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Impound Basin 24 - A Kick in the Grass Mystery Cache

Hidden : 8/4/2010
Difficulty:
2 out of 5
Terrain:
2.5 out of 5

Size: Size:   regular (regular)

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Geocache Description:

There is nothing at the posted coordinates. It is just a spot next to the parking lot. .
The puzzle will take you on a tour of Bob Case park and involve a little bit of walking through some tall grass and thorny things, where I picked up a few ticks, so be sure to use bug repellent and check yourself after. I have not encountered poison ivy, but it would not surprise me if some was there.

You are standing in the reclaimed remains of Impounding Basin No. 24. For a hundred years, barges carried coal from upstate to Philadelphia along the Schuylkill River and the Schuylkill Canal, which was a series of locks and dams along this stretch of the river. Although you cannot see it from here, the river is about 500 meters north of here (no, you cannot walk to it, there is a railroad in the way). By the 1950s the river bed was clogged with silt and dust washed out from the coal mining operations upstream and from the barges. The river was polluted and not navigable. The Army Corp of Engineers began dredging the river and built a series of impounding basins to hold and drain the recovered muck off from the bottom of the river. Growing up in this area, we referred to these sites as Silt Basins. They were a favorite destination for anyone with a mini-bike or a Jeep.
In the last decade, many of these basins have been mined. The coal dust sold to charcoal companies. The construction companies working on the expansion of the Turnpike and Expressway needed a place to dump tons of dirt and they worked out a deal with the township to dump the excavated dirt into these empty basins, which at this point were just big ugly holes. In return for a free place to dump the dirt, the excavating companies filled the basins, then build sports fields and playgrounds on them. This is the most recent park created this way. It provides practice fields for the local youth soccer and lacrosse clubs. Another larger park, Heuser Park, is located about a half mile west of here. That one has fields for football, baseball, softball, t-ball, soccer and lacrosse. It also has a children's; playground and a Geocache (GC1HAW9). A walking trail connects the two parks.

To find this cache, walk in a northerly direction from the parking area along the fence line. You will come to a paved path (which eventually winds through a housing development to Heuser park). The path is clearly visible on Google maps photos. There is a fence on both sides of the paved path as it descends to the bottom of the old basin. As you go down the path, count and make note of the number of fence posts on the left side (facing downhill) and on the right side.
There are more than 10, but less than 50 on each side.

Left side (L) = ____ L/1000 = A
Right side (R) = ____ R/1000 = B

You will use these numbers to calculate the final. Walking along this path, you can get a feel for how deep this basis once was. The western boundary of the basin would have been around the road where you drove in. The berms marking the southern and eastern edges are still clearly visible in the treeline surrounding the soccer fields.

Stealth will be required, especially if there is a game or practice underway on the field as you will be visible to players and spectators. We don't want to freak them out or expose the cache to muggles.
The final location can be found by using the reference coordinates and the numbers calculated above.
This calculation will give the final
40N 6.795 + 2B
75W 23.044 - 3A
The cache is a regular container with GEOCACHE written on the side, located in just inside the tree line. A little bushwacking will be required for the last 25 feet or so. There is no need to climb over any berms.
I found that my GPSR gets a bit fuzzy when under tree cover, but it always got me within a few feet of the final.

Initially the cache contains a logbook, pencils, a couple water pistols, a Phillies dogtag/bottle opener, some pencil top toys and a big snake to guard it all. There is also a Wawa hoagie for the first to find.

Additional Hints (Decrypt)

Gurer ner zber srapr cbfgf ba gur yrsg fvqr bs gur cngu guna ba gur evtug fvqr. Gur pnpur vf oruvaq n fznyy gerr. Gel gb xrrc vg uvqqra.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)