlight Tower #31 - RIP and More Multi-cache

On May 6th in the year of 1895, the Mayor of Austin Texas announced that 31 lighting towers were turned on to provide illumination to the growing city.

These amazing tower rose to over 156 feet in a city were the tallest building rose only two stories. Each one threw a bright light over a Victorian age city, where the only light before were gas street lights.

From a declaration of a new era at the beginning of one century, two centuries later (yup, the towers now span three centuries) our Moonlight Towers (or Moon Towers) have received local, state and national historical designations through our own desire to preserve and protect those things that make Austin's personality.

Keep Austin Weird!

15 currently remain standing, with an additional two in storage awaiting construction to complete in their former locations.

(See the “Party at the Moon Towers” cache series by djdiggla and ogshowtime.)

Alas, this is not about these 15 remaining towers.

This cache series is to lead you around Austin to stand where the other 16 once stood, and in addition, those spots where towers were moved to as the city changed. As you do this cache, and if you are a native Austinite, transplant or visitor, you can see how the capital city has expanded over the last 115 years

Moonlight Tower #31 was one of the original locations of the 1895 lighting tower project. This tower sat on the spot that made it all happen. The City of Austin exchanged a narrow guage railroad (that was used to build the McDonald Dam) plus the rather large sum of $70,000 for the towers.

When you find the Clue, look to your right. You will see a a cell tower to the North West on the horizon. This tower, locked behind LCRA gates, stands almost exactly where the tower was. Then, look down to the northern water's edge and you will see a very large piece of granite blocks, still cemented together. These are the actual remains of the dam that was torn apart at 11:20am on April 7 1900, sending a wall of water into downtown Austin, leveling homes, and killing 47 persons.
She appears to have made it through the floods, but eventually became lost in history. She was the first tower to be taken down (by 1916).

NOW, on to the ACTUAL CACHE:

Read the historical marker at the coordinates

You can check your answers for this puzzle on Geochecker.com.

Lowest Year Listed:	ABCD
Highest Year Listed:	EFGH
Number of Years Listed:	I
Number of letter in Rank:	J
Result of H minus D:	K
Result of J minus I:	L
Result of G minus B:	M
Number of Listed Years in 20th Century:	N
North: DM AK.LCH West: MFJ NI.EKA

This is will take you to somewhere rather different for Austin.
The site of the first murder of the Servant Girl Annihilator.

You will find some who reference these serial killings as one of the reasons the Moonlight Towers were purchased and installed. What I can tell you is that the spree started on Dec 30, 1884 when Mollie Smith was killed with an axe by an unknown person (someone that was bold enough to bludgeon her husband in bed before dragging her outside). The terror ended in 1885.
The process for the towers started over 5 years later. I leave that to you to ponder if there is any connection.

Tread lightly when looking for this cache, as there are muggles about, and who knows, maybe poor Mollie.

THIS IS A TWO PART CACHE
The coordinates listed will get you to the clues to find the final one. Oh, it is a special designed cache, so bring a pen!