Concerning pools: #77-79 (page 48 of protocol) indicates that it is not appropriate to answer these questions in a wetland - wetland scenario, but page 10 does note to complete those parameters (as does Collector when you choose wetland (US) and wetland (DS)).
Concerning hydraulic controls: both the matrix on page 10 and page 51 indicate it is not appropriate to complete these parameters for a wetland - wetland scenario.
Since pools and hydraulic controls are related, we are seeking to clarify whether noting pools in this scenario is correct or not. Thanks!
Yes, that is an error on page 48- those parameters should all me marked with an S/W next to them (will make a note for the 2019 version). As Tom described in detail above, pool presence and depth measurements are critical for the AOP scores, so we need to measure them for all water bodies (except drainages where there wouldn't be fish migrating).
As pages 10 and 51 outline- you can skip hydraulic control information for non-flowing bodies of water (wetlands and surface), because it is not used in the culvert scoring system.
You caught some errors! And a tricky situation. But, I say that for every one, don't I?
First off, the diagram on page 10 is correct (mostly). Since we can compute AOP for wetland crossings, we need to collect pool information because pool variables go into the AOP score. So, do collect 77-79 on the downstream side of wetland crossings. We will update the protocol to make sure that the 'W' indicator is next to the parameter boxes page 48 of the protocol.
The second part of your question can be answered like so:
Some wetland crossings (Us waterbody = wetland) might have a free fall on the downstream side. This could happen regardless of whether the downstream side is a wetland or a stream - pipes can become perched above both of these types of downstream waterbodies. When there is a free fall, the AOP algorithm looks to see if there is a pool present. If a pool is present, it then compares some aspects of the pool (depth) to the height of the free fall, to determine if, for fish that can jump, the pool is deep enough relative to the free fall height to allow for the resting / momentum building the fish needs. So, on the dowstream side of a wetland crossing, that has a free fall at the outlet, we still care about the pool parameters but don't care as much about hydraulic controls that might exist and be defining that pool surface. So, still noting pools for wetland crossings is correct as we are trying to make sure we can score them for AOP, but you can skip the hydraulic control parameter collection.
If the outlet grade for a wetland crossing is 'At Grade', it might be tricky to recognize or define a pool - and that's okay because if the outlet grade is really 'At Grade', then the scoring algorithm doesn't look at pool parameters since their effect on jumping height doesn't need to be analyzed.