Construction_RFP-12970223R0043 Questions and Answers.pdf

1. If a Storm Water Pollu�on Preven�on Plan is required per Arizona Department of Environmental Quality who is responsible?

The contractor will be responsible for coordina�ng, adhering, and paying any fees associated with a SWPPP checklist as required by ADEQ and coordina�ng with the forest service on the 401 water quality cer�fica�on process. Any ac�vi�es within the ordinary high-water mark (OHWM) of Oak Creek must only incur temporary impacts to water quality and must be completed within 6 months for ADEQ to issue a 401 water quality cer�fica�on.

2. What is the creek designa�on in this reach of Oak Creek?

Oak Creek is an outstanding Arizona water (OAW) and is impaired and requires higher level of protec�ons by ADEQ. For ac�vi�es outside the ordinary high-water mark (OHWM) on the top bank any earth disturbing ac�vi�es of 1 acre or more may require a stormwater Construc�on General Permit.

3. Will the site be closed during construc�on?

Yes, the site will be closed during construc�on.

4. The bypass plans show the turbid water between the two coffer dams to discharged 100 feet away from the stream, is there any flexibility in this requirement?

Turbid water can be discharged into the island area or just downstream of the downstream coffer down before the bypass water is returned to the creek. Riprap or other means will need to be placed at the outlet loca�on(s) to prevent turbidity from and sediment discharges before entering the creek.

5. Should contractors expect to move rocks onsite and offsite associated with the demoli�on of the exis�ng grouted riprap structure?

Contractors should expect to move rocks onsite and offsite for demoli�on of the exi�ng grouted riprap structure.

6. Will a sump be allowed in the creek to lower the height of the upstream coffer dam?

A sump will be allowed in the creek just above the upper coffer dam to help limit the height of the dam. Only loose material may be removed for this effort and absolutely no excava�on of bedrock.

7. Will the government provide an example of the texture for the new stepped wall?

Here is an example of what the texture for the new stepped wall could look like.

htps://www.stampedconcretesupplies.com/product-category/stamps/step-and-form-liners/ Grout and stamping adhered to the concrete a�er the main placement will not last/hold up over �me when the Oak Creek floods.

8. How will the 404-permit work?

The government will obtain the 404 permit and contractors will be required to follow and adhere to all aspects of the permit.

9. Why are FP-14 specifica�ons used?

Standard Specifica�ons for construc�on of Road and Bridges on Federal Highway Projects FP- 14 is what the forest service uses for these types of projects. Contractors are required to be familiar with the main specifica�ons book and any supplemental specifica�ons �ed to the project.

10. Will a quality control person be required to be always onsite by the contractor?

With the type of work and dewatering requirement of the project a QC person will probably be onsite most day but not necessarily required.

https://www.stampedconcretesupplies.com/product-category/stamps/step-and-form-liners/

11. For the conceptual creek bypass will the two discharge hoses from the area that is between the coffer dams be allowed to lay across the top of the camp site access road and be mounded over or have pipe bridges for vehicles to pass over them safely at a reduced speed? OR will the pipe be required to be trenched under the roadway and temporarily buried with asphalt patch over the top of them?

The pipes between the coffer dams can be routed across the top of the camp site access road and mounded over if needed. The pipes will not require pipe bridges or for them to be trenched under the roadway. The government an�cipates these pipes to be routed towards the highway side to allow for easier construc�on access for demoli�on and construc�on of the new reinforced concrete step wall.

12. On the side of the creek opposite the exis�ng grouted rip rap what is the limit of disturbance for where we can drive equipment in the flow line of the creek?

All disturbance shall be limited to only what is necessary for construc�on of project.

Contractors should expect it to be limited to 5’ or less from the water line on the opposite side of the grouted riprap. See atached pictures of the area and bank in ques�on.

13. Will the areas where we are discharging nuisance water to from the creek bed need to be protected with fence to prevent animals from ge�ng into the water? Since this is not a natural water loca�on that will atract animals.

The water being discharged will not need to be protected with fence or animals. This creek runs year-round and there’s ample amount of water for animals upstream and downstream of the project loca�on.

14. Is it the Governments intent to have the dewatering setup span the en�re project to include the concrete wingwall work shown on C-07 (1st one. There are two C-07 sheets in these plans.)? Or is it intended to dewater the two work zones separately?

Per the Cover Sheet index, the second C-07 sheet should be C-08 G4 W-Beam Guardrail Details, C-08 sheet should be C-09 Guardrail Anchorage Assembly Details, C-09 sheet should be C-10 Guardrail Flared Terminal Details. Contractors should submit a dewatering plan that is most effec�ve for accomplishing the en�rety of the work. The government an�cipated two areas to be dewatered to accomplish the work.

15. Is there a rate or amount of concrete required to grout the riprap?

The grout should follow 725.13(a)(2) per 252.02 Materials.

16. Is the stepped concrete revetements part of 601(01) and 601(02)?

The concrete step wall is covered under 601(01) Minor Concrete Structures (Bank Stabiliza�on)

17. What line item does the bedrock fall under?

Excava�on for Bedrock is covered under the op�on bid items 204(03) and 204(04). These were le� off the original pay items.

18. Do both ends of the weep hole need to be capped?

There is a 2” diameter perforated collec�on pipe that the weep hole pipes atach to so only the outlet of the weep hole pipes need to have mesh and the ends of the perforated collec�on pipe need caps.

19. In regards to the "Simulated Stone Masonry Surface," what falls under this line item as I am not seeing details in the specs or drawings?

This applies to the ver�cal por�on of the concrete step wall.