Angostura_Dam_Spillway_Repair_Sources_Sought_1.docx

This is a Sources Sought Announcement for the ANGOSTURA DAM SPILLWAY CONCRETE REPAIR Pick-Sloan Missouri Basin Program South Dakota

This announcement is being used for market research and advanced planning purposes. Proposals are not requested and will not be accepted from this Sources Sought Notice. THIS IS NOT A SOLICITATION FOR PROPOSALS AND A CONTRACT WILL NOT BE AWARDED AS A RESULT OF THIS NOTICE. The location is at Angostura Dam, approximately 10 miles south of Hot Springs, South Dakota, in Fall River County. The dam is located 2.8 miles southwest of US Highway 18 and is accessible via North Angostura Road (County Highway 1A), and North Dam Road.

Principal components of work to be performed under these specifications include:

1. Removing and replacing damaged concrete on the downstream face of the spillway. Current repair plans include, but are not limited to:

· Removing approximately 4,500 total square feet of concrete (in multiple repair locations) to a depth of six inches

· Installing lateral reinforcement bars at each of the repair locations

· Preparing the exposed surfaces for concrete placement

· Placing new cast-in-place concrete or shotcrete to the original grade, and

· Trowel-finishing the surface to a tolerance of 1/8-inch (abrupt) or 1/32-inch (gradual).

2. Construction constraints include the following:

· Vehicular and equipment access to the spillway is very limited. The concrete portion of the dam crest is only 9 feet wide, and no vehicular access is permitted across the metal grated bridge deck above the radial gates. Side access is limited to 50 feet away on one side only. An old service road leads to an abandoned powerplant near the river channel downstream, but it is currently inadequate for heavy traffic and does not provide access to the riverbed or stilling basin.

· The anticipated spillway construction window is between August 15 and November 30 to avoid potential flood releases through the spillway.

· The reservoir cannot be lowered during construction, so water will remain on the radial gates.

· The stilling basin cannot be dewatered either, and allowing material to fall into it should be avoided.

· In accordance with State law, the Government may arrange for removal of the long-eared bat, with the implication being that trees may only be cut between November 1st through April 14th of the respective calendar year(s) in order to build and/or maintain the temporary roadway to the face of the dam.

3. Improving the Angostura Powerplant access road;

4. Extending a temporary access road into the river channel downstream of the spillway

5. Removing the temporary access road from the river channel to bring back the river channel area to its natural state. Removal of the temporary access road need not be accomplished by November 30th.

The Government is seeking interested in 8(a) and small businesses, small-disadvantaged businesses, woman-owned small businesses, HubZone small businesses and/or service-disabled veteran owned small business concerns who have the specialized knowledge, experience, and resources necessary to successfully complete a project of this size, scope, and complexity. The NAICS Code for this project is 237990 Other Heavy and Civil Engineering Construction with a business size standard of $45 million. In accordance with FAR 36.204, the estimated magnitude of this proposed construction project is between $5,000,000 and $10,000,000.

The Government will not reimburse any costs associated with responding to this Sources Sought Notice. This notice shall not be construed as a commitment by the Government to issue a solicitation or ultimately award a contract, nor does it restrict the Government to a particular acquisition approach. The Government will not be bound to this information if a solicitation is issued. A determination by the Government not to compete this proposed contract action, based on the responses to this notice, is at the discretion of the Government.

Capability statements shall be submitted to Contract Specialist Mitchell Frost at mfrost@usbr.gov no later than 5:00 p.m. MST on November 14, 2023.

For record keeping purposes, telephonic inquiries will not be accepted.