Odor and Nutrient Management Newsletter

Spring 1999

Who needs to file manure plans

by Jeffery Lorimor, Extension Ag Engineer

PhotoIn 1998 the Iowa Legislature passed House File 2494,which clarifies portions of Iowa’s existing manure law (House File 519, passed in 1995). HF 2494 also added some new provisions, including those for manure plans.

Who must file plans

Producers with confinement systems (other than Small Animal Feeding Operations) that were built or expanded after May 31, 1985 will now be required to have IDNR-approved manure plans (MP). Small Animal Feeding Operations (SAFO’s) are defined as swine and poultry operations with less than 200,000 lbs. of average bodyweight over one production cycle, or bovine operations with less than 400,000 lbs.

If your production capacity exceeds these numbers, see Table 1, you will need to file a plan.

Table 1. Facility production capacity for filing manure plans.

Average Capacity Species
200,000 lbs. Sows
(400 lbs.)
Nursery pigs
(25 lbs.)
Market Hogs
(150 lbs.)
Farrow to Finish
(10 pigs per litter)
  500 8,000 1,333 105
200,000 lbs. Laying Hens
(4 lbs.)
Broilers
(2 lbs.)
Turkey
(10 lbs.)
 
  50,000 100,000 20,000  
 
400,000 lbs. Slaughter Cattle
(750 lbs.)
Feeder Cattle
(625 lbs.)
Dairy Cattle
(1,500 lbs.)
 
  533 640 267  

The only two exemptions to the new plan requirement are producers with older operations and SAFO’s.

Previously IDNR has defined two classes of MPs: full plans and abbreviated plans. Full plans were required to be submitted for IDNR approval before producers could receive construction permits. Abbreviated plans were required to be filed with IDNR by producers with:

  1. swine operations using formed storage
  2. animal capacities between 200,000 and 625,000 lbs. bodyweight
  3. operations built after September 22, 1995.

The abbreviated plan requirement was adopted because some producers were building several smaller facilities close together, but far enough apart to be considered separate operations. Bovine operations and operations using dry manure systems were exempt from the MP requirement unless they required a construction permit. Abbreviated plans did not include (1) a soil erosion control statement, or (2) signed manure application agreements.

Effective January 1, 1999, all plans submitted to IDNR must be full plans, and IDNR must approve them. The previous exemptions for bovine and dry manure systems no longer apply. Owners of facilities in other states must get MPs approved prior to applying manure in Iowa. The new provisions reach back to 1985 to producers who didn’t’ need plans before, and they require approval for all plans, rather than just the ones submitted as part of construction permit applications.

Plans for each operation must be submitted to IDNR and approved only once. After initial approval, the producer is responsible for keeping the plan up-to-date, and recording any necessary changes due to weather, landlord, etc. prior to that year’s application. The plan must be kept in the producer’s file and available for IDNR inspection upon demand.

No changes were made to the actual planning process. Manure planners should continue to base manure applications rates on crop nutrient needs. Although soil tests for phosphorus and potassium are not required, they are encouraged. Other nitrogen sources such as legume and commercial nitrogen must be accounted for in calculating manure nitrogen application rates. Proven yields used to estimate the nutrients needed must be justified by individual yield records or agency estimates.

In summary, HF2494 changes MP requirements three ways. First, it requires more producers to submit plans. Second, it requires IDNR to approve all plans, not just the ones accompanying construction permit applications. And third, it requires all plans to include a soil erosion statement and signed manure application agreements if applicable. While it affects the plan submission and approval procedures, the basic nutrient planning process remains unchanged.

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Iowa Manure Matters: Odor and Nutrient Management is published by Iowa State University Extension, with funding support from the USDA Natural Resource Conservation Service through Cooperative Agreement No. 74-6114-8-22. To subscribe or change the address of a current subscription, write to Angela Rieck-Hinz, 2104 Agronomy Hall, Iowa State University, Ames, Iowa, 50011-1010 or call 515-294-9590, fax 515-294-9985 or email: amrieck@iastate.edu. Please indicate you are inquiring about the Odor and Nutrient Management Newsletter. The newsletter's coordinators are Angela Rieck-Hinz, extension program specialist, Department of Agronomy, Wendy Powers, environmental extension specialist, Department of Animal Science, and Robert Burns, Department of Agricultural and Biosystems Engineering; the editor is Jean McGuire, the subscription manager is Rachel Klein, the production designer is Beth Kroeschell, and the web page designer is Liisa Jarvinen.

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