Frequency Analysis Mystery Cache

The cache is not at the listed coordinates, but the bridge is visible from the final location. There's parking nearby and it's a short walk from central station.

PGN BFTW RNFSWNAA VO AKLAPTPKPTVW NWQJZHPTVW TA TPA CKIWNJFLTITPZ PV FPPFQS LZ OJNXKNWQZ FWFIZATA PGN AKLAPTPKPTVW QTHGNJ TA PGN BVAP QVBBVW RFZ VO NWQJZHPTWU PNDP FWE RVJSA LZ BFSTWU NFQG INPPNJ NXKFI PV FWVPGNJ VWN OVJ NDFBHIN NWQJZHPNE F QVKIE LN KANE OVJ F HIFTW PNDP Q FWE NWQJZHPNE S QVKIE LN HIFTW PNDP D PGN NWQJZHPTVW VO PGN GTWPA VW PGTA RNLATPN TA FW NDFBHIN VO F AKLAPTPKPTVW QTHGNJ RGNJN NFQG INPPNJ TA ARFHHNE OVJ PGN VWN PGTJPNNW INPPNJA IFPNJ TW PGN FIHGFLNP

OJNXKNWQZ FWFIZATA RVJSA LZ IVVSTWU OVJ HFPPNJWA TW PGN NWQJZHPNE PNDP TW FII IFWUKFUNA AVBN INPPNJA FWE UJVKHA VO INPPNJA VQQKJ BVJN VOPNW PGFW VPGNJA FWE RN QFW KAN PGTA PV BFSN FAAKBHPTVWA FLVKP PGN AKLAPTPKPTVWA PGFP GFCN LNNW BFEN

PGN QFQGN TA GTEENW FP WVJPG OTOPZ OVKJ ENUJNNA OTOPZ NTUGP HVTWP PRV WTWN OVKJ FWE RNAP VWN ENUJNN PGTJPZ ATD HVTWP OTCN PGJNN ATD

OVJ NDFBHIN TW NWUITAG N TA PGN BVAP QVBBVW INPPNJ FWE P TA WNDP, AV TO F TA PGN BVAP QVBBVW INPPNJ TW PGN NWQJZHPNE PNDP RN QFW APFJP RTPG PGN FAAKBHPTVW PGFP F GFA LNNW AKLAPTPKPNE OVJ N PGN BVAP QVBBVW HFTJ VO INPPNJA TA PG RGTQG BFZ FIAV HJVCN KANOKI

TUWVJN PGN QVVJETWFPNA FLVCN PGNZ FJN VWIZ PGNJN PV PJFH IFMZ HNVHIN RGV EV WVP ENQVEN PGN RGVIN BNAAFUN PGN JNFI QVVJETWFPNA FJN WVJPG OTOPZ OVKJ ENUJNNA OTOPZ ANCNW HVTWP WTWN MNJV ATD RNAP VWN ENUJNN PGTJPZ ATD HVTWP WTWN VWN WTWN