Wis. Admin. Code Department of Natural Resources NR 110.11

Current through November 25, 2024

Section NR 110.11 - Sewage lift stations

(1) FACILITIES PLANS FOR SEWAGE LIFT STATIONS. The facilities plan shall include the following:

(a)Contributory area. A description of the extent of the existing and proposed contributory area with reference to a general system map as well as description of the areas of probable future expansion of the contributory area.

(b)Location. The location of the proposed lift station, force main and point of discharge to the existing sewer system. In addition the report shall discuss the capacity available in the existing downstream sewer to handle the additional flow.

(c)Flooding. A statement indicating whether the proposed lift station is in a floodway or floodplain as defined in ch. NR 116. All projects shall conform to the requirements of ch. NR 116.

(d)Basis for design. The design data for the proposed project including the following:

1. Design period;

2. Population densities per acre and total population served;

3. Area served in acres;

4. Per capita sewage contribution expressed as an average and as a maximum value;

5. Infiltration and inflow;

6. Industrial waste contributions;

7. Design flow rates expressed as average and maximum values; and

8. Design head conditions.

(e)Essential features. A description of the essential features of construction and operation of the proposed stations.

(f)Costs. Discussion of the estimated capital costs, estimated annual maintenance cost, and estimated annual cost to the average user of the system;

(g)Environmental analysis. The department may require the submittal of an environmental analysis meeting the requirements of s. NR 110.09(3) for large or complex lift station projects, for those projects constructed in environmentally sensitive areas or for projects which could involve significant public controversy.

Note: Facilities plans for sewage lift stations may include results from a system evaluation and capacity assurance plan under s. NR 110.10(4).

(2) CONSTRUCTION PLANS AND SPECIFICATIONS FOR SEWAGE LIFT STATIONS. In addition to the requirements of ch. NR 108 and ss. NR 110.06 and 110.07, the following requirements shall be adhered to for submission of construction plans and specifications for sewage lift stations:

(a)Location plan. A location plan shall be submitted showing the tributary area, the municipal boundaries within the tributary area and the location of the lift station and force main, and all pertinent elevations;

(b)Detailed plans. The detailed lift station plans shall show the following, where applicable:

1. The location and the topography (using a contour map) of the property to be used;

2. The station details and all appurtenant equipment including pumps, sump pumps, heaters, ventilation equipment, valving, access ladder, intermediate landings, and wet well;

3. The elevation of high water at the site, including the maximum elevation of sewage in the collection system in the event of power failure at the station.

Wis. Admin. Code Department of Natural Resources NR 110.11

Cr. Register, November, 1974, No. 227, eff. 12-1-74; r. and recr. Register, December, 1978, No. 276, eff. 1-1-79; CR 12-027: am. (1) (d) 5. Register July 2013 No. 691, eff. 8-1-13; CR 13-022: am. (1) (g) Register March 2014 No. 699, eff. 4-1-14.