| FLOODPLAIN
MANAGEMENT |
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HISTORICAL
FLOODING
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March
1911
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The headline
in the March 8, 1911, issue of the Salinas Daily Index described
storm conditions in the area graphically: "Disastrous effects of the
storm in the Salinas Valley is unprecedented." The following account
in the paper described the flood conditions within the general area:
This storm was
the most disastrous in the history of Monterey County and the damaged
property is unprecedented. It is reported that more than 2,000 acres
of valuable farming land has been destroyed along the course of the
Salinas River by the cutting away of the banks of that stream, which
is now a raging torrent, freighted with debris, from its source to its
mouth on the Bay of Monterey, near Moss Landing
At 10 o'clock
the river was said to be higher than at any time since the winter of
1862.
Flood conditions in
the Spreckels area were representative of many sections of the county, as
described in the Salinas Daily Index.
At Spreckels, all the lowlands are flooded and the water comes
to within thirty feet of the end of the factory, which is protected by
a heavy rock embankment. The river is nearly a mile wide at some points
there.
The electric light plant and the pumping plant, as well as two large oil
tanks near the factory, are half submerged. The No. 2 tank has been torn
loose
Barns and outbuildings and farmhouses all along the river
bottom south of Spreckels are under water, and tops of a few being all
that remain. Everything not securely anchored has been swept away.
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January
1914 |
The storms
of January 1914 did significant damage throughout Monterey County. The following
account appeared in the January 26 issue of the Salinas Daily Index:
Flood conditions
prevailed today everywhere throughout the Salinas Valley. Bridges have
been carried away, the railroad trains tied up, telephone and telegraph
service interrupted, and inestimable damage done as a result of the
torrential rains of Saturday night and Sunday. Salinas has been isolated
as far as communications south to Soledad and north to Castroville is
concerned
Damage to bridges
in the county was staggering. On January 27, the Salinas Daily Index
described conditions as follows:
Monterey County
has suffered an enormous loss through the damage and destruction of
bridges. Passengers arriving from Soledad and Gonzales say private reports
received at those places indicate the loss of all the bridges south
of Chualar. The Bradley, San Ardo, San Lucas, King City, Soledad bridges
are gone. Two spans of the Gonzales bridge have gone out. At Chualar,
one end of the bridge has sunk two feet and is one foot out of line.
At Gonzales, the people were this morning constructing a cable line
over which to send food and supplies on the other side.
Damage to these bridges
was estimated to exceed $300,000, and damage to properties throughout
the county came to over $1 million.
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1931 |
| A Christmas
storm in 1931 brought flood conditions to many portions of Monterey County.
Precipitation was dramatic; on the Carmel River, the San Clemente Dam overflowed
capacity. As noted in a December issue of the Monterey Peninsula Herald:
" Fed by storm swollen streams, San Clemente Dam staged the most sensational
rise in history last night, climbing 25 feet in 15 hours." The storm
continued for 5 days, bringing damage to Carmel Valley, Big Sur, and the
Monterey area. |
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February
1938 |
In February
1938, the Salinas River again flooded. The headline in the Salinas Index-Journal
of February 12 stated: "No, not the Mississippi-just the Salinas River."
Conditions in the county were serious.
Going out with
a roar that was hardly heard above the driving rain and lashing flood
waters of the Salinas River, 208 feet (2 spans) of the Soledad bridge
on U.S. Highway 101 was swept downstream at 9:15 p.m. Friday night,
adding wreckage to the swollen river which by Saturday afternoon appeared
to have reached the peak of one of the severest floods in the valley
in years.
At a dozen points
along the 70-mile river front from King City to the coast, the churning
water brought to an unprecedented high by the heavy rains in the mountains
and valley, brought damage to bridges, crops and roads, halted traffic
and marooned an estimated 60 families along the River Road on the west
side of the river.
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1941 |
The winter
of 1940-1941 produced flood conditions within several areas of Monterey
County, as recorded in the March 4, 1941, issue of the Salinas Index-Journal.
The River Road
a half-mile south of Spreckels was flooded and motorists were advised
not to attempt to negotiate it, as it also was under water at other
points southward. The Arroyo Seco road is closed to traffic, as is the
Pinnacles route out of Soledad. A washout also has blocked the Jamesburg
road in the upper Carmel Valley. Both the piers and the foundations
of the approaches to the Toro Creek Bridge have been washed out by flood
waters, making the span unsafe for traffic.
Streets were flooded
at Soledad, and old-timers said that the water was the highest since
1910. At the Trescony Ranch in the San Lucas district, 23 inches of
rain has fallen this year to make it the wettest sustained period in
history and the largest amount of rainfall for any season since 1890.
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January
1943 |
A dramatic
storm hit the Monterey Peninsula in January 1943, bringing flood conditions
to coastal areas of Monterey County. The following description appeared
in the January 22 issue of the Monterey Peninsula Herald:
A downpour of cloudburst
proportion flooded upper reaches of the Carmel Valley during Monterey
Peninsula's worst storm in a quarter century it was revealed as reports
began coming in from the outlying regions today. While counting the
storm damage continued to occupy local residents, it was reported that
5.50 inches of rain had fallen at San Clemente dam in the 48 hour period
ending at 9 a.m. today.
During most of
yesterday, over 6 feet of water was thundering over the spillway at
the rate of 8,000 cu. ft. per second, enough to fill the dam 7 times
each day. It is estimated by water company engineers that enough water
passed over the spillway during the storm to supply Monterey Peninsula
for the next four years.
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February
1945 |
A dramatic
storm hit Monterey County in February 1945. However, due to the prevailing
dry conditions, no appreciable damage resulted from this downpour. The following
account appeared in the Salinas Californian on February 2:
Heavy rains which
drenched Salinas and Monterey County yesterday and last night brought
a total of 1.69 inches of rainfall in a 36-hour period
The heavy rainfall
was general all over the county, including the southern section of the
county, with a report from the San Lucas of 3.82 inches for the entire
storm. The downpour ended one of the driest spells on record for this
time of year and was welcomed by farmers and cattlemen all through the
state.
Little damage was
reported in this locality, all creeks were up but there were no floods.
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January
1952 |
As noted
in the Salinas Californian of January 16, 1952 was another of the
significant flood years within Monterey County.
The rampaging Salinas
River, swelled by 6 days of heavy rain, today had left its banks, flooded
Spreckels Junction and forced evacuation by boat of several families
in that area ala also in Salinas on East John Street. The Salinas-Monterey
Highway was closed at Spreckels Junction bridge and probably will not
be opened until tomorrow
Old-timers said
the river was the highest it has been since the 1911 flood, and reports
this morning from King City said that the stream in that area was rough
and high. A crest of the river was expected today when water from yesterday's
rain in the mountains reaches this area
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January
1956 |
The Salinas
area of the county was threatened with potential flood conditions in January
1956. However, conditions never reached a critical stage as described in
the Salinas Californian of January 26.
Rainfall in the
Salinas Valley yesterday and this morning has raised the level of the
Salinas River to an all time high. The crest passed Spreckels about
10:30 a.m. and forced the closing of the Hilltown bridge early this
afternoon.
There was more
water in the river now than was the case in pre-Christmas storms (1955).
However, the water is flowing faster this time, principally because
most of the brush and leaves in the channel washed away during the Christmas
rains.
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April
1958 |
The torrential
rains of early April 1958 brought flood conditions to numerous counties
in northern California. Monterey County was no exception, as outlined in
the Salinas Californian on April 3.
Flood water swept
through Monterey County today as streams in the Salinas and Carmel Valley
watersheds overflowed their banks, closed roads, endangered residents,
drowning poultry, and damaging homes. The disaster proclaimed through
the state yesterday by Governor Goodwin Knight became a reality early
this morning after a near record cloudburst slashed across the country,
accompanied by high winds. This was the overall picture today, even
as the weatherman warned that additional heavy rain squalls are expected
tonight:
- The Carmel
river has gone over its banks flooding numerous home tracks bordering
the river the length of the valley.
- The Nacimiento
dam was reported filled and water is being released slowly to take
off the peak.
- Nearly 3-1/2
inches of rain in 24 hours in the Arroyo Seco has turned the placid
stream into a raging torrent ripping through summer cabin sites on
its way to the already swollen Salinas river. In the Greenfield area,
a marooned family was rescued by Army helicopters.
- The Salinas
River has overflowed its banks in numerous places, causing the closing
of the River and East Garrison Roads. Water may overflow the Salinas-Monterey
Highway as a result of the record flow in the Arroyo Seco River.
- San Lorenzo
Creek overflowed its banks in King City and spread through a chicken
ranch, drowning 23,000 birds.
- Coast Highway
1 to the Big Sur area was closed to automobile traffic by numerous
slides.
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February
1962 |
The Salinas
Californian carried the following account of flood conditions on February
9, 1962:
Heavy rains fell
on Monterey County last night and this morning, leaving more than an
inch of water throughout the Salinas Valley
In Salinas, there
was some flooding along South Abbott Street, in front of the California
Rodeo grounds, on North Main Street, along Nacional Street and Pacific
Park and at the end of Palma Drive in Serra Park.
The Salinas River
did not leave its banks and the flooding described above was the result
of localized drainage problems.
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January
1966 |
Flood
conditions along the length of the Salinas River caused extensive damage
during the storm of January 1966. Most of this damage was to agricultural
crops; over 32,000 acres were inundated, at an estimated loss of $6,572,000.
The cities in the county experienced some flooding and damage, although
the rural areas and agricultural production were the most affected. As noted
in the Salinas Californian on December 7:
The Salinas River
came booming down its bed during the early morning hours today, and
by 9:00 a.m. was flowing from abutment to abutment under the new bridge
on the Monterey-Salinas Highway.
The river peaked
at Bradley at 4:30 a.m. this morning, some three feet above the level
reached in the 1958 floods. The crest is expected to hit Salinas about
11 o'clock tonight according to Loran Bunte of the Monterey County Flood
Control and Water Conservation District.
The mouth of the
river is free, however, Bunte said, and flooding if any, will be minor.
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1969 |
| The year
1969 was perhaps the most severe flood year in Monterey County. There were
two distinct floods-one at the end of January and one at the end of February.
Each of these resulted in Monterey County being declared a disaster area.
In each flood, both the Salinas and Carmel Rivers went on a rampage. Damage
from the storms was extremely costly. As noted in the Monterey Peninsula
Herald of January 27: "County officials said they were certain
that the $6.5 million flood damage caused along the Salinas River in 1966,
of which 4 million was in Monterey County alone, would be exceeded."
Conditions within
the county were described as follows in the Salinas Californian
on January 27:
The Salinas
River cut a multi-million dollar swath of damage through the Salinas Valley
from Bradley to the Pacific Ocean today. The Valley has been awash in
what County Water Engineer Loran Bunte calls the 100-year flood since
Saturday evening. A flood crest only slightly lower than that which passed
Spreckels at 40,000 cu. ft./sec. early this morning, is rolling up river
from King City this afternoon. The Monterey County Flood Control and Water
Conservation District office and the U.S. Army Corp of Engineers say flooding
will continue through Wednesday.
Monterey County
Administrator and Civil Defense Director Walter Mansfield declared the
county a disaster area Sunday. His declaration triggers the mechanism
through which the county may be compensated with federal funds for public
facilities damaged by the flood.
Salinas Valley
agriculture, which sustained a $3,755,000 loss in the 1966 flood, will
almost certainly be hit harder this year.
One month later,
the Salinas River again flooded. Once more, much damage occurred, as noted
in the Salinas Californian on February 26.
The Salinas River,
fast, deep and a mile wide, flowed as flood crest through the Salinas
Valley this morning, cutting a swath of muddy destruction.
Route 1 was closed
at 10:30 a.m. at Twin Bridges near Nashua Road as the river's crest
surged toward the ocean, overflowing the highway and drowning the artichoke
field delta around Mulligan Hill.
The city of Salinas,
which underwent some anxious moments fretting about the possibility
of urban flooding last night, remained high and dry as the crest passed.
City and county officials had feared a breakthrough by the river in
the old Alisal Slough near the Firestone Tire & Rubber Company plant
south of town, and the possible intrusion of flood water into the city's
industrial area. But it didn't come, although lake-like ponds of surface
water now ring the entire Salinas area.
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February
1973 |
Flood
conditions occurred again in the Salinas area and other portions of the
county in February 1973, as noted in the Salinas Californian on February
13:
A fifth straight
day of rain in the Salinas Valley created power failures, closed some
Monterey County schools, and added to the mounting alarm of local farmers
who face substantial revenue losses from the delay in planting spring
crops
The principal flooding
problem in Salinas has occurred on Williams Road near Alisal High School,
according to Tom Wong, of City Public Works Department. The water has
been channeled down Williams Road from the foothills and nearby farmland,
Wong said. But so far the flooding within the city hasn't been serious.
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1978 |
In 1978,
flood conditions again occurred in many areas of Monterey County, as noted
in the Salinas Californian on February 13:
Pounding weekend
rains have left Salinas Valley farmers looking at an estimated $20,000,000
in flood damages today. Damage was concentrated along the banks of the
Salinas River from San Ardo out to the sea.
More than 20,000
of the valley's 200,000 irrigated acres of land were covered with overflow
waters from the Salinas River at some point Saturday or yesterday. As
much as 1,000 acres of the valleys prime farmlands could be flooded
beyond agricultural use this year.
The assessment
of damages, exceeding those of even the valley's 1969 flood, comes today
from Flood Control Engineer Loran Bunte and Agricultural Commissioner
Richard Nutter.
Bunte said the
$20,000,000 estimate is based upon his staff's assessment of damages
as extensive but perhaps not quite as severe as those of 1969, placed
at about $16,000,000. Allowing for inflation, that puts the new flood
at about $20,000,000 he said. Damage would have been far more severe
if not for the flood control capacities of both Nacimiento and San Antonio
dams, Bunte said. Two dams, almost bone dry two months ago, was holding
290,000 acre feet of water at Nacimiento and 137,000 acre feet at San
Antonio this afternoon. That puts Nacimiento at peak holding capacities
already, and with some water being released over the weekend to leave
required flood control storage reserves.
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March
1983 |
| Heavy
rains caused extensive flooding and erosion on March 3, 1983, in the Salinas
River Valley. Farmland and roadways were damaged, and Monterey County was
declared a disaster area. The unofficial peak discharge at Spreckels gage
was 63,172 cuffs, close to a 50-year flood. (The USGS has not verified the
Spreckels gage discharge.) The San Antonio and Nacimiento Dams and associated
reservoirs aided in attenuating the flows that occurred in the valley. |
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January
1995 |
| Monterey
County experienced prolonged and sustained precipitation in January 1995
resulting in extensive flooding throughout the region. Most river valleys
were affected, with major damage experienced in the Pajaro Valley and Carmel
Valley. On January 9 and 10, 1995, Monterey County was subjected to an intense
winter storm during which up to 6 inches of rainfall was received in some
areas. The Monterey County Water Resources Agency rated the storm as a 10-
to 20-year event.
Five localized areas
within the Carmel Valley area were significantly affected by downstream
flooding of the Carmel River: Camp Stephani, the Robles Del Rio area of
Carmel Valley village, the area adjacent to the Schulte Road Bridge, the
Rio Road area adjacent to Highway 1, and Mission Fields.
The January 1995
flood damaged 125 residences resulting in an estimated damage cost of
approximately $2.5 million. In addition, an estimated $927,000 in damage
to public facilities and utilities also occurred. Various agencies and
organizations were involved in the response to the flood. The Monterey
County Emergency Operations Center (EOC) was activated by the Office of
Emergency Services (OES), three "Incident Command Posts" were
established in the flooded areas, and the Emergency Broadcast System was
utilized.
The County Board
of Supervisors declared a local emergency, the Governor declared a state
of emergency in Monterey County and other affected counties, and President
Clinton declared the State of California a "Major Disaster Area,"
designated as "FEMA 1044-DR-CA."
Shortly after the
January 1995 flood, the Monterey County Water Resources Agency made a
number of recommendations for corrective actions to the County Board of
Supervisors. These recommendations included the installation of better
communications equipment and procedures, and encouraging floodplain resident
responsibility through the establishment of "Neighborhood Emergency
Preparedness Plans." The Board Report also outlined recommendations
for improving the condition of the "Carmel Valley Coordinated Emergency
Response Plan," which had been in draft form since 1990 and designating
Mission Fields and the Rio Road area as "Communities at Risk"
in the Carmel River Flood Plan in the County's Multi-Hazard Emergency
Plan.
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March
1995 |
| From March
10-13, 1995, Monterey County experienced a second significant winter storm
which resulted in sustained precipitation falling on already-saturated watersheds.
Devastating flooding occurred throughout the County, particularly along
the Carmel, Arroyo Seco, Salinas, and Pajaro Rivers. Damage was extensive
throughout the County with virtually every community affected. Pajaro, Castroville,
Mission Fields, Carmel Valley, Cachagua, Carmel Highlands, Spreckels, and
Big Sur sustained devastating damage. Over 1,500 residences were damaged,
including 60 homes which were declared uninhabitable. In addition, an estimated
100 businesses were affected, and the tourism industry sustained substantial
losses for a period of several months.
In all, over 11,000
people were directly affected, and major portions of the County's agricultural
lands subjected to widespread destruction. California was again declared
a Federal Disaster Area designated as FEMA 1046-DR-CA.
In particular, flooding
of the Salinas, Carmel, and Pajaro Rivers forced mass evacuations in San
Ardo, King City, Greenfield, Soledad, Gonzales, Chualar, Spreckels, the
River Road area, parts of Salinas, Castroville, Moss Landing, Pajaro,
and the Carmel Valley.
Damage to Private
Property:
The March floods
resulted in County-wide devastation to private property resulting in over
11,000 evacuations and damage to 1,500 homes and 110 businesses. Following
is a summary of the damage which occurred in each community:
| Carmel
Valley |
400
residences damaged |
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68
businesses damaged |
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2,500
evacuations |
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| Mission
Fields |
220
residences damaged |
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Total
evacuation of all residences |
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| Robles
Del Rio |
80
residences damaged |
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| Cachagua
|
100-150
residences damaged |
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| Pajaro |
All
residences (600+) and businesses damaged |
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2,500
(out of a total population of 5,000) evacuations |
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| Castroville |
312
residences damaged |
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38
businesses damaged |
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1,320
evacuations |
| Spreckels |
13
residences damaged |
Damage to Public
Facilities:
At the height of the
flood on March 13, 63 roads and 15 bridges were closed, including the Highway
1 bridge over the Carmel River. The closure of the Highway 1 bridge over
the Carmel River resulted in the complete elimination of access to portions
of Carmel Valley, Carmel Highlands, and Big Sur for a period of several
days, requiring evacuations to take place with helicopters. Other significant
effects to public facilities and services included the following:
- Of the 63 roads
and 15 bridges which were closed, 62 roads and three bridges sustained
damage.
- Public and private
water systems were damaged, affecting approximately 3,500 homes and
businesses. Eight large water systems and over fifty small systems were
affected with the largest being Castroville (1,350 connections). Many
residents were without domestic water service for extended periods.
A number of areas were required to boil domestic water prior to use
until the water quality was confirmed as safe.
- Sewage treatment
facilities and private septic systems along all three major rivers (Carmel,
Salinas, and Pajaro) were flooded and untreated sewage was released
into the rivers. The amount of untreated sewage released could not be
confirmed, but it may have been many thousands of gallons. Major treatment
plants affected included Carmel Ranch, Watsonville, King City, Soledad,
and Gonzales.
- Gas and electric
service provided by Pacific Gas and Electric were affected by the storm,
resulting in serious disruptions in service to widespread areas.
- Many public facilities
and services were closed or interrupted, including public schools in
affected communities.
- Zmudowski State
Beach was closed as a result of the discovery of 27 barrels of potentially
hazardous materials on the beach
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February
1998 |
| In February
1998, a series of "El Niño" winter storms hit various parts
of California, and particularly Monterey County. Close timing of the rainfall
events contributed to intense flooding, in that heavy rain would continually
hit ground that was still saturated from the previous rain. An estimated
50 roads and highways were closed or restricted, in most cases due to washouts,
landslides, and mudslides. Several communities were evacuated, particularly
the entire town of Pajaro near Watsonville, all residents of the Sherwood
Lake Mobile Home Park near Carr Lake in Salinas, and portions of Bolsa Knolls
and Toro Estates. Drinking water quality warnings remained in effect for
certain areas for some time afterward. By the end of the first week of February,
at least 6,600 homes and businesses had been without power for varying periods
of time. The State Governor declared Monterey County, amongst others, a
disaster area.
The most significant
type of damage involved land and mudslides. In particular, the Las Lomas
area experienced severe damage of eight residential parcels which Monterey
County acquired, through the Federal Hazard Mitigation Grant Program,
removing all property improvements. Each parcel was subsequently rezoned
to "open space" in perpetuity.
County-wide, losses
resulting from the February 1998 events are estimated at over $38 million,
with specifically agriculture-related losses totaling over $7 million
and involving approximately 29,000 damaged acres.
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