A04_20220608_SOW_RV_Pad.doc

United States Department of the Interior

FISH AND WILDLIFE SERVICE

Iron River National Fish Hatchery

10325 Fairview Road

Iron River, WI 54847

Phone: 715.372.8510 Fax: 715.372.8410

April 27, 2022

Subject: Installation of Concrete Recreational Vehicle Pad with Services Iron River National Fish Hatchery is requesting the installation of a full-service RV pad to be located as an extension off the paved area in front of the Storage Building. This project will be beneficial to three different programs at Iron River by providing a designated spot for the summer volunteer program (June-August); mass marking program (September-October) and sturgeon trailer storage (October-April).

Project will include electrical hookup, water hookup, sanitary holding tank, grading, concrete site preparation, concrete pad, seeding and site cleanup.

Contractor is responsible for calling Diggers Hotline and locating utilities ahead of time. Contractor is responsible for site visit and confirmation of all measurements. Contractor is responsible for removal and disposal of all demolition, trash, and construction debris. Contractor is responsible for supplying all new materials and labor to complete project. Contractor is responsible to obtain all required county, state, and federal building permits.

Specifications are as follows:

· Installation of 10’x40’x 5.5” concrete pad to include:

· Compact subgrade to 95 % compaction rate prior to geo fabric installation

· Geo fabric installed under crushed rock surface

· Leveled and tamped 10’x40’x4” crushed rock

· 10’x40’x 5.5” 4000 lb psi, fiber added concrete pad with wire mesh

· Control joint will be cut in concrete between 6-18 hours of finishing. Lines will be cut to make (8) 5’x10’ rectangles

· 4”x4” ground contact treated post installation for electrical service box and water line hookup, set in concrete

· Potable water service

· A minimum of ¾ inch Pex water line will be supplied and installed below the frostline from either the storage building or well head. Install a shut off valve inside the storage building or inline if originating from the well head. Supply key to operate shut off valve if applicable.

· Supply and install a frost free self-draining hydrant with 24” of drainage stone below frost line for drainage

· Hydrant secured to 4x4 post

· 1,500 gallon concrete holding tank with alarm system

· Install watertight concrete underground septic holding tank with pump out access and venting according to local code :

· Install a float sensor with audible and alarm light to indicate 75 % full on 4”x4” post

· Install RV discharge pipe to holding tank with locking cap.

· All utility connections, electrical, water and sanitation, to be located in the same area

· Water, sanitation and electrical lines will not run under concrete pad.

· Contractor is responsible for making the construction site presentable at the end of the project, including landscaping and reseeding all disturbed areas.

· Contractor will follow best management plans to mitigate any runoff from disturbed areas.

· Contractor will follow any and all bio-security measures in place at the facility.

· All mobilized equipment will be free of dirt and seeds to ensure there is no transmission of invasive plants.

· Electrical service from storage building to concrete pad

· Galvanized conduit will supplied and installed through bottom level storage building and trenched to service post.

· Install proper sized wire for length of run and amp requirement according to national electric code.

· Installation of a RV 80-amp weatherproof service box with a 240 volt 50 amp four prong and a 120volt three prong 30 amp RV receptacle and a 30amp GFCI 120 outlet on 4”x4” post

· 551.72 Distribution System.

Receptacles rated at 50 amperes shall be supplied from a branch circuit of the voltage class and rating of the receptacle. Other recreational vehicle sites with 125-volt, 20- and 30-ampere receptacles shall be permitted to be derived from any grounded distribution system that supplies 120-volt single-phase power. The neutral conductors shall not be reduced in size below the size of the ungrounded conductors for the site distribution. The neutral conductors shall be permitted to be reduced in size below the minimum required size of the ungrounded conductors for 240-volt, line-to-line, permanently connected loads only.

551.73 Calculated Load.

(A) Basis of Calculations. Electrical service and feeders shall be calculated on the basis of not less than 9600 volt-amperes per site equipped with 50-ampere, 120/240-volt supply facilities; 3600 volt-amperes per site equipped with both 20-ampere and 30-ampere supply facilities; 2400 volt-amperes per site equipped with only 20-ampere supply facilities; and 600 volt-amperes per site equipped with only 20-ampere supply facilities that are dedicated to tent sites. The demand factors set forth in Table 551.73 shall be the minimum allowable demand factors that shall be permitted in calculating load for service and feeders. Where the electrical supply for a recreational vehicle site has more than one receptacle, the calculated load shall only be calculated for the highest rated receptacle.

Where the electrical supply is in a location that serves two recreational vehicles, the equipment for both sites must comply with 551.77 and the calculated load shall only be computed for the two receptacles with the highest rating.

551.74 Overcurrent Protection.

Overcurrent protection shall be provided in accordance with Article 240.

551.75 Grounding.

All electrical equipment and installations in recreational vehicle parks shall be grounded as required by Article 250.

551.76 Grounding — Recreational Vehicle Site Supply Equipment.

(A) Exposed Non–Current-Carrying Metal Parts. Exposed non–current-carrying metal parts of fixed equipment, metal boxes, cabinets, and fittings that are not electrically connected to grounded equipment shall be grounded by a continuous equipment grounding conductor run with the circuit conductors from the service equipment or from the transformer of a secondary distribution system. Equipment grounding conductors shall be sized in accordance with 250.122 and shall be permitted to be spliced by listed means.

The arrangement of equipment grounding connections shall be such that the disconnection or removal of a receptacle or other device will not interfere with, or interrupt, the grounding continuity.

(B) Secondary Distribution System. Each secondary distribution system shall be grounded at the transformer.

(C) Neutral Conductor Not to Be Used as an Equipment Ground. The neutral conductor shall not be used as an equipment ground for recreational vehicles or equipment within the recreational vehicle park.

(D) No Connection on the Load Side. No connection to a grounding electrode shall be made to the neutral conductor on the load side of the service disconnecting means except as covered in 250.30(A) for separately derived systems and 250.32(B)(2) for separate buildings.

551.77 Recreational Vehicle Site Supply Equipment.

(A) Location. Where provided on back-in sites, the recreational vehicle site electrical supply equipment shall be located on the left (road) side of the parked vehicle, on a line that is 1.5 m to 2.1 m (5 ft to 7 ft) from the left edge (driver’s side of the parked RV) of the stand and shall be located at any point on this line from the rear of the stand to 4.5 m (15 ft) forward of the rear of the stand.

For pull-through sites, the electrical supply equipment shall be permitted to be located at any point along the line that is 1.5 m to 2.1 m (5 ft to 7 ft) from the left edge (driver’s side of the parked RV) from 4.9 m (16 ft) forward of the rear of the stand to the center point between the two roads that gives access to and egress from the pull-through sites.

The left edge (driver’s side of the parked RV) of the stand shall be marked.

(B) Disconnecting Means. A disconnecting switch or circuit breaker shall be provided in the site supply equipment for disconnecting the power supply to the recreational vehicle.

(C) Access. All site supply equipment shall be accessible by an unobstructed entrance or passageway not less than 600 mm (2 ft) wide and 2.0 m (6 ft 6 in.) high.

(D) Mounting Height. Site supply equipment shall be located not less than 600 mm (2 ft) or more than 2.0 m (6 ft 6 in.) above the ground.

(E) Working Space. Sufficient space shall be provided and maintained about all electrical equipment to permit ready and safe operation, in accordance with 110.26.

(F) Marking. Where the site supply equipment contains a 125/250-volt receptacle, the equipment shall be marked as follows: “Turn disconnecting switch or circuit breaker off before inserting or removing plug. Plug must be fully inserted or removed.” The marking shall be located on the equipment adjacent to the receptacle outlet.

551.78 Protection of Outdoor Equipment.

(A) Wet Locations. All switches, circuit breakers, receptacles, control equipment, and metering devices located in wet locations or outside of a building shall be rainproof equipment.

(B) Meters. If secondary meters are installed, meter sockets without meters installed shall be blanked off with an approved blanking plate.

551.80 Underground Service, Feeder, Branch-Circuit, and Recreational Vehicle Site Feeder-Circuit Conductors.

(A) General. All direct-burial conductors, including the equipment grounding conductor if of aluminum, shall be insulated and identified for the use. All conductors shall be continuous from equipment to equipment. All splices and taps shall be made in approved junction boxes or by use of material listed and identified for the purpose.

(B) Protection against Physical Damage. Direct-buried conductors and cables entering or leaving a trench shall be protected by rigid metal conduit, intermediate metal conduit, electrical metallic tubing with supplementary corrosion protection, rigid nonmetallic conduit, liquidtight flexible nonmetallic conduit, liquidtight flexible metal conduit, or other approved raceways or enclosures. Where subject to physical damage, the conductors or cables shall be protected by rigid metal conduit, intermediate metal conduit, or Schedule 80 rigid nonmetallic conduit. All such protection shall extend at least 450 mm (18 in.) into the trench from finished grade.

FPN: See 300.5 and Article 340 for conductors or Type UF cable used underground or in direct burial in earth.

551.81 Receptacles.

A receptacle to supply electric power to a recreational vehicle shall be one of the configurations shown in Figure 551.46(C) in the following ratings.

(1) 50-ampere — 125/250-volt, 50-ampere, 3-pole, 4-wire grounding type for 120/240-volt systems

(2) 30-ampere — 125-volt, 30-ampere, 2-pole, 3-wire grounding type for 120-volt systems

(3) 20-ampere — 125-volt, 20-ampere, 2-pole, 3-wire grounding type for 120-volt systems

FPN: Complete details of these configurations can be found in ANSI/NEMA WD 6-1989, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figures 14-50, TT, and 5-20.

(1) Units with One 15-Ampere Branch Circuit. Recreational vehicles having only one 15-ampere branch circuit as permitted by 551.42(A) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 15 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C).

FPN: Complete details of this configuration can be found in National Electrical Manufacturers Association’s ANSI/NEMA WD 6-1989, Standard for Dimensions of Attachment Plugs and Receptacle, Figure 5.15 Figure 551.46(C) Configurations for Grounding-Type Receptacles and Attachment Plug Caps Used for Recreational Vehicle Supply Cords and Recreational Vehicle Lots.

(2) Units with One 20-Ampere Branch Circuit. Recreational vehicles having only one 20-ampere branch circuit as permitted in 551.42(B) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 20 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C).

FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-1989, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure 5.20.

(3) Units with Two to Five 15- or 20-Ampere Branch Circuits. Recreational vehicles wired in accordance with 551.42(C) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 30 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C), intended for use with units rated at 30 amperes, 125 volts.

FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-1989, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure TT.

(4) Units with 50-Ampere Power Supply Assembly. Recreational vehicles having a power-supply assembly rated 50 amperes as permitted by 551.42(D) shall have a 3-pole, 4-wire grounding-type attachment plug rated 50 amperes, 125/250 volts, conforming to the configuration shown in Figure 551.46(C).

FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-1989, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure 14.50.

(D) Labeling at Electrical Entrance. Each recreational vehicle shall have permanently affixed to the exterior skin, at or near the point of entrance of the power-supply cord(s), a label 75 mm × 45 mm (3 in. × 1¾ in.) minimum size, made of etched, metal-stamped, or embossed brass, stainless steel, or anodized or alclad aluminum not less than 0.51 mm (0.020 in.) thick, or other suitable material [e.g., 0.13 mm (0.005 in.) thick plastic laminate] that reads, as appropriate, either

Example RV Electrical Hookups

Example Frost Free Hydrant Installation

Example Septic Holding Tank