Project_Plans.pdf

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FOREBAY DREDGING AT CENTER SPRINGS POND
Solicitation number
25/26-27
Issued by
Hartford County, Connecticut

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Project Plans for Forebay Dredging at Center Springs Pond

This is a project plan document prepared by the Town of Manchester, Connecticut Public Works Department Engineering Division for forebay dredging work at Center Springs Pond. The project involves the removal of approximately 750 to 1,000 cubic yards of accumulated sediment from within the sediment forebay, along with installation, maintenance, and removal of erosion and sedimentation controls, water handling, forebay dewatering, installation of a riprap berm, and incidental restoration work. The project is located at Center Springs Pond in Manchester, Connecticut, and construction access is restricted to the north shore area only, with no disturbance permitted within five feet of the eastern and southern shoreline. All work must be completed by March 1, 2026, and contractors are required to work continuously once mobilized on the project site. The sealed bid submission deadline is 2:00 pm on Tuesday, December 9, 2025, via the Town's eProcurement Portal, with a question submission deadline of December 5, 2025 at 4:00 pm. The bid opening will be conducted virtually via Zoom, and the anticipated contract award is approximately two weeks after bid opening.

The project must comply with the Town of Manchester Public Improvement Standards effective October 31, 2020, as amended, and the Connecticut Department of Transportation Standard Specifications for Roads, Bridges, Facilities and Incidental Construction (Form 819, 2024). Contractors are required to submit a 5% bid bond, bidder qualifications and references, a non-collusion affidavit, and a conflict of interest statement. The project is subject to prevailing wage requirements under Connecticut General Statute 31-53 specific to dredging classifications, and contractors must complete a Living Wage Certification Form in compliance with the Manchester Living Wage Ordinance. Performance and labor/materials payment bonds, each equal to 100% of the contract price, are required, and all workers must complete a 10-hour OSHA Construction Safety and Health Course. Prior to construction, the Town will lower the main pond elevation to just below the gabion weir wall elevation of 143.0 feet, after which the contractor assumes responsibility for pumping out the sediment forebay. Temporary dewatering, settling basins, silt fencing, and haybale erosion controls must be installed and maintained throughout construction, with all disturbed grassed areas restored with topsoil, fertilized, and seeded upon project completion.

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TOWN OF MANCHESTER

P U B L I C W O R K S D E P A R T M E N T

E N G I N E E R I N G D I V I S I O N

FOREBAY DREDGING

AT CENTER SPRINGS POND

NOVEMBER 2025

PROJECT LOCATION

PROJECT AREA

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HOP

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RIVER

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HOCKANUM

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CENTER SPRINGS POND

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MIDDLE TURNPIKE WEST

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BROAD STREET

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WEST CENTER STREET

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EAST CENTER STREET

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MAIN STREET (RTE 83)

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ALPINE

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LIBERTY

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HEMLOCK

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HAWTHORNE STREET SOUTH

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NEWMAN

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CENTER SPRINGS POND

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DESIGN STANDARD :

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TOWN OF MANCHESTER PUBLIC IMPROVEMENT

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STANDARDS, EFFECTIVE DATE OCTOBER 31, 2020,

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PLAN: 1" = 20'

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OTHER SCALES AS NOTED

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DATUMS :

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STANDARD SPECIFICATIONS :

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SEE CONTRACT DOCUMENTS

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%%USITE MAP

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%%ULOCATION MAP

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GRID

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GRID

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AS AMENDED

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LIST OF DRAWINGS

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SHEET NO.

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DESCRIPTION

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COVER SHEET

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SITE PLAN AND NOTES

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HORIZONTAL DATUM: TOWN OF MANCHESTER CONTROL NETWORK

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(NAD83 AS ESTABLISHED IN 1998)

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VERTICAL DATUM: TOWN OF MANCHESTER CONTROL NETWORK

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(NAVD88 USING GEOID 96)

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DETAILS

2025093

99 EDGERTON STREET

MANCHESTER, CT

FOREBAY DREDGING AT

CENTER SPRINGS POND

TOWN OF MANCHESTER

PUBLIC WORKS DEPARTMENT

ENGINEERING DIVISION

of 3

SF

SITE PLAN

2025093-PLAN.DWG

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2:1 SLOPE WITH MODIFIED RIPRAP SEE DETAIL

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PROPOSED FINISH GRADE AFTER SEDIMENT REMOVAL

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TEMPORARY SEDIMENT DEWATERING AREA RESTORE DISTURBED LAWN AREA UPON COMPLETION

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REMOVE ACCUMULATED SEDIMENT WITHIN EXISTING FOREBAY

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DEWATERING PIPE

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DEWATERING PUMP

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SETTLING BASIN

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PZC APPLICATION

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MR

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494 MAIN STREET - P.O. BOX 191 MANCHESTER, CT 06045-0191

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FILENAME

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PROJECT NUMBER

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FILE

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DATE

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NO.

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DRAWN BY:

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HORIZONTAL: NAD83 VERTICAL: NAVD88

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LEGEND

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= PROPERTY LINE

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= SANITARY MANHOLE

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= CULVERT END

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BID DOCUMENTS

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JL

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OR AS NOTED

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MAGNETIC

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1. ALL MATERIALS AND METHODS OF CONSTRUCTION SHALL BE IN ALL MATERIALS AND METHODS OF CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE "MANCHESTER PUBLIC IMPROVEMENT STANDARDS", EFFECTIVE OCTOBER 31, 2020, AS AMENDED AND THE AND THE STATE OF CONN. DEPT. OF TRANSPORTATION STANDARD SPECIFICATIONS FOR ROADS, BRIDGES, FACILITIES AND INCIDENTAL CONSTRUCTION, FORM 819, DATED 2024, INCLUDING ANY SUPPLEMENTS. . 2. IMPLEMENTING WORKER SAFETY AND HEALTH PROTOCOLS THAT ADDRESS IMPLEMENTING WORKER SAFETY AND HEALTH PROTOCOLS THAT ADDRESS COMPLIANCE WITH ALL RULES, LAWS AND REGULATIONS REGARDING SAFETY AND RISK OF EXPOSURE TO PHYSICAL AND CHEMICAL HAZARDS IS THE SOLE RESPONSIBILITY OF THE CONTRACTOR. ALL EMPLOYEES OF THE CONTRACTOR AND SUBCONTRACTORS ARE TO WEAR REFLECTIVE VESTS AND HARD HATS AT ALL TIMES WHEN ON THE PROJECT SITE. 3. HORIZONTAL AND VERTICAL LOCATIONS OF PROPOSED WORK MAY BE HORIZONTAL AND VERTICAL LOCATIONS OF PROPOSED WORK MAY BE ADJUSTED TO FIT EXISTING FIELD CONDITIONS WITH THE APPROVAL OF THE ENGINEER. 4. THE CONTRACTOR SHALL COMMIT SUFFICIENT RESOURCES TO THE THE CONTRACTOR SHALL COMMIT SUFFICIENT RESOURCES TO THE PROJECT TO ENSURE THE PROJECT IS COMPLETED WITHIN THE ALLOTTED CONTRACT TIME. ONCE MOBILIZED, THE CONTRACTOR SHALL WORK CONTINUOUSLY ON THE PROJECT UNTIL COMPLETION. ANY UNAUTHORIZED VACATING OF THE JOBSITE IS SUBJECT TO PENALTIES DESCRIBED UNDER THE “LIQUIDATED DAMAGES” SECTION OF THE LIQUIDATED DAMAGES” SECTION OF THE SECTION OF THE CONTRACT SPECIFICATIONS. 5. ALL ELEVATIONS ARE BASED ON THE TOWN OF MANCHESTER CONTROL ALL ELEVATIONS ARE BASED ON THE TOWN OF MANCHESTER CONTROL NETWORK. EXISTING INFORMATION SHOWN ON THESE PLANS WAS OBTAINED FROM TOWN OF MANCHESTER GIS DATA AND LIMITED FIELD SURVEY; AND THEREFORE, IS CONSIDERED APPROXIMATE. THE CONTRACTOR SHALL IMMEDIATELY NOTIFY THE ENGINEER IF CONDITIONS ENCOUNTERED IN THE FIELD ARE DIFFERENT THAN INFORMATION SHOWN ON THE PLANS. LIMITS OF NEW WORK SHALL BE STAKED IN THE FIELD PRIOR TO CONSTRUCTION WHERE APPROPRIATE. 6. THE CONTRACTOR IS RESPONSIBLE TO OBTAIN ALL REQUIRED PERMITS THE CONTRACTOR IS RESPONSIBLE TO OBTAIN ALL REQUIRED PERMITS AND PAY ASSOCIATED FEES PRIOR TO ANY CONSTRUCTION ACTIVITY. 7. ALL WORK SHALL BE CONDUCTED IN ACCORDANCE WITH THE INLAND ALL WORK SHALL BE CONDUCTED IN ACCORDANCE WITH THE INLAND WETLANDS PERMIT AND FLOODPLAIN PERMIT ISSUED BY THE AND FLOODPLAIN PERMIT ISSUED BY THE ISSUED BY THE MANCHESTER INLAND WETLANDS COMMISSION, WHICH WILL BE PROVIDED AT THE PRE-CONSTRUCTION MEETING. 8. A PRECONSTRUCTION MEETING WITH TOWN STAFF IS REQUIRED PRIOR TO A PRECONSTRUCTION MEETING WITH TOWN STAFF IS REQUIRED PRIOR TO THE START OF ANY CONSTRUCTION ACTIVITY. 9. NO WORK SHALL COMMENCE UNTIL ALL TEMPORARY FENCING AND NO WORK SHALL COMMENCE UNTIL ALL TEMPORARY FENCING AND BARRICADES ARE IN PLACE. 10. THE EXISTENCE OF UTILITIES AND APPURTENANCES AS SHOWN ON THE EXISTENCE OF UTILITIES AND APPURTENANCES AS SHOWN ON THESE DRAWINGS ARE FOR REFERENCE ONLY. THE EXACT SIZE, LOCATION, TYPE, AND ELEVATION OF ALL UTILITIES WITHIN ALL WORK AREAS SHALL BE THOROUGHLY INVESTIGATED BY THE CONTRACTOR PRIOR TO THE START OF CONSTRUCTION. THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING "CALL-BEFORE-YOU-DIG" AT 1-800-922-4455 AND MUST HAVE ALL UTILITIES MARKED ON THE GROUND PRIOR TO THE START OF CONSTRUCTION. 11. SURPLUS EXCAVATED AND DREDGED MATERIAL SHALL BECOME THE SURPLUS EXCAVATED AND DREDGED MATERIAL SHALL BECOME THE PROPERTY OF THE CONTRACTOR. THE CONTRACTOR SHALL DISPOSE OF SURPLUS EXCAVATED MATERIAL IN ACCORDANCE WITH STATE AND FEDERAL REGULATIONS. 12. THE CONTRACTOR SHALL SUBMIT A PLAN TO THE ENGINEER FOR THE CONTRACTOR SHALL SUBMIT A PLAN TO THE ENGINEER FOR PROPOSED METHODS TO DEWATER THE SITE (WHERE REQUIRED). SUCH PLAN SHALL INCLUDE THE INSTALLATION OF SILT BAGS AT PUMP DISCHARGES WITH SILT FENCE/HAYBALES FOR EROSION CONTROL. PROPOSED DISCHARGE LOCATIONS AND ALL EROSION CONTROLS SHALL BE REVIEWED AND APPROVED BY THE ENGINEER PRIOR TO CONSTRUCTION. 13. THE CONTRACTOR SHALL BE RESPONSIBLE FOR TEMPORARY HANDLING THE CONTRACTOR SHALL BE RESPONSIBLE FOR TEMPORARY HANDLING OF ALL STORMWATER RUNOFF DURING CONSTRUCTION. METHODS OF HANDLING RUNOFF SHALL BE APPROVED BY THE ENGINEER. 14. ALL SEDIMENT CONTROL SYSTEMS SHALL MEET THE "GUIDELINES FOR ALL SEDIMENT CONTROL SYSTEMS SHALL MEET THE "GUIDELINES FOR SOIL EROSION AND SEDIMENT CONTROL" AS PREPARED BY THE CONNECTICUT COUNCIL ON SOIL AND WATER CONSERVATION, LATEST REVISION. THE CONTRACTOR IS RESPONSIBLE FOR THE INSTALLATION, MAINTENANCE AND REPAIR OF EROSION CONTROLS REQUIRED FOR THE PROJECT. ADDITIONAL EROSION CONTROLS SHALL BE INSTALLED BY THE CONTRACTOR FOR TEMPORARY STOCKPILING OF EXCAVATED MATERIAL AND WHERE DEEMED NECESSARY BY THE ENGINEER. EROSION CONTROLS SHALL REMAIN IN PLACE AND BE MAINTAINED BY THE CONTRACTOR UNTIL THE SITE IS STABILIZED AND THE ENGINEER APPROVES THEIR REMOVAL. 15. ALL GRASSED AREAS DISTURBED BY THE CONTRACTOR SHALL BE ALL GRASSED AREAS DISTURBED BY THE CONTRACTOR SHALL BE REPLACED WITH TOPSOIL, FERTILIZED AND SEEDED AS PER THE SPECIFICATIONS. CONTRACTOR SHALL MAKE ALL EFFORTS TO MINIMIZE THE LIMITS OF DISTURBANCE AND ASSOCIATED RESTORATION THAT IS REQUIRED. 16. ALL WORK WITHIN THE FOREBAY SHALL BE CONDUCTED DURING DRY ALL WORK WITHIN THE FOREBAY SHALL BE CONDUCTED DURING DRY WEATHER CONDITIONS, WHEN DRY WEATHER IS FORECASTED AND WITH MINIMAL FLOW IN THE BROOK. 17. THE CONTRACTOR SHALL CONTINUOUSLY MONITOR WEATHER FORECASTS THE CONTRACTOR SHALL CONTINUOUSLY MONITOR WEATHER FORECASTS DURING CONSTRUCTION. IF THE ENGINEER DETERMINES A SIGNIFICANT WEATHER EVENT IS FORECASTED, THE CONTRACTOR SHALL IMMEDIATELY REMOVE THE DIVERSION MEASURES, PUMP AND SETTLING BASIN AND TEMPORARILY RE-STABILIZE THE BROOK UNTIL THE INCREASED FLOWS SUBSIDE. 18. PRIOR TO CONSTRUCTION, THE TOWN WILL LOWER THE MAIN POND PRIOR TO CONSTRUCTION, THE TOWN WILL LOWER THE MAIN POND ELEVATION TO JUST BELOW THE GABION WIER WALL (±143.O). AFTERTHAT, THE CONTRACTOR WILL BE RESPONSIBLE FOR PUMPING OUT THE SEDIMENT FOREBAY TO BE ABLE TO COMPLETE THE WORK. 19. CONSTRUCTION ACCESS TO THE FOREBAY SHALL BE FROM THE NORTH CONSTRUCTION ACCESS TO THE FOREBAY SHALL BE FROM THE NORTH SHORE AREA ONLY. NO DISTURBANCE SHALL TAKE PLACE WITHIN 5' OF THE EASTERN AND SOUTHERN SHORELINE OF THE FOREBAY.

GENERAL NOTES::

2025093

99 EDGERTON STREET

MANCHESTER, CT

FOREBAY DREDGING AT

CENTER SPRINGS POND

TOWN OF MANCHESTER

PUBLIC WORKS DEPARTMENT

ENGINEERING DIVISION

of 3

SF

DETAILS

2025093-PLAN.DWG

SILT FENCE

N O T T O S C A L E

HAYBALE INSTALLATION

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PUMP SETTLING BASIN - TYPE 1

N O T T O S C A L E

MODIFIED RIPRAP FOR SLOPE STABILIZATION

NOT T O S C A L E

RESTORATION OF LAWN AREAS

N O T T O S C A L E

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PZC APPLICATION

AutoCAD SHX Text 09/16/25

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MR

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494 MAIN STREET - P.O. BOX 191 MANCHESTER, CT 06045-0191

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FILENAME

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PROJECT NUMBER

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FILE

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DATE

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NO.

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DRAWN BY:

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CHECKED BY:

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RELEASED BY:

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PROJECT LOCATION

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PROJECT TITLE

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SHEET TITLE

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SHEET NUMBER

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DATUM

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HORIZONTAL: NAD83 VERTICAL: NAVD88

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TB

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LEGEND

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= PROPERTY LINE

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GG

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= GAS GATE

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= SANITARY MANHOLE

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= DECIDUOUS TREE

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= CONIFEROUS TREE

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= LIGHT POLE

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CS

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= CULVERT END

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= CURB STOP

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= HYDRANT

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= CATCH BASIN

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WV

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BV

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BO

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= SIGN

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= WATER VALVE

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= DOUBLE POST SIGN

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= BUTTERFLY VALVE

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= BLOW OFF

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= DRAINAGE MANHOLE

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TV

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= CATV TUBE

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= TELEPHONE BOX

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= ELECTRIC BOX

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= CONTROLLER CABINET

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= BOLLARD

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= MAIL BOX

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= STONE WALL

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= GUIDE RAIL

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= RETAINING WALL

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= WIRE FENCE

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= IRON PIPE

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= UTILITY POLE

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= DRILL HOLE

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= CONTROL POINT

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= IRON ROD

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= CHAIN LINK FENCE

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= STOCKADE FENCE

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= GRANITE MONUMENT

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= CONCRETE MONUMENT

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= UTILITY POLE WITH LIGHT

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= TRAFFIC SPAN POLE

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= WETLANDS BOUNDARY

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= RAILROAD TRACKS

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= SILT FENCE

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= WETLAND FLAG

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BID DOCUMENTS

AutoCAD SHX Text 10/30/25

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JL

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%%UELEVATION

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%%USECTION

AutoCAD SHX Text NOTES: : 1. SEDIMENT CONTROL FABRIC TO BE A GEOTEXTILE MATERIAL TREATED TO RESIST DEGRADATION FROM EXPOSURE TO SUNLIGHT. 2. FOR EACH SPECIFIC USE, ONLY GEOTEXTILES ON THE CONNECTICUT DEPARTMENT OF TRANSPORTATION APPROVED LIST ARE TO BE USED. 3. AFTER FOLDING FABRIC EDGE, AFTER FOLDING FABRIC EDGE, BACKFILL TRENCH WITH ORIGINAL SOIL AND BUTTRESS THE SPLAY WITH MULCH OR LEAF LITTER.

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ATTACH GEOTEXTILE TO POSTS WITH STAPLES OR PER THE MANUFACTURERS RECOMMENDATION

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FOLD FABRIC UP SLOPE

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TRENCH CUT 6" DEEP 6" WIDE

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FLOW

AutoCAD SHX Text 1 1/2" (NOM.) SQUARE X 42" (MIN.) HARDWOOD STAKE OR STEEL POST, DRIVEN INTO GRADE 12" MINIMUM INSTALLED 10' APART (MAX.), AND CANTED 2°-20° (MAX.) INTO SLOPE

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%%UPLAN

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FLOW

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AutoCAD SHX Text NOTES: : 1. HAYBALES SHALL BE MAINTAINED AND/OR REPLACED AS HAYBALES SHALL BE MAINTAINED AND/OR REPLACED AS REQUIRED OR AS DIRECTED BY THE TOWN. 2. PLACE HAYBALES SUCH THAT TWINE OR BINDING WIRE IS PLACE HAYBALES SUCH THAT TWINE OR BINDING WIRE IS PARALLEL TO THE EXISTING GROUND.

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TOE OF SLOPE OR UPSTREAM SWALE

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BALES TO BUTT TOGETHER

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2 - 2"X2"X3" LONG STAKES OR REBARS EACH BALE

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TRENCH 4" BELOW GRADE

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EMBANKMENT OR SWALE SLOPE

AutoCAD SHX Text BACKFILL AND COMPACT THE EXCAVATED SOIL AS SHOWN ON THE UPHILL SIDE OF THE BARRIER TO PREVENT TIPPING

AutoCAD SHX Text NOTE: DIMENSIONS OF BASIN SHOWN ARE BASED ON A MAXIMUM PUMP DISCHARGE RATE OF 20 GPM. THEREFORE, THE REQUIRED VOLUME IS 20 GPM x 16 = 320 CF; A STORAGE VOLUME OF ±330 CF HAS BEEN PROVIDED. THE DIMENSIONS OF THESETTLING BASIN WILL BE MODIFIED AS REQUIRED IN ACCORDANCE WITH THE 2024 CT GUIDELINES FOR SOIL EROSION AND SEDIMENT CONTROL IF THE PUMP SIZE CHANGES DURING CONSTRUCTION. IF REQUIRED, ADDITIONAL BASINS SHALL BE INSTALLED AS DIRECTED BY THE ENGINEER.

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PLAN

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COVER ENTIRE INSIDE AREA WITH ONE LAYER OF MODIFIED RIPRAP CTDOT M.12.02

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WOODEN STAKES

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SUPPORT DEWATERING HOSE ON HAYBALE

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DISCHARGE HOSE FROM DEWATERING PUMP

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OVERFLOW DISCHARGE TO PROPOSED GRASS SWALE

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TOP OF BANK/ORIGINAL GROUND LINE

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FINAL GRADE OF RIPRAP EMBANKMENT SHALL MATCH GRADES ON THE PLANS

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GEOTEXTILE

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FOREBAY BOTTOM ELEV = 140.0

AutoCAD SHX Text NOTES: : 1. REFER TO CONTRACT SPECIFICATIONS FOR SEED MIXTURES. REFER TO CONTRACT SPECIFICATIONS FOR SEED MIXTURES. 2. PERMANENT GRASS SEED MIXES SHALL BE APPLIED FROM APRIL 1 PERMANENT GRASS SEED MIXES SHALL BE APPLIED FROM APRIL 1 THOUGH JUNE 15 OR AUGUST 15 THROUGH OCTOBER 1. 3. PERENNIAL RYEGRASS SHALL BE APPLIED AS TEMPORARY GRASS PERENNIAL RYEGRASS SHALL BE APPLIED AS TEMPORARY GRASS SEED FROM MARCH 15 THROUGH JULY 1 OR AUGUST 1 THROUGH OCTOBER 15.

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FERTILIZER AND SEED

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SUBGRADE

EXISTING GROUND

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File details come from the government source that posted it. Updated .