Marshall Gulch SOW_2025.pdf

Statement of Work Marshall Gulch Renovation

Coronado National Forest

Santa Catalina Ranger District

February 2025

1. Scope of Work

Work primarily consists of the construction of a 1,100-foot-long single-lane asphalt road with 32 roadside parking spaces and installation of two precast and prestressed beam bridges. The bridge designs are 64 and 76 feet long, both 30 feet wide with clear heights of approximately 8 feet.

Additional items include relocating a CXT vault restroom, constructing new and demolishing old picnic areas, installing new and removing old culverts, removing retaining walls, reconstructing a small channel, and various small improvements associated with the picnic areas and trailhead.

2. Background

Marshall Gulch is a popular day-use recreational destination located at an elevation of 7,500 feet at the confluence of Sabino and Marshall Creeks. Visitors access Marshall Gulch by vehicle using the Catalina Highway, which provides access to the Santa Catalina Mountains from the

City of Tucson. On average, the site receives over 65,000 cars each summer (May through

September), which includes those just driving through and others who stop to use the facilities.

Heaviest use occurs at Marshall Gulch from April 15 through late November, especially on weekends. Marshall Gulch provides trailhead access for Marshall Gulch Trail #3, Aspen Trail

#93, and Sunset Trail #90. The site also contains numerous picnic areas located along Sabino

Creek.

3. Technical Requirements

3.1. Construction shall adhere to codes, regulations, standards, and guidelines from:

• American Concrete Institute (ACI) - Manual 318

• Uniform Federal Accessibility Standards (UFAS), American Disabilities

Act/Architectural Barriers Act Accessibility Guidelines (ADAABAAG), and Forest

Service Outdoor Recreation Accessibility Guidelines (FSORAG). FSORAG are available on the internet at www.fs.fed.us/recreation/programs/accessibility.

• American Society for Testing and Materials (ASTM)

• Standardized Specifications for Paints and Coatings (SSPC)

• American National Standards Institute (ANSI)

• Occupational Health and Safety Administration (OSHA)

• Manual of Uniform Traffic Control Devices (MUTCD)

3.2. Construction shall adhere to the project plans:

• Proposed Road and Bridge Plans for Marshall Gulch. Morrison-Maierle Inc. Jan

2023.

• Renovate Marshall Gulch Picnic Area and Trailhead. Coronado NF. Nov 2023.

3.3. Construction shall adhere to the project specifications:

• FP-3, Standard Specifications for Construction of Roads and Bridges on Federal

Highway Projects

• Forest Service Supplemental Specifications for Marshall Gulch Bridge (FSSS).

Morrison-Maierle Inc Jan 2023.

• Renovate Marshall Gulch Picnic Area and Trailhead Specifications. Coronado NF.

Nov 2023.

4. Bid Items

The contractor is responsible for supplying and providing all plant, equipment, labor, survey, submittals, conformance with approved schedules, and traffic control (including pedestrian) to complete the work described in the contract package. Bidders shall provide a proposed Work

Schedule with sufficient detail to show anticipated periods of allowable public pedestrian traffic.

Bidders shall provide Past Performance references on no less than two completed projects of similar complexity. Bid items are separated by the plans in which the work is shown.

4.1. Main Bid Item

4.1.1. Proposed Road and Bridge Plans

• All work shown on Plans including survey, earthwork, roads, bridges, parking areas, drainage features, retaining walls, stripping, and signing.

4.2 Additive Bids Items 1 Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Demolish and remove five picnic areas and restroom within the road construction footprint see Sheet S-01.

• Demo a picnic area near Sabino Creek shown on Sheet S-01, Detail 1 on

Sheet D-01.

• Reestablish survey control points based on CP1 from the 2010 site survey, see Sheet G-02.

• Place three concrete picnic tables and install pedestal grills on existing parking lot shown on Sheet S-01, see Detail 2 on Sheet D-01. Pedestal grills shall be Pilot Rock’s Model No. A-20/S B2 or approved equal. Concrete picnic tables shall be Outdoor Creations Inc. Model No. 104FSS or approved equal.

• Build a 4-foot-wide and 25-foot-long concrete stairway with railing, see

Sheet S-01 and Detail 1 on Sheet D-02.

• Relocate CXT vault restroom approximately 300 feet from its existing position to the area created by grading shown on Proposed Road and Bridge

Plans Sheet 5. Protect fill slope with Class 4 for riprap. CXT model to be relocated is shown on Sheet D-03.

• Pour concrete between the CXT restroom and the asphalt parking spaces and on each side of the restroom, see Sheet D-04.

• Place riprap on the fill slope of the near relocated restroom, see Sheet S-02.

• Install government-furnished electronic fee station, see Sheet S-01 and Sheet

D-05.

• Relocate two trash bins and one recycle bin, see Sheet S-01.

• Remove remnants of stone masonry retaining walls which have failed or are no longer needed, will be marked by the COR, less than 10 CY total.

4.3. Additive Bid Items 2: Picnic Area South

4.3.1. Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Demo two picnic area near Sabino Creek shown on Sheet S-02, see Detail 1 on Sheet D-01.

• Place three concrete picnic tables and install pedestal grills on existing parking lot shown on Sheet S-02, see Detail 2 on Sheet D-01. Pedestal grills shall be Pilot Rock’s Model No. A-20/S B2 or approved equal. Concrete picnic tables shall be Outdoor Creations Inc. Model No. 104FSS or approved equal.

• Relocate two trash bins and one recycle bin, see Sheet S-02.

4.4. Additive Bid Items 3: Additional Vault Restroom

4.4.1. Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Furnish and install a CXT vault restroom adjacent to parking space no. 8 from the Proposed Road and Bridge Plans, see Sheet 5. To match the existing

CXT, order the same model and finishes used for CXT I.D no. T3131, built

10/25/2010.

• Pour concrete between the CXT restroom and the asphalt parking spaces and on each side of the restroom, see Sheet D-04.

4.5. Additive Bid Items 4: Ramp to Old Road

4.5.1. Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Construct a 12-foot-wide asphalt paved ramp from STA 4+40 of the road alignment from the Proposed Road and Bridge Plans to the existing road to the southern existing parking lot, see Sheets D-06 and D-07. The designed slope is 5 percent to provide an Outdoor Recreation Access Route (ORAR) to the southern picnic areas. Ensure path meets FSORAG accessibility requirements include where the road crosses the roadside ditch.

4.6. Additive Bid Items 5: Marshall Creek Reconstruction

4.6.1. Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Remove two 6-foot-span arch pipe CMPs, each approximately 65 feet long, shown on Sheet S-02. Remove upstream headwall and downstream retaining wall, see Sheets D-08 and D-09.

• Install a concrete box culvert, 10-foot-span, 3-foot-rise, and 10-foot-long with wing and cutoff walls. Final dimensions to be determined by the contractor and culvert manufacture, see Sheet D-11.

• Reconstruct channel, place boulders, seed, mulch, and protect banks with a

100% natural rolled erosion control product such as Coir matting. Detail shown on Sheet D-08.

4.7. Additive Bid Items 6: Sabino Creek Demo Wall and Recontouring

4.7.1. Renovate Marshall Gulch Picnic Area and Trailhead Plans

• Remove retaining wall downstream of pedestrian bridge, see Sheet D-09.

• Recontour parking lots as shown on Sheet S-02, place boulders, seed, mulch, and protect banks with 100% natural rolled erosion control product such as

Coir matting, see Sheet D-10.

• Subcontract willow propagation for Sabino Creek and Marshall Creek bank stabilization.

5. Government Furnished

• The Government will furnish one VenTek electronic fee machine model M600XC.

6. Deliverables / Schedule

A pre-construction meeting is required. A schedule for all work must be submitted to and approved by the Government prior to construction beginning. Allow 5 days for the review of deliverables.

Construction activity for Main Bid Items and Additive Bid Items 1 – 3 can begin August 1st.

Construction activity for Additive Bid Items 4 and 5 can begin September 1st. The operation of heavy equipment passed March 1st will not be permitted.

The required deliverables include, but are not limited to, the following:

Item No. Deliverable Reference

1 Schedule FAR: 52.236.15

2 Contractor Weed-Free Material Sources Certification FSSS: 105.02(b)

3 Material Certifications FP-3: 106.04 -.06

4 Permits and Agreements FP-3: 107.01

5 Certified Delivery Records of Items Weighed for Payment FP-3: 109.04

6 Survey Notes FP-3: 152.03

7 Contractor Quality Control Plan FP-3: 153.02

8 Traffic Control Plan & Temporary Closure Notice FSSS:156.03

9 Soil Erosion & Sediment Control Measures Plan FSSS: 157.03

10 Erosion and Sediment Control Measure Inspections Reports FP-3: 157.12

11 Sampling, Testing, & Compaction Results FP-3: 204.15

12 Cofferdam Design FP-3: 208.06

13 Dewatering Plans FP-3: 208.08

14 Sampling, Testing, & Compaction Results FP-3: 209.11

Item No. Deliverable Reference

15 Material Certifications FP-3: 255.06

16 Aggregate Surface Material FSSS: 301.02

17 Written Request for Roadbed Approval FSSS: 301.06

18 Aggregate Testing Results FP-3 301.08

19 Concrete Mix Design FP-3 552.03

20 Steel Order Lists and Bending Diagrams FP-3 554.03

21 Production Certification FP-3: 554.10

22 Weed-Free & Approved Seed Mix Certification FSSS: 625.07