Pohick Bay Regional Park Pirates Cove Waterline Extension Addendum 1

Location:	Virginia
Posted:	Feb 19, 2026
Due:	Feb 26, 2026
Agency:	Northern Virginia Regional Park Authority
Type of Government:	State & Local
Category:	Y - Construction of Structures and Facilities Z - Maintenance, Repair or Alteration of Real Property
Publication URL:	To access bid details, please log in.

ADDENDUM NO. __1_

TO BID PACKAGE

Project: Pirates Cove Waterline Extension

Date: 2/19/26

This Addendum is issued to address Requests for Information (RFIs) received during the

bidding period. The following questions have been submitted by prospective bidders.

Responses will be incorporated into the Contract Documents as applicable. All other

requirements of the Bid Documents remain unchanged.

QUESTIONS & RESPONSES

Q1: What type of pipe is the existing 3-inch water line from the well?

A1: The existing pipe is Cast Iron

Q2: What type of pipe is the existing lateral that runs toward the pool from the existing line?

A2: The existing pipe is Cast Iron

Q3: Does the Engineer have a specification for connecting HDPE pipe to the existing pipe

material from the well?

A3: We’re proposing a new 3”x3” DIP TEE at the location where the 2 existing 3” Cast Iron

Pipes (mentioned in questions 1 & 2 above) come together with the proposed 4” HDPE

waterline. (see connection detail on sheet 7 of the latest plan) The existing 3” CI pipes will

require a good cleaning but should be compatible with the proposed TEE and 3” gate

valves. The proposed 4” HDPE pipe will connect to a 4”x3” DIP reducer with 3” gate valve

prior to connecting to the TEE. The HDPE pipe has the same basic inner and outer pipe

diameter/dimensions as DIP pipe and the connection between the 4” HDPE watermain and

the 4”x3” DIP reducer can be made with a mechanical joint connection. We propose that

all of the connections at the proposed 3”x3” TEE be made with mechanical joint

connections.

Q4: Will a backflow preventer be required between the existing well line and the new water

lines?

A4: No

Q5: The Contractor is to replace the existing water line between the well and the building.

Does this mean the open trench will encompass the entire gray, “L”-shaped Limits of

Disturbance (LOD) shown on Sheet 7?

A5: Yes, that is correct. Trench disturbance should be located within the LOD but shouldn’t

take up the full LOD.

Q6: Will a specification be provided for thrust block design?

A6: Spec attached.

This is the opportunity summary page. It provides an overview of this opportunity and a preview of the attached documentation.

See also