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2011-27595 Reso RESOLUTION NO. 2011 -27595 A RESOLUTION OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, APPROPRIATING FUNDS IN THE AMOUNT OF $81,921, FOR CONSULTING SERVICES FOR THE SUNSET HARBOR STORM WATER SYSTEM, WITH FUNDING FROM FUND 429, STORMWATER PROJECTS LINE OF CREDIT; WITH SUCH FUNDS TO BE REPAID FROM PROPOSED FUTURE STORMWATER BONDS FOR THE SUNSET HARBOR PUMP STATION UPGRADES PROJECT. WHEREAS, the Sunset Harbour neighborhood was determined to have multiple stormwater infrastructure deficiencies that impact the way in which surface runoff is stored, Y , treated, and conveyed; and WHEREAS, In Fiscal Year 2010/2011, the City created a capital project entitled Sunset Harbour Pump Station Upgrades to allow staff to address an identified stormwater problem and construct the necessary improvements to provide a five -year, one -day level of service; and WHEREAS, staff has developed a preliminary model of the existing and proposed conditions and developed drainage concepts that address the flooding problems; and WHEREAS, staff has negotiated with A & P Consulting and Transportation Engineers (APCTE), a consultant from its pre - qualified list, to provide a retrofit design to provide a five - year, one -day level of stormwater service and an advanced design that incorporates the basic design and includes additional improvements to achieve an enhanced level of service NOW, THEREFORE, BE IT DULY RESOLVED BY THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, that the Mayor and City Commission hereby authorize the appropriation of funds, in the amount of $81,921, for consulting services for the Sunset Harbor stormwater system, with funding from Fund 429, Stormwater Projects Line of Credit; with such funds to be repaid from the proposed Future Stormwater Bonds for the Sunset Harbour Pump Station Upgrades Project. PASSED AND ADOPTED this 9th day of February, 2011. ATTEST: Ct lad" Pa- U- / / / _lJ► / Robert a Parcher, City Clerk at i�� e r - a : ower,'Mayor T:WGENDA\2011\2 -09 -11 \Drainage - Sunset Harbour reso.doc APPROVED AS TO FORM & LANGUAGE FOR EXECUTION , - -It • rney /)'7 Date my ��l COMMISSION ITEM SUMMARY Condensed Title: A Resolution appropriating funds in the amount of $81,921, from Fund 429, Stormwater Projects Line of Credit, for stormwater infrastructure improvements in the Sunset Harbor neighborhood. Key Intended Outcome Supported: Ensure well maintained infrastructure. Supporting Data (Surveys, Environmental Scan, etc.): According to the 2009 Community Satisfaction Survey, only 43% of residents rated the City's storm drainage (to avoid flooding) as "excellent" or "good." . Issue: Shall the City Commission adopt the Resolution? Item Summary/Recommendation: The Sunset Harbor Neighborhood has three storm water issues. First, there remains insufficient discharge capacity to achieve the desired level of service. Second, there is inadequate conveyance (catch basins are too small and the streets are improperly graded) that limits the ability of storm water to reach the outfalls in a timely fashion. Third, there is backflow of ground water from an exfiltration trench at the northwest corner of the neighborhood that causes localized flooding during high tides. These mechanical and piping issues lead to street flooding that is exacerbated during periods of high tide. Staff negotiated with a pre - qualified engineering firm to develop a proposal for a retrofit design to augment the capacity of the Sunset Harbor drainage system to meet a five -year, one -day level of storm water service. In the retrofit design, the City is planning improvements to provide redundancy and additional discharge capacity. To this end, improvements may include interconnecting the basins, upsizing the pump stations to accommodate larger contributing areas, construction of new drainage wells along with the redevelopment of the existing drainage wells to provide greater discharge capacity. Weirs and detention boxes will be provided to meet the requirements of the various regulatory agencies. The City will also mill and resurface the streets in the neighborhood, adjusting grades to provide better storm water conveyance and to reduce ponding. The problematic exfiltration trench will be addressed to prevent backflow of ground water during high tides. An option to add a fourth pump station with associated discharge facilities will be evaluated and included in the final design if deemed necessary. The engineers will provide a summary of recommended improvements, comprehensive project cost schedules, complete bid package including plans and technical specifications for the proposed improvements. THE ADMINISTRATION RECOMMENDS ADOPTING THE RESOLUTION. Advisory Board Recommendation: N/A Financial Information: Source of M '. *O ,it--,:. : OiiiiC Funds: i ' $81,921 Stormwater Projects Line of Credit approved by the City Commission in May 2009, with such funds to be r, repaid from proposed Future Stormwater Bonds 1 r • - PI . Financial Impact Summary: N/A City Clerk's Office Legislative Tracking: Fernando Vazquez, City Engineer, ext.6399 Sign Offs n06r . 4. gy COY FHB JGG _/! JMG ,5 T:WGENDA\2011\2 \Drainage - Sunset Harbour summary.. .c 0 MIAMJBEACH AGENDA ITEM C-1 DATE o2 -9 -1( A_ MIAMI BEACH City of Miami Beach, 1700 Convention Center Drive, Miami Beach, Florida 33139, www.miamibeachfl.gov COMMISSION MEMORANDUM TO: Mayor Matti Herrera Bower and Members of the City Commission FROM: Jorge M. Gonzalez, City Manager DATE: February 9, 2011 f _ SUBJECT: A RESOLUTION OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH, FLORIDA, APPROPRIATING FUNDS IN THE AMOUNT OF $81,921, FOR CONSULTING SERVICES FOR THE SUNSET HARBOR STORM WATER SYSTEM, WITH FUNDING FROM FUND 429, STORMWATER PROJECTS LINE OF CREDIT; WITH SUCH FUNDS TO BE REPAID FROM PROPOSED FUTURE STORMWATER BONDS FOR THE SUNSET HARBOR PUMP STATION UPGRADES PROJECT. ADMINISTRATION RECOMMENDATION Adopt the Resolution. FUNDING Funding for this task, in the amount of $81,921, needs to be appropriated from Fund 429, Stormwater Projects Line of Credit; with such funds to be reimbursed from proposed future stormwater bonds for the Sunset Harbor Pump Station Upgrades project. BACKGROUND In Fiscal Year 2010/2011, the City created a capital project entitled Sunset Harbor Pump Station Upgrades. This project allows City staff to address an identified storm water problem and to construct the necessary improvements to provide a five -year, one -day level of service. ANALYSIS The original drainage system serving Purdy Avenue and Sunset Harbor Drive (20 Street) consisted of three (3) outfalls, one each located at Gibbs Park (south outfall), the Marina (middle outfall) and Publix (north outfall on Sunset Harbor Drive). Subsequently, Public Works Operations found a fourth outfall, interconnected with a small exfiltration trench system at the intersection of Purdy Avenue and Sunset Harbor Drive. These outfalls discharged to Biscayne Bay or the canal separating Sunset Harbor and Sunset Island IV. In 1994, the capacity of these gravity outfall lines were augmented by the construction of gravity drainage wells, connected directly to each outfall line. Attachment A provides a depiction of the original drainage configuration. In 1999, an engineering analysis determined that the effectiveness of these gravity systems were inadequate to handle storm water runoff in the area, as the volume of runoff increased significantly by the construction of the towers at 1800 and 1900 Sunset Harbor Drive. Temporary flooding conditions were evident after most storms of any magnitude, and conditions were exacerbated when storm events coincided with high tides. The 1999 engineering analysis found that the capacity of the gravity drainage wells had diminished over the years as a result of debris collecting within the wells since no provisions to intercept foreign debris was provided in Commission Memorandum - Sunset Harbor Pump Station Upgrades February 9, 2011 Page 2 of 3 the original design as part of the inlet structures channeling storm water to the well systems. The measured elevations of the gravity well influent structures, outfall inverts and road grades were such that flooding conditions in the right -of -way occurred even before the gravity systems became operational. The consultant recommended four modifications that would improve the storm water system. The first recommendation was installing three - chamber pollution control structures over the drainage wells. These structures would prevent sediment from entering the wells and prevent water from back - flowing into the streets. The second recommendation was to lower the invert elevations of the drainage wells in order to allow water to enter the wells before the streets would flood. The third recommendation was lowering the outfall inlets so that they would begin to operate after the drainage wells but before the streets flooded. The fourth recommendation was to redevelop the drainage wells to restore their original intake capacity. The Miami -Dade County Department of Environmental Resource Management (DERM) reviewed these recommendations and found them to be acceptable. The 1999 analysis also stated that pumps might be required if street flooding continued to be a problem. The recommended improvements were completed in 2003. In addition to the recommended modifications of the existing system, one duplex pilot pump station was constructed at Outfall No. 2 (adjacent to the Marina). In 2007, duplex pump stations were added at Outfalls No. 1 and No. 3 (Gibbs Park and Publix, respectively). The gravity drainage wells were originally designed to discharge approximately 750 gallons per minute (gpm). Installation of the pump stations increased the discharge rate five -fold to approximately 4,000 gpm. Both DERM and the Florida Department of Environmental Protection (FDEP) permitted the work. FDEP included a requirement to include a passive bypass of the pumping system to limit the discharge rate to the wells, which was not part of the original design. Passive bypass systems consist of non - mechanical safety components that limit maximum allowable pressures in the discharge wells. Typically, passive bypasses are overflow pipes, orifice plates, or weirs. In 2010 the City installed the required passive bypass systems to bring the pump stations into compliance with the DERM and FDEP permits. The neighborhood still has three storm water issues. First, there remains insufficient discharge capacity to achieve the desired level of service. Second, there is inadequate conveyance (catch basins are too small and the streets are improperly graded) that limits the ability of storm water to reach the outfalls in a timely fashion. Third, there is backflow of ground water from the exfiltration trench at the northwest corner of the neighborhood that causes localized flooding during high tides. These mechanical and piping issues still lead to temporary street flooding that is exacerbated during periods of high tide. In conjunction with the Citywide Storm Water Master Plan, a new model has been developed of the existing system, and it has been calibrated to mimic current conditions. The model was run numerous times with different storm intensities and durations. The modeling confirmed flooding that overtops the sidewalks and has provided guidance on the measures needed to provide an adequate level of service. The outfalls were televised and found to be in good condition further confirming that the remaining issues are systemic and not related to maintenance. Staff negotiated with a pre - qualified engineering firm to develop a proposal for a retrofit design to augment the capacity of the Sunset Harbour drainage system to meet a five -year, one -day level of storm water service. The proposal is provided as Attachment B. In the retrofit design, the City is planning improvements to provide redundancy and additional discharge capacity. To this end, improvements may include interconnecting the basins, upsizing the pump stations to accommodate larger contributing areas, construction of new drainage wells along with the Commission Memorandum - Sunset Harbor Pump Station Upgrades February 9, 2011 Page 3 of 3 redevelopment of the existing drainage wells to provide greater discharge capacity. Weirs and detention boxes will be provided to meet the requirements of the various regulatory agencies. The City will also mill and resurface the streets in the neighborhood, adjusting grades to provide better storm water conveyance and to reduce ponding. The problematic exfiltration trench will be addressed to prevent backflow of ground water during high tides. An option to add a fourth pump station with associated discharge facilities will be evaluated and included in the final design if deemed necessary. Under this proposal, the engineers will provide a summary of recommended improvements, comprehensive project cost schedules, and a complete bid package including plans and technical specifications for the proposed improvements. The engineering study will be comprehensive, addressing all drainage basins within the Sunset Harbor neighborhood. After Commission approval of this resolution, it is anticipated that construction plans will be completed and permitting of the work approved by June 2011. Should the City then utilize the JOC system to procure a contractor, it is estimated that construction could be completed in the first quarter of calendar year 2012. CONCLUSION The Administration recommends adopting this resolution to appropriate funds, in the amount of $81,921, for the design and permitting of the stormwater improvements for the Sunset Harbour Neighborhood, with funding from Fund 429, Stormwater Projects Line of Credit; with such funds to be repaid from proposed future stormwater bonds. Attachment: A: Map of Sunset Harbor Drainage Basins B: APCTE Proposal JMG /JGG /FHB /HDC /FV T:\AGENDA\2011\2 -09 -11 \Drainage - Sunset Harbour memo.doc �rrr. J er 6x4 o f 3/11117 J.I4 AND .U! ,SUNSeFyik. — -- -----7 __tea 0144,,,,, . . .., ,,. ,,, . ..„, f , * 9 , 4 . t3 , , , : * , . . 11 , 1 ■ 1 41 Y. i / v / y �_ . -_ _ - 1 4111k 4 iv i ) . fq, '' lk: . :44" : J / I N ON1 t ' _ ter. R- ■ i ' 1 .1� Q CZ #! ' '""� 1 1,1 ,° i y. ,lydais 'fi qtr A I :: '�g`< r .i tt� 9. r to 71 • • . 7r! 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ILI m k / k 2 / @ 2 R _ E i / § e C1) `\ k / f CO 0 2 & -0 \ $ k=} O �) - m « ( E � } a < k Ili & \ ƒ 0 } ® 6 7 a) \ /$ \k < @7 /j CO �& \ \ < R J < R o = / ~ 2 k .: ¥ = e I 1 G ia C.L. w — co ■ 2 = co d i / / u) _1 k b w f 0. k E D 2 CO o 2 § _ it ƒ _ 0 CO 0 CS % T j < U. \ @ £ < / / P- c) < >- m U) > m < k $ a § 0 2 m [ 0 2 b c en 0 < \ \ 0 _ \ / / a > / \ o / / I-- .- n / 1 » , Land Surveyors H A D O N N E Mappers GPS / GIS Services Subsurface Utility Surveyors Sunday, January 23, 2011 VIA EMAIL: aalfonso @APCTE.com CM6il @APCfE.com shftsrv1- 23- 11.docx Submitted to: Attn: Mr. Arnelio Alfonso, P.E. i Senior Project Manager r -}- A &P Consulting Transportation Engineers, Corp. _.,� _ t. t 10305 N.W. 41 Street, Suite 115 Doral, Florida 33178 In reference to: Surveying Services for the area outlined in the attached (Exhibit "A"), located in City of Miami Beach, Florida. Dear Mr. Alfonso: Pursuant to your request regarding a fee estimate for surveying and mapping services for the above referenced project. HADONNE CORP (HC) is pleased to submit the following proposal for your consideration: Section 1) Scope of Services: HC will perform a full Topographic Survey; the survey will include the following information: • All pavement, curb and gutter. • Right -of -Way (ROW) and Property Lines (PL) for project area and adjacent properties. • Location of all overhead utilities, signs, manholes, catch basins, valves /valve boxes or other fixed improvements in the project area including elevations. • Invert and grate elevations for all project area storm, sanitary manholes and catch basins. • Elevations at edge of pavement, top of curb, center of pavement and edge of ROW and /or fence line (cross sections) every 100' at a minimum and at any visible high or low points along the road. • Additionally, provide elevations no less than 100' apart along all ROW boundaries and /or fence line up to 50' from the edge of pavement. • Location and As -Built of all Outfalls within the project area. Section II) Deliverables:. HC will deliver three (3) sets of signed and sealed plans 24" x 36" at a scale no smaller than 1" / 50' and an electronic copy of the resulting DWG file. Section III) Proiect area. length. Size and location: See attached (see Exhibit "A "). Section IV) Schedule of Fees: Dade Boulevard 17.53% $3,856.62 Purdy Avenue 17.54% $3,859.40 20th Street 12.67% $2,786.57 18th Street 12.67% $2,786.57 Alton Road 10.42% $2,293.35 West Avenue 13.15% $2,892.46 Bay Road 16.02% $3,525.02 The Total Fees to complete the entire project shall be a lump sum of $22,000.00 Section V) Time of Completion: HC has estimated thirty calendar days to complete this project. Section VI) Year 2011 hourly Rates (loaded hourly rates): Two Persons Survey Party $90.00 per Hour Two Persons Survey Party with GPS equipment $135.00 per Hour Three Persons Survey Party with GPS equipment $155.00 per Hour Three Persons Survey Party $110.00 per Hour Office Computer Drafter $55.00 per Hour Office Survey Technician $60.00 per Hour Professional Surveyor in charge (Project Surveyor) $100.00 per Hour HADONNE 1 1985 NW 88th Court • Suite 202 • Doral, FL. 33172 • ph.: 305.266.1188 • fax: 305.207.6845 • www.hadonne.com • LB7097 HC PAGE 2 OF 2 HADONNE shftsrv1- 23- 11.docx Section VII) Qualifications: County and /or Municipality Fees are not included in this Proposal and are the Client's responsibility. (Rule of Law: All field and office efforts in connection with this project will be performed in strict accordance with the applicable provisions of the "Minimum Technical Standards for Land Surveying in the State of Florida ", pursuant to Rule 61G17 -6 Florida Administrative Code. IRequests for service not specifically enumerated in this Proposal will be addressed via separate response if so required and an additional charge will apply per HC's hourly rates for calendar year 2010, which are set forth in the "Estimate Fee" section of this Proposal. IAII survey work to be done in U.S. feet, elevations to be reference to National Geodetic Vertical Datum of 1929 (NGVD 1929). 'Our ability to perform is and will be completely influenced by the Client's ability to make the site available and to eliminate any and all conditions that may interfere with HC's ability to furnish services, and weather conditions. IHC will require a 24 hour, prior written notice before field work can be performed. This notice should be sent via facsimile or email to HC. IThis Proposal does not include any permit fee nor plans processing fees assessed by the applicable government agency. IThis Proposal does not include construction inspections or certifications for construction completion. IHorizontal control points shall be referenced to the Florida State Plane Coordinate System, North American Datum of 1983 adjusted 1990 (NAD83 /90). All work to be performed in U.S. feet. (Client shall be aware that GPR Technology is not 100% accurate. Depending on factors such as and not limited to: soil type, soil moisture, size of underground utility, type of underground utility, depth of underground utilities; some utilities may not be detected by GPR. GPR will detect the presence of the utility but not the type. the client will do its best to identify the type of utility but it may occur that some detected utility remain unidentified. Area to be located with GPR should be clean without mayor vegetation, debris or any structure that may prevent the use of the equipment. Cleaning, removing of debris or vegetation is not included in this proposal. Section VIII) Payments Terms: Payment is due for HC's completion of each task UPON RECEIPT of HC's Invoices. Ilt is understood that this Proposal is entered into between HC and the Client. IHC's failure to strictly enforce any provision in this Proposal shall NOT be construed as a modification or amendment of the Proposal's terms, specifically these payment terms, unless otherwise agreed to in writing by HC. IHC's receipt of this Proposal, signed by Client, constitutes Client's acceptance of these terms, and HC's Standard Terms and Conditions (collectively the "Contract "), which is attached and incorporated by reference as if fully set forth here. The Client's signature shall also constitute a notice for HC to proceed with its Scope of Services. IIn the event HC is required to enforce any terms of the Contract, Client agrees to pay to HC all reasonable attorneys' fees and costs incurred, whether suit is filed or not, including attorneys' fees on appeal. IPast due payments under this Proposal are subject to a 1.5% interest per month. IFor special consideration, the Client agrees that HC's liability for this Project, irrespective of the cause, shall be limited to the amount of the Professional Fees Client actually pays to Client. I Both HC and the Client may terminate this Proposal after ten (10) days written notice, and upon Client's payment to HC of all outstanding fees and expenses incurred by HC through the date of such written notice. By signing below I APPROVE AND ACCEPT this letter as a legal contract and read and agree to the payment terms as set forth above. By: Date: (Authorized Signature) I Title: (Typed or printed name) I thank you for this opportunity to present this proposal for your consideration and look forward to your favorable response. In the interim, if there is anything we can do to be of service in this or any other matter, please do not hesitate to call me directly at 305.266.1188. Sinc�rel yours, J 4. ..- Abraham H - dad, PSM /President HADONNE 1 1985 NW 88th Court • Suite 202 • Doral, FL. 33172 • ph.: 305.266.1188 • fax: 305.207.6845 • www.hadonne.com • LB7097 z I a , , 4 A - Jetier Ave A.- 3 .� ! � r g Q 2. y1�^^y* MRfI r chcg� v 4Ir �, ■ .,"' - ' - ,""n! , t 4'4)4, �. it ," A? Lite* * " Lenox „ Ave ;14. � BiN �' .. CFA '4 0..�. . ....,...,4, I' 4 4, :. ,.E ... € 't ' ° „ :.....�.b. ,...,. 4 ' L " am# : ii � , ,.., ''' 4 .L.. ' :1'.---- ,„ - ,, 44 4A °` - it, ,144 st#, „.,- ,, �" v o Ave -�* � � • � * ' i ' - 4 : '4 : 11 _10 '*%°- N '40' ,''‘'''''''' .44 '''":'''''' • I!' Q x AYe _ _ - g r ..„. 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