architects -+- engineers
~~ ~`~
architects -+- engineers 2 Executive Blvd, Suite 401 Suffern, NY 10956
iel 845.357.7238 fax 845.357.7267
August 8, 2017 Mr. Ralph Swenson, P.E. City Engineer City of Kingston City Hall 420 Broadway Kingston, New York 12401 Re: Jacobs Valley Storm Sewer System Design Proposed Additional Design Effort —Susan Street Area Drainage Design H2M Project No.: KNGS 16-01 Dear Mr. Swenson: H2M architects +engineers (H2M) is pleased to provide the City of Kingston (City) with this proposal for additional professional engineering services. This proposal is a revision of a Letter Proposal submitted to the City on May 9, 2017. The work associated with this proposal includes additional design efforts that were requested by the City following our Engineering Evaluation of the YMCA area drainage and subsequent meetings on April 12, April 27, and May 18, 2017. The additional areas of work discussed in this Proposal are: A.
New drainage parallel to Susan Street, routed across the parking lot shared by the Kingston YMCA and the River Radiology Building, and connect to the new Jacobs Valley drainage trunk line to be located at the intersection of Susan and Summer Streets: Computer-based modeling and design of new drainage segments to capture parking lot and roof-top runoff generated from the River Radiology, and YMCA properties; new Plans and Profiles and modification to the existing Jacobs Valley design documents from the intersection of Susan and Summer streets through the drainage structure connection.
PROJECT BACKGROUND As detailed in our YMCA Drainage Evaluation Proposal (January 12, 2017), The City wishes to add the storm drainage that exists along Susan Street behind the YMCA to the Jacob's Valley Drainage Improvements project. Based on our investigations, the drainage system that exists includes parking lot drywells, catch basins and roof-top drains. The area surrounding the YMCA has experienced repeated storm-related flooding, to include the occasional back-up into the YMCA building through connected drains. H2M had initially added the YMCA drainage manholes along Susan Street into our survey efforts as part of the Jacob's Valley Improvements (2016). This was to determine the feasibility of connecting the Susan Street segment to our new Jacob's Valley system. The drainage segment along Susan Street was found to be surcharged with several feet of water found in each manhole. Determining the number of connections and their inverts was not possible. H2M had to then rely on as-built drawings provided by the City to determine the connection to the new Jacob's Valley system. It was determined that the Susan Street segment could be connected to the Jacob's Valley system at the intersection of Susan and Summer Streets. However, to facilitate this, the rest of the downstream Jacob's Valley segments would have to be lowered approximately 7.5-feet. This was determined to be cost-prohibitive, as the drainage system in this area was already at considerable depth. Following our 75% Design Review on November 18, 2016, the City requested H2M to evaluate the feasibility of replacing the existing drainage line behind the YMCA. This would include routing a new YMCA drainage segment the opposite direction, and connect to the 30-inch Broadway drainage trunk CORPORATE HEADQUARTERS 538 Broad Hollow Road, 4'h Floor East I Melville, NY 11747 1631.756.8000 I www.h2m.com
City of Kingston August 8, 2017 Page 2 of 4 line. This was considered aless-costly alternative to lowering nearly half of the Jacob's Valley system. To complete this evaluation, H2M had to confirm the existing drainage connections and inverts in the field and determine if it was feasible to flow by gravity to a connection in the Broadway trunk. This required the City to drain the surcharged manholes located along Susan Street. This was completed on February 28, 2017 when H2M met with our Surveyor and City personnel in the field, as the City DPW vacuumed the surcharged water from two of the manholes. The segment was emptied sufficiently for our surveyor to confirm the connections and their invert elevations. It was also discovered that the connection of the 14inch YMCA drainage line was not as shown, but likely connected to an adjacent manhole that was surcharged. The City Engineer's office administered dye to an upstream YMCA manhole to confirm this. Our Evaluation confirmed that, based on our verified invert elevations, a new drainage segment could be installed and connected to the Broadway drainage system. The drainage segment would capture the flow from each of the existing manholes along Susan street (beginning at River Radiology). However, the manholes along Susan street have an average depth of 15-feet, and the segment would pass through an easement area located between the YMCA and the Ulster Uniform Services building that has a depth over 22-ft. In addition, the easement area is a parking lot and driveway that has heavy traffic from the Uniform Services company. Installing a pipeline at these locations and depths would be disruptive and costly. In an effort to reduce impact on the Uniform Services property owner, the City has asked H2M to include directional drilling (trenchless installation) as part of the Engineer's Cost Opinion developed in the Evaluation phase. H2M has since determined that directional drilling is not the preferred option for gravity lines, and that "pipe jacking" would be the better option. Pipe jacking uses an outer pipe casing that the gravity line would be installed within at the proper slope. The resulting cost estimate for the Broadway connection option via pipe-jacking came to $1.18 million which is was also considered cost-prohibitive. On May 19, 2017 H2M met with The City and representatives from Brinnier and Larios, P.C. (YMCA Engineer) who were representing the management of the YMCA. Several options were evaluated in capturing the storm drainage and rerouting to a new gravity line or possibly a new pump station. It was later determined by the YMCA Engineer that the new drainage route exiting the YMCA building could be set at an elevation of 170-ft +/-. With direction from the City, H2M is proposing to design a new gravity drainage line that will extend from the YMCA building and travel parallel to Susan street along the lower parking lot area, and cut through the Radiology curb line to connect at the intersection of Susan and Summer Streets. At the City's request, the pipeline will be set at a minimal slope (0.25%) in order to connect by gravity to the new drainage system.
DESIGN SERVICES This proposal includes the design of the new drainage segment parallel to Susan Street, through the parking lot, and connect to the new Jacobs Valley drainage trunk line. A.
YMCA / Radiologv Parking Lot Design Scope: H2M will provide the following services for design of a new drainage segment across the YMCA / Radiology parking lot to the Susan /Summer Street intersection: Size and specify a new drainage pipeline to transfer stormwater runoff from the YMCA and Radiology parking lots and roof tops. 2.
Develop Plans and Profiles depicting the route of the new drainage segment to be located along the south side of the YMCA building and along the northwest border of the rear parking lot. Modify the existing Plans and Profiles for the new Jacobs Valley design. The designed invert elevations at the Susan and Summer street manhole downstream to the drainage structure connection will be lowered 1 to 1.5 ft. Any existing utilities that will be in conflict with the new elevations will require additional effort to re-route.
4.
Modify the Erosion and Sedimentation Plan to include this new work.
City of Kingston August 8, 2017 Page 3 of 4
~~i=.-+k ~ of ~":
5.
Modify the Traffic Control Plan to include the new work.
6.
Modify the project specifications to include the additional work.
7.
Coordinate with our surveyor to develop a meets &bounds description for a new documented easement to be filed by the City within the parking lot area.
8.
Provide an Engineer's Opinion of Probable Cost for the new drainage design.
B.
YMCA /Radiology Design Fee: H2M proposes to provide the services described above for a lump sum fee of $32,000 to include field survey (easement) work, labor and expenses.
C.
YMCA / Radiologv Design Schedule: H2M will begin the field investigations immediately upon approval. Mobilization will be dependent on the surveyor availability. We anticipate the completion of the YMCA /Radiology drainage system to be completed within thirty (30) days following the City's approval of this proposal.
SERVICES EXCLUDED ■
Any work not specifically outlined above
■
Soil sampling /soil borings taken in the parking lot area. Soil Boring data provided by the YMCA Engineer (Brinnier & Larios, P.C.)
•
Third-party utility markouts of the parking lot area; Existing parking lot utility drawing provided by YMCA Engineer (Brinnier & Larios, P.C.)
■
Acquiring "Right to Access Agreements" from either the YMCA or River Radiology property owners
■
Negotiation of easement agreements with affected property owners
■
Hydraulic modeling of drainage from the Rail Road Club or Ulster County Uniform Services
H2M would invoice the City of Kingston monthly based on the actual work completed. Any additional fees for consultants or changes in the scope of work will be identified in writing and agreed upon, prior to the commencement of additional work. All terms and conditions for this work will be in accordance with the previously executed Agreement dated March 18, 2016. This offer to perform the proposed services shall remain open for ninety (90) days from the date of the proposal. Extension of this proposal shall be in writing only. If the terms and conditions are acceptable to the City of Kingston, please sign below and return a signed copy of this proposal to our office.
City of Kingston August 8, 2017 Page 4 of 4
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If you have any questions or require further clarification, please feel free to contact David Leun at (845) 357-7238 extension 2052 or the undersigned at extension1610. Very truly yours, H2M architects +engineers
/~ 22 .~~` George W. Desmarais, P.E. Senior Vice President cc:
~.~~
David K. Leun, P.E. Municipal Engineering Manager
NDB — H2M
PROPOSAL AGREED &ACCEPTED BY: Signature: Print Name: Title:
client: address:
City of Kingston 420 Broadway Kingston, New York 12401
Date: X:\KNGS (City of Kingston)\KNGS 1601 (Jacobs Valley Storm Sewer Sys Design)\00-AGREEMENIIPrime Agreement~Additional Work\YMCA Area Drainage DESIGN\LP17####(coKingston_YMCA Area Drainage Des_REV).doc
architects -+- engineers 2 Executive Blvd, Suite 401 Suffern, NY 10956
iel 845.357.7238 fax 845.357.7267
August 8, 2017 Mr. Ralph Swenson, P.E. City Engineer City of Kingston City Hall 420 Broadway Kingston, New York 12401 Re: Jacobs Valley Storm Sewer System Design Proposed Additional Design Effort —Susan Street Area Drainage Design H2M Project No.: KNGS 16-01 Dear Mr. Swenson: H2M architects +engineers (H2M) is pleased to provide the City of Kingston (City) with this proposal for additional professional engineering services. This proposal is a revision of a Letter Proposal submitted to the City on May 9, 2017. The work associated with this proposal includes additional design efforts that were requested by the City following our Engineering Evaluation of the YMCA area drainage and subsequent meetings on April 12, April 27, and May 18, 2017. The additional areas of work discussed in this Proposal are: A.
New drainage parallel to Susan Street, routed across the parking lot shared by the Kingston YMCA and the River Radiology Building, and connect to the new Jacobs Valley drainage trunk line to be located at the intersection of Susan and Summer Streets: Computer-based modeling and design of new drainage segments to capture parking lot and roof-top runoff generated from the River Radiology, and YMCA properties; new Plans and Profiles and modification to the existing Jacobs Valley design documents from the intersection of Susan and Summer streets through the drainage structure connection.
PROJECT BACKGROUND As detailed in our YMCA Drainage Evaluation Proposal (January 12, 2017), The City wishes to add the storm drainage that exists along Susan Street behind the YMCA to the Jacob's Valley Drainage Improvements project. Based on our investigations, the drainage system that exists includes parking lot drywells, catch basins and roof-top drains. The area surrounding the YMCA has experienced repeated storm-related flooding, to include the occasional back-up into the YMCA building through connected drains. H2M had initially added the YMCA drainage manholes along Susan Street into our survey efforts as part of the Jacob's Valley Improvements (2016). This was to determine the feasibility of connecting the Susan Street segment to our new Jacob's Valley system. The drainage segment along Susan Street was found to be surcharged with several feet of water found in each manhole. Determining the number of connections and their inverts was not possible. H2M had to then rely on as-built drawings provided by the City to determine the connection to the new Jacob's Valley system. It was determined that the Susan Street segment could be connected to the Jacob's Valley system at the intersection of Susan and Summer Streets. However, to facilitate this, the rest of the downstream Jacob's Valley segments would have to be lowered approximately 7.5-feet. This was determined to be cost-prohibitive, as the drainage system in this area was already at considerable depth. Following our 75% Design Review on November 18, 2016, the City requested H2M to evaluate the feasibility of replacing the existing drainage line behind the YMCA. This would include routing a new YMCA drainage segment the opposite direction, and connect to the 30-inch Broadway drainage trunk CORPORATE HEADQUARTERS 538 Broad Hollow Road, 4'h Floor East I Melville, NY 11747 1631.756.8000 I www.h2m.com
City of Kingston August 8, 2017 Page 2 of 4 line. This was considered aless-costly alternative to lowering nearly half of the Jacob's Valley system. To complete this evaluation, H2M had to confirm the existing drainage connections and inverts in the field and determine if it was feasible to flow by gravity to a connection in the Broadway trunk. This required the City to drain the surcharged manholes located along Susan Street. This was completed on February 28, 2017 when H2M met with our Surveyor and City personnel in the field, as the City DPW vacuumed the surcharged water from two of the manholes. The segment was emptied sufficiently for our surveyor to confirm the connections and their invert elevations. It was also discovered that the connection of the 14inch YMCA drainage line was not as shown, but likely connected to an adjacent manhole that was surcharged. The City Engineer's office administered dye to an upstream YMCA manhole to confirm this. Our Evaluation confirmed that, based on our verified invert elevations, a new drainage segment could be installed and connected to the Broadway drainage system. The drainage segment would capture the flow from each of the existing manholes along Susan street (beginning at River Radiology). However, the manholes along Susan street have an average depth of 15-feet, and the segment would pass through an easement area located between the YMCA and the Ulster Uniform Services building that has a depth over 22-ft. In addition, the easement area is a parking lot and driveway that has heavy traffic from the Uniform Services company. Installing a pipeline at these locations and depths would be disruptive and costly. In an effort to reduce impact on the Uniform Services property owner, the City has asked H2M to include directional drilling (trenchless installation) as part of the Engineer's Cost Opinion developed in the Evaluation phase. H2M has since determined that directional drilling is not the preferred option for gravity lines, and that "pipe jacking" would be the better option. Pipe jacking uses an outer pipe casing that the gravity line would be installed within at the proper slope. The resulting cost estimate for the Broadway connection option via pipe-jacking came to $1.18 million which is was also considered cost-prohibitive. On May 19, 2017 H2M met with The City and representatives from Brinnier and Larios, P.C. (YMCA Engineer) who were representing the management of the YMCA. Several options were evaluated in capturing the storm drainage and rerouting to a new gravity line or possibly a new pump station. It was later determined by the YMCA Engineer that the new drainage route exiting the YMCA building could be set at an elevation of 170-ft +/-. With direction from the City, H2M is proposing to design a new gravity drainage line that will extend from the YMCA building and travel parallel to Susan street along the lower parking lot area, and cut through the Radiology curb line to connect at the intersection of Susan and Summer Streets. At the City's request, the pipeline will be set at a minimal slope (0.25%) in order to connect by gravity to the new drainage system.
DESIGN SERVICES This proposal includes the design of the new drainage segment parallel to Susan Street, through the parking lot, and connect to the new Jacobs Valley drainage trunk line. A.
YMCA / Radiologv Parking Lot Design Scope: H2M will provide the following services for design of a new drainage segment across the YMCA / Radiology parking lot to the Susan /Summer Street intersection: Size and specify a new drainage pipeline to transfer stormwater runoff from the YMCA and Radiology parking lots and roof tops. 2.
Develop Plans and Profiles depicting the route of the new drainage segment to be located along the south side of the YMCA building and along the northwest border of the rear parking lot. Modify the existing Plans and Profiles for the new Jacobs Valley design. The designed invert elevations at the Susan and Summer street manhole downstream to the drainage structure connection will be lowered 1 to 1.5 ft. Any existing utilities that will be in conflict with the new elevations will require additional effort to re-route.
4.
Modify the Erosion and Sedimentation Plan to include this new work.
City of Kingston August 8, 2017 Page 3 of 4
~~i=.-+k ~ of ~":
5.
Modify the Traffic Control Plan to include the new work.
6.
Modify the project specifications to include the additional work.
7.
Coordinate with our surveyor to develop a meets &bounds description for a new documented easement to be filed by the City within the parking lot area.
8.
Provide an Engineer's Opinion of Probable Cost for the new drainage design.
B.
YMCA /Radiology Design Fee: H2M proposes to provide the services described above for a lump sum fee of $32,000 to include field survey (easement) work, labor and expenses.
C.
YMCA / Radiologv Design Schedule: H2M will begin the field investigations immediately upon approval. Mobilization will be dependent on the surveyor availability. We anticipate the completion of the YMCA /Radiology drainage system to be completed within thirty (30) days following the City's approval of this proposal.
SERVICES EXCLUDED ■
Any work not specifically outlined above
■
Soil sampling /soil borings taken in the parking lot area. Soil Boring data provided by the YMCA Engineer (Brinnier & Larios, P.C.)
•
Third-party utility markouts of the parking lot area; Existing parking lot utility drawing provided by YMCA Engineer (Brinnier & Larios, P.C.)
■
Acquiring "Right to Access Agreements" from either the YMCA or River Radiology property owners
■
Negotiation of easement agreements with affected property owners
■
Hydraulic modeling of drainage from the Rail Road Club or Ulster County Uniform Services
H2M would invoice the City of Kingston monthly based on the actual work completed. Any additional fees for consultants or changes in the scope of work will be identified in writing and agreed upon, prior to the commencement of additional work. All terms and conditions for this work will be in accordance with the previously executed Agreement dated March 18, 2016. This offer to perform the proposed services shall remain open for ninety (90) days from the date of the proposal. Extension of this proposal shall be in writing only. If the terms and conditions are acceptable to the City of Kingston, please sign below and return a signed copy of this proposal to our office.
City of Kingston August 8, 2017 Page 4 of 4
~~~ ~~-~
If you have any questions or require further clarification, please feel free to contact David Leun at (845) 357-7238 extension 2052 or the undersigned at extension1610. Very truly yours, H2M architects +engineers
/~ 22 .~~` George W. Desmarais, P.E. Senior Vice President cc:
~.~~
David K. Leun, P.E. Municipal Engineering Manager
NDB — H2M
PROPOSAL AGREED &ACCEPTED BY: Signature: Print Name: Title:
client: address:
City of Kingston 420 Broadway Kingston, New York 12401
Date: X:\KNGS (City of Kingston)\KNGS 1601 (Jacobs Valley Storm Sewer Sys Design)\00-AGREEMENIIPrime Agreement~Additional Work\YMCA Area Drainage DESIGN\LP17####(coKingston_YMCA Area Drainage Des_REV).doc
