RFIs and Photos.docx

RFIs with WVA Responses (in red):

1. Is HDPE an acceptable alternative jacket for the underground steam and condensate piping. I realize the spec says it is not, but we supplied underground steam and condensate piping for a Watervliet project just this year that had HDPE as the outer jacket/casing.

WVA: The exterior casing/jacket can be corrosion proof, non-metallic High-Density Polyethylene (H.D.P.E.).

1. If FRP is the only acceptable outer jacket, is heat shrink allowed to be used to seal the field joint locations. In the spec it references using fiberglass, which would require a hand lay-up process using fiberglass matt and resin which is a very difficult process in the field.

WVA: For both the FRP and HDPE exterior casings/jackets, the manufacturer’s requirements for addressing field joints shall dictate.

1. What is the existing material between Bldg. 110 and Bldg. 108? Concrete? Asphalt? Stone? See picture below for location reference.

WVA: The area in question is comprised of gravel and dirt.

1. Is the walkway running through the grass area (east of Bldg. 108 and north of the parking lot) asphalt? If not what material is existing? Is the walkway still existing? See photo below for reference.

WVA: The walkway in question is comprised of asphalt. Yes, the walkway still exists and is active with foot traffic.

1. Referenced on C-500, there is a bollard detail. Are there any bollards that need to be replaced in the area? If so, how many need to be replaced and where?

WVA: No bollards need to be replaced under this scope.

1. Are we to follow the Concrete Pavement Detail (Detail B2/C-500) or the Concrete Sidewalk Detail (Detail D/C-500)? The only concrete that would be in question to be replaced would be the sidewalks. Looking for more clarification on which to follow.

WVA: Concrete sidewalks are to be replaced in accordance with the Scope, Specification 03 WVA 02, and the “Sidewalk Detail” (Detail D/C-500). Where requirements conflict, the more stringent of the two shall comply.

1. Is there a curb detail that can be provided? Is the curb going to be concrete or granite? If concrete, is the curb precast or cast-in-place curb?

WVA: Curbing shall be replaced in accordance with the Scope, Specification 03 01 00, and the attached “Curb Detail”. Where requirements conflict, the more stringent of the two shall comply. The curbing will be cast-in-place.

1. Is the existing concrete tunnel being removed in its entirety and replaced along with the new steam and condensate utilities? Can a detail for the existing concrete tunnel be provided?

WVA: The concrete tunnel referenced on X1 – As-built Replacement Drawing was partially removed (top and sides) under Project No. 2WE047. Therefore, the Contractor shall plan on encountering the base of the tunnel, which will need to be removed prior to proceeding with the steam and condensate line replacement. Reference drawing “Concrete_Duct_for_Steam_and_Condensate_(3217-630_Jan_1941_1)”.

1. Per Option A, where is the existing compressed air pipe located? I.E., is it located within the same concrete tunnel that the steam and condensate lines run? Is it beneath the tunnel? Above the tunnel?

WVA: The underground compressed air piping is slightly above the steam and condensate lines. It follows the same pathway from Bldg. 110 to Bldg. 44 except for it heads straight where the expansion loops are present. Reference drawings C-002 and “Install_Compressed_Air_Piping_Bldg_110_to_Bldg_44_(5271-640_April_1981_1)”.

1. Will the existing manhole located on the sidewalk at the northeast corner of Bldg. 108 be an interference when removing and replacing the steam and condensate lines?

WVA: The Contractor shall plan on uncovering the structure during removal of the existing piping and field adjusting new steam and condensate lines during installation.

1. Will the existing manhole located on the corner of Hagner Rd and Buffington Rd be an interference when removing and replacing the seam and condensate lines?

WVA: The Contractor shall plan on uncovering the structure during removal of the existing piping and field adjusting new steam and condensate lines during installation.

1. Utility Profile / Depths The SOW provides pipe depths at each building but no intermediate elevations. Please provide a utility profile showing major depth changes along the run.

WVA: Unfortunately, we do not have a utility profile in our records. Please see attached map for rough elevations.

1. Traffic at Buffington St / Hagner Rd Intersection Please confirm the minimum traffic flow requirements at the Buffington Street / Hagner Road intersection during construction. Is single-lane alternating traffic with flaggers acceptable?

WVA: Per Section 3.1.1 of the SOW, The Contractor shall be responsible for Temporary Traffic Control (TTC) as the normal function of roads and streets. TTC planning shall provide for continuity of the movement of motor vehicles, bicycles, and pedestrian traffic; transit operations; and access to property and utilities. The TCC plan shall be approved by Project COR to include any needed modifications once activities are underway. However, this approval shall NOT absolve the Contractor of TTC responsibility, proper execution, and oversight. The Contractor shall maintain open roadways/streets throughout the project term, with the use of approved MUTCD/DOT traffic control devices, flaggers, and steel plates. A single lane with an alternating traffic pattern would be acceptable (lane width will need to accommodate passing of emergency vehicles – 10’ +/-). If or when detours are required to temporarily reroute road users, they shall be clearly marked and signed over their entire length so that motor vehicle operators can easily use existing streets / roads to navigate across campus. Signs should be properly maintained for cleanliness, visibility, retro reflectivity, and correct positioning. Signs that have lost significant legibility shall be promptly replaced.

1. Traffic on Hagner Rd Please confirm the required traffic pattern to be maintained along Hagner Road during construction, including any lane width or detour requirements.

WVA: Per Section 3.1.1 of the SOW, The Contractor shall be responsible for Temporary Traffic Control (TTC) as the normal function of roads and streets. TTC planning shall provide for continuity of the movement of motor vehicles, bicycles, and pedestrian traffic; transit operations; and access to property and utilities. The TCC plan shall be approved by Project COR to include any needed modifications once activities are underway. However, this approval shall NOT absolve the Contractor of TTC responsibility, proper execution, and oversight. The Contractor shall maintain open roadways/streets throughout the project term, with the use of MUTCD/DOT traffic control devices, flaggers, and steel plates. A single lane with an alternating traffic pattern would be acceptable (lane width will need to accommodate passing of emergency vehicles – 10’ +/-). If or when detours are required to temporarily reroute road users, they shall be clearly marked and signed over their entire length so that motor vehicle operators can easily use existing streets / roads to navigate across campus. Signs should be properly maintained for cleanliness, visibility, retro reflectivity, and correct positioning. Signs that have lost significant legibility shall be promptly replaced.

1. Compressed Air Line / Trench Requirements Please provide the trench layout, clearances, and bedding/backfill requirements showing the compressed air line, and confirm that the same trench detail applies if the existing air line remains in place.

WVA: These requirements are outlined in Section 3.1.7 of the SOW. Please see attached Standard Trench Detail.

1. Condensate line sizing SOW, item 3.1.4b (page 31 of 57) states new condensate line to be 2”, drawing C002 states 4”. Please clarify the size of the new condensate line.

WVA: That is a clerical error. The new condensate piping shall be 4” to match existing.

Photos:

Bldg. 44 (where it enters the basement)

Building 110 (where it enters the NE corner)

Steam Line Patch in 2022 image4.jpeg image5.png image1.gif image2.gif image3.jpeg