HomeMy WebLinkAbout1996/07/15 Board of Appeals & Advisors Agenda Packet (2)
ITEM #3A
~I~ RECEIVED
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,~~~
mY Of JUL 03 1996
CHUlA VISTA
APPLICATION FOR A CODE MODIFICATION OR USE OF CITY OF CHULA VISTA
AN ALTERNATE MATERIAL OR METHOD OF CONSTRUCfION BUILDING & HOU$INGDEI'l.
la. The Board of Appeals and Advisors is legally empowered to (I) investigate and advise on the suitability of alternate
materials and types of construction, (2) provide reasonable interpretations of the building laws where the meaning may
be obscure, and (3) recommend new legislation to the City Council, The Board may recommend approval of minor
deviations of the building laws in certain àses,
lb. The Director (Building Official) is authorized to pernùt code modification and to approve the use of alternate
materials and methods of construction.
2. All appeals must be within the scope of authority described above. Only those items requested in writing in this appeal
will be considered.
3. Board of Appeals and Advisors hearings are open for public attendance. You will be notified of the hearing date.
4. Address all communications to: 'Director of Building and Housing, City of Chula Vista, 276 Fourth Avenue, Chula
Vista, CA 91910.
APPI.ICANT FILL IN BELOW lliIS LINE, lliIS SIDE ONL Y . PLEASE PRINT OR 1YPE
Job Address (please include zip code):
Owner's Name: Owner's Mailing Address: Telephone No.:
9.,œtJ..Æ,t& tillh:>rity P.O. Pox 2328, Chila Vista, CA 91912-2328 (619) 422-8395, ext. 612
Designer's Name: Telephone No.: Job Status:
!by Ie Ergiœerirg (619) 268-a:m roa Propooed
( 1 EKilting Buildins
Existing Use: Proposed Use: I J Under Construction
Væant \oàt.el:' 1teatIrB::t Fæi1ity I I Complete New Buildins
.-----------------.-----------------------------------------------..---..........
Qearly define aU items requested in the appeal. Submit plans and other documents as necessary to explain and support
request.
Projoct title: J..o.,a- 9.-.æt:\o.at.el:' River Pasin Ißniœralizatiæ Projoct. 9.-.æt:\o.at.el:' Ai..rt:h:ri.ty IS p:q:œ1Iß to
cms1:ru::t a \'Bt.eI:' tœatrralt plant that will t:ræt træki£t¡ ~t.eI:' fraT¡ the la.er 9.-.æt:\o.at.el:' River far
rTU1Ïcip3l use. (See attæhed for rrore ¡:rojoct infomatim. 'lœ tœatrrEnt plBnt will œ locatErl rn µ:esrntly
va:æt larrl that is ~tErl as l::eirß within the lCX>-yær: flcxrl plain. lè:µ=st: \oàive the ra:¡.rire1e:1t to
cms1:ru::t a b.Jild.irg µrl a!:x:7ve tiE lCX>-yær: flcxrl plain e1evatirn.
State why it is necessary or desirable that this request be approved and what arrangement, device or construction is proposed
as equivalent to that required.
'lœ Amrÿ Corµ; of Ergiœers have carpIetErl the charœlizatim of the Ia.er 9.-.æt:\o.at.el:' River, rut have rot carpletErl
qrlatirg its 1CX>-yær: flcxrl plain rœµ;. 'lœ tirre to carpIete the qrlatErl mµ¡ is lJ:Ì<rDo.n. (h:e carpletErl, the
p:ojoct ¡.uµÜy will ro lcrger œ stn.n within the 1CX>-yær: flcxrl plain. D..e to p::ojoct carrnittrralts, the
Authrity is recµætiig this varia'x:e arrl rot \'Bit far the Corµ; to carpIete the ræ¡:pirß.
1~(~ Richard A. ~lds, G:œral ttnIger 7/(1'1"
Owner or Authorized Agent's Signature: (tr additional space Is n!< ulred, plea.. attach ..parate sheet) Date:
THIS SIDE FOR DEPARTMENT'S USE ONLY
Case Number:
1-96
Job Address: 3010 NORTH SECOND AVENUE, CHULA VISTA, CA 91910
'IyPc:oC Storie. rare Use Occupancy Job SIal.. Pia. File (I
ConIlnK:lion Zone Zone
Additional Information Requested:
NOTE: Construction plans not available at time of application.
~~ C:;;, ~L
Investigated By: " Title: Director of Bldg & Hsg Date:
Kenneth G. Larsen, C.B,O. 7/10/96
REPORT OF CONDmONS AND APPLICABLE CODE SEC110NS:
.
Pursuant to Chula Vista Muni~ipal Code, Section 18.54.100 (Attachment "A"), the Board
of Appeals and Advisors is authorized to grant exemptions to the City's Floodplain
Development requirements. The proposed site for the Sweetwater Authority's
De-mineralization Project is located within a designated 100 year flood zone by
the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM).
FINDINGS AND RECOMMENDATIONS OF TIlE BUILDING DEPARTMENT:
CALTRANS and the Army Corp of Engineers have combined efforts to complete State Route
54 and the adjacent flood control channel, inclusive of realignment of the Sweetwater
River to discharge into the newly constructed channel. All properties formerly
affected by the Sweetwater River discharge are now fully protected by the construction.
The Army Corp of Engineers have completed the "As-Built" drawings of the channel.
However, the final amendments to the FIRM maps identifying that the area is not in
the 100 year flood plain remains incomplete.
Although the FIRM maps remain incomplete. staff recommends that the Board of Appeals
and Advisors approve the waiver of floodplain reauirements due to the completion of
the Flood Control Channel. This action is consistent with a similar action granted bv
the Board on the Wa1-Mart retail store located to the west of this proiect site in
Any;' I aa2 (CaRe 111-92\.
SUMMARY OF AC110N: Date of Action:
REVISED 3J9'
(B-POIUBMPI'EALS)
, . ' ,
,
LOWER SWEETWATER RIVER BASIN
DEMINERALIZATION FACILITY
INTRODUCTION
The Lower Sweetwater River Basin Demineralization Facility (LSRBDF) was
conceived in order to improve reliability of water service to customers by using
plentiful, poor quality, local supplies. CUlTently, Sweetwater Authority imports an
average of approximately 85% of the water it distributes. The LSRBDF will
reduce dependance on imported water supplies to 65% in Phase I and 45% in Phase
II. This will be accomplished by reclaiming and reusing local, poor quality
gr0!lndwater resources and adding other intermittent local supplies which are
available rrom time to time. The two phase LSRBDF includes a number of
integrated components. The Phase I portion of the LSRBDFis comprised of the
Urban Runoff Diversion System Phases I and II (URDS I and II) and the Lower
Sweetwater River Basin Demineralization Facility Phase I and would utilize
degraded groundwater in the Lower Sweetwater River Basin, diverted flows rrom
URDS I and II, and San Diego Formation groundwater in the Authority's service
area to produce potable water. The LSRBDF Phase II consists of the expansion of
the Lower Sweetwater Basin Demineralization Facility and the construction of a
Seawater Barrier coupled with reclaimed water distribution facilities. It would
utilize additional groundwater to increase potable water production. Reclaimed
water from the middle basin transported by URDS and/or reclaimed water treated
in the lower basin would be carried by supplementary pipelines to reclaimed water
customers, with the seasonally rejected reclaimed water supplying the Seawater
Barrier project. An overview of the LSRBDF is shown in Figure 1.
BACKGROUND
Sweetwater Authority is a public water agency providing service to a population
of 165,000 in National City, portions ofChula Vista, and an unincorporated portion
of the County of San Diego known as Bonita. Sweetwater Authority is a unique
joint powers agency which was formed when the City of National City and South
Bay Irrigation District chose to work together to provide water service to the
residents of National City, Chula Vista, and Bonita. The South Bay Irrigation
District (SBID) and the City of National City formed Sweetwater Authority by the
1
\ ATTACHMENTS FOR ITEM "6"
·
Joint Powers agreement of February 1, 1972, amended _and re-adopted on July 22,
1977. Sweetwater Authority was formed pursuant to -the provisions of Article 1,
Chapter 5, Division 7, Title 1 of the Government Code of the State of California
(commencing with Section 6500). The Authority began operation of the water
impounding, distribution system, and supportive assets fr0111 the California-
American Water Company, a private utility, in August of 1977. The legal
ownership of the system at that time was in the name of the South Bay Irrigation
District. Sweetwater Authority became the owner and operator of the system in
1990.
Sweetwater Authority now operates and maintains a 108 year old water system
whose origins date back to pre-1888 when Sweetwater Dam was constructed. The
water system presently includes the following facilities: two reservoirs, including
the 28,079 acre-foot (AF) capacity Sweetwater Reservoir and the 25,400 AF
capacity Loveland Reservoir which together provide approximately 54,000 AF of
storage for locally produced and imported water; Sweetwater River, which is used
to transfer water ITom Loveland to Sweetwater Reservoir; the 30 million gallons per
day (MGD) Robert A. Perdue Treatment Plant at Sweetwater Reservoir; two
groundwater wells; groundwater rights along the Sweetwater River; 18 water
storage tanks; 25 pump stations; and 425 miles of transmission and distribution
mams.
PROJECT DESCRIPTION
LSRBDF PHASE I
Sweetwater Reservoir Urban Runoff Diversion System (URDS I and IJ)
Recharge of the alluvial aquifer is essential for a viable groundwater
demineralization project. In 1977, the State of California Department of Health
Services requested the Authority to address degradation of the Sweetwater
Reservoir's water quality due to increasing urbanization of the adjacent lands. At
that time, all runoff ITom the watershed flowed directly into the reservoir. All
recharge of the lower basin was provided by runoff from the watershed below
Sweetwater Dam or on the rare occasion of enough precipitation for the Sweetwater
Reservoir to overflow. In order to address the increasing degradation of water
quality, the urban runoff diversion system was conceived. This system would
2
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divert poor quality runoff around the reservoir, but thr~ugh TDS sensors, allow the
higher quality runoff to continue into Sweetwater Reservoir. This strategy for
improving water quality was chosen iµ lieu of upgrading the Robert A. Perdue
Treatment Plant. The URDS, in conjunction with watershed management through
development review and monitoring, became one tier of the Authority's "multiple
barrier approach" to protect Sweetwater Reservoir as a local and regional asset.
This was also an opportunity to utilize the poor quality runoff as a source of
recharge for the lower Sweetwater River basin, with this recharge to eventually be
utilized as a portion of the feed water for the proposed Demineralization project.
In 1991, the Authority completed construction of the first phase of the urban runoff
diversion system (URDS I), which was constructed along the northern shore of the
Sweetwater Reservoir. URDS I currently diverts approximately 500 AF of poor
qU!i1ity runoff from the Spring Valley basin into the lower Sweetwater River basin.
Because URDS I is completed, it will not be considered as a part of the LSRBDF
for the purposes of this application.
Construction of phase II of this project (URDS II) is proposed to begin in the fall
of 1996. URDS II is considered an integral part of the Lower Sweetwater River
Basin Demineralization Facility because it provides an addition 1,000 AF of
rechargelbrackish feedwater to the lower Sweetwater River Basin, which in
conjunction with the existing URDS I will provide a total of 1500 AF of recharge
to the lower basin per year. This amount is equivalent to the amount proposed for
extraction by the demineralization project's alluvial wells, thus offsetting potential
adverse impacts of groundwater drawdown on other groundwater users in the basin
and impacts to sensitive biological habitat. Without recharge from URDS IT,
potential drawdown impacts to users and habitat would be significant. Figure 2
shows the location of URDS I and the proposed location of URDS II.
In addition to transporting degraded runoff, URDS I and II have the potential to
carry reclaimed water generated by the Otay Water District (OWD) Wastewater
Reclamation Plant on the middle Sweetwater River. This reclaimed water can be
used for injection into the San Diego Formation near San Diego Bay to prevent
saltwater intrusion.
The idea of diverting runoff with high dissolved solids is unique in the western
United States. Other purveyors in the West who collect water upstream of their
reservoirs do so to remove suspended solids from the water prior to releasing it to
4
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their storage reservoirs. In Sweetwater Authority's .case, these diverted flows
contain dissolved contaminants, which can only be rell10ved by demineralization.
Contaminated flows are divelied around. Sweetwater Reservoir after being retained
in detention ponds. These ponds provide settlement of suspended solids, as well
as utilization of nutrients by wetland vegetation in the ponds. The partially treated
runoff is then discharged in the lower basin where it becomes a brackish water
source to the future lower Sweetwater River Groundwater Demineralization Project.
Section 13050 (d) ofthe State Water Code defines "waste" as including sewage and
other contaminants associated with human habitation. This section could be used
to construe that contaminated urban runoff is "wastewater". Section 13050 (h)
defmes reclaimed water as water which, as a result of treatment of waste, is suitable
for direct beneficial use...that would not otherwise occur and is therefore considered
a valuable resource. Again, Sweetwater Authority urban runoff is treated within
thé URDS and again at the Groundwater Demineralization facility.
Lower Sweetwater River Basin Demineralization Project Facilities
An overall view of the lower basin Demineralization facilities is shown in Figure
3. .
Demineralization Plant
A building will be constructed to contain the reverse osmosis (RO) treatment
facility, a laboratory, a chemical feed system and pumping facilities. Chemical
storage tanks, pre- and post- treatment facilities, an aeration tower and a 400,000
gallon treated water storage tank will also be constructed on the Demineralization
plant site. Figure 4 shows the layout of these facilities. The RO building will be
constructed to accommodate future expansion of the facility to 10 MGD.
Alluvial Wells
Four alluvial wells are proposed to extract groundwater with total dissolved solids
(IDS) ranging from 1,700 to 3,100 parts per million (ppm) from depths of
approximately 100 feet. Approximately 250 gallons per minute (GPM) of
groundwater will be pumped from each well. Total annual extraction will be
approximately 1,500 AF. Pumping rates will vary, depending on groundwater
conditions, and will be modified in order to avoid adverse impacts to the riparian
habitat along the lower Sweetwater River.
6
San Diego Formation Wells
The alluvial groundwater is underlain by the San Diego Fonnation, which is located
at depths ranging from 200 to 1,000 feet. It is estimated that approximately one·
million AF of water with TDS levels ranging from 500 to 2,000 PPM is stored in
the San Diego Formation within the Sweetwater Authority service area. Natural
recharge of the San Diego Fom1ation is estimated to be as high as 1,500 AF per
year. Six 600 GPM wells will extract water ii-om the San Diego Formation for a
total of approximately 3,000 AF per year. Normally, four San Diego Formation
wells will be in operation, with the additional two wells operating only in the event
of reduced production from the alluvial wells.
Conveyance Facilities
A total of 10,000 linear feet of pipelines will be constructed in public rights-of way
or in. easements. Eight-, 12-, and 16-inch pipelines will convey brackish feedwater,
treated product water, rejected concentrate, and surplus potable water to be injected
into the San Diego Fonnation.
Concentrate Disposal
Approximately 0.8 MGD of concentrate will be generated by the Demineralization
plant. A 12-inch diameter pipeline will discharge the concentrate into Upper
Paradise Creek, which has been channelized through the project site. This chânnel
empties into the tidal zone of the lower Sweetwater River, which ultimately flows
into San Diego Bay.
Injection
The San Diego Formation wells will be equipped to inject potable water. The
brackish water conveyance lines will altemative1y be used to transfer the potable
water to be injected. A 12-inch pipeline will be installed at the Demineralization
plant to create the "reverse flow" condition. Currently, during heavy rains, when
the Sweetwater Reservoir overflows, the water is irreclaimable for potable use.
With the proposed injection capability, this overflow can be injected into the San
Diego Formation for future use.
LSRBDF PHASE II
San Diego Formation Wells
Six new wells in the San Diego Formation will be required to supply additional
water to expand the RO plant capacity from 4 MGD of product water to 8 MGD.
9
No new wells in the alluvium of the Sweetwater Rive.rs will be utilized.
Plant Expansion
The plant piping and building size for the Phase I RO plant will allow the
construction of the Phase II RO units as a modular expansion without the need for
new building space. The Phase II RO will require an additional treated water
storage facility and additional pumping equipment.
Seawater Barrier
The Seawater Barrier will consist of a line of wells approximately two miles west
of the plant site and along the east side of Interstate 5 Freeway (I-5). It is
anticipated that six or more wells will be required. Piping to bring reclaimed water
to the balTier will come from the source which is not finnly established at this time.
The. County of San Diego is studying a 10 MGD Reclaimed Water Treatment
Plant (RWTP) and Otay Water District has an existing 1.0 MGD RWTP which
could be expanded to meet a pOliion of the Authority's future needs. Additional
the City of San Diego has agreed to bring a Reclaimed Water transmission line to
the Authority's south boundary if required. It is anticipated that the Authority
would purchase wholesale priced reclaimed water, sell reclaimed water to its
customers along the route of the pipeline, and inject the seasonal reject in the
Seawater Barrier.
COST ESTIMATES AND GRANT FUNDING
The total estimated cost of the LSRBDF is $22.25 million, with $15.1 million for
Phase I and $7,15 million for Phase II. This excludes the cost of URDS I since
that project has been completed. Based on the production of3600 AF of water, the
cost of treating the brackish water is expected to be $834 per AF commencing in
1998. Tables 1, 2 and 3 summarize the capital costs, operating and maintenance
costs and estimated cost per AF through the year 2009.
A grant request has been submitted to the Bureau of Reclamation for this project.
The Bureau has approved LSRBDF Phase I (including URDS II) and LSRBDF
Phase II for grants funding up to 25% of capital costs. This Bureau of Reclamation
funding may not be dispensed to Sweetwater Authority for a number of years, and
may not necessarily persist throughout the life of the development of Sweetwater
Authority LSRBDF.
c:v.'P51\dltl\swa\demin\mwd.des
10
Table 1
LOWER SWEETWATER RIVER BASIN DEMINERALIZATION FACILITY
CAPITAL COSTS ESTIMATE SUMMARY
ITEM DESCRIPTION COST
PHASE I
1. RO FACILITY
Demineralization Facility $ 4,950,000
Product Water Pipeline $ 10,150
Iniection Water Pioeline $ 40,910
Brine Disposal $ 14,500
Soil Stabilization and Dewaterino $ 242,900
Electrical Distribution $ 159,000
Telemetry To Wells $ 120,000
Contingencies $ 655,540
SUBTOTAL $ 6,193,000
2. ALLUVIAL WELLS
Alluvial Wells $ 178,000
PÎDelines $ 206,000
Contingencies and Right of Ways $ 316,000
SUBTOTAL $ 700,000
3. SAN DIEGO FORMATION WELLS
San Dieoo Formation Wells $ 1,272,400
Pioelines $ 100,000
Contingencies and Right of Ways $ 527,600
SUBTOTAL $ 1,900,000
4. URBAN RUNOFF DIVERSION SYSTEM
Pond $ 1,350,000
Pipelines $ 2,800,000
Low Flow Barrier $ 400,000
Contingencies $ 1,728,000
SUBTOTAL $ 6,278,000
TOTAL PHASE I $ 15,071,000
. PHASE /I
1. RO FACILITY
Demineralization Facilitv $ 1,950,000
Contingencies $ 200,000
SUBTOTAL $ 2,150,000
2. SAN DIEGO FORMATION WELLS
San Dieoo Formation Wells $ 1,300,000
Pioelines $ 150,000
Contingencies and Right of Ways $ 550,000
SUBTOTAL $ 2,000,000
3. INJECTION WELLS
Iniection Wells $ 2,100,000
p¡pe¡jnes $ 550,000
Contingencies and Right of Ways $ 350,000
SUBTOTAL $ 3,000,000
TOTAL PHASE /I $ 7,150,000
,
Table 2
--
LOWER SWEETWATER RIVER BASIN DEMINERALIZATION FACILITY
COST SUMMARY
PHASE I
RO ALLUVIAL SDF URDS II TOTAL
FACILITY WELLS WELLS
CAPITAL $ 6,193 $ 700 $ 1,900 $ 6,278 $ 15,071
ANNUAL CAP $ 585 $ 66 $ 179 $ 593 $ 1,423
ANNUAL 0 & M $ 1,174 $ 40 $ 180 $ 50 $ 1,444
TOTAL ANNUAL 1$ 1,759 $ 1061 $ 359 I $ 643 I $ 2,867
PHASE II
...
RO SDF INJECTION TOTAL
FACILITY WELLS WELLS
CAPITAL $ 2,150 $ 2,000 $ 3,000 $ 7,150
ANNUAL CAP $ 203 $ 189 $ 283 $ 675
ANNUAL 0 & M $ 640 $ 60 $ 120 $ 820
TOTAL ANNUAL 1$ 8431 $ 249 1$ 403 I $ 1,495
NOTES: (1) ANNUALIZED CAPITAL = 7% @ 20 YEARS
(2) ALL FIGURES IN 1995 DOLlJ\RS IN THOUSANDS
Table 3
0
LOWER SWEETWATER RIVER BASIN DEMINERALIZATION FACILITY
COST ANALYSIS
YEAR 1996 1997 1998 1999 2000 2001 2002
PRODUCTION (AFY 3600 3600 3600 3600 3600 3600 7200
O&M COSTS (1) $ 1,487 $ 1,532 $ 1,578 $ 1,625 $ 1,674 $ 1,724 $ 2,785
CAPITAL COSTS (2) $ 1,423 $ 1,423 $ 1,423 $ 1,423 $ 1,423 $ 1,423 $ 2,098
TOTAL COSTS $ 2,910 $ 2,955 $ 3,001 $ 3,048 $ 3,097 $ 3,147 $ 4,883
.
COSTlAF $ 808 $ 821 $ 834 $ 847 $ 860 $ 874 $ 678
PROJECTED MWD RATE/AF $ 520 $ 583 $ 594 $ 605 $ 614 $ 620 $ 621
MWD RATE PLUS GRP/AF $ 770 $ 833 $ 844 $ 855 $ 864 $ 870 $ 871
MAX. GRP INCENTIVElAF $ 250 $ 250 $ 250 $ 250 $ 250 $ 250 $ 57
YEAR 2003 2004 2005 2006 2007 2008 2009
PRODUCTION (AFY 7200 7200 7200 7200 7200 7200 7200
O&M COSTS (1) $ 2,868 $ 2,954 $ 3,043 $ 3,134 $ 3,228 $ 3,325 $ 3,425
CAPITAL COSTS (2) $ 2,098 $ 2,098 $ 2,098 $ 2,098 $ 2,098 $ 2,098 $ 2,098
TOTAL COSTS $ 4,966 $ 5,052 $ 5,141 $ 5,232 $ 5,326 $ 5,423 $ 5,523
COST/AF $ 690 $ 702 $ 714 $ 727 $ 740 $ 753 $ 767
PROJECTED MWD RATElAF $ 626 $ 646 $ 671 $ 693 $ 715 $ 738 $ 760
MWD RATE PLUS GRP/AF $ 876 $ 896 $ 921 $ 943 $ 965 $ 988 $ 1,010
MAX. GRP INCENTIVElAF $ 64 $ 56 $ 43 $ 34 $ 25 $ 15 $ 7
NOTES: (1) Annual 0 & M costs based on costs of $1,423 in FY 1995 plus 3% inflation rate
(2) Annual capital costs based on total capital costs amoritized at 7% over 20 years
(3) MWD water rate projections as of 3/23/93
ATTACHMENT "A"
a. Over-the-top ties be provided at each of the four comers of the manufactured home with
two additional ties per side at the intermediate locations. Manufactured homes less than )
fifty feet long require only one additional tie per side.
b, Frame ties be provided at each comer of the home with five additional ties per side at
intermediate points. Manufactured homes less than fifty feet long require only four
additional ties per side.
c, Each required tie of the anchoring system shall be capable of canying a force of four
thousand eight hundred pounds.
d. Any additions to mobile homes shall be similarly anchored;
6, All manufactured homes to be placed or substantially improved within zones A1-30, AH, and AE
shall be elevated on a permanent foundation such that the lowest floor of the manufactured home
is at or above the base flood elevation and be securely anchored to an adequately anchored
foundation system in accordance with the provisions of this Chapter.
D, For all new construction and substantial improvements, fully enclosed areas below the lowest floor
that are subject to flooding subject to flooding shall be designed to automatically equalize hydrostatic
flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting
this requirement must either be certified by a registered professional engineer or architect or must
meet or exceed the folIowing minimum criteria: A minimum of two openings have a total net area
of not less than one square inch for every square foot of enclosed area subject to flooding shall be
provided. The bottom of all openings shall be no higher than one foot above grade. Openings may
be equipped with screens, louvers, or other coverings or devices provided that they permit the
automatic entry and exit of floodwaters, )
(Ord, 2386 §4, 1990; Ord. 2248 §3, 1988; Ord. 2197 §1 (part), 1987; Ord. 2100 §1 (part), 1985; Drd. 2039
§1 (part), 1983; Ord. 1842 §1 (part), 1978).
18.54.070 Floodplain development-City engineer action.
The city engineer shall review all subdivision and land development permit applications and shall
make findings of fact and assure that:
A. All such proposed developments are consistent with the need to minimize flood damage;
B, Proposals for subdivisions and other new development incorporating more than five acres of fifty lots,
whichever is lesser, show on tentative parcels maps, tentative subdivision maps or site plans,
regulatol)' flood elevation data for any included area designated zone A, zone A1-30 or zone AD;
C, Adequate drainage is provided so as to reduce exposure to flood hazards;
D, All public utilities and facilities are located so as to minimize or eliminate flood damage;
E, The natural landscape of all designated floodways and major watercourses is substantially preserved;
F, An evacuation plan indicating alternate vehicular access and escape routes is filed with appropriate
Disaster Preparedness Authorities for manufactured home parks and manufactured home subdivisions
located within zone A, zones Al-30 and zone AO; I
(R 12/91) 1040
G. Within zones A1-30, new manufactured home parks and manufactured home subdivisions, expansions
to existing manufactured home parks and manufactured home subdivisions, and existing manufactured
( home parks and manufactured home subdivisions where the repair, reconstruction or improvement
,
of the streets, utilities and pads equals or exceeds fifty percent of the value of the streets, utilities and
pads before the repair, reconstruction or improvement has commenced have:
1. Stands or lots elevated on compacted f1l1 or on pilings so that the lowest floor of the
manufactured home will be at least one foot above the base flood level,
2. Adequate surface drainage and access for a hauler, and
3. In the instance of elevation on pilings, lots are large enough to permit steps, piling foundations
are placed in stable soil no more than ten feet apart, and reinforcement is provided for pilings
more than six feet above the ground level;
H. Any encroachments, including f1lI, new construction, substantial improvements, and other
developments within the designated regulatory floodways that would result in any increase in flood
levels during the occurrence of a one·hundred-year flood discharge are prohibited.
I. In the coastal zone, the city engineer shall review all subdivision and land development permit
applications and shall recommend to the City Council findings as to whether any proposed subdivision
complies with the provisions of the certified Local Coastal Program and the standards of Subsections
A-H, above.
(Ord. 2100 §1 (part), 1985; Ord, 2039 §1 (part), 1983; Ord. 1842 §1 (part), 1978).
18.54.080 New water and sewage systems.
New water and sewer systems shall be constructed to eliminate or minimize infiltration by, or
discharge into, floodwaters. Moreover, on-site waste disposal systems will be designed to avoid impairment
or contamination during flooding. (Ord, 2100 §1 (part), 1985; Ord. 1842 §1 (part), 1978).
18.54.090 Alteration or relocation of watercourses.
The city engineer shall review all plans for alteration or relocation of any watercourse within the city
to assure that the flood-canying capacity of such watercourse is maintained. The city will notify, in riverine
situations, affected communities and the State Coordinating Office prior to any alteration or relocation of
a watercourse, and submit copies of such notifications to the Administrator of the Federal Insurance
Administration. Moreover, city officers will work with appropriate State and Federal agencies in complying
with the National Flood Insurance Program in accordance with the National Flood Disaster Protection Act
of 1973. In the coastal, any subdivision that involves the alteration or relocation of a stream shall also
conform to the applicable provisions of the certified Local Coastal Program. (Ord. 2100 §1 (part), 1985;
Ord, 1842 §1 (part), 1978).
18.54.100 Exceptions granted by board of appeals.
A. The board of appeals and advisors of the city as established under Section 15.08.030 is authorized to
grant exceptions to the provisions and requirements of this chapter. The Required Fee(s) shall be
charged for processing all applications for an appeal hearing before the Board of Appeals and AdVÏ5ors.
(
1041 (R 6/92)
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