What We've Learned Since the 1989 Earthquake
Seismologist Karen McNally, PhD
Professor of Earth Sciences, UCSC
RBDA Meeting
• Wednesday, March 10, 7:30 p.m. •
New Multi-Purpose Room, Bonny Doon School
Whole Lotta Shakin' to Go On?
When will the next "Big One" hit? And where? And
how big?
It's been nearly 10 years since the "Loma Prieta" earthquake, which
Bonny Doon largely escaped without damage. Will we be as fortunate the
next time?
These and other questions will be addressed by Professor
Karen McNally of UCSC at the next RBDA meeting, March 10 at 7:30 at Bonny
Doon school. Dr. McNally is an adviser to the governor of California, and
a founder of the Institute of Tectonics and the Charles Richter Seismology
Lab at UCSC. A leading authority on large earthquakes who has done research
in both northern and southern
California and Mexico, Professor McNally was famed for predicting a
7.8 magnitude quake in Mexico. Most recently, her work has focused on our
own San Gregorio Fault. The L..A. Times has dubbed her "the Earthquake
Stalker."
The disastrous 1989 earthquake was a bonanza for
scientists, yielding valuable information about the many faults and cracks
in our area. It also greatly increased public and private willingness to
fund studies that could help predict the probabilities, locations and magnitude
of future quakes.
These studies have yielded interesting and valuable results that could
provide answers (or at least good guesses) to the questions above, answers
which could shake your beliefs in Bonny Doon's invulnerability.
Professor McNally will focus on the faults most likely
to affect Bonny Doon, but she will also talk about the general Santa Cruz
and Monterey-San Francisco bay area's faults. She will also offer tips
on earthquake safety and preparedness. Even though Bonny Doon is largely
underlain by a granite cap that minimizes the shaking, big objects can
move around, and she will talk about how to keep them where you want them.
This is a unique chance to learn about one of nature's most powerful phenomena
(one we are all too familiar with) directly from one of the world's leading
earthquake experts. Don't miss it.
All Quiet at the RMC Quarry?
Well, its not exactly quiet
at the RMC Pacific Materials (née RMC Lonestar) cement plant and
limestone quarry. But some neighbors say they have softened somewhat the
annoying sound of the quarry tractors’ backup warning, and it should soon
install new fan mufflers at the plant that may mute the "mystery sound"
(see below).
Quiet also applies to RMC's plans for cement plant
and quarry expansion. The plant application is on hold until RMC's meets
the county's request for additional information, while the quarry expansion
application (this is the one to stripmine new areas within the allowed
mineral extraction zone, not an application to quarry on their residentially
zoned property on Smith Grade) has been officially closed by the county.
This doesn't mean that RMC cant reapply. But the company's long delay in
completing studies the county wants to determine the expansions affect
on groundwater (especially the City of Santa Cruz's Liddell Spring water
source) exceeded the time allowed for the application to remain legally
active.
Meanwhile, the RBDA has formed a task force to keep
tabs on RMC's expansion plans, chaired by new RBDA board member Bill Hornaday.
The task force is currently researching legal issues regarding the company's
various expansion plans and operating permits. If you are interested in
participating on this task force, contact Bill at 421-0167.
We have now close to 400 signatures on the petition
opposing rezoning of residential areas of Bonny Doon to allow quarrying.
This is about a third of all Bonny Doon adults. If you want petitions to
circulate, contact the RBDA at the address on the back, or e-mail us via
our website.
One of the harder things in our struggle to keep
RMC from stripmining more of Bonny Doon is estimating when it will try
to get the county General Plan and zoning changed. This depends on how
long RMC can obtain useable limestone from their existing quarry (plus
the expansion, if its approved). Speculation runs from three to 20 years.
We don't know if RMC itself knows.
We've also learned how hard it is to figure where
the limestone is, and its suitability for cement. According to geologist
Roberta Smith, new U.S. Geological Survey maps show only three significant
deposits of limestone in the county, much less than we thought. One, on
the Pogonip side of UCSC’s property, has long been depleted. The second
is the now abandoned RMC quarry straddling San Vicente Creek. (And when
does RMC plan to fix the mess they've created up there?)
The third is the present quarry below Smith Grade.
Smith says limestone here doesn't occur in clearly
defined "lenses." A lot of it is mixed with other minerals and makes poor
cement. RMC must mix some of that with the purest limestone to get a high
grade product. RMC could run out of sufficient quantities of the good stuff
in only a few years, which would speed up its expected request to rezone
its residential property for mining.
This happened at their San Vicente quarry, which
still has plenty of limestone, but RMC officials say it is such poor quality
that it isn't worth mining.
If RMC cant get a good usable supply of local limestone,
it must either alter the use of its Davenport plant, or close it. This
would be good and bad. Good, because it would eliminate the town's dust
and noise, and property values would soar. Bad, because people would lose
jobs, and the county would lose its biggest taxpayer. Also, bad because
no law requires the cleanup and removal of abandoned cement plants. Eventually,
Davenport could be left with a huge hulk in its midst, with who knows what
contaminants leached deep in its soil.
But that is a long way down the road. In the meantime,
RMC wants to pour about $10 million into the plant. Their verbalized reason
is to boost the plant's efficiency and to better keep down the dust. We
worry that with the economy booming and big projects on the horizon, RMC
may ask the county to boost the amount of cement the plant is allowed to
produce by its use permit. Of course, that would deplete their limestone
all the sooner.
The planned plant expansion is huge. It includes
a 35,000 square foot, 56 foot high storage structure for materials, and
an 80 foot high, 47,000 square foot dome where materials are mixed. Since
this dome sits on a hill it will loom 315 feet above the town (only 50
feet lower than the top of the plant's tower), even after RMC digs a hole
for it, and uses some of the dirt removed as a screening berm.
Many Davenport residents are upset about the visual
impact of these huge structures, and have asked the county to create better
photographic simulations of how things would look from various vantage
points. They also wonder why RMC intends to keep using the same dust producing
process it has been using to mix its materials, even though it is going
to also use the new process inside the dome that is supposed to reduce
the dust by two-thirds (from 1445 pounds a day to under 500).
At loggerheads on logging
In the January Highlander we took Big Creek Lumber
to task for its opposition to attempts to improve logging laws to better
protect streams, forests, wildlife and neighborhoods. Big Creek, the only
sizable locally based timbering company, and one which has a reputation
for environmentally responsible logging practices, was upset at some of
our charges.
To further dialog on this complicated issue, we recently
spoke to Bob Berlage, Big Creek's Forestry and Resource manager, and to
Supervisor Jeff Almquist and Mark Morganthaler of Citizens for Responsible
Forest Management (CRFM). We learned we were mistaken when we wrote that
Big Creek Chief Forester Mike Jani went back on rules changes he had agreed
to in negotiations with Almquist and Morganthaler. Also, the suit Big Creek
has filed seeks to overturn the county's authority to regulate where logging
can be done through zoning laws, which Big Creek has always maintained
is illegal, not the special rules the supervisors have asked the state
board to put into effect for Santa Cruz County. We apologize to Big Creek
for these errors.
But let's get to the real issues: are there problems
with logging in Santa Cruz County, are streams and fishlife being harmed,
are there areas that are overlogged, are private roads being damaged by
logging trucks, is the quality of life of neighborhoods being harmed in
a meaningful way, and does the county have the legal power to make beneficial
changes? CRFM, and the RBDA, argue that there is evidence that the answer
is yes.
Big Creek's Berlage says that by and large the existing
rules for timber harvests (which by law only the state, not the county,
can impose), with changes approved last fall by the forestry board, are
adequate to address any problems. The CRFM and majority of county supervisors
think more rules are needed, including a 300-foot no cut zone around homes
and better stream protection, and they have submitted these additional
rules to the state board.
Berlage dismisses CRFM data that show logging in
the county has doubled in the past 12 years because the base year was during
a recession. He also claims that although no one has definitive evidence
of whether the amount of private forest land in the county is growing,
Big Creek thinks it is and therefore can sustain more logging, (although
he concedes that development has taken a lot of land out of timber production).
According to Berlage, Big Creek "goes and above and
beyond" to ensure that reasonable neighborhood concerns are addressed when
it logs, but he concedes he has no knowledge of what the huge out-of-county
timber companies, who are increasingly focusing on Santa Cruz, do in their
operations. We believe that stronger rules are needed so we don't have
to rely on the good will of loggers.
CRFM had hoped Big Creek would lead the way in addressing
perceived problems, as it did in the past. Instead, it seems now to be
carrying the torch for the timber industry in opposing them. Berlage counters
that Big Creek has suggested adequate rules changes, and that, combined
with stiff enforcement (which has been woefully lacking by the state Dept.
of Forestry) they can solve any problems.
Big Creek is suing the county to overturn what now
seems established state law giving counties the right to control where
logging is permitted through zoning laws. Despite the state Supreme Court's
refusal to review an appeals court decision that counties have that power,
Big Creek is trying to fight that battle again, at potentially great cost
to itself and taxpayers.
Berlage also rejects out of hand the scientific evidence
behind CRFM’s suggestions for responsible forest management, saying "it
was just pulled out of a hat."
With the current hostile atmosphere, it seems this
will only be settled by political power and legal struggles, rather than
compromise, and everyone will lose more than they need to.
But there is a little hope that more compromise is
possible. Berlage still insists that Big Creek is always willing to discuss
these issues (except for the county's right to control where logging is
done through zoning laws). But until there is some agreement on just what
the problems are, trying to come up with mutual solutions seems fruitless.
Support Our Sponsors
You can help us continue to send the Highlander to
all Bonny Dooners, not just RBDA members. For $11 an issue your message
goes to 1100 Bonny Doon households, for only a penny each. Only 6-issue,
1-year contracts are accepted. The RBDA reserves the right to reject sponsorships
which may conflict with our goal of keeping Bonny Doon rural and natural.
To be a sponsor, send your check for $66 to RBDA, 102 Sunlit Lane,
Santa Cruz, CA 95060. Include your business's name, description (one line
maximum, about 10-15 words), address and phone.
David Hooks Construction Services
Residential and commercial construction.
High quality, courteous professional service.
426-9656. Lic.#649217 |
Hutton Sherer Marketing Advertising Design
Full-service, award-winning marketing and advertising
services.
2851-C Research Park Dr., Soquel, CA 95073. Ph. 479-0123 |
Santa Cruz Waldorf School
K-8 independent school providing arts-integrated academic
curriculum. Celebrating 22 years.
2190 Empire Grade, Ph. 425-0519 |
Water well survey will serve us well
To help in future planning as our population grows,
some of the most useful data regards water resources and usage. The data
for Bonny Doon is currently pretty sketchy. For example, the county has
only tracked water well permits since 1991, and has no database on the
hundreds of wells drilled before then.
The importance of good information was made clear
a couple of years ago when the City of Santa Cruz was trying to get county
permits to drill test wells along the coast near the mouth of Laguna Creek.
The city wanted to determine whether it was worthwhile to go ahead with
a plan to augment its water supply with huge wells in the area. Basing
its arguments that the project wouldn't affect Bonny Doon wells on this
very sketchy information allowed the city water honchos to downplay our
concerns.
Good information will also be important in trying
to accurately assess how much new growth could affect existing Bonny Doon
wells. It could help us persuade authorities that growth should be scaled
back, helping us to preserve Bonny Doon's character further into the future.
The information will be compared with other surveys and research going
back to 1959. It will be analyzed and presented in a form useful to both
planners and concerned residents.
Well Survey
1. Well location by address or parcel number
2. Total depth of well
3. Initial standing water level
4. Have you noted changes in the quantity or quality of your well or
spring water?
5. Have you measured a drop in your well's water level?
6. Have you had to abandon and redrill a well, or deepen your well?
7. Can you correlate these changes to drought, earthquake or neighboring
development?
Please send this information to:
RBDA
102 Sunlit Lane
Bonny Doon, CA 95060
...and write "Well Survey" on the envelope.
3 New RBDA Board Members
Three new members were elected to two-year terms
on the RBDA Executive Board at the January annual general meeting: Marilyn
Hummell, a longtime Sierra Club activist and 30-year Bonny Doon resident
(she previously served on the RBDA board in the 1980s); David Deamer, a
UCSC professor of molecular biology, and Bill Hornaday, a lawyer and sculptor.
Elected to a third two-year term was Ted Benhari, a semi-retired public
relations professional. Val Haley, a botanist who is docent coordinator
at the Bonny Doon Ecological Reserve, was reelected to fill out the remaining
1-year term created by a board resignation last year. Staying on the board
are Mark Bedford, executive director of the Bahá'í School,
and Fred Bryck, a retired computer systems analyst. Their terms expire
in January 2000.
We are very grateful for the contributions to preserving
our community made by outgoing board members Paul Hostetter, Marty Demare
and Miriam Beames, and are pleased that they will continue to serve the
organization in various ways.
Mystery Sound Gone?
By March 15 or so, RMC will install new parts on
a cement plant muffler that may eliminate the "mystery sound." RMC believes
the noise comes from a fan on its kiln, which will be shut for maintenance
on Feb. 22 for two or three weeks.
Let us know if the sound is truly gone. Also, if
you notice increased noise or dust from the quarry, especially at times
when it is supposed to be shut (weekends and weekdays after 5:30 p.m.),
write it down. If we are going to be able to do anything about it, we need
to document everything so we have solid evidence. Note the time and date
of loud noises, explosions, dust, etc. We will ask you for it at some point.
Gray Whale Committee Meets
We waited for several months for Dave Vincent, State
Parks Department's district supervisor, to schedule a meeting of the committee
to advise him on uses for the 2,300 acre Gray Whale Ranch, now part of
Wilder Ranch State Park.
Vincent finally scheduled a meeting, but it coincided
with the RBDA annual meeting on January 13, so we missed it. Some trails
in Gray Whale have been open for nearly a year. Supervision seems minimal:
we've observed numerous intrusions by bikers and horseback riders on areas
marked closed (including the area north of Smith Grade), and even trucks
driving out loaded with firewood.
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