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HomeMy WebLinkAbout01/29/2011, GOAL SETTING WORKSHOP - OCEANAIRE NEIGHBORHOOD DRAINAGE PROPOSAL JAN l' 2011 council mEmSd'Q'A' h hum RED FILE January 24, 2011 MEETING AGENDA DATE '1 11 ITEM #Ap�y.��rr�ti6 ��,a, Fr yX(cnD cvortKnm SNor� d crrYnroa C TO: City Council A ANTcm D Irpo FROM: Jay D. Walter, Public Works Director prumm VIA: Katie Lichtig, City Manager MWc Nevrs -;COUNCL un CU= 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. I � 1 I I I I I /26.2 I fb x I as I � I I 1 1 / 1 1 I i I L / I %v 05 I . CP 154ft II 5 y �.� aP �a-fe a1-ASCAN 0 11 W 1 �y I I V /18.12 FJevl Li.iP I 07 08 126,7`f srC.n"s��"<t �3 PVC 225ft o� - -O..CwI uiyp 1 7 1 MAOpN �1tou�lei - - -- - - - i01O January 28, 2011 `'2 Assn Cir�f�lf�� Dear Mayor Marx and Council Members, Cry+/ C.cC�ruc 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 hard co emam- �,�M� y'CDIR D DMR JR �ASSTCM FiT )C HIEF ATTORNEY R X CERR/ORIG POI10ECt�F �� PARKS 1kRECDIR � NEWTMMB4 HR DMR .,aSIACiTYNEWS �ICOUNCIL p CITY MGR CLERIC