HomeMy WebLinkAbout01/29/2011, GOAL SETTING WORKSHOP - OCEANAIRE NEIGHBORHOOD DRAINAGE PROPOSAL JAN l' 2011
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January 24, 2011 MEETING AGENDA
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FROM: Jay D. Walter, Public Works Director prumm
VIA: Katie Lichtig, City Manager MWc Nevrs -;COUNCL
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SUBJECT:
SUBJECT: Oceanaire Neighborhood Drainage Proposal
The City received a letter from Dave Romero (attached) regarding the drainage situation in the
Oceanaire neighborhood, northwest of Madonna Road, and adjacent to Laguna Lake. This area
drains to Laguna Lake and was built with the expectation that the streets would hold water in
heavy rainfall events but that the houses themselves would not flood. Heavy flooding around
1970 showed that the homes would experience some flooding as well. The City attempted to
mitigate the problem to some degree after those severe storms by adding an additional culvert
crossing under Madonna Road to move water out of.the lake more rapidly. Evidence from storm
events since that time indicates that the culvert improvement has provided relief.
Mr. Romero has prepared a concept drainage plan that would provide some additional relief to
the area in the event heavy flows accumulate in the lake and rise into the streets. His proposal
includes the installation of a device (flap gate) that would allow water to drain from the streets
until such time as the lake filled up, after which the device would prevent lake water from
backing up in the drains and filling the streets. The concept also includes another way out for
water through a pipe going from the intersection of Oceanaire and Atascadero to the south side
of Madonna Road to dump into the creek. Staff has completed an initial review of the concept to
determine if it appears to be feasible.
The flap gate concept is feasible. However, staffs concern upon initial review is the necessity of
very careful and consistent preventive maintenance once such a facility was installed. There are a
number of other such facilities around the City, such as rock guards, which also require this type
of regular attention. Given potential staff resource reductions, staff is hesitant to recommend
installation of devices that need annual maintenance, but whose benefit is only for unusual
events. Because the devices would have to be placed in the flood waters to provide the proposed
benefit, if they malfunctioned during a storm, it is unlikely staff would be able to reach them and
effect a repair during the event. Failure to function properly could potentially cause water to back
up into the streets during normal storm events.
The additional culvert concept is feasible, but needs significantly more investigation. The
elevations used by Mr. Romero for the pipe crossing do not appear to match elevations of
existing construction so the concept would need to be modified to account for actual conditions.
Additionally there are a significant number of utilities in Madonna Road that will need to be
accounted for and potentially relocated to accommodate a gravity flow storm drain pipeline of
any size. While the intersection of Oceanaire and Atascadero is a low point, development plans
indicate water would still be over 2 feet deep in the adjacent block of Oceanaire before going
over a high point in the street to reach this inlet.
Oceanaire Neighborhood Drainage Proposal Page 2
As proposed, staff has estimated the costs of the conceptual project as follows:
Design: $70,000
Construction: $340,000 (includes 20% contingency for unknowns)
Construction Management: $60,000
It is not possible at this time, given a lack of detailed street and utility elevation information, to
completely determine if Mr. Romero's proposal is feasible. That said, staff agrees there are very
likely options to drain water away from this area during large events to assist in keeping the
water surface elevation down near the homes. Each will have limitations and drawbacks. If the
Council believes that the conditions existing in this area during significant rain events warrant
expenditure of funds, staff recommends only authorizing funding in the upcoming Financial Plan
to generate field data and concepts for future funding consideration. Staff estimates $50,000
would provide funding for detailed survey work and utility potholing.
Attachment: Romero Proposal
g.\staff-sports-gendas-minutes_Cpnemo 201111-2411 Eh oceanalre dminage pmposal.doc
January 4, 2011
Honorable Mayor and City Council,
During the intense and long-duration storms of 1969 and 1973 ( and to a lesser extent,
several times since),drainage culverts at the outlet of Laguna Lake under Madonna road
were incapable of handling the entire flow,thus allowing the lake to build up to a high
level. This caused flood waters to flow in REVERSE in the five drainage pipes which
normally drain Oceanaire Drive between Atascadero St. and Galleon Way,thus flooding
a number of houses. In each case the lake stayed high for a number of days, houses
remained flooded and Oceanaire Drive remained impassible.
Although the original flood analysis and the design of the subdivisions anticipated some
street flooding during major storms, it did not anticipate the intensity and duration of
extraordinary stomas. The city installed a third barrel to the culvert under Madonna Road
during the summer of 1973, and relieved most of the flooding of houses since that time.
However Oceanaire Drive often floods during intense storms. I believe the city has some
responsibility to reduce the flood risk and inconvenience.
After some considerable study, I have arrived at a solution which 1 believe will protect
the houses from flooding and greatly reduce the magnitude and duration of street
flooding. This can be done at a modest cost with no reliance on pumping. I propose:
a) On the lake end of the five drainage pipes from Oceanaire Drive, affix flap gates.
These open or close by water pressure, allowing drainage flow from the streets when the
lake is low and preventing flow from the lake to the streets when the lake is high.
b) Provide for drainage runoff from the subdivisions when the flap gates are closed by
installing a relatively small pipe(perhaps 30 inch diameter) from the catch basin at the
low point of Oceanaire Drive(At Atascadero St.), extending approximately 400 feet
across Madonna Road to the downstream outlet of the lake outlet drainage structure.
This solution should prevent flooding of houses, greatly reduce flooding on Oceanaire at
Atascadero, and contain flooding on Oceanaire between Galleon Way and Lakeview to
localized areas near the catch basins.
Although the solution is not perfect, I believe it is quite cost-effective. It works because
street grades on Oceanaire are very flat between Galleon Way and the low point at
Atascadero St.,thus allowing the entire area to drain by gravity before water builds up to
the point it can flood houses.
I request you have the City Engineering staff review this concept. If they agree it is
feasible and cost-effective,I will follow up with presentations during goal setting and
budget deliberations.
Respectfully submitted,
Dave Romero
Attached: Map showing proposed drainage pipe installation.
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January 28, 2011 `'2
Assn Cir�f�lf��
Dear Mayor Marx and Council Members,
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You have a difficult task and your service is appreciated. While residents can occasionally
be an anatomical pain, you must see that others are far more thanjust complainers and want
to present ideas for the good of all.
They say there are two sides to every story. There are also two views of a particular
statistic. The meaningful way to state the slight change in noise complaints would be:.
"Neighborhoods continue to experience 75% to 78% of the total noise complaints of the
previous year."
This year residents in neighborhoods were disturbed 2,300 times--only 700 fewer than the
previous year's 3,000. In my opinion, success should be claimed only when these numbers
are reversed. [Numbers reported for Jan-Dec '10 and Jan-Dec '09 respectively]
The police department has done many things over the last two years to address noise and
other neighborhood problems. The new ordinances, citations to owners for noisy tenants
and reduced response times are good examples. However, noise violations occur all over
the city—as do neighborhood enhancement ordinance violations and neighborhood parking
violations. The police have varied duties and there are sometimes more pressing problems.
It is the scope and volume of neighborhood problems that prompted RQN to request
creation of Neighborhood Services Specialist positions to augment the police by
concentrating on neighborhoods. After years and years of looking for more help, this idea
seemed promising to many of us.
Historically,the police in San Luis Obispo did not afford neighborhoods the service
required. Consider that police had the authority to issue citations for noise disturbances
long before the "new noise ordinances" took effect. However, the practice of issuing
repeated warnings with no consequences continued. Our new ordinances were put in place
to require citations after a warning was issued. We residents view the creation of these
ordinances as the backdrop for police to use their authority on our behalf. I believe our
neighborhoods would have remained more intact if residents had been supported
and protected many years ago. At this late date, small percentages of improvement are not
enough to save what is left of neighborhoods in decline. We can all be grateful for what the
police have time to do for us but acknowledge a plan for more help and far greater
improvement in"numbers"is necessary.
I have heard that some police prefer to engage in activities for which they were trained
rather than "baby sitting" in the neighborhoods. This is understandable ... it is also
understandable how this mindset might have affected service over the years. Again,
Neighborhood Services Specialists who could relate to residents who live with these
problems should be very strongly considered. It may even be a way to save revenue in the
long run since their salaries would not be as high as those of police officers.
Thank You for Your Continued Consideration,
Camille Small RECEIVE
Skyline Dr. JAN 31 2011
SLO CITY CLERK
RECEIVE®
JAN 2 8 2011
From:peter meertens[SMTP:MEERTENS@SBCGLOBALNET]
Sent: Friday,January 28, 20119:1632 AM SLO CITY CLERK
To:Council, SloCity
Cc Stanwych, Shelly, Paul Neel RED FILE
Subject:Council Goals and Budget Preparation MEETING AGENDA
Auto forwarded by a Rule DATE k 49 I ITEM # ' f-
Dear City Council Members, 60.4Sf,7z'M.v6 woefZi4op
In the Draft City Council Advisory Body draft 2011-13 Financial Plan the Joint Use Advisory
body recommended the installation of lights on Sinshiemer Park tennis courts. I am writing to
inform you that that there is strong opposition to lighting the tennis courts from the Sinshiemer
Parr neighbors. The City Joint Use Committee previously proposed this and a neighborhood
work shop was held at Sinshiemer Pool by the City Parks Department. While there is a vocal
group of tennis players that want to light the courts there is a large group in the neighborhood
opposed to the lighting the courts.
There are many reason we oppose lighting the courts including environmental impacts such as
increased noise,traffic and light pollution. The matter of the lighting the tennis courts was
brought to the City Parks committee for a discussion and the committee decided to explore
alternatives to lighting the Sinshiemer Courts to obtain addition tennis play hours. I am
concerned that the Joint Use Committee is does not represent the best interests of the
community but rather chooses to address the interests of a small group of tennis players that
wants to light Sinshiemer tennis courts.
1 considered presenting my views at the city budget meeting on January 29,2011, but I feel the
intention of the meeting is set goals for what we should want and not what we don't want. 1
believe that the City Parks Department is well aware of the Sinshiemer neighborhood
concerns. When the lights were last proposed numerous neighbors called the city,sent letters
and attended the meeting to express opposition to the lights.
If you have any questions please feel free to contact me.
Thank You,
Peter Meertens
2541 Santa Street
San Luis Obispo,CA 93401
Home (805)541-1184 -
Mobile (805)801-4287
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