SCIGN Site Evaluation Report
Report status
complete
in progress
Site Name
Site Code
blank
Elysian Park - Radio Hill
PKRD
Organization City of Los Angeles Parks & Recreation
ECI Completion
Date
Permit StatusSigned
EvaluatorsKDC, TKG
SCIGN Board Acceptance
Revision #
Yes
No
Reason for Revision
Date
none
Revisions are underlined
ECI Site Evaluation Summary
ECI Evaluation adequate
accept
ECI Recommendation
Recommended
Percussion
Drill Rig
Sky view fair
Estimated Remediation/Additional $1500-2000
Cost
Basis for Rejectionnone
or Further Assessment
Recommend Moving Site
Recommended Site Relocation Distance
no
None
Comments
Site is on Radio Hill, in the southeastern area of the Elysian Park. Power is available, but freewave is required.
Site location is a compromise with a local citizen activist group (“Citizens to Save Elysian Park”) that opposes development of
any kind within the park boundaries. Site is within 20 feet of a large metal antenna tower (~175 feet high) that is located
northeast and east from the GPS antenna. Sky view is good to the south and adequate to the north.
Additional costs reflect the need for a security fence around the GPS monument, and construction of a nature trail kiosk
requested by the host and local citizens group.
A percussion drill rig is recommended for this site.
Site Location
Street Address
Amador Street
City
Los Angeles
Zip Code
90012
Latitude
34.07161
Thomas
Brothers Map
634 H1
Primary Contact Information
County
Longitude -118.23271
Delorme 93 D5
UTM North
Los Angeles
UTM East
7.5' QuadrangleLos Angeles
(not to be web posted w/o consent of individual)
Name
Jay Sloan
Secondary Contact Information
Title
Real Estate Section - City of Los Angeles Parks and
2) Secondary contact for access to Radio Hill
Park is Peggy or Martin (last names unknown)
also with the City of LA Parks & Recreation
(213) 485-5054
Address
City
Phone #
Zip
213-485-6143
Fax
e-mail
[email protected]
Reception Excellent
3) Steve Klippel (Jay Sloan’s supervisor), District
General Manager of Parks & Recreation
(213) 45-5501
Site Geology and Physical Attributes
Present
land use
Level pad on top of Radio Hill where several radio towers are located.
Earth Materials
Age
Type
non-marine
Miocene
Earth Materials
Comments
PKRD
Artificial Fill
none
yes
Lithology
sandstone
maybe
-The site is underlain by 0 to 3 feet of artificial fill placed to form the level building pad for the building and antennas.
-Bedrock unit below the fill is sandstone of the Tertiary-age Puente Formation. The sandstone is well-bedded and
medium- to coarse-grained. Structurally, the site is located on the south flank of the N60W-trending Elysian Park
anticline.
Oil wells w/in 2km
yes
Subsidence
none
yes
maybe
Precultural
surface water
none
yes
maybe
Local Physical
Attributes
no
Water wells w/in 2km
Declination 13
yes
no
Landslides
none
yes
Ground slope essentially level
Local drainage
good
fair
poor
Liquefaction is not a concern at this bedrock site. Subsidence as a result of groundwater or oil extraction has
not been reported in this area, even though two active oil fields (Union Station, and Los Angeles Downtown)
are located within 2 km of the site. A third oil field, Boyle Heights, is also located within 2 km of the site, but it
is abandoned.
Ground water is not expected to be encountered in the borings drilled for the GPS monument.
Some amplification of seismic energy is expected on this topographic high.
Additional
geologic
information
One landslide has been documented on the steeper northern side of Elysian Park. The original slide was
probably created by the cutting action of the Los Angeles River; the slide occurred even though bedding dips
into slope. The slide was reactivated when RIverside Drive was graded. No landslides have been mapped in
the GPS site area, however, geomorphic indicators suggest a possibility of landslides in some areas on the
south side of Radio Hill. In this area, the bedding dips steeper than the slope (EW strike and dips to the south
of between 43 and 55 degrees; slope is 25 degrees from horizontal).
Known faults within a 20 mile radius from the Elysian Park GPS site:
Fault
Distance (miles)
Hollywood ................................... 3
Raymond .................................... 3
Elysian Park Thrust ................. .... 4
Verdugo ...................................... 6
Newport-Inglewood ....................... 8
Sierra Madre ............................... 10
Santa Monica .............................. 10
Whittier ...................................... 14
Clamshell-Sawpit ......................... 15
Sierra Madre (San Fernando) ...... .. 15
Malibu Coast ............................... 17
San Gabriel ................................. 17
Northridge ................................... 17
Palos Verdes ......................... ..... 18
San Jose .................................... 20
Sky View and Potential for Interference of Signal
Sky view
fair
Trees
several
Fences
none
yes
Overhead wires
none
yes
Objects >15 deg
Steel antenna,
wooden antenna
poles, house, wires
22
JPEG error #62
Objects above
45 deg
Antennas
Objects above antenna
within 3m
none
Site Horizon
South
Objects >15 deg
none
Squares above
15 deg
0
Objects above
45 deg
none
PKRD
Sky view to the south is good with trees masking sky view to approximately 10 degrees height.
Sky view to the north is hampered by the large communication tower that is located in a range of
N45E to N100E from the GPS site. The building, overhead lines, and a few antenna poles also
affect the north sky view.
Site Horizon
North
Squares above
15 deg
Sky view comments
Objects above
antenna within 3m
none
Access
Directions and map to site
Hoursto be arranged
Thomas Brothers Map
634 H1
PKRD
The Elysian Park site is 34.3 miles from Orange, CA.
-From the CA-91 and CA-55 intersection, proceed west on CA-91 for 7.4 miles and exit at I-5 north.
-Proceed north on I-5 for 22.1 miles and exit at CA-110 South.
-Proceed south on CA-110 for 2.1 miles and exit onto Academy Rd.
-Proceed west on Academy Rd for 0.2 miles.
-Take the second left (south) which is Bouett Street for < 0.1 miles;
-Take the second left (east) which is Amador Street for 0.4 miles (Cross under CA-110).
-The locked gated entrance to Radio Hill is on the south side of Amador Street (located about 0.1
miles east of CA-110).
Site Attributes
Power source
Security
Communication sourcenone
Outside Line
Telephone Carrier
Expected
Future Changes yes
poor
Permanence yes
yes
Radio Capability freewave
unknown
Summary of Reconnaissance
PKRD
unknown
Los Angeles County Parks & Recreation personnel do not know of planned changes/improvements to the antennae towers. They,
along with the Citizens group plan to develop Radio Hill as a park with nature trails, and have requested that SCIGN provide an
explanatory kiosk regarding the GPS site. The site is isolated; a moderate number of homeless people live on Radio Hill.
Power can be obtained from the nearby building; Parks and Recreation prefers electrical boxes/instrumentation to be mounted on the
building. While this is a communication antenna complex, there are no known phone connections in the building. There is also no wate
for drilling purposes available at the site.
This is an environmentally and politically sensitive site.
vegetation when installing the unit.
Contact Jay Sloan before beginning construction.
Site plan
Care should be exercised not to disturb natural
PKR
Site View In North
Site View In South
Site View In West
Site View In East
Site View Out North
Site View Out South
PKR
Site View Out West
Additional Graphics
Site View Out East
Date Received