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Home My WebLink About2013-139 07 A a l3 1 a . �-• 0 WORK ORDER NUMBER 2 Cl OYSTER REEF PILOT PROJECT For NUTRIENT REMOVAL AND HABITAT RESTORATION This Work Order Number 2 is entered into as of this 16th day of July , 2013 , pursuant to that certain Continuing Contract Agreement for Professional Services entered into as of November 15, 2011 ("Agreement") , by and between Indian River County, a political subdivision of the State of Florida ("COUNTY" ) and Ecotech Consultants Inc. ("CONSULTANT" ). The COUNTY has selected the CONSULTANT to perform the professional services set forth on Attachment 1 , attached to this Work Order and made part hereof by this reference . The CONSULTANT will perform the professional services for the fee schedule set forth in the proposal dated July 09 , 2013 , attached to this Work Order and made a part hereof by this reference . Pursuant to paragraph 1 .4 of the Agreement, nothing contained in any Work Order shall conflict with the terms of the Agreement and the terms of the Agreement are incorporated in each individual Work Order as if fully set forth herein . IN WITNESS WHEREOF , the parties hereto have executed this Work Order as of the date first written above . ECOTECH BOARD OF COUNTY COMMISSIONERS CONSULTANTS , Inc. OF INDIAN RIVER COUNTY Bya C' � • By seph E . F escher, Chairman Title : f RAS Attest: Jeffrey R. Smith , Clerk of Court and Comptroller Xvv\SSIONt�S "��4 ' By see Deputy Clerk : o ; : � proved . s i y ** 4 ' os aird , County Ad nistrator °n°annnnn" "° " /Approved as to form and legal sufficiency . ylan Reingold , County Attorney Page 1 of 1 r Ecotech ATTACHMENT 1 Consultants, Inc. ENVIRONMENTAL SCIENCES & ENG/NEER/NG 09 July 2013 Mr. Vincent Burke Utility Director Indian River County 1801 27th Street Vero Beach, Florida 32960 RE : Pilot Oyster Reef Project for Nutrient Removal and Habitat Restoration Dear Mr. Burke : Presented below is our proposal to permit and construct an oyster reef in the Indian River at a location adjacent to the northeast corner of the Spoonbill Marsh. The Indian River Lagoon (Lagoon) is one of the most diverse coastal ecosystems in the continental U. S . Recent changes in the density and distribution of seagrass communities have negatively affected potential habitat and refugia for select invertebrates and juvenile fish species in the Indian River (River) section of the Lagoon between the C .R. 510 Bridge and the S .R. 60 Bridge. Such changes, if persistent, may eventually negatively influence fisheries in this section of the River. Changes in water quality conditions may be linked to decreased seagrass occurrence between the two bridges . Indian River County (IRC) constructed the Spoonbill Marsh (SBM) in part to remove nutrients directly from the River. This nutrient removal is accomplished by pumping water from the River to a static mixer on the SBM site where it is blended with demineralization concentrate from the North County Water Treatment Plant and then discharged into SBM. The blended water then flows through the SBM and eventually back into the River. An oyster colony has been developing in SBM since the project went on -line in August 2010 . Water quality conditions in the River have had no negative effect on the oyster population in SBM, In fact, oyster are now distributed throughout the SBM and provide potential habitat and refugia for many invertebrate and juvenile fish species. SBM now supports a significant population of Snook, Red Drum, Mangrove Snapper, and blue crabs . This project proposes to construct a small oyster reef in the River that would be similar to the one developing in the SBM . The oyster reef in the SBM has not been negatively affected by the water quality conditions in the River over the past two years. Therefore, the proposed oyster reef is not expected to be influenced by similar water quality conditions . P. O. Box 690265 • Vero Beach, Florida 32969 • (407) 466=6989 r Mr. Vincent Burke 09 July 2013 Page 2 The purpose of the proposed oyster reef is to improve water quality conditions in the Indian River and to provide potential habitat and refugia for invertebrate and juvenile fish species . The occurrence of these species within the boundaries of the oyster reef is expected to attract larger game fish to the site. The proposed oyster reef also is expected to remove nutrients from the River and from the FDOT ditch discharging to the River at a point adjacent to the northeast corner of the SBM site The proposed oyster reef would be approximately 0.25 acres (0 . 10 Ha.) in size and located just to the northeast of SBM off the end of the FDOT ditch located along the northern boundary of SBM, see Figure 1 . The base of the oyster reef will be formed by 2 .0 ft. by 4 . 0 ft. 18 gauge wire mesh panels that will be pinned to the sediments. Concrete rubble will be stacked on top of the wire mesh base. The size concrete rubble will generally range from 0 . 5 ft. to 2 . 0 ft. pieces that will be hand stacked to form discrete clusters that range in size from approximately 4 . 0 if to 25 ft' in diameter. The clusters will be randomly interspersed through the project area with approximately 2 . 0 ft. to 2 . 5 ft. of bare sand between the clusters, see Figure 2 . The four corners of the oyster reef will be marked using buoys or 2 . 0 inch PVC pipe with reflective tape and labeled as "Indian River County Oyster Reef Project Area". The oyster reef will be located at a point off-shore that will maintain 8 . 0 inches of water over the reef at low tide . The oyster reef will be located in an area that has been monitored since 2008 . Seagrass has not been found in this area since 2008 , and was not present when the site was inspected in June 2013 . The River bottom at the proposed oyster reef site is nearly level and is composed of fine sands intermixed with organic accumulations. There are no noticeable significant benthie structures or communities present within the project area. Therefore, the proposed oyster reef will not affect significant existing benthic resources or fishery habitat. This project will include three tasks . The first task will include preparation of the St. Johns River Water Management District and U. S . Army Corps of Engineers permit applications . The second task will include construction of the oyster reef. The third task will include follow-up monitoring of the oyster reef. This monitoring will include estimating the colonization rate and growth rates of the oysters and other select sessile macroinvertebrates on the reef, and the presence of juvenile fish species within the reef. The monitoring also will include estimating the total nitrogen and total phosphorus uptake rate per square meter of reef area. This estimate will be based on water quality sampling and analysis of nutrient storage in three different age classes of oyster found on the reef. The County will be responsible for all laboratory costs associated with the estimation of these uptake rates . Mr. Vincent Burke 09 July 2013 Page 3 The cost to complete the three tasks listed above will be $28,500 . 00. The County will be responsible for permit fees . Please contact our office at 407 .466 . 6989 if you have questions or need additional information regarding the above proposal. Sincerely, ECOTECH CONSULTANTS , INC . C .E . Swindell, Jr. President F _ „. , Cry All 12 . . ,, . V1 Ally � r � } .. fi\; ! q. I. .� S ._ � ! fI A yd 4 At W ig 1) r,J } VIA r ! t - C. r • � , .. r .ry l . ,� tLl �r rx G A 1 • ') d )41 All f � z . . 9 .i . ,.` 7 I `itL L If r Sq Ay i"LN 11 4 1 � fi .. , ; 1 \ r fly �' . ..e 'offL 01 f iv fit f VOL %� .. , sl rA 11 11 {,� 0 IL h Rt iNV 6 AIr 7 t ir ` It �l" All: V i k �.Lx ' IV 11 KY �P' S. oL Oto _ _ V ' .. } :? - l - . { i . 4 1, r General location of the proposed oyster reef in the 1 Figure 2 CORNER POST 2 " PVC WITH REFLECTIVE TAPE ( 4 ) REQUIRED WIRE BASE - WIRE MESH PANELS 2 ' x4 ' - 18 GA , PINNED TO BOTTOM OF DESIGNATED REEF AREA , CONCRETE RUBBLE TO BE PLACED ON TOP OF OYSTER REEF WIRE BASE 150 ' 150 OYSTER REEF 75 1L250 SQ , FT , 1 / 4 ACRE 75 ;r INDIAN RIVER CONCRETE RUBBLE 6 " TO LAGOON 40 ' 24 " PIECES . HAND STACK SHORELINE IN CLUSTERS 80 BELOW LLL WATER SURFACE WITHRz OPEN SPACE ❑ F 24 ° TO30 " BETWEEN CLUSTERS . CLUSTERS VARY IN SIZE 2 ' T ❑ 5 ' . mw D , O , T , DITCH OYSTER REEF FOR TMDL - HABITAT RESTORATION NO SCALE _ - - MAY 2013 -ART-